NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-05-21 T17:52:47 PDT
Help | Comment | NED Home

For refcode 2001AJ....122.2341I:
Retrieve 365 NED objects in this reference.
Please click here for ADS abstract

NED Abstract

Copyright by American Astronomical Society. Reproduced by permission
2001AJ....122.2341I HIGH AND LOW SURFACE BRIGHTNESS GALAXIES IN THE LOCAL UNIVERSE. IV. OPTICAL AND 21 CENTIMETER SPECTROSCOPY CHRIS IMPEY AND VALORIE BURKHOLDER Steward Observatory, University of Arizona, 933 North Cherry Avenue, Tucson, AZ 85721; cimpey@as.arizona.edu; veburkholder@west.raytheon.com AND DAVID SPRAYBERRY W. M. Keck Observatory, 65-1120 Mamalahoa Highway, Kamuela, HI 96743; dsprayberry@keck.hawaii.edu Received 2001 April 18; accepted 2001 July 25 ABSTRACT We present flux-calibrated spectra in the range 3500 to 8000 A for the nuclear regions of 250 galaxies and H I 21 cm line profiles for 238 galaxies selected from the catalog of low surface brightness galaxies identified in Automated Plate Measuring Facility (APM) scans of UK Schmidt Telescope survey plates. For the optical spectra, common nebular absorption- and emission-line equivalent widths and emission-line fluxes were measured with typical errors of about 20%. H I mass and velocity widths were measured from the 21 cm line emission, with 15% accuracy. Galaxies in this study span over 6 mag in surface brightness. Only about 20% of these galaxies show spectroscopic evidence of active galactic nuclei. Derived quantities such as synthetic colors, metallicity, star formation rate, the ratio of neutral hydrogen mass to blue light, and gas mass fraction are presented in a companion paper. Key words: galaxies: abundances - galaxies: fundamental parameters - galaxies: general - galaxies: ISM - galaxies: nuclei - galaxies: stellar content
Retrieve 365 NED objects in this reference.
Please click here for ADS abstract

Back to NED Home