Author Topic: "Quasars with jets?" OR "Stars"?  (Read 3803 times)

zutopian

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"Quasars with jets?" OR "Stars"?
« on: December 23, 2011, 08:58:24 pm »
I found objects, which reminded me of the Quasar, which was OOTD on 27th December 2008:

OOTD:
Quote
3C273’s jet is right underneath it at around four o clock, the jet is 62 kilo parsecs, wich is twice the size of the milky way

3C273 :

587726014535237707



http://www.galaxyzooforum.org/index.php?topic=273507.0

Here are my objects:
The first one might be an overlap "Star/edge-on galaxy". The 2nd and 3rd objects are next to it: Looks as if they have faint "jets".
http://skyserver.sdss3.org/dr8/en/tools/explore/obj.asp?id=1237655748306927711
http://skyserver.sdss3.org/dr8/en/tools/explore/obj.asp?id=1237656563817250928
http://skyserver.sdss3.org/dr8/en/tools/explore/obj.asp?id=1237656563817251106


zutopian

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zookeeperKevin

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Re: "Quasars with jets?" OR "Stars"?
« Reply #2 on: December 26, 2011, 07:21:23 pm »
Those look more like randomly aligned background galaxies...



Mjtbarrett

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« Last Edit: March 22, 2013, 10:30:52 am by Mjtbarrett »

zutopian

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Re: "Quasars with jets?" OR "Stars"?
« Reply #6 on: October 24, 2013, 01:44:27 pm »
The following one has a spectrum. The redshift is z=1.858, zErr=0.00034. :


http://skyserver.sdss3.org/dr8/en/tools/quicklook/quickobj.asp?id=1237658918534774821


« Last Edit: October 24, 2013, 03:08:56 pm by zutopian »

planetaryscience

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Re: "Quasars with jets?" OR "Stars"?
« Reply #7 on: October 24, 2013, 01:53:28 pm »
Interesting....

Have you noticed how Quasars have very different spectrums?







I like to find asteroids and galaxy mergers- but all galaxies are still fine to me.

fatha731

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Re: "Quasars with jets?" OR "Stars"?
« Reply #8 on: October 24, 2013, 02:10:18 pm »
I think it depends on the redshift (among others).

zutopian

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Re: "Quasars with jets?" OR "Stars"?
« Reply #9 on: October 24, 2013, 03:17:10 pm »
The one, which I posted today looks like a star and the spectrum looks also like a star spectrum. Well, I am not familiar with spectra. I don't know, if there are QSO spectra, which look like that. The redshift is wrong, because QSOs with z=1.8 don't look like the one, which I posted. Stars have z=0.
It might be a special star and DR8 was therefore confused and wrongly stated, that is a QSO, z=1.8.

http://skyserver.sdss3.org/dr8/en/tools/explore/obj.asp?id=1237658918534774821
« Last Edit: October 24, 2013, 03:30:11 pm by zutopian »

zutopian

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Re: "Quasars with jets?" OR "Stars"?
« Reply #10 on: October 24, 2013, 06:00:08 pm »
When two become one: an apparent QSO pair turns out to be a single quasar
Guido Cupani, Stefano Cristiani, Valentina D'Odorico, Bo Milvang-Jensen, Jens-Kristian Krogager
Quote
We report on our serendipitous discovery that the objects Q 01323-4037 and Q 0132-4037, listed in the V\'eron-Cetty & V\'eron catalog (2006) as two different quasars, are actually a quasar and a star. We briefly discuss the origin of the misidentification, and provide a refined measurement of the quasar redshift
(Submitted on 14 Mar 2011)
http://arxiv.org/abs/1103.2737

c_cld

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Re: "Quasars with jets?" OR "Stars"?
« Reply #11 on: October 25, 2013, 08:04:11 pm »
Reminder  of
Redshift Gallery: Quasars
Quote
The following table shows how quasars at different redshifts appear to us, both photometrically and spectroscopically. The redshift (z) of each quasar is listed in the leftmost column.

(This page is image-intensive; please be patient. Page courtesy of Mark Subbarao, University of Chicago)

sample








SDSS Image Usage Policy courtesy to the Sloan Digital Sky Survey   :D