Sign in with Twitter Sign in with Facebook

Type the topic in any language to check out real time results of Who's Talking on Social Media Sites


Trending Topics: ZIPでデビクロST最終アナ雪超えTV AparecidaUyumayanlarBuTagda GTyapıyor#AnadildeEğitimeEVET#SebCallMe#ClaraAguilarNoClipeCBJR#AgtFinaleStartsTonight#BuGecekiLafımKimUlanBu EfeAkbayErkeksen AdınlaTagAç#scatfilms#UykuTutmayanlaraÖnerim#MarinaCensura#CongratulationSophiam#GetWellSoonJonas#GeçmişeGeriGidip#JapaneseBambinos#5SOSSauceTastesLike#EMABiggestFans1DTiu MarkitoMurat Yağış#GeceleriUyuyamamakまだメンテFinding Carter#jacobsnewvineiOS 8Margoナースのお仕事詫び石#雑な説明で何のアニメか分かったらRTChedjouJacobs#1番くだらない理由で怪我したことある奴が優勝12年ぶりJonas GutierrezEastendersGillian Anderson#crimewatch学校いってきNew GirlLucasDortmundNilmarChristmasグッピーNOJODid JacobKutupEsmeri SAm1dy#KlavyeMücahidleri#tovendo#DanielsHoodie#camdreaMexican Independence Dayパズドラメンテ昨日の地震Billy Elliot度胸兄弟Adrian Peterson SonSurgeJonathan BennettTommy ChongMockingjay TrailerSadie RobertsonBethany MotaAugust AlsinaMindy KalingBarbra StreisandBetsey JohnsonMasterchefMiss AmericaEva Mendes49ersEaglesSeahawksUrban OutfittersDancing With the StarsRobin ThickeMore

Most recent 20 results returned for keyword: Main Sequence (Search this on MAP)

https://plus.google.com/111015339149287156390 Adam Koski : M44: The Beehive Cluster Image Credit & Copyright: Bob Franke Explanation: A mere 600 light-years away...
M44: The Beehive Cluster
Image Credit & Copyright: Bob Franke
Explanation: A mere 600 light-years away, M44 is one of the closest star clusters to our solar system. Also known as the Praesepe or the Beehive cluster its stars are young though, about 600 million years old compared to our Sun's 4.5 billion years. Based on similar ages and motion through space, M44 and the even closer Hyades star cluster in Taurus are thought to have been born together in the same large molecular cloud. An open cluster spanning some 15 light-years, M44 holds 1,000 stars or so and covers about 3 full moons (1.5 degrees) on the sky in the constellation Cancer. Visible to the unaided eye, M44 has been recognized since antiquity. Described as a faint cloud or celestial mist long before being included as the 44th entry in Charles Messier's 18th century catalog, the cluster was not resolved into its individual stars until telescopes were available. A popular target for modern, binocular-equiped sky gazers, the cluster's few yellowish tinted, cool, red giants are scattered through the field of its brighter hot blue main sequence stars in this colorful stellar group snapshot.
https://lh3.googleusercontent.com/-Pt4bV1YZgxw/VBd9XdJqDdI/AAAAAAAAF-M/y_u3p9zIdnk/w506-h750/m44franke900.jpg
23 hours ago - Via Community - View -
https://plus.google.com/111015339149287156390 Adam Koski : M44: The Beehive Cluster Image Credit & Copyright: Bob Franke Explanation: A mere 600 light-years away...
M44: The Beehive Cluster
Image Credit & Copyright: Bob Franke
Explanation: A mere 600 light-years away, M44 is one of the closest star clusters to our solar system. Also known as the Praesepe or the Beehive cluster its stars are young though, about 600 million years old compared to our Sun's 4.5 billion years. Based on similar ages and motion through space, M44 and the even closer Hyades star cluster in Taurus are thought to have been born together in the same large molecular cloud. An open cluster spanning some 15 light-years, M44 holds 1,000 stars or so and covers about 3 full moons (1.5 degrees) on the sky in the constellation Cancer. Visible to the unaided eye, M44 has been recognized since antiquity. Described as a faint cloud or celestial mist long before being included as the 44th entry in Charles Messier's 18th century catalog, the cluster was not resolved into its individual stars until telescopes were available. A popular target for modern, binocular-equiped sky gazers, the cluster's few yellowish tinted, cool, red giants are scattered through the field of its brighter hot blue main sequence stars in this colorful stellar group snapshot.
https://lh4.googleusercontent.com/-U8E22ukgxS0/VBd9R3UZKJI/AAAAAAAAF9o/qQRZ5uqU5tw/w506-h750/m44franke900.jpg
23 hours ago - Via Google+ - View -
https://plus.google.com/111252226519435716103 Doddie Everett : Mysterious Quasar Sequence Explained http://b4in.org/a8Re Quasars are supermassive black holes that...
Mysterious Quasar Sequence Explained http://b4in.org/a8Re

