Re: uniqueness of cluster ellipticals

From: Lori Lubin (lubin@physics.ucdavis.edu)
Date: Tue Jan 24 2006 - 16:42:27 PST

  • Next message: Marc Postman: "Re: uniqueness of cluster ellipticals"

    We have not quantified it entirely, but based on the first look, we also
    see a higher fraction in the field.

    Cheers,
            Lori

    On Tue, 24 Jan 2006, Marc Postman wrote:

    > Yes true - do you also see a higher fraction of [OII} emission for
    > ellipticals not in the cluster but at those same redshifts? I believe
    > we saw some evidence for this in Postman, Lubin, Oke 2001.
    >
    > On Jan 24, 2006, at 4:00 PM, Lori Lubin wrote:
    >
    > > Hi Marc,
    > >
    > > That is very interesting. It should be noted (though probably not in
    > > this proposal) that about 60% of the spectroscopically-confirmed
    > > red-sequence galaxies in the ACS field of CL1604+4304 at z = 0.9 show
    > > detectable [OII] emission in our DEIMOS spectra. This suggests at
    > > least some star formation in the cluster early-types at these
    > > redshifts. it is important to get high S/N and
    > > high-spectral-resolution spectroscopy to quantify this accurately.
    > >
    > > Cheers,
    > > Lori
    > >
    > -----------------------------------------------------------------
    > Marc Postman Email: postman@stsci.edu
    > STScI - CMO Phone: +1-410-338-4340
    > 3700 San Martin Drive Fax: +1-410-338-4424
    > Baltimore, MD 21218 U.S.A. http://www.stsci.edu/~postman
    >

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