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I don't see the purpose of this page. There are now some hundreds of thousands of quasars known (e.g. the SDSS has spectra of ~100,000, 2dF has ~25,000). Most of the entries on this list have very little information provided about them besides a link to NED and/or SIMBAD. Unless we have guidelines for inclusion, I think this whole page should be deleted. I'll wait a while to hear counter arguments, and then I'll make a request for deletion. - Parejkoj ( talk) 17:41, 30 April 2008 (UTC)
That would be a very difficult list to maintain. Having 10 items per is going to be difficult to keep track of, since in some cases there were just a handful and then suddenly dozens when a new survey came online. And for the "extreme" ones, someone will have to update it every year or so when new ones are discovered. Maybe just a short list of the first discovered ones, the named ones and a few current record holders. - Parejkoj ( talk) 14:38, 20 May 2008 (UTC)
The recent edits include a "List of superluminal quasars" - do you mean "List of quasars with apparent superluminal jet motion" or "List of quasars with apparent superluminal redshifts"? The first might be worthwhile, the second not. And the "First star later found..." and "First radio source later found..." are just going to duplicate 3C 48 and 3C 273, I think, unless you mean something different by those. Otherwise, I think this reorganization isn't too bad. Once it is cleaned up a bit, let's delete the long list at the top, and probably some of those pages as well, if this is the only thing that links to them. - Parejkoj ( talk) 15:13, 1 June 2008 (UTC)
This page lists quasars.
—Preceding unsigned comment added by 70.51.9.251 ( talk) 06:34, 7 June 2008 (UTC)
References
70.51.9.220 ( talk) 07:46, 22 June 2008 (UTC)
06:59, 28 June 2008 (UTC)
I think the 1999 z=5.02 quasar is a mistake by the source I used (acheivements by Dr. Schneider, PSU), so this section is now complete, until the next record breaker is found, or more quasars at z>6. If people have no objections, I'll remove the 1999 z=5.02 titlist and shrink the recordholder table by one entry, spanning the era 1998-2000 with the SDSS 0338 quasar to the SDSS 1204 quasar. The titleholders are otherwise complete and referenced, including which succeeded which. The only hole is the 1999 timeperiod, where I can't find any data on that particular quasar. So, now we have a history of science section with the history of the most distant quasar. 70.55.87.237 ( talk) 11:58, 22 June 2008 (UTC)
If a list of most distant quasars is created, a history list of most distant radio-loud quasars, history list of most distant radio-quiet quasars, a list of most distant radio-loud quasars, list of most distant radio-quiet quasars, list of most distant OVV, history list of most distant OVV should be built for that page. 70.55.87.237 ( talk) 11:58, 22 June 2008 (UTC)
1999 - | z=5.02 | This was not the most distant object discovered at time of discovery. It did not surpass galaxy SSA22-HCM1 (z=5.74) (discovered 1999). [1] [2] |
So does anyone know about this quasar? 70.51.9.241 ( talk) 06:52, 28 June 2008 (UTC)
I think I'm going to delete this section, since there's a great deal of contradictory information from reputable sources concering what are the nearest quasars. I'll keep the most commonly considered nearest quasar in the table of extremes though. 70.55.84.76 ( talk) 09:34, 23 June 2008 (UTC)
Rank | Quasar | Distance | Notes |
---|---|---|---|
1 | 3C 273 | z=0.158 | |
|
Quasar | Date | Distance | Notes |
---|---|---|---|
3C 273 | 1963 − current | z=0.158 | First redshift identified for a quasar. This was the most distant object discovered at the time of discovery. No other quasars are less distant than the first quasar whose redshift was measured. |
|
Ok, this is what was just removed. 70.51.9.241 ( talk) 06:37, 28 June 2008 (UTC)
References
Rank | Quasar | Date | Notes |
---|---|---|---|
1 | 3C 48 | 1960 | [1] |
These were characterized as quasars, but may or may not have had their redshifts determined at the time of their quasar determination. |
The above table was excised. It might be added back later, but I couldn't find sufficient material for it. 70.51.9.241 ( talk) 06:36, 28 June 2008 (UTC)
superluminality to integrate: [10]
70.55.84.60 ( talk) 06:45, 21 July 2008 (UTC)
I'm thinking of adding a table for a list of quasars mistaken for stars and other things, and a list of non-quasars mistaken for quasars.