Quasars are supermassive black holes that live at the center of distant massive galaxies. They shine as the most luminous beacons in the sky across the entire electromagnetic spectrum by rapidly accreting matter into their gravitationally inescapable centers.

New work from Carnegie’s Hubble Fellow Yue Shen and Luis Ho of the Kavli Institute for Astronomy and Astrophysics (KIAA) at Peking University solves a quasar mystery that astronomers have been puzzling over for 20 years. Their work, published in the September 11 issue of Nature, shows that most observed quasar phenomena can be unified with two simple quantities: one that describes how efficiently the hole is being fed, and the other that reflects the viewing orientation of the astronomer.

Quasars display a broad range of outward appearances when viewed by astronomers, reflecting the diversity in the conditions of the regions close to their centers. But despite this variety, quasars have a surprising amount of regularity in their quantifiable physical properties, which follow well-defined trends (referred to as the “main sequence” of quasars) discovered more than 20 years ago. Shen and Ho solved a two-decade puzzle in quasar research: What unifies these properties into this main sequence?

Using the largest and most-homogeneous sample to date of over 20,000 quasars from the Sloan Digital Sky Survey, combined with several novel statistical tests, Shen and Ho were able to demonstrate that one particular property related to the accretion of the hole, called the Eddington ratio, is the driving force behind the so-called main sequence.

The Eddington ratio describes the efficiency of matter fueling the black hole, the competition between the gravitational force pulling matter inward and the luminosity driving radiation outward. This push and pull between gravity and luminosity has long been suspected to be the primary driver behind the so-called main sequence, and their work at long last confirms this hypothesis.
   
More http://b4in.org/a8Re
https://lh5.googleusercontent.com/-z0ZdrSc6I0k/VBTQG_RB0hI/AAAAAAACG3Y/hsY8MNKKE0Y/w506-h750/quasar-617x416%2B%25282%2529.jpg
2 days ago - Via Reshared Post - View -
https://plus.google.com/106784361225747692906 Ineffable Island : Mysterious Quasar Sequence Explained http://b4in.org/a8Re Quasars are supermassive black holes that...
Mysterious Quasar Sequence Explained http://b4in.org/a8Re

Quasars are supermassive black holes that live at the center of distant massive galaxies. They shine as the most luminous beacons in the sky across the entire electromagnetic spectrum by rapidly accreting matter into their gravitationally inescapable centers. 

New work from Carnegie’s Hubble Fellow Yue Shen and Luis Ho of the Kavli Institute for Astronomy and Astrophysics (KIAA) at Peking University solves a quasar mystery that astronomers have been puzzling over for 20 years. Their work, published in the September 11 issue of Nature, shows that most observed quasar phenomena can be unified with two simple quantities: one that describes how efficiently the hole is being fed, and the other that reflects the viewing orientation of the astronomer.

