Structures, spectral indexes, and optical identifications of radio sources selected from the B3 catalogue

Journal Article · Tue Aug 01 04:00:00 EDT 1989 · Astronomical Journal; (USA)

DOI:https://doi.org/10.1086/115153· OSTI ID:5428658

Vigotti, M; Grueff, G; Perley, R; Clark, B G; Bridle, A H ^[1]

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1. CNR, Istituto di Radioastronomia, Bologna (Italy)

A homogeneous sample of 1103 radio sources which were selected from the Third Bologna Catalogue (Ficarra et al., 1985) at 408 MHz and which cover the flux-density range from 2.0-1.0 Jy has been mapped at 1465 MHz using the VLA at 15 arcsec resolution. Identifications are proposed for 354 of the sources. The results suggest that sizable intrinsic radio-optical displacements are possible for steep-spectrum unresolved sources, that the 408-1465 MHz spectra become steeper with decreasing flux density (to about 50 mJy), and that metric size and redshift are negatively correlated for radio galaxies. 85 refs.

• OSTI ID: 5428658
• Journal Information: Astronomical Journal; (USA), Journal Name: Astronomical Journal; (USA) Vol. 98; ISSN 0004-6256; ISSN ANJOA
• Country of Publication: United States
• Language: English

Related Subjects

640102* -- Astrophysics & Cosmology-- Stars & Quasi-Stellar
Radio & X-Ray Sources
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CATALOGS
CORRELATIONS
COSMIC RADIO SOURCES
DOCUMENT TYPES
ELECTROMAGNETIC RADIATION
FLUX DENSITY
IDENTIFICATION SYSTEMS
MORPHOLOGY
RADIANT FLUX DENSITY
RADIATION FLUX
RADIATIONS
RED SHIFT
SIZE
VISIBLE RADIATION