Author Topic: Redshift of Hubble galaxies, with spectra  (Read 47189 times)

swengineer

  • Sr. Member
  • ****
  • Posts: 312
    • View Profile
Re: Redshift of Hubble galaxies, with spectra
« Reply #30 on: July 13, 2010, 08:55:13 pm »
It is going to be hard to correlate the colour of the image with the spectrum, since the spectrum is so short.

Here is a possible Hubble pea with an OII peak
http://tkserver.keck.hawaii.edu/egs/dataAccess/notebook/egs_notebook.php?serial=12007954
http://tkserver.keck.hawaii.edu/egs/egs_data/postage/prettystamps/12007954.jpg




Budgieye,

I like your above mapping of the spectrum to the approximate filter bandwidths.   8)  That helps me "see" the connection between the spectra and the image.

From my revised version of your OII / OIII chart:
Quote
(redshift) 1.1   OII peak off chart?, no peaks, just a flat chart, object will be a dim white  (F606 sees nothing now.  F814 or F850 now seeing the OII peak?  So perhaps a strong orange-yellow). 

The object in question here seems to fit the z = 1.1 --> strong OII peak --> strong orange-yellow Hubble image (w/ data only for F606 & F814) model.   ;D

I expect most folks have figured this out, but in case not, the AEGIS java spectrum applet has some useful user controls.  Here's the same data "zoomed in" and with the peaks assigned (at least where peaks align with assignments). So we have a strong O_II emission peak at ~8000A (observed), smaller Ne_III and Ne V emission peaks, a weak (and broad?) H delta emission peak at ~8800A, strong (unlabeled) adsorption peaks at ~7600 and ~7800A, and moderate adsorption peaks for K and H at ~ 8500A.  I don't know much yet about translating this into a better description of the target object / galaxy.  But for those in the know, maybe this helps.

-Mark

Budgieye

  • Hero Member
  • *****
  • Posts: 3860
    • View Profile
Re: Redshift of Hubble galaxies, with spectra
« Reply #31 on: July 17, 2010, 06:36:42 am »

Budgieye

  • Hero Member
  • *****
  • Posts: 3860
    • View Profile
Re: Redshift of Hubble galaxies, with spectra
« Reply #32 on: July 18, 2010, 12:15:54 pm »
I have made another attempt at guessing the colour and spectrum of peas, on p 1

http://www.galaxyzooforum.org/index.php?topic=277967.msg476366#msg47636

c_cld

  • Hero Member
  • *****
  • Posts: 4948
  • "In some fields, I am at home; in others we are fellow tourists" (Bill )
    • View Profile
Re: Redshift of Hubble galaxies, with spectra
« Reply #33 on: July 19, 2010, 03:56:38 pm »
aegis objno 12012461 ra 14:17:19.30 dec 52:32:55.08 z 0.168258  aegis spectrum
587735694840758568 SDSS J141719.30+523255.1

c_cld

  • Hero Member
  • *****
  • Posts: 4948
  • "In some fields, I am at home; in others we are fellow tourists" (Bill )
    • View Profile
Re: Redshift of Hubble galaxies, with spectra
« Reply #34 on: July 19, 2010, 04:02:27 pm »
Aegis OBJNO 12012517 ra 14:17:19.67 dec 52:32:37.62  z 0.23833
587735694840758463 SDSS J141719.67+523237.5

c_cld

  • Hero Member
  • *****
  • Posts: 4948
  • "In some fields, I am at home; in others we are fellow tourists" (Bill )
    • View Profile
Re: Redshift of Hubble galaxies, with spectra
« Reply #35 on: July 19, 2010, 04:08:55 pm »
Aegis OBJNO 13004728 ra 14:18:55.64 dec52:49:27.70 z 0.26350
587735695377629862 SDSS J141855.64+524927.6
 
SpecObjID = 373462440039415808

c_cld

  • Hero Member
  • *****
  • Posts: 4948
  • "In some fields, I am at home; in others we are fellow tourists" (Bill )
    • View Profile
Re: Redshift of Hubble galaxies, with spectra
« Reply #36 on: July 19, 2010, 04:24:37 pm »
Aegis OBJNO 13025514 ra 14:20:33.39 dec 52:58:00.75 z 0.56992
587735665306763897 SDSS J142033.37+525800.8
 