Quasars display a broad range of outward appearances when viewed by astronomers, reflecting the diversity in the conditions of the regions close to their centers. But despite this variety, quasars have a surprising amount of regularity in their quantifiable physical properties, which follow well-defined trends (referred to as the “main sequence” of quasars) discovered more than 20 years ago. Shen and Ho solved a two-decade puzzle in quasar research: What unifies these properties into this main sequence?

Using the largest and most-homogeneous sample to date of over 20,000 quasars from the Sloan Digital Sky Survey, combined with several novel statistical tests, Shen and Ho were able to demonstrate that one particular property related to the accretion of the hole, called the Eddington ratio, is the driving force behind the so-called main sequence. 

The Eddington ratio describes the efficiency of matter fueling the black hole, the competition between the gravitational force pulling matter inward and the luminosity driving radiation outward. This push and pull between gravity and luminosity has long been suspected to be the primary driver behind the so-called main sequence, and their work at long last confirms this hypothesis.
   
More http://b4in.org/a8Re
https://lh5.googleusercontent.com/-JrFovfBG6mw/VBTQMqFqMiI/AAAAAAAAzXQ/3HEdGzM8-rA/w506-h750/quasar-617x416%2B%25282%2529.jpg
3 days ago - Via Google+ - View -
https://plus.google.com/106367437462193297169 Before It's News : Mysterious Quasar Sequence Explained http://b4in.org/a8Re Quasars are supermassive black holes that...
Mysterious Quasar Sequence Explained http://b4in.org/a8Re

Quasars are supermassive black holes that live at the center of distant massive galaxies. They shine as the most luminous beacons in the sky across the entire electromagnetic spectrum by rapidly accreting matter into their gravitationally inescapable centers.

New work from Carnegie’s Hubble Fellow Yue Shen and Luis Ho of the Kavli Institute for Astronomy and Astrophysics (KIAA) at Peking University solves a quasar mystery that astronomers have been puzzling over for 20 years. Their work, published in the September 11 issue of Nature, shows that most observed quasar phenomena can be unified with two simple quantities: one that describes how efficiently the hole is being fed, and the other that reflects the viewing orientation of the astronomer.

Quasars display a broad range of outward appearances when viewed by astronomers, reflecting the diversity in the conditions of the regions close to their centers. But despite this variety, quasars have a surprising amount of regularity in their quantifiable physical properties, which follow well-defined trends (referred to as the “main sequence” of quasars) discovered more than 20 years ago. Shen and Ho solved a two-decade puzzle in quasar research: What unifies these properties into this main sequence?

Using the largest and most-homogeneous sample to date of over 20,000 quasars from the Sloan Digital Sky Survey, combined with several novel statistical tests, Shen and Ho were able to demonstrate that one particular property related to the accretion of the hole, called the Eddington ratio, is the driving force behind the so-called main sequence.

The Eddington ratio describes the efficiency of matter fueling the black hole, the competition between the gravitational force pulling matter inward and the luminosity driving radiation outward. This push and pull between gravity and luminosity has long been suspected to be the primary driver behind the so-called main sequence, and their work at long last confirms this hypothesis.
   
