Which of these are NOT Active Galactic Nuclei (AGN)?
Q. BL Lac Objects (Blazars) Double-lobed Radio Galaxies Irregular Galaxies Quasars Seyfert Galaxies
Asked by tatoo255 - Fri Jul 4 23:41:21 2008 - - 3 Answers - 0 Comments
A. Irregular galaxies could have active nuclei, but many do not. The other options are all forms of AGNs.
Answered by poldi - Fri Jul 4 23:46:01 2008
Q. BL Lac Objects (Blazars) Double-lobed Radio Galaxies Irregular Galaxies Quasars Seyfert Galaxies
Asked by tatoo255 - Fri Jul 4 23:41:21 2008 - - 3 Answers - 0 Comments
A. Irregular galaxies could have active nuclei, but many do not. The other options are all forms of AGNs.
Answered by poldi - Fri Jul 4 23:46:01 2008
What is the definition of 'quasar' and are they in any way related to black holes?
Q. seasky.org's definiton: Quasar An unusually bright object found in the remote areas of the universe. Quasars release incredible amounts of energy and are among the oldest and farthest objects in the known universe. They may be the nuclei of ancient, active galaxies. Wikipedia's definiton: A quasi-stellar radio source (quasar) is a very energetic and distant galaxy with an active galactic nucleus. Quasars were first identified as being high redshift sources of electromagnetic energy, including radio waves and visible light, that were point-like, similar to stars, rather than extended sources similar to galaxies. If I google quasar and then click image results ( and tehn google black hole and click image results ( some of the images look… [cont.]
Asked by Misty - Sun Mar 7 17:12:06 2010 - - 3 Answers - 0 Comments
A. Given their extremely large distances as testified by their large red-shift, quasars cannot be peculiar to very young galaxies, quite to the contrary. They are objects which strongly resemble the active compact nuclei of certain spirals galaxies emitting strongly in the IR, known as Seyfert galaxies. They contain hot and tenuous gazes resembling the solar corona, with velocities of the order of 1/2000km/s, without it being clear whether this corresponds to gas falling in, shot out, or rotating rapidly. Because their brightness vary sometimes in a matter of hours, they are thought to be small. However given their distance they must be extremely luminous to appear as they do and given their smallness, one estimates that their surface… [cont.]
Answered by jean-de-la-lune - Sun Mar 7 19:53:25 2010
Q. seasky.org's definiton: Quasar An unusually bright object found in the remote areas of the universe. Quasars release incredible amounts of energy and are among the oldest and farthest objects in the known universe. They may be the nuclei of ancient, active galaxies. Wikipedia's definiton: A quasi-stellar radio source (quasar) is a very energetic and distant galaxy with an active galactic nucleus. Quasars were first identified as being high redshift sources of electromagnetic energy, including radio waves and visible light, that were point-like, similar to stars, rather than extended sources similar to galaxies. If I google quasar and then click image results ( and tehn google black hole and click image results ( some of the images look… [cont.]
Asked by Misty - Sun Mar 7 17:12:06 2010 - - 3 Answers - 0 Comments
A. Given their extremely large distances as testified by their large red-shift, quasars cannot be peculiar to very young galaxies, quite to the contrary. They are objects which strongly resemble the active compact nuclei of certain spirals galaxies emitting strongly in the IR, known as Seyfert galaxies. They contain hot and tenuous gazes resembling the solar corona, with velocities of the order of 1/2000km/s, without it being clear whether this corresponds to gas falling in, shot out, or rotating rapidly. Because their brightness vary sometimes in a matter of hours, they are thought to be small. However given their distance they must be extremely luminous to appear as they do and given their smallness, one estimates that their surface… [cont.]
Answered by jean-de-la-lune - Sun Mar 7 19:53:25 2010
Fill in the black, use each word once.?
Q. 1. ___ have the highest rates of star formation. 2. The largest individual galaxies in the universe are known as ___. 3. The collective activity of many supernova events in a relatively small volume of galaxy can create ___. 4. The most luminous objects in the universe are ___. 5. The energy for all active galactic nuclei is thought to comes from in-fall of matter into ___. 6. ___ are often characterized by sources of immense energy located hundreds of thousands of light-years away on either side of their centers. Vocab- Starburst galaxies radio galaxies central dominant galaxies quasars galactic winds supermassive black holes I do my work, and then I double check with this. If you feel that way then don't answer. It says I got two wrong. [cont.]
