Two-epoch VLA observations of variable galactic plane radio sources

Details Two-epoch VLA observations of variable galactic plane radio sources Two-epoch VLA observations of variable galactic plane radio sources

Apr 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987aj.....93..890d&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 93, April 1987, p. 890-897.

Astronomy and Astrophysics

Astronomy

7

Milky Way Galaxy, Radio Sources (Astronomy), Stellar Spectrophotometry, Variable Stars, Astronomical Maps, Centimeter Waves, Spectrum Analysis, Time Measurement

Scientific paper

The authors present two-epoch VLA observations of seven variable radio sources from the galactic plane survey of Gregory and Taylor. Three of the sources are found to be highly variable. They exhibit inverted spectra (Sν ∝ να) between 6 and 20 cm and are unresolved to 0.07 - 0.1arcsec. Four other sources have morphologies reminiscent of jets and lobes and exhibit no structural changes between the two epochs. All sources contain at least one compact component, and in the case of the double and triple sources comparisons with survey data suggest that these undergo transient and dramatic changes in flux. The object GT 2203+559 presents the exciting possibility of another Sco X-1 candidate. Two sources have close optical counterparts.

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