More http://b4in.org/a8Re
https://lh5.googleusercontent.com/-z0ZdrSc6I0k/VBTQG_RB0hI/AAAAAAACG3Y/hsY8MNKKE0Y/w506-h750/quasar-617x416%2B%25282%2529.jpg
3 days ago - Via Google+ - View -
https://plus.google.com/109135343576516593630 Graveyard Shift Astronomy : EQ Pegasi - The stars range in age from newborns to more than 13 billion years. Astronomers recently...
EQ Pegasi - The stars range in age from newborns to more than 13 billion years. Astronomers recently discovered that two faint red stars just 20 light-years away are so young that they haven’t yet ignited their nuclear furnaces. That makes them the closest “pre-main-sequence” stars to Earth. Most stars, including the Sun, are on the “main sequence.” These stars generate energy by converting hydrogen to helium in their cores. But a pre-main-sequence star isn’t yet produc... http://ow.ly/2NrsGa
EQ Pegasi | StarDate Online
The stars range in age from newborns to more than 13 billion years. Astronomers recently discovered that two faint red stars just 20 light-years away are so young that they haven't yet ignited their nuclear furnaces. That makes them the closest “pre-main-sequence” stars to Earth.
3 days ago - Via - View -
https://plus.google.com/112326639704050687309 Cosmologia Quântica : http://chandra.harvard.edu/xray_sources/stellar_evolution.html Stellar Evolution: The Milky Way Galaxy...
http://chandra.harvard.edu/xray_sources/stellar_evolution.html
Stellar Evolution:
The Milky Way Galaxy contains several hundred billion stars of all ages, sizes and masses. One of the central quests of astronomy is to understand how these star form, shine for billions of years, and eventually fade quietly into the dark as white dwarf, or go out with a bang as supernovas.
Chandra and other X-ray telescopes focus on the high-energy action of this drama - sudden outbursts on the turbulent surfaces of stars, gale-force outflows of gas from hot, luminous stars, and awesome shock waves generated by supernova explosions.
A star is born when a cloud of gas and dust collapses to the point where the material in the center of the clump is so dense and hot that the nuclear fusion of hydrogen nuclei into helium nuclei can occur. The outflow of energy released by these reactions provides the pressure necessary to halt the collapse. Note that the nuclear reactions inside stars are nuclear fusion reactions in which the nuclei of light elements are fused together to form heavier elements (for example hydrogen nuclei are combined to form a helium nucleus) with the release of energy. In contrast, power plants on Earth produce energy through nuclear fission, in which the nuclei of heavier elements such as uranium are split apart to form smaller nuclei with the release of energy.
Hydrogen Burning Core (Main Sequence)
Fusion of hydrogen into helium in the core of star can sustain a star such as the Sun for billions of years. The Sun is now in this long-lived phase of its evolution, called the main-sequence phase.
Red Giants.
When the hydrogen in the star's core is used up, the energy flow from the core of the star stops, the central regions of the star will slowly collapse and heat up. Nuclear reactions in a shell of gas outside the core will provide a new source of energy, and cause the aging star to expand outward in the "red giant" phase.
Mass Matters.
If the star is about the same mass as the Sun, it will turn into a white dwarf star. If it is somewhat more massive, it may undergo a supernova explosion and leave behind a neutron star. But if the collapsing core of the star is very great-at least three times the mass of the Sun-nothing can stop the collapse. The central part of the star - the entire star if the star is massive enough - implodes to form an infinite gravitational warp in space called a black hole.
.


