Author Topic: Weirdest Spectra  (Read 47274 times)

sdrew123

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Weirdest Spectra
« on: September 03, 2011, 07:00:52 pm »
The idea here is to collect the wide range of objects with unusual spectra that have been posted in various threads. Whereas the 'Bad chart thread' has already been established to address instances of 'bad' spectra (SDSS data reduction pipeline going haywire), this is the place to post instances of 'good' spectra that deviate from the typical variety.

Here are some examples:

sdrew123

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Re: Weirdest Spectra
« Reply #1 on: September 03, 2011, 07:13:37 pm »
Object: 3C 332 http://cas.sdss.org/astro/en/tools/explore/obj.asp?id=588018054588137497
Why weird?: multiple Hβ and Hα components having different redshifts.




sdrew123

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Re: Weirdest Spectra
« Reply #2 on: September 03, 2011, 07:34:51 pm »
Object: http://cas.sdss.org/dr7/en/tools/explore/obj.asp?id=587735667455361116
Why weird?: triple [O III] lines???




zoom-in on the [O III] lines is attached (hopefully).

sdrew123

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Re: Weirdest Spectra
« Reply #3 on: September 03, 2011, 07:43:29 pm »
Object: [HB89] 1321+058 http://cas.sdss.org/astro/en/tools/explore/obj.asp?id=587729160042905649
Why weird?: double or triple [O III] and Hβ



sdrew123

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Re: Weirdest Spectra
« Reply #4 on: September 03, 2011, 07:47:45 pm »
Object: http://cas.sdss.org/dr7/en/tools/explore/obj.asp?id=587739115781816390
Why weird?: double or triple [O III] and Hβ



sdrew123

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Re: Weirdest Spectra
« Reply #5 on: September 03, 2011, 07:54:26 pm »
Object: http://cas.sdss.org/astro/en/tools/explore/obj.asp?id=587726015083380872
Why weird?: velocity offset between broad and narrow permitted lines.



sdrew123

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Re: Weirdest Spectra
« Reply #6 on: September 03, 2011, 07:57:38 pm »
Object: http://cas.sdss.org/dr7/en/tools/explore/obj.asp?id=587730022261129248
Why weird?: double permitted lines with velocity offset.



sdrew123

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Re: Weirdest Spectra
« Reply #7 on: September 03, 2011, 08:01:47 pm »
Object: http://cas.sdss.org/astro/en/tools/explore/obj.asp?id=588015510347841593
Why weird?: broad lines offset from narrow lines



sdrew123

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Re: Weirdest Spectra
« Reply #8 on: September 03, 2011, 08:08:56 pm »
Object: http://cas.sdss.org/dr7/en/tools/explore/obj.asp?id=587738616486166564
Why weird?: velocity offset between broad and narrow components.



sdrew123

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Re: Weirdest Spectra
« Reply #9 on: September 03, 2011, 08:16:50 pm »
Object: [HB89] 1255+356 http://cas.sdss.org/dr7/en/tools/explore/obj.asp?id=587739304757297226
Why weird?: extremely broad Hα and Hβ offset from narrow



sdrew123

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Re: Weirdest Spectra
« Reply #10 on: September 03, 2011, 08:23:47 pm »
Object: http://cas.sdss.org/dr7/en/tools/explore/obj.asp?id=587735661550108734
Why weird?: five sets of [O III] lines (see attachment)



RandyC

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Re: Weirdest Spectra
« Reply #11 on: September 03, 2011, 08:32:40 pm »
Nice work, you might check thread Quasi-Stellar radio sources. Find a Quasar? Post it here! for more ideas.
Randy

sdrew123

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Re: Weirdest Spectra
« Reply #12 on: September 03, 2011, 09:05:13 pm »
Good advice indeed... I picked out many of these (and more to come) from the quasar/pea/AGN threads. Most if not all of what I post here will be re-posts. I'm not trying to rain on anybody's parade or prove anything, I just enjoy looking at and theorizing about the weirder spectra. On the other hand, I grew weary enough of perusing long threads like the Pea/Quasar threads that I decided it would worthwhile to try and get people to re-post the weird spectra here.

BTW, the spectra I've posted so far obviously have a rather singular theme - multiple, offset sets of emission lines. These 'double-peaked emitters' are currently a hot topic in astronomy research due to the fact that, in some cases, they may be the result of binary AGN. In my opinion, the only thing better than a galaxy with an active SMBH is a galaxy with 2 active SMBH's! Some relavant papers are linked below.

- http://arxiv.org/abs/1107.3564 (The Nature of Double-Peaked [O III] Active Galactic Nuclei)
- http://arxiv.org/abs/1011.5246 (Type 2 Active Galactic Nuclei with Double-Peaked [OIII] Lines...)
- http://arxiv.org/abs/1009.0767 (Mergers in Double-Peaked [O III] Active Galactic Nuclei)
- http://arxiv.org/abs/1008.2221 (Unusual Double-peaked Emission in the SDSS Quasar J093201.60+031858.7)
- http://arxiv.org/abs/1011.4213 (HST Observations of the Double-Peaked Emission Lines in the Seyfert Galaxy Markarian 78: Mass Outflows from a Single AGN)
- http://arxiv.org/abs/1102.1733 (Adaptive Optics Imaging of QSOs with Double-Peaked Narrow Lines: Are they Dual AGNs?)

c_cld

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Re: Weirdest Spectra
« Reply #13 on: September 03, 2011, 09:07:44 pm »
1237662683609169926
arXiv:1011.3365v1  The quasar SDSS J142507.32+323137.4 : dual AGNs?
Quote from: Zhixin Peng
..We suggest this QSO might be a dual AGN system, the broad H{\beta} emission line is mainly contributed by the primary black hole (traced by the blue component) while the broad H{\beta} component of the secondary black hole (traced by the red component) is hard to be separated out considering a resolution of ~2000 of SDSS spectra or it is totally obscured by the dusty torus.




Alice

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Re: Weirdest Spectra
« Reply #14 on: September 03, 2011, 09:11:26 pm »
Good to see more of you here, sdrew :)