Asked by Danielle - Tue Jul 6 23:53:03 2010 - - 3 Answers - 0 Comments
A. I'd switch 5) and 6) The infall of matter to the BH heats it up and makes it emit. 1. Starburst galaxies 2. central dominant galaxy 3. galactic winds 4. quasars 5. Supermassive black holes 6. radio galaxies
Answered by ronwizfr - Wed Jul 7 06:02:16 2010
Q. 1. ___ have the highest rates of star formation. 2. The largest individual galaxies in the universe are known as ___. 3. The collective activity of many supernova events in a relatively small volume of galaxy can create ___. 4. The most luminous objects in the universe are ___. 5. The energy for all active galactic nuclei is thought to comes from in-fall of matter into ___. 6. ___ are often characterized by sources of immense energy located hundreds of thousands of light-years away on either side of their centers. Vocab- Starburst galaxies radio galaxies central dominant galaxies quasars galactic winds supermassive black holes I do my work, and then I double check with this. If you feel that way then don't answer. It says I got two wrong. [cont.]
Asked by Danielle - Tue Jul 6 23:53:03 2010 - - 3 Answers - 0 Comments
A. I'd switch 5) and 6) The infall of matter to the BH heats it up and makes it emit. 1. Starburst galaxies 2. central dominant galaxy 3. galactic winds 4. quasars 5. Supermassive black holes 6. radio galaxies
Answered by ronwizfr - Wed Jul 7 06:02:16 2010
astronomy help please?
Q. How does the unified model of active galaxies suggest that quasars, blazars, and radio galaxies are the same kind of objects viewed from different angles? A.The unified model of active galactic nuclei defines a structure that viewed from different directions has the observed characteristics of quasars, blazars, or double radio sources. B. If the jets are along the line of sight, it is seen as a quasar. If the jets are perpendicular to the line of sight, it is seen as a blazar. If it is viewed from some angle in between, we see a double radio source. The unified model of active galactic nuclei defines a structure that viewed from different directions has the observed characteristics of quasars, blazars, or double radio sources. If the… [cont.]
Asked by jpatel10989 - Tue Apr 6 10:47:23 2010 - - 1 Answers - 0 Comments
A. Down the jet: Blazar At an angle to the jet: Quasar At 90 degrees from the jet: Radio galaxy So A and C are correct, B has it inverted.
Answered by ronwizfr - Wed Apr 7 04:08:20 2010
Q. How does the unified model of active galaxies suggest that quasars, blazars, and radio galaxies are the same kind of objects viewed from different angles? A.The unified model of active galactic nuclei defines a structure that viewed from different directions has the observed characteristics of quasars, blazars, or double radio sources. B. If the jets are along the line of sight, it is seen as a quasar. If the jets are perpendicular to the line of sight, it is seen as a blazar. If it is viewed from some angle in between, we see a double radio source. The unified model of active galactic nuclei defines a structure that viewed from different directions has the observed characteristics of quasars, blazars, or double radio sources. If the… [cont.]
Asked by jpatel10989 - Tue Apr 6 10:47:23 2010 - - 1 Answers - 0 Comments
A. Down the jet: Blazar At an angle to the jet: Quasar At 90 degrees from the jet: Radio galaxy So A and C are correct, B has it inverted.
Answered by ronwizfr - Wed Apr 7 04:08:20 2010
how good are you at astronomy?
Q. here are some astronomy questions i would like you to answer. 1) what is the 5th planet from the sun? 2) which planet has the Great Dark Spot? 3)which of these has the greatest gravitational pull? a. the sun b. black hole c. magnetar d. jupiter 4) which of these is the brightest? a. quasars b. the sun c a white hole 5) what is the closest star to the sun? 6) what is the invisible force that is causing our universe to expand? 7) about how many miles are in a lightyear? 8)define ultrarelativistic 9) what is the syncrotron and cyclotron radiation? 10) what is the largest and second largest moon of the solar system and which planets do they belong to? 11) which moon has the most volcanic activity? 12)quasars and blazars are both… [cont.]
