Study Guide 4 Part A Outline
... o The Hubble Law implies Universe is expanding The expansion started at some definite time in the past (the Big Bang)Universe expands away from every galaxy. Every galaxy would see its own version of the Hubble Law. Quasars & Active Galactic Nuclei o Quasars and other active galaxies emit large ...
... o The Hubble Law implies Universe is expanding The expansion started at some definite time in the past (the Big Bang)Universe expands away from every galaxy. Every galaxy would see its own version of the Hubble Law. Quasars & Active Galactic Nuclei o Quasars and other active galaxies emit large ...
chapter 28 pages 747-752
... • Therefore scientists interpret this to be coming from the beginning of the big bang ...
... • Therefore scientists interpret this to be coming from the beginning of the big bang ...
Study Guide Ch10,11 and 12
... 10. Describe the different types of active galaxies, and the mechanisms proposed to explain their energy output and other characteristics. 11. Briefly relate the story of the discovery of quasars 12. Describe the current explanation of quasars and their energy sources. ...
... 10. Describe the different types of active galaxies, and the mechanisms proposed to explain their energy output and other characteristics. 11. Briefly relate the story of the discovery of quasars 12. Describe the current explanation of quasars and their energy sources. ...
Mon Aug 5, 2013 QUASAR DISCOVERY Quasars were discovered
... Mon Aug 5, 2013 QUASAR DISCOVERY Quasars were discovered on August 5th, 1962. The first quasar found has the unromantic designation, 3C273, and it was discovered by a radio telescope when the object disappeared behind the moon during a lunar occultation. Quasi-stellar radio sources, or quasars, are ...
... Mon Aug 5, 2013 QUASAR DISCOVERY Quasars were discovered on August 5th, 1962. The first quasar found has the unromantic designation, 3C273, and it was discovered by a radio telescope when the object disappeared behind the moon during a lunar occultation. Quasi-stellar radio sources, or quasars, are ...
Review 1 Solutions
... galaxy clusters near the line of sight to gravitationally lensed objects. F ...
... galaxy clusters near the line of sight to gravitationally lensed objects. F ...
PowerPoint Presentation - Super Massive Black Holes
... found, no visible source other than a stellar-looking object was found (it looked like a point of light --- like a star does). These objects were called the "qausi-stellar radio sources", or "quasars" for short. ...
... found, no visible source other than a stellar-looking object was found (it looked like a point of light --- like a star does). These objects were called the "qausi-stellar radio sources", or "quasars" for short. ...
Black Hole Video Questions
... 8. If a space probe were to look out of a black hole it would see (blackness) (light being sucked in) (nothing). 9. If a space probe were to look into of a black hole it would see the center of the black hole called the (accretion disk) (event horizon) (singularity). 10. Most black holes are about ( ...
... 8. If a space probe were to look out of a black hole it would see (blackness) (light being sucked in) (nothing). 9. If a space probe were to look into of a black hole it would see the center of the black hole called the (accretion disk) (event horizon) (singularity). 10. Most black holes are about ( ...
2014 Joseph E. Pesce, Ph.D. 1 Astro 113 Final Exam Review 1. What
... 1. What is the Cosmic Microwave Background Radiation? 2. What are the basic stages in the Sun's history? 3. What are the various astronomical distance measures? 4. Suppose the Hubble constant, H ...
... 1. What is the Cosmic Microwave Background Radiation? 2. What are the basic stages in the Sun's history? 3. What are the various astronomical distance measures? 4. Suppose the Hubble constant, H ...
Article in text format ()
... later than the accretion disc’s visible light. Based on that precisely measured time delay, Chini's team determined for the first time the internal concave form of the dust mantle and, consequently, the correct distance from the black hole which now corresponds with the theoretical prognoses. Julia ...
... later than the accretion disc’s visible light. Based on that precisely measured time delay, Chini's team determined for the first time the internal concave form of the dust mantle and, consequently, the correct distance from the black hole which now corresponds with the theoretical prognoses. Julia ...
ASTRONOMY WEBQUEST…… EXPLORE THE UNIVERSE
... http://library.thinkquest.org/26220/stars/formation.html What is a nebula (click on protostars)? ...
... http://library.thinkquest.org/26220/stars/formation.html What is a nebula (click on protostars)? ...
Document
... probe to the statistical properties of quasar host galaxies at high-redshift – Combining with quasar density quasar lifetime and duty cycle ...
... probe to the statistical properties of quasar host galaxies at high-redshift – Combining with quasar density quasar lifetime and duty cycle ...