Chandra :: Field Guide to X-ray Astronomy :: Stellar Evolution


An explanation of cosmic X-ray sources, from black holes to galaxy clusters, as well as a review of the history of X-ray astronomy, what X-rays are and how they are produced.
4 days ago - Via Google+ - View -
https://plus.google.com/109548387308482818772 Raul Albaladejo : The Quasar Main Sequence from Sky & Telescope: Astronomers are edging closer to understanding why some...
The Quasar Main Sequence
from Sky & Telescope: Astronomers are edging closer to understanding why some quasars look different from others. Quasars are the most powerful active galactic nuclei, blazing beacons in distant galaxies’ centers powered by supermassive black holes chowing down gas. Their visible-light emission comes from two main sources: the hot accretion disk around the black hole, and gas clouds orbiting nearby that are ionized by the radiation coming from the disk. Read more: http://www.skyandtelescope.com/astronomy-news/quasar-main-sequence-091020142/
Image Credit:  ESO / M. Kornmesser
https://lh3.googleusercontent.com/-fPWjjbhYTlg/VBJJo3aR_2I/AAAAAAAARlI/AerrSrFp7vY/w506-h750/Quasar_illo1_341px.gif
4 days ago - Via Reshared Post - View -
https://plus.google.com/100348143142357951433 GENOCIDE : The Quasar Main Sequence from Sky & Telescope: Astronomers are edging closer to understanding why some...
The Quasar Main Sequence
from Sky & Telescope: Astronomers are edging closer to understanding why some quasars look different from others. Quasars are the most powerful active galactic nuclei, blazing beacons in distant galaxies’ centers powered by supermassive black holes chowing down gas. Their visible-light emission comes from two main sources: the hot accretion disk around the black hole, and gas clouds orbiting nearby that are ionized by the radiation coming from the disk. Read more: http://www.skyandtelescope.com/astronomy-news/quasar-main-sequence-091020142/
Image Credit:  ESO / M. Kornmesser
https://lh3.googleusercontent.com/-fPWjjbhYTlg/VBJJo3aR_2I/AAAAAAAARlI/AerrSrFp7vY/w506-h750/Quasar_illo1_341px.gif
4 days ago - Via Reshared Post - View -
https://plus.google.com/103332576617753441845 Melvin Yurdakul : The Quasar Main Sequence from Sky & Telescope: Astronomers are edging closer to understanding why some...
The Quasar Main Sequence
from Sky & Telescope: Astronomers are edging closer to understanding why some quasars look different from others. Quasars are the most powerful active galactic nuclei, blazing beacons in distant galaxies’ centers powered by supermassive black holes chowing down gas. Their visible-light emission comes from two main sources: the hot accretion disk around the black hole, and gas clouds orbiting nearby that are ionized by the radiation coming from the disk. Read more: http://www.skyandtelescope.com/astronomy-news/quasar-main-sequence-091020142/
Image Credit:  ESO / M. Kornmesser
https://lh3.googleusercontent.com/-fPWjjbhYTlg/VBJJo3aR_2I/AAAAAAAARlI/AerrSrFp7vY/w506-h750/Quasar_illo1_341px.gif
4 days ago - Via Reshared Post - View -
https://plus.google.com/105639335882883107579 nik williams : The Quasar Main Sequence from Sky & Telescope: Astronomers are edging closer to understanding why some...
The Quasar Main Sequence
from Sky & Telescope: Astronomers are edging closer to understanding why some quasars look different from others. Quasars are the most powerful active galactic nuclei, blazing beacons in distant galaxies’ centers powered by supermassive black holes chowing down gas. Their visible-light emission comes from two main sources: the hot accretion disk around the black hole, and gas clouds orbiting nearby that are ionized by the radiation coming from the disk. Read more: http://www.skyandtelescope.com/astronomy-news/quasar-main-sequence-091020142/
Image Credit:  ESO / M. Kornmesser
https://lh3.googleusercontent.com/-fPWjjbhYTlg/VBJJo3aR_2I/AAAAAAAARlI/AerrSrFp7vY/w506-h750/Quasar_illo1_341px.gif
4 days ago - Via Reshared Post - View -
https://plus.google.com/116741442137904831168 FILMS/VIDEOS/TECHNOLOGIES/SCIENCES/SPIRITUALITE : The Quasar Main Sequence from Sky & Telescope: Astronomers are edging closer to understanding why some...