Asked by Arslan - Sun Jan 3 03:24:26 2010 - - 1 Answers - 0 Comments
A. 1) Jupiter 2) Neptune 3) black hole (it's the one with the biggest mass) 4) quasars 5) Proxima Centauri 6) Dark Energy (the question wrong: Dark Energy is what makes the Universe expand faster than *expected*) 7) 6x10^12 miles 8) moving at a speed very close to the speed of light 9) The radiation that electrons give off when moving in circles in magnetic fields 10) Ganymede (Jupiter) and Titan (Saturne) 11) Io 12). AGN galaxies (Active Galactic Nuclei) 13) 186,000 miles/second or 670 million miles/hour
Answered by ronwizfr - Sun Jan 3 13:33:09 2010
Q. here are some astronomy questions i would like you to answer. 1) what is the 5th planet from the sun? 2) which planet has the Great Dark Spot? 3)which of these has the greatest gravitational pull? a. the sun b. black hole c. magnetar d. jupiter 4) which of these is the brightest? a. quasars b. the sun c a white hole 5) what is the closest star to the sun? 6) what is the invisible force that is causing our universe to expand? 7) about how many miles are in a lightyear? 8)define ultrarelativistic 9) what is the syncrotron and cyclotron radiation? 10) what is the largest and second largest moon of the solar system and which planets do they belong to? 11) which moon has the most volcanic activity? 12)quasars and blazars are both… [cont.]
Asked by Arslan - Sun Jan 3 03:24:26 2010 - - 1 Answers - 0 Comments
A. 1) Jupiter 2) Neptune 3) black hole (it's the one with the biggest mass) 4) quasars 5) Proxima Centauri 6) Dark Energy (the question wrong: Dark Energy is what makes the Universe expand faster than *expected*) 7) 6x10^12 miles 8) moving at a speed very close to the speed of light 9) The radiation that electrons give off when moving in circles in magnetic fields 10) Ganymede (Jupiter) and Titan (Saturne) 11) Io 12). AGN galaxies (Active Galactic Nuclei) 13) 186,000 miles/second or 670 million miles/hour
Answered by ronwizfr - Sun Jan 3 13:33:09 2010
Questions about galaxy's?
Q. Since quasar's are one of the most distant objects in the universe, when seen though a telescope, or when looking at anything in space such as star's, we are looking back in time as you all know. These things emit tremendous amounts of energy seen in a acceleration disk up to 10 to 100 time's that of our own galaxy, that only a super massive black hole could be the culprit of this power output. So could this be what we are viewing, an active black hole emitting huge amounts of energy in a galaxy still in the form of creation that may no longer be active in this present time due to the time the light takes to reach us here on earth. A lot of people say we don't know what exactly powers these things but isn't it kind of obvious that it is… [cont.]
Asked by Dominic B - Sun Mar 28 23:22:07 2010 - - 3 Answers - 0 Comments
A. Yes, that is exactly what we are viewing and what a quasar is. A quasar is a bright output of massive black holes in the center of galaxies. They're only found in distance galaxies, because there was more matter for the galactic black holes to suck in during the early universe. When we view a quasar we are viewing something that happened billions and billions of years ago that no longer exist, due to their distance.
Answered by George - Sun Mar 28 23:32:13 2010
Q. Since quasar's are one of the most distant objects in the universe, when seen though a telescope, or when looking at anything in space such as star's, we are looking back in time as you all know. These things emit tremendous amounts of energy seen in a acceleration disk up to 10 to 100 time's that of our own galaxy, that only a super massive black hole could be the culprit of this power output. So could this be what we are viewing, an active black hole emitting huge amounts of energy in a galaxy still in the form of creation that may no longer be active in this present time due to the time the light takes to reach us here on earth. A lot of people say we don't know what exactly powers these things but isn't it kind of obvious that it is… [cont.]