Seven examples are listed at [11]
76.66.197.2 ( talk) 10:05, 16 November 2009 (UTC)
I excised these two from the top list, as the person who added it made no mention of why they should be listed. As this is not a complete list of all quasars ( WP:INDISCRIMINATE), nor it is a duplication of Category:Quasars ( WP:Duplicate), there should be a reason for listing them. -- 65.92.180.137 ( talk) 08:17, 31 March 2013 (UTC)
3C 173.1 | A radio galaxy/ quasar located in the constellation Camelopardalis. |
3C 286 | A Seyfert 1 Galaxy/ quasar at redshift 0.8493 with a radial velocity of 164,137 km/s. |
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https://arxiv.org/abs/2206.04204 says
"Discovery of the most luminous quasar of the last 9 Gyr"
"L_bol = (4.7 +/- 1.0) * 10^47 erg/s or M_i(z=2) = -29.74 mag"
I replaced 3C 273 with this one, but then discovered brightness probably is different from luminosity. Then I saw SMSS J215728.21-360215.1 listed as most luminous at -32.36 mag. I'm confused how SMSS J114447.77-430859.3 is the most luminous and reverted my edit. Darsie42 ( talk) 19:01, 15 June 2022 (UTC)
This article is rated List-class on Wikipedia's
content assessment scale. It is of interest to the following WikiProjects: | ||||||||||||||
|
This page has a workpage, see /workpage |
Text and/or other creative content from Talk:List of quasars/workpage was copied or moved into List of quasars. The former page's history now serves to provide attribution for that content in the latter page, and it must not be deleted as long as the latter page exists. |
Text and/or other creative content from List of quasars was copied or moved into List of most distant astronomical object record holders. The former page's history now serves to provide attribution for that content in the latter page, and it must not be deleted as long as the latter page exists. |
I don't see the purpose of this page. There are now some hundreds of thousands of quasars known (e.g. the SDSS has spectra of ~100,000, 2dF has ~25,000). Most of the entries on this list have very little information provided about them besides a link to NED and/or SIMBAD. Unless we have guidelines for inclusion, I think this whole page should be deleted. I'll wait a while to hear counter arguments, and then I'll make a request for deletion. - Parejkoj ( talk) 17:41, 30 April 2008 (UTC)
That would be a very difficult list to maintain. Having 10 items per is going to be difficult to keep track of, since in some cases there were just a handful and then suddenly dozens when a new survey came online. And for the "extreme" ones, someone will have to update it every year or so when new ones are discovered. Maybe just a short list of the first discovered ones, the named ones and a few current record holders. - Parejkoj ( talk) 14:38, 20 May 2008 (UTC)
The recent edits include a "List of superluminal quasars" - do you mean "List of quasars with apparent superluminal jet motion" or "List of quasars with apparent superluminal redshifts"? The first might be worthwhile, the second not. And the "First star later found..." and "First radio source later found..." are just going to duplicate 3C 48 and 3C 273, I think, unless you mean something different by those. Otherwise, I think this reorganization isn't too bad. Once it is cleaned up a bit, let's delete the long list at the top, and probably some of those pages as well, if this is the only thing that links to them. - Parejkoj ( talk) 15:13, 1 June 2008 (UTC)
This page lists quasars.