SpecObjID = 373462439875837952


redshift and spectrum different in Aegis from SDSS; don't know which is which of the two objects, or a blend in SDSS ?

c_cld

  • Hero Member
  • *****
  • Posts: 4948
  • "In some fields, I am at home; in others we are fellow tourists" (Bill )
    • View Profile
Re: Redshift of Hubble galaxies, with spectra
« Reply #37 on: July 19, 2010, 04:31:45 pm »
Aegis OBJNO 13042313 ra 14:20:41.18 dec 53:06:50.18 z 0.20040
587735665306763397 SDSS J142041.17+530650.1
 
SpecObjID = 373462439871643648



c_cld

  • Hero Member
  • *****
  • Posts: 4948
  • "In some fields, I am at home; in others we are fellow tourists" (Bill )
    • View Profile
Re: Redshift of Hubble galaxies, with spectra
« Reply #38 on: July 19, 2010, 04:46:44 pm »
Aegis OBJNO 13058191 ra 14:20:56.85 dec 53:13:07.46 z 0.74234
587735695914565739 SDSS J142056.85+531307.4

SpecObjID = 373462439909392384

spectrum looks different in Aegis?

c_cld

  • Hero Member
  • *****
  • Posts: 4948
  • "In some fields, I am at home; in others we are fellow tourists" (Bill )
    • View Profile
Re: Redshift of Hubble galaxies, with spectra
« Reply #39 on: July 19, 2010, 05:47:56 pm »
13041629 ra 14:21:16.68 dec 53:06:07.24 z 1.32744
587735665306829016 SDSS J142116.67+530607.2

c_cld

  • Hero Member
  • *****
  • Posts: 4948
  • "In some fields, I am at home; in others we are fellow tourists" (Bill )
    • View Profile
Re: Redshift of Hubble galaxies, with spectra
« Reply #40 on: July 19, 2010, 06:14:20 pm »
13032337 ra 14:21:18.42 dec 53:03:28.97 z 0.97399
587735665306829266 SDSS J142118.42+530328.9

in NED Classifications: NLAGN


c_cld

  • Hero Member
  • *****
  • Posts: 4948
  • "In some fields, I am at home; in others we are fellow tourists" (Bill )
    • View Profile
Re: Redshift of Hubble galaxies, with spectra
« Reply #41 on: July 19, 2010, 06:21:23 pm »
star
13051259 ra 14:20:24.60 dec 53:08:22.96 z 0.00365

c_cld

  • Hero Member
  • *****
  • Posts: 4948
  • "In some fields, I am at home; in others we are fellow tourists" (Bill )
    • View Profile
Re: Redshift of Hubble galaxies, with spectra
« Reply #42 on: July 19, 2010, 06:52:19 pm »
QSO - AGN
13058207 ra 14:21:13.26 dec 53:12:18.62 z 1.94965
587735695914565781

c_cld

  • Hero Member
  • *****
  • Posts: 4948
  • "In some fields, I am at home; in others we are fellow tourists" (Bill )
    • View Profile
Re: Redshift of Hubble galaxies, with spectra
« Reply #43 on: July 19, 2010, 07:16:16 pm »
13040909 ra 14:21:29.42 dec 53:05:48.60 z 1.18275

587735695914631314
in NED Classifications:  AGN 
pea? but miss the ugriz cut ; strong emission lines Ne V, O II, Ne III; absorption H eta, K, H
can't interpret, needs expert...

c_cld

  • Hero Member
  • *****
  • Posts: 4948
  • "In some fields, I am at home; in others we are fellow tourists" (Bill )
    • View Profile
Re: Redshift of Hubble galaxies, with spectra
« Reply #44 on: July 19, 2010, 07:34:28 pm »
http://www.galaxyzooforum.org/index.php?topic=277621.msg467635#msg467635
in NED classifications: AGN
13056934 ra 14:21:41.93 dec 53:10:47.34 z 1.41770 

587735695914631442