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A MULTI-WAVELENGTH ATLAS FOR STRUCTURAL AND STELLAR POPULATION
STUDIES OF VIRGO GALAXIES Surface Brightness Profiles and
Bulge-Disk Decompositions for 286 Virgo Cluster Galaxies
Authors: Michael McDonald, Stéphane Courteau and Brent Tully
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This database contains surface brightness profiles in the optical g,
r, i, z bands and near-IR H-band for 286 Virgo cluster galaxies. This
morphologically-complete sample spans a wide range in galaxy size,
luminosity, surface brightness and stellar populations. These data
have been used to study the luminosity and surface brightness
distribution of Virgo cluster galaxies,
in McDonald
et al. 2009. We find compelling evidence for bimodal populations
in surface brightness, with both early- and late-type galaxies having
a dearth of intermediate surface brightness galaxies. Most convincing
is our confirmation of the result by Tully and Verheijen (1997) that
the surface brightness of galaxy disks is strongly bimodal.
The near-IR H-band data have been obtained from a variety of
telescopes. We downloaded archival images for 31/286 and 84/286 bright
galaxies from
the 2MASS
and GOLDMine online
databases, respectively. The remaining 171 galaxies have new
observations from the UH 2.2-m (130/286), CFHT (20/286) and UKIRT
(21/286) telescopes. The optical griz images were all obtained
from the SDSS archives.
Surface brightness profiles were extracted homogeneously from
the optical and near-IR data following similar procedures, as
outlined in our data paper (McDonald et al. 2011).
In addition to the calibrated surface brightness profiles, we provide
the bulge-disk decomposition results for all (286×5) 1,430
grizH surface brightness profiles. Our one-dimensional profile
decompositions assume a generalized Sersic function for the bulge
light profile and a simple exponential for the disk light, as described
in McDonald
et al. (2009). Our decompositions also account for the presence
atmospheric blurring, galaxy nuclei, and spiral arms. For further
discussion of these methods, see the aforementioned paper.
The user can access these surface brightness profiles below, either
individually or by downloading the complete sample in all five
grizH bands. The results of the one-dimensional bulge-disk
decompositions are provided in a separate table. Finally,
we caution about the limitations of our data at the bottom
of this page.
These data are made available to the community for public use.
We suggest the following acknowledgements in your papers:
"This research has made use of the Virgo cluster galaxy
database of McDonald et al. (2011)."
Main references:
- McDonald, M. et al, 2011, MNRAS, 414, 2055 - Surface brightness profiles
- McDonald, M. et al, 2009, MNRAS, 394, 2022M - Sample definition, structural results
- McDonald, M. et al, 2009, MNRAS, 393, 628M - Bulge-disk decompositions
For more questions, or comments, about the database, please contact
Michael McDonald or Stéphane Courteau.
We would also appreciate new references of papers using these data.