NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-03-22 T03:09:26 PDT
Help | Comment | NED Home

For refcode 1996AJ....111.1566P:
Retrieve 20 NED objects in this reference.
Please click here for ADS abstract

NED Abstract

Copyright by American Astronomical Society. Reproduced by permission
1996AJ....111.1566P NUCLEI OF NEARBY DISK GALAXIES. I. A HUBBLE SPACE TELESCOPE IMAGING SURVEY ANDREW C. PHILLIPS AND GARTH D. ILLINGWORTH UCO/Lick Observatory. University of California, Santa Cruz, California 95064 Electronic mail: phillips@ucolick.org, gdi@ucolick.org JOHN W. MACKENTY Space Telescope Science Institute. 3700 San Martin Drive, Baltimore, Maryland 21218 Electronic mail: mackenty@stsci.edu MARIJN FRANX Kapteyn Astronomical institute, Postbus 800, NL-9700 AV Groningen, Netherlands Electronic mail: franx@astro.rug.nl Received 1995 October 31; revised 1995 December 18 ABSTRACT We present deconvolved images of the central regions of 20 nearby disk galaxies, obtained with the original Planetary Camera of the Hubble Space Telescope. The galaxies span a range in Hubble type from S0 to Sm. We have measured surface brightness profiles, and inverted these to estimate luminosity-density profiles. Surface brightness profiles in the central regions show a variety of forms, sometimes clearly affected by heavy dust obscuration. All galaxies in the sample earlier than type Sc show a continuing rise in surface brightness up to the resolution limit in the deconvolved images. Later types show shallower slopes, consistent with exponential disks either continuing into the center or else flattening in the central regions. These galaxies often, but not always, exhibit an unresolved nucleus which is likely a dense nuclear star cluster. Luminosity densities in the earlier-type galaxies reach or exceed 10^4^ L_sun_,V_ pc^-3^, and the nuclei of the later-type galaxies occasionally approach the same level. The dS0 galaxies in our sample have central characteristics most closely resembling the late-type galaxies. A comparison of the central luminosity and central surface brightness of our galaxies with elliptical galaxies and nucleated dwarfs supports an association of late-type disks systems and such dwarfs.
Retrieve 20 NED objects in this reference.
Please click here for ADS abstract

Back to NED Home