UGC galaxies stronger than 25 mJy at 4. 85 GHz

Journal Article · Fri Feb 01 04:00:00 EST 1991 · Astronomical Journal; (USA)

DOI:https://doi.org/10.1086/115692· OSTI ID:5912700

Condon, J J; Frayer, D T; Broderick, J J ^[1]

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1. National Radio Astronomy Observatory, Charlottesville, VA (USA) Virginia Polytechnic Institute and State Univ., Blacksburg (USA)

UGC galaxies in the declination band +5 to +75 deg were identified by position coincidence with radio sources stronger than 25 mJy on the Green Bank 4.85 GHz sky maps. Candidate identifications were confirmed or rejected with the aid of published aperture-synthesis maps and new 4.86 GHz VLA maps having 15 or 18 arcsec resolution, resulting in a sample of 347 nearby radio galaxies plus five new quasar-galaxy pairs. The radio energy sources in UGC galaxies were classified as starbursts or monsters on the basis of their infrared-radio flux ratios, infrared spectral indices, and radio morphologies. The rms scatter in the logarithmic infrared-radio ratio q is not more than 0.16 for starburst galaxies selected at 4.85 GHz. Radio spectral indices were obtained for nearly all of the UGC galaxies, and S0 galaxies account for a disproportionate share of the compact flat-spectrum (alpha less than 0.5) radio sources. The extended radio jets and lobes produced by monsters are preferentially, but not exclusively, aligned within about 30 deg of the optical minor axes of their host galaxies. The tendency toward minor-axis ejection appears to be independent of radio-source size and is strongest for elliptical galaxies. 230 refs.

• OSTI ID: 5912700
• Journal Information: Astronomical Journal; (USA), Journal Name: Astronomical Journal; (USA) Vol. 101; ISSN 0004-6256; ISSN ANJOA
• Country of Publication: United States
• Language: English

Related Subjects

640105* -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CATALOGS
CONFIGURATION
COORDINATES
COSMIC RADIO SOURCES
DOCUMENT TYPES
ELECTROMAGNETIC RADIATION
ELLIPTICAL CONFIGURATION
GALAXIES
IDENTIFICATION SYSTEMS
INFRARED RADIATION
MORPHOLOGY
PLASMA JETS
QUASARS
RADIATIONS
RADIO GALAXIES
RADIOWAVE RADIATION
STAR EVOLUTION