Re: Hbeta ?

From: Gaston Folatelli (gaston@physto.se)
Date: Sun Nov 10 2002 - 23:18:21 PST

  • Next message: Saul Perlmutter: "I've added a few more candidates to the list so we have more bright ones..."

    Putting all the pieces of information together:
    - no identifications find these two lines at the same z
    - the shape of 9179AA is that of a disk galaxy
    - the shape of 8263AA is different

    Í still think these may be two objects on the same line of sight.
    We don't see a SN, anyway.

    Gastón

    On Mon, 11 Nov 2002 clidman@eso.org wrote:

    > Hi Lifan,
    > The 2D FORS2 spectrum is available from http://www.sc.eso.org/~clidman/.
    >
    > The line at 9178 is complex.
    >
    > Cheers, Chris.
    >
    > Lifan Wang wrote:
    >
    > > Mamoru,
    > >
    > > On Keck spectrum, it seems the 9178 A is resolved into a doublet
    > > with split being consistent with [O II] identification.
    > >
    > > Lifan
    > > > From owner-deepnews@listserv.lbl.gov Sun Nov 10 20:51:04 2002
    > > > X-Authentication-Warning: listserv.lbl.gov: majordom set sender to owner-deepnews@listserv.lbl.gov using -f
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    > > > To: deepnews@lbl.gov
    > > > Subject: Re: Lifan thinks we see the other NeV line for 026, implying
    > > > it's an AGN
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    > > >
    > > > Hi,
    > > >
    > > > I don't see NeV3426 at ~8430A on VLT spectrum.
    > > > Plobably in the Keck spectrum?
    > > >
    > > > Though I understand that this is not
    > > > a straight explanation, but how about the
    > > > following combinations?
    > > >
    > > > 9179 Hbeta(4863-4853)
    > > > 8263 Hgamma(4342-4346)
    > > > at z=0.90
    > > >
    > > > The latter wavelengths are from SDSS composite QSO
    > > > spectra (D.Vanden Berk et al. AJ, 122, 549-564, 2001)
    > > > I got this idea from Fig.6 of this paper
    > > > when I tried to fit those two lines with
    > > > SiIV and CIV (at z=4.92).
    > > >
    > > > The lines are not broad very much,
    > > > but the line at 9179 seems to me slightly
    > > > larger than velocity rotation/dispersion
    > > > of usual galaxies. There might be weak
    > > > broad-line components in this galaxy.
    > > >
    > > > The both photo-z codes give z=0.8 for this galaxy.
    > > >
    > > > Do we see [OIII] at 9510? Mmm...
    > > >
    > > > -Mamoru
    > > >
    > > > >Lifan thinks we see the other NeV line (restframe 3426 A) for 026,
    > > > >implying it is, in fact, an AGN, as we were suspecting. This also fits
    > > > >the fact that it is too bright for its redshift (z = 1.46) if were a
    > > > >normal SN Ia.
    > > >
    > > >
    > > >
    > > > Mamoru Doi
    > > > Institute of Astronomy
    > > > School of Science
    > > > University of Tokyo
    > > > voice +81-422-34-5084
    > > > fax. +81-422-34-5041
    > > > doi@ioa.s.u-tokyo.ac.jp
    > > >
    >

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