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Hubble Space Telescope photometry of the central regions of Virgo cluster elliptical galaxies. 2: Isophote shapesThe isophotal shapes of a magnitude limited sample of Virgo ellipticals are presented. These are derived from high resolution Hubble Space Telescope (HST) photometry. The absence of atmospheric seeing and accurate knowledge of the Point Spread Function (PSF) allows us to perform an accurate deconvolution. Model galaxies were constructed to test the deconvolution algorithms used, and showed that we can accurately recover isophotal shape parameters down to 0.5 sec. From the isophotal parameters we can classify the galaxies in two subsamples: disky and non-disky galaxies. In three of these disky galaxies we found evidence for a nuclear stellar disk in the inner 1.5 sec. In addition these galaxies also have an outer disk, that seems to break up inside 2 sec - 3 sec. In the two galaxies for which there is kinematic evidence from the literature of a decoupled core, we found no indication for such subsystem from the isophotal shape analysis. In 80% of these early type galaxies there are indications for dust. For eight of these galaxies the dust has not been detected before.
Document ID
19950033912
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Bosch, Frank C. Van Den
(Leiden Observatory Leiden, Netherlands)
Ferrarese, Laura
(Johns Hopkins University Baltimore, MD, United States)
Jaffe, Walter
(Leiden Observatory Leiden, Netherlands)
Ford, Holland C.
(Johns Hopkins University Baltimore, MD, United States)
O'Connell, Robert W.
(University of Virginia, Charlottesville, VA United States)
Date Acquired
August 16, 2013
Publication Date
November 1, 1994
Publication Information
Publication: The Astronomical Journal
Volume: 108
Issue: 5
ISSN: 0004-6256
Subject Category
Astronomy
Accession Number
95A65511
Funding Number(s)
CONTRACT_GRANT: NAGW-2596
CONTRACT_GRANT: NATO-573373
CONTRACT_GRANT: ASTRON-782-373-055
Distribution Limits
Public
Copyright
Other

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