—Preceding unsigned comment added by 70.51.9.251 ( talk) 06:34, 7 June 2008 (UTC)
References
70.51.9.220 ( talk) 07:46, 22 June 2008 (UTC)
06:59, 28 June 2008 (UTC)
I think the 1999 z=5.02 quasar is a mistake by the source I used (acheivements by Dr. Schneider, PSU), so this section is now complete, until the next record breaker is found, or more quasars at z>6. If people have no objections, I'll remove the 1999 z=5.02 titlist and shrink the recordholder table by one entry, spanning the era 1998-2000 with the SDSS 0338 quasar to the SDSS 1204 quasar. The titleholders are otherwise complete and referenced, including which succeeded which. The only hole is the 1999 timeperiod, where I can't find any data on that particular quasar. So, now we have a history of science section with the history of the most distant quasar. 70.55.87.237 ( talk) 11:58, 22 June 2008 (UTC)
If a list of most distant quasars is created, a history list of most distant radio-loud quasars, history list of most distant radio-quiet quasars, a list of most distant radio-loud quasars, list of most distant radio-quiet quasars, list of most distant OVV, history list of most distant OVV should be built for that page. 70.55.87.237 ( talk) 11:58, 22 June 2008 (UTC)
1999 - | z=5.02 | This was not the most distant object discovered at time of discovery. It did not surpass galaxy SSA22-HCM1 (z=5.74) (discovered 1999). [1] [2] |
So does anyone know about this quasar? 70.51.9.241 ( talk) 06:52, 28 June 2008 (UTC)
I think I'm going to delete this section, since there's a great deal of contradictory information from reputable sources concering what are the nearest quasars. I'll keep the most commonly considered nearest quasar in the table of extremes though. 70.55.84.76 ( talk) 09:34, 23 June 2008 (UTC)
Rank | Quasar | Distance | Notes |
---|---|---|---|
1 | 3C 273 | z=0.158 | |
|
Quasar | Date | Distance | Notes |
---|---|---|---|
3C 273 | 1963 − current | z=0.158 | First redshift identified for a quasar. This was the most distant object discovered at the time of discovery. No other quasars are less distant than the first quasar whose redshift was measured. |
|
Ok, this is what was just removed. 70.51.9.241 ( talk) 06:37, 28 June 2008 (UTC)
References
Rank | Quasar | Date | Notes |
---|---|---|---|
1 | 3C 48 | 1960 | [1] |
These were characterized as quasars, but may or may not have had their redshifts determined at the time of their quasar determination. |
The above table was excised. It might be added back later, but I couldn't find sufficient material for it. 70.51.9.241 ( talk) 06:36, 28 June 2008 (UTC)
superluminality to integrate: [10]
70.55.84.60 ( talk) 06:45, 21 July 2008 (UTC)
I'm thinking of adding a table for a list of quasars mistaken for stars and other things, and a list of non-quasars mistaken for quasars.
Seven examples are listed at [11]
76.66.197.2 ( talk) 10:05, 16 November 2009 (UTC)
I excised these two from the top list, as the person who added it made no mention of why they should be listed. As this is not a complete list of all quasars ( WP:INDISCRIMINATE), nor it is a duplication of Category:Quasars ( WP:Duplicate), there should be a reason for listing them. -- 65.92.180.137 ( talk) 08:17, 31 March 2013 (UTC)
3C 173.1 | A radio galaxy/ quasar located in the constellation Camelopardalis. |
3C 286 | A Seyfert 1 Galaxy/ quasar at redshift 0.8493 with a radial velocity of 164,137 km/s. |
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https://arxiv.org/abs/2206.04204 says
"Discovery of the most luminous quasar of the last 9 Gyr"
"L_bol = (4.7 +/- 1.0) * 10^47 erg/s or M_i(z=2) = -29.74 mag"
I replaced 3C 273 with this one, but then discovered brightness probably is different from luminosity. Then I saw SMSS J215728.21-360215.1 listed as most luminous at -32.36 mag. I'm confused how SMSS J114447.77-430859.3 is the most luminous and reverted my edit. Darsie42 ( talk) 19:01, 15 June 2022 (UTC)