NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-05-25 T21:56:54 PDT
Help | Comment | NED Home

For refcode 2003AJ....125..555D:
Retrieve 50 NED objects in this reference.
Please click here for ADS abstract

NED Abstract

Copyright by American Astronomical Society. Reproduced by permission
2003AJ....125..555D MULTIWAVELENGTH INSIGHTS INTO MIXED-MORPHOLOGY BINARY GALAXIES. I. ISOCAM, ISOPHOT, AND H{alpha} IMAGING DONOVAN L. DOMINGUE Department of Chemistry and Physics, CBX 082, Georgia College and State University, Milledgeville, GA 31061; domingue@gcsu.edu JACK W. SULENTIC Department of Physics and Astronomy, University of Alabama, Box 870324, Tuscaloosa, AL 35487; giacomo@merlot.astr.ua.edu CONG XU, JOSEPH MAZZARELLA, AND YU GAO Infrared Processing and Analysis Center, Jet Propulsion Laboratory, Mail Stop 100-22, California Institute of Technology, Pasadena, CA 91125; cxu@ipac.caltech.edu; mazz@ipac.caltech.edu, gao@ipac.caltech.edu AND ROBERTO RAMPAZZO Osservatorio Astronomica di Padova, INAF, vicolo dell'Osservatorio 5, I-35122 Padova, Italy; rampazzo@brera.mi.astro.it Received 2002 July 3; accepted 2002 October 18 ABSTRACT We present H{alpha} and ISO mid- and far-IR observations for a sample of mixed-morphology galaxy pairs that reveal both the stellar and nonstellar signatures of the interaction process. A mixed-morphology pair is perhaps the simplest form of galaxy-galaxy interaction because it is expected to involve only a single rapidly rotating gas-rich component paired with a gas-poor elliptical or lenticular galaxy. A primary assumption that we address is whether spirals are the only IR emitter in these mixed (E+S) pairs. Our observations reveal that many of the early-type galaxies exhibit weak (low equivalent width) emission, as often observed in field elliptical galaxies. These are the classical mixed-morphology pairs. However, some of the early-type components, especially the lenticular galaxies, show evidence for significant star formation, with H{alpha} equivalent widths and 15 micron luminosities comparable to or exceeding those of their often much larger spiral companions. Our sample contains five Seyfert 2 nuclei, of which three can be described as companions on the end of a spiral arm. The Seyfert nucleus is often accompanied by a starburst region, while other such companions currently show only the starburst component. These pairs are among the best candidates for direct interaction fuelling of both starbursts and active galactic nuclei. Key words: galaxies: elliptical and lenticular, cD - galaxies: ISM - galaxies: photometry - galaxies: spiral
Retrieve 50 NED objects in this reference.
Please click here for ADS abstract

Back to NED Home