NASA/IPAC EXTRAGALACTIC DATABASE
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For refcode 1995ApJS...98..369B:
Retrieve 1374 NED objects in this reference.
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NED Abstract

Copyright by American Astronomical Society. Reproduced by permission
1995ApJS...98..369B A MULTIFREQUENCY RADIO CONTINUUM AND IRAS FAINT SOURCE SURVEY OF MARKARIAN GALAXIES M. D. BICAY Laboratory for Astrophysics, National Air and Space Museum, Smithsonian Institution; Earth and Space Sciences Division, Jet Propulsion Laboratory, California Institute of Technology; and NASA Headquarters, Astrophysics Division, Code SZ, Washington, DC 20546; mbicay@hq.nasa.gov G. KOJOIAN Department of Physics and Astronomy, University of Wisconsin-Eau Claire, Eau Claire, WI 54702-4004 J.SEAL Cambridge Research, 1415 Cambridge Drive, Champaign, IL 61821 D. F. DICKINSON Lockheed Palo Alto Research Lab, 3251 Hanover Street; 92-20,254, Palo Alto, CA 94304; and Jet Propulsion Laboratory, California Institute of Technology AND M. A. MALKAN Department of Astronomy, University of California, Las Angeles, Los Angeles, CA 90024-1562 Received 1994 July 5; accepted 1994 November 18 ABSTRACT Results are presented from a multifrequency radio continuum survey of Markarian galaxies (MRKs) and are supplemented by IRAS infrared data from the Faint Source Survey. Radio data are presented for 899 MRKs observed at {nu} = 4.755 GHz with the NRAO-Green Bank 300 foot (91 m) telescope, including nearly 88% of those objects in Markarian lists VI-XIV. In addition, 1.415 GHz measurements of 258 MRKs, over 30% of the MRKs accessible from NAIC-Arecibo, are reported. Radio continuum observations of smaller numbers of MRKs were made at 10.63 GHz and at 23.1 GHz and are also presented. The (1.415 GHz, 4.755 GHz) percentages of "probable" detections were found to be (37%, 15%) for the MRK sample as a whole. These detection rates increased to (49%, 33%) among Seyfert MRKs, and to (73%, 42%) for those classified as having starburst nuclei. The vast majority of radio-detected MRKs have radio luminosities h^2^P_1.415_ < 10^23^ W Hz^-1^, characteristic of "normal galaxies." Infrared data from the IRAS Faint Source Survey (Ver. 2) are presented for 944 MRKs, with reasonably secure identifications extracted from the NASA/IPAC Extragalactic Database. MRKs exhibit the same canonical infrared characteristics as those reported for various other galaxy samples, that is, the well-known enhancement of the 25 micron/60 micron color ratio among Seyfert MRKs, and a clear tendency for MRKs with warmer 60 micron/100 micron colors to also possess cooler 12 micron/25 micron colors. In addition, non-Seyfert MRKs are found to obey the well- documented infrared/radio luminosity correlation, with the tightest correlation seen for starburst MRKs. Linear regression fits to the infrared/radio correlations yield these relationships: log L_FIR_ = 0.77 log P_1.415_ + 19.95 (r = 0.96) and log L_FIR_ = 0.89 log P_4.755_ + 17.51 (r = 0.90). Mean values of the infrared/radio ratios are consistent with those derived for various optically selected galaxy samples. The FIR/radio ratios for starburst MRKs are enhanced by a factor of 3 over those for Seyfert MRKs. There is no statistically significant difference between the infrared/radio ratios of single-nucleus and multiple-nucleus MRKs, although the analysis is complicated by small sample sizes. Subject headings: galaxies: Seyfert - galaxies: starburst - infrared: galaxies - radio continuum: galaxies - surveys
Retrieve 1374 NED objects in this reference.
Please click here for ADS abstract

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