Asked by Dominic B - Sun Mar 28 23:22:07 2010 - - 3 Answers - 0 Comments
A. Yes, that is exactly what we are viewing and what a quasar is. A quasar is a bright output of massive black holes in the center of galaxies. They're only found in distance galaxies, because there was more matter for the galactic black holes to suck in during the early universe. When we view a quasar we are viewing something that happened billions and billions of years ago that no longer exist, due to their distance.
Answered by George - Sun Mar 28 23:32:13 2010
Which of these are NOT Active Galactic Nuclei (AGN)?
Q. BL Lac Objects (Blazars) Double-lobed Radio Galaxies Irregular Galaxies Quasars Seyfert Galaxies
Asked by olympiarc - Sat Feb 28 04:20:08 2009 - - 2 Answers - 0 Comments
A. Irregular Galaxies For more details see Wikipedia -
Answered by Mikan - Sat Feb 28 04:59:34 2009
Q. BL Lac Objects (Blazars) Double-lobed Radio Galaxies Irregular Galaxies Quasars Seyfert Galaxies
Asked by olympiarc - Sat Feb 28 04:20:08 2009 - - 2 Answers - 0 Comments
A. Irregular Galaxies For more details see Wikipedia -
Answered by Mikan - Sat Feb 28 04:59:34 2009
What is a quasar?
Q. Has anyone ever figured out, exactly, what quasars are? Are they just galaxies with highly energetic radio jets in their cores, or are they something entirely different? Also, where can I find a book on active galactic nuclei that's written for lay persons, not astrophysics majors?
Asked by WhiteWolf359 - Sat Feb 17 09:34:16 2007 - - 3 Answers - 0 Comments
A. A quasar (contraction of QUASi-stellAR radio source) is an astronomical source of electromagnetic energy, including light. Quasars visible from Earth all show a very high redshift. The scientific consensus is that this high redshift is the result of Hubble's law, meaning that the quasars are very distant. To be observable at that distance, the energy output of quasars must dwarf that of almost every known astrophysical phenomenon with the exception of comparatively short-lived supernovae and gamma-ray bursts. They may readily release energy in levels equal to the output of hundreds of average galaxies combined. The output of light is equivalent to one trillion suns. In optical telescopes, most quasars look like single points of light (i.e. [cont.]
Answered by miley_fan9 - Sat Feb 17 11:15:49 2007
Q. Has anyone ever figured out, exactly, what quasars are? Are they just galaxies with highly energetic radio jets in their cores, or are they something entirely different? Also, where can I find a book on active galactic nuclei that's written for lay persons, not astrophysics majors?
Asked by WhiteWolf359 - Sat Feb 17 09:34:16 2007 - - 3 Answers - 0 Comments
A. A quasar (contraction of QUASi-stellAR radio source) is an astronomical source of electromagnetic energy, including light. Quasars visible from Earth all show a very high redshift. The scientific consensus is that this high redshift is the result of Hubble's law, meaning that the quasars are very distant. To be observable at that distance, the energy output of quasars must dwarf that of almost every known astrophysical phenomenon with the exception of comparatively short-lived supernovae and gamma-ray bursts. They may readily release energy in levels equal to the output of hundreds of average galaxies combined. The output of light is equivalent to one trillion suns. In optical telescopes, most quasars look like single points of light (i.e. [cont.]
Answered by miley_fan9 - Sat Feb 17 11:15:49 2007
From Yahoo Answer Search: 'Active Galactic Nuclei - Quasars'
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can be up to 1000 times that of our Galaxy i e 100 000 billion times that of the Sun They are however difficult to observe as they lie very far away at a few billion light years All AGN emit a wide range of electromagnetic radiation infrared visible ultra violet as well as X rays Some quasars are also strong radio and gamma ray emitters Their emission is highly
![space density of optically-selected type 2 quasars [arxiv:0801.1115]](/TEBr7-ORJGAVECRs707-s707-n807-CGGUq8-YEHs8-KCFNr7-RTNZVs7-TEBr7-FGBUFOZHUGr7-ARCB-out.jpg)
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Wed, 09 Jan 2008 13:49:56 GM
type 2 . quasars. are luminous . active galactic nuclei. (agn) whose central regions are obscured by large amounts of gas and dust. in this paper, we present a catalog of type 2 . quasars. from the sloan digital sky survey (sdss), selected based ...
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