Adam Myers
... are over 3 billion light years away, some are at distances corresponding to the early Universe Quasars are at great distances - so are very luminous The most luminous quasars are (intrinsically) more than 100 times the brightness of our Galaxy Quasar ...
... are over 3 billion light years away, some are at distances corresponding to the early Universe Quasars are at great distances - so are very luminous The most luminous quasars are (intrinsically) more than 100 times the brightness of our Galaxy Quasar ...
Quasars, Active Galaxies, and Gamma
... • Short, intense bursts of gamma rays are observed at random times coming from random parts of the sky • The origin of short-duration gamma-ray bursters is unknown ...
... • Short, intense bursts of gamma rays are observed at random times coming from random parts of the sky • The origin of short-duration gamma-ray bursters is unknown ...
Quasars and AGN
... • LEdd:Eddington luminosity M: Mass of black hole • For luminosities L>LEdd the radiation pressure will stop material accreting onto the black hole. • For QSOs 3C 273 L=3x1013 L. If this is the Eddington limit (the smallest black hole that can produce this luminosity) then the black hole mass M=109 ...
... • LEdd:Eddington luminosity M: Mass of black hole • For luminosities L>LEdd the radiation pressure will stop material accreting onto the black hole. • For QSOs 3C 273 L=3x1013 L. If this is the Eddington limit (the smallest black hole that can produce this luminosity) then the black hole mass M=109 ...
Lecture notes 19: Active Galaxies
... All of these objects are examples of quasars, from quasi-stellar radio sources. Also radio quiet quasars have been discovered, these are also known as as QSO’s (quasi-stellar objects). In total 10% of quasars are radio loud, 90% radio quiet. There are now 10 000 quasars known with red-shifts z = 0.0 ...
... All of these objects are examples of quasars, from quasi-stellar radio sources. Also radio quiet quasars have been discovered, these are also known as as QSO’s (quasi-stellar objects). In total 10% of quasars are radio loud, 90% radio quiet. There are now 10 000 quasars known with red-shifts z = 0.0 ...
Lecture 32 Quasars
... – A typical quasar has a luminosity 100 times as large as the Milky Way's luminosity. – Because of luminosity and distance, observing quasars can tell us about the intergalactic medium (IGM) between us and the source. Apr 12, 2006 ...
... – A typical quasar has a luminosity 100 times as large as the Milky Way's luminosity. – Because of luminosity and distance, observing quasars can tell us about the intergalactic medium (IGM) between us and the source. Apr 12, 2006 ...
The First Stars and Black Holes
... BeppoSAX+ground: fading afterglow in optical, high redshift, host galaxy • Later bursts: some have optical/X-ray signature of fading supernova • Collapsar picture ...
... BeppoSAX+ground: fading afterglow in optical, high redshift, host galaxy • Later bursts: some have optical/X-ray signature of fading supernova • Collapsar picture ...
Black Holes - World of Teaching
... The shrunken star too small to be measured but with indefinite density ...
... The shrunken star too small to be measured but with indefinite density ...
633 infrared, ultraviolet, x-ray, and gamma
... gas gives off huge amounts of radiation before disappearing inside the black hole. Scientists currently recognize many phenomena associated with active galaxies, including quasars and blazars. Quasars are extremely distant objects, some as far away as 12 billion light-years. A quasar is also extreme ...
... gas gives off huge amounts of radiation before disappearing inside the black hole. Scientists currently recognize many phenomena associated with active galaxies, including quasars and blazars. Quasars are extremely distant objects, some as far away as 12 billion light-years. A quasar is also extreme ...
How do we know?? = (apparent brightness) x distance Luminosity Apparent brightness:
... • Discovered quasars from their radio emission. Orion nebula ...
... • Discovered quasars from their radio emission. Orion nebula ...
Quasar
Quasars (/ˈkweɪzɑr/) or quasi-stellar radio sources are the most energetic and distant members of a class of objects called active galactic nuclei (AGN). Quasars are extremely luminous and were first identified as being high redshift sources of electromagnetic energy, including radio waves and visible light, that appeared to be similar to stars, rather than extended sources similar to galaxies. Their spectra contain very broad emission lines, unlike any known from stars, hence the name ""quasi-stellar."" Their luminosity can be 100 times greater than that of the Milky Way. Most quasars were formed approximately 12 billion years ago caused by collisions of galaxies and their central black holes merging to form either a supermassive black hole or a Binary black hole system.Although the true nature of these objects was controversial until the early 1980s, there is now a scientific consensus that a quasar is a compact region in the center of a massive galaxy surrounding a central supermassive black hole. Its size is 10–10,000 times the Schwarzschild radius of the black hole. The energy emitted by a quasar derives from mass falling onto the accretion disc around the black hole.