Re: Lifan thinks we see the other NeV line for 026, implyingit's an AGN

From: clidman@eso.org
Date: Mon Nov 11 2002 - 08:48:19 PST

  • Next message: Lifan Wang: "Hbeta ?"

    Dear Mamoru,
      This is close, but probably not close enough. The inferred redshifts would be
    0.904 for H_gamma and 0.888 for H_beta. The difference is larger that the error,
    which is usually at the 0.001 level or less.

    Cheers, Chris.

    Mamoru Doi wrote:

    > 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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