The Quasar Main Sequence
from Sky & Telescope: Astronomers are edging closer to understanding why some quasars look different from others. Quasars are the most powerful active galactic nuclei, blazing beacons in distant galaxies’ centers powered by supermassive black holes chowing down gas. Their visible-light emission comes from two main sources: the hot accretion disk around the black hole, and gas clouds orbiting nearby that are ionized by the radiation coming from the disk. Read more: http://www.skyandtelescope.com/astronomy-news/quasar-main-sequence-091020142/
Image Credit:  ESO / M. Kornmesser
https://lh3.googleusercontent.com/-fPWjjbhYTlg/VBJJo3aR_2I/AAAAAAAARlI/AerrSrFp7vY/w506-h750/Quasar_illo1_341px.gif
4 days ago - Via Reshared Post - View -
https://plus.google.com/106722314406326889720 MIND PROGRAMS : The Quasar Main Sequence from Sky & Telescope: Astronomers are edging closer to understanding why some...
The Quasar Main Sequence
from Sky & Telescope: Astronomers are edging closer to understanding why some quasars look different from others. Quasars are the most powerful active galactic nuclei, blazing beacons in distant galaxies’ centers powered by supermassive black holes chowing down gas. Their visible-light emission comes from two main sources: the hot accretion disk around the black hole, and gas clouds orbiting nearby that are ionized by the radiation coming from the disk. Read more: http://www.skyandtelescope.com/astronomy-news/quasar-main-sequence-091020142/
Image Credit:  ESO / M. Kornmesser
https://lh3.googleusercontent.com/-fPWjjbhYTlg/VBJJo3aR_2I/AAAAAAAARlI/AerrSrFp7vY/w506-h750/Quasar_illo1_341px.gif
4 days ago - Via Reshared Post - View -
https://plus.google.com/116284567168218977443 nicky l : The Quasar Main Sequence from Sky & Telescope: Astronomers are edging closer to understanding why some...
The Quasar Main Sequence
from Sky & Telescope: Astronomers are edging closer to understanding why some quasars look different from others. Quasars are the most powerful active galactic nuclei, blazing beacons in distant galaxies’ centers powered by supermassive black holes chowing down gas. Their visible-light emission comes from two main sources: the hot accretion disk around the black hole, and gas clouds orbiting nearby that are ionized by the radiation coming from the disk. Read more: http://www.skyandtelescope.com/astronomy-news/quasar-main-sequence-091020142/
Image Credit:  ESO / M. Kornmesser
https://lh3.googleusercontent.com/-fPWjjbhYTlg/VBJJo3aR_2I/AAAAAAAARlI/AerrSrFp7vY/w506-h750/Quasar_illo1_341px.gif
4 days ago - Via Reshared Post - View -
https://plus.google.com/116090734596462915915 Steven Rogers : The Quasar Main Sequence from Sky & Telescope: Astronomers are edging closer to understanding why some...
The Quasar Main Sequence
from Sky & Telescope: Astronomers are edging closer to understanding why some quasars look different from others. Quasars are the most powerful active galactic nuclei, blazing beacons in distant galaxies’ centers powered by supermassive black holes chowing down gas. Their visible-light emission comes from two main sources: the hot accretion disk around the black hole, and gas clouds orbiting nearby that are ionized by the radiation coming from the disk. Read more: http://www.skyandtelescope.com/astronomy-news/quasar-main-sequence-091020142/
Image Credit:  ESO / M. Kornmesser
https://lh3.googleusercontent.com/-fPWjjbhYTlg/VBJJo3aR_2I/AAAAAAAARlI/AerrSrFp7vY/w506-h750/Quasar_illo1_341px.gif
4 days ago - Via Reshared Post - View -
https://plus.google.com/109344236334153429650 Abd Elmoumen : The Quasar Main Sequence from Sky & Telescope: Astronomers are edging closer to understanding why some...
The Quasar Main Sequence
from Sky & Telescope: Astronomers are edging closer to understanding why some quasars look different from others. Quasars are the most powerful active galactic nuclei, blazing beacons in distant galaxies’ centers powered by supermassive black holes chowing down gas. Their visible-light emission comes from two main sources: the hot accretion disk around the black hole, and gas clouds orbiting nearby that are ionized by the radiation coming from the disk. Read more: http://www.skyandtelescope.com/astronomy-news/quasar-main-sequence-091020142/
