The radio morphology of the X-ray/radio sources near 0454 + 844 and 1803 + 784

Details The radio morphology of the X-ray/radio sources near 0454 + 844 and 1803 + 784 The radio morphology of the X-ray/radio sources near 0454 + 844 and 1803 + 784

May 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apj...280..542j&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 280, May 15, 1984, p. 542-546.

Astronomy and Astrophysics

Astronomy

9

Bl Lacertae Objects, Radio Sources (Astronomy), X Ray Sources, Astronomical Maps, Galactic Clusters, Radio Emission

Scientific paper

The radio emission from the X-ray/radio sources within 20' of the BL Lacertae sources 0454 + 844 and 1803 + 784 has been measured at 49, 20, 6, 2.8, and 2 cm. The radio spectral indices of the radio emission indicate that it is nonthermal in origin. The radio/X-ray source (0450 + 844) near 0454 + 844 has a size and spectral index that can be interpreted as emanating from an optically identified background galaxy and thus is probably not physically associated with 0454 + 844. The radio emission near 1803 + 784 is very complex and consists of at least four sources (1804 + 786, 1805 + 786, 1807 +787a, and 1807 + 787b) that have steep spectral indices. These four sources appear to be spatially aligned with 1803 + 784. The possibility of this emission being physically associated with 1803 + 784 source cannot be ruled out. However, deep CCD investigations of the field near the bright radio sources 1807 + 787a, b indicate that the radio emission may arise from members of a background cluster of galaxies of which the compact radio source 1803 + 784 may or may not be a member.

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