NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-03-22 T02:59:08 PDT
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For refcode 2005A&A...429..819M:
Retrieve 117 NED objects in this reference.
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Copyright by European Southern Observatory (ESO). Reproduced by permission
2005A&A...429..819M Peculiarities and populations in elliptical galaxies II. Visual-near IR colours as population indices R. Michard Received 11 June 2004 / Accepted 6 August 2004 As a complement to the data collected and discussed in Paper I of this series, 2MASS near-IR images have been used, in connection with available V light aperture photometry, to derive the colours V-J, V-K, J-H and J-K within the effective aperture A_e_: nearly the same complete sample of 110 E-type galaxies is treated. In Paper I these were classified, based on morphological criteria, into the "peculiar" (or Pec) and "normal" (or Nop) subsamples. For the Nop subsample, the derived colour indices are tightly related to the galaxy masses, as measured by the central velocity dispersion {sigma}_0_, although with rather small slopes as regards J-H and J-K. For the Pec subsample, the V-J and V-K colours behave as UBV and line-indices: part of the objects show blue residuals from the appropriate colour- {sigma}_0_ regression, which is evidence of a younger population mixed with the "normal" one traced by the Nop regressions; the other shows no deviations from the Nop subsample. The distinction among Pec objects between the YP family (NGC 2865 type), and the NP one (NGC 3923 type), is statistically supported, and generally confirmed in specific cases. Keywords: galaxies: elliptical and lenticulars, cD, galaxies: photometry
Retrieve 117 NED objects in this reference.
Please click here for ADS abstract

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