Image Credit:  ESO / M. Kornmesser
https://lh3.googleusercontent.com/-fPWjjbhYTlg/VBJJo3aR_2I/AAAAAAAARlI/AerrSrFp7vY/w506-h750/Quasar_illo1_341px.gif
4 days ago - Via Reshared Post - View -
https://plus.google.com/111386628849293249492 sasan mohammade : The Quasar Main Sequence from Sky & Telescope: Astronomers are edging closer to understanding why some...
The Quasar Main Sequence
from Sky & Telescope: Astronomers are edging closer to understanding why some quasars look different from others. Quasars are the most powerful active galactic nuclei, blazing beacons in distant galaxies’ centers powered by supermassive black holes chowing down gas. Their visible-light emission comes from two main sources: the hot accretion disk around the black hole, and gas clouds orbiting nearby that are ionized by the radiation coming from the disk. Read more: http://www.skyandtelescope.com/astronomy-news/quasar-main-sequence-091020142/
Image Credit:  ESO / M. Kornmesser
https://lh3.googleusercontent.com/-fPWjjbhYTlg/VBJJo3aR_2I/AAAAAAAARlI/AerrSrFp7vY/w506-h750/Quasar_illo1_341px.gif
4 days ago - Via Reshared Post - View -
https://plus.google.com/100326016134903327207 Clarissa Jackman : The Quasar Main Sequence from Sky & Telescope: Astronomers are edging closer to understanding why some...
The Quasar Main Sequence
from Sky & Telescope: Astronomers are edging closer to understanding why some quasars look different from others. Quasars are the most powerful active galactic nuclei, blazing beacons in distant galaxies’ centers powered by supermassive black holes chowing down gas. Their visible-light emission comes from two main sources: the hot accretion disk around the black hole, and gas clouds orbiting nearby that are ionized by the radiation coming from the disk. Read more: http://www.skyandtelescope.com/astronomy-news/quasar-main-sequence-091020142/
Image Credit:  ESO / M. Kornmesser
https://lh3.googleusercontent.com/-fPWjjbhYTlg/VBJJo3aR_2I/AAAAAAAARlI/AerrSrFp7vY/w506-h750/Quasar_illo1_341px.gif
4 days ago - Via Reshared Post - View -
https://plus.google.com/101470540490618598904 נמרוד בראל : The Quasar Main Sequence from Sky & Telescope: Astronomers are edging closer to understanding why some...
The Quasar Main Sequence
from Sky & Telescope: Astronomers are edging closer to understanding why some quasars look different from others. Quasars are the most powerful active galactic nuclei, blazing beacons in distant galaxies’ centers powered by supermassive black holes chowing down gas. Their visible-light emission comes from two main sources: the hot accretion disk around the black hole, and gas clouds orbiting nearby that are ionized by the radiation coming from the disk. Read more: http://www.skyandtelescope.com/astronomy-news/quasar-main-sequence-091020142/
Image Credit:  ESO / M. Kornmesser
https://lh3.googleusercontent.com/-fPWjjbhYTlg/VBJJo3aR_2I/AAAAAAAARlI/AerrSrFp7vY/w506-h750/Quasar_illo1_341px.gif
4 days ago - Via Reshared Post - View -
https://plus.google.com/114526432237944730993 Andrea Branderhorst : The Quasar Main Sequence from Sky & Telescope: Astronomers are edging closer to understanding why some...
The Quasar Main Sequence
from Sky & Telescope: Astronomers are edging closer to understanding why some quasars look different from others. Quasars are the most powerful active galactic nuclei, blazing beacons in distant galaxies’ centers powered by supermassive black holes chowing down gas. Their visible-light emission comes from two main sources: the hot accretion disk around the black hole, and gas clouds orbiting nearby that are ionized by the radiation coming from the disk. Read more: http://www.skyandtelescope.com/astronomy-news/quasar-main-sequence-091020142/
Image Credit:  ESO / M. Kornmesser
https://lh3.googleusercontent.com/-fPWjjbhYTlg/VBJJo3aR_2I/AAAAAAAARlI/AerrSrFp7vY/w506-h750/Quasar_illo1_341px.gif
4 days ago - Via Reshared Post - View -