Observations with the VLA of the radio binary star AR Lacertae

Abstract

view Abstract Citations (22) References (10) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Observations with the VLA of the radio binary star AR Lacertae. Owen, F. N. ; Spangler, S. R. Abstract Radio observations of AR Lac during three optical eclipses are reported. The observations were made at 4585 MHz with the Very Large Array (VLA) telescope. No clearly defined minimum was found during any of the three eclipses observed. Thus, the radio emission of AR Lac does not originate from a very compact source located at the center of mass of the system. If the radio source is roughly spherical, uniform, and between the two stars, this result suggests that the brightness temperature is no more than about 4 billion K. If the radio source is self-absorbed, as is suggested by the characteristic radio spectrum of AR Lac, then the Lorentz factor of the radiating electrons is less than 4. Publication: The Astrophysical Journal Pub Date: October 1977 DOI: 10.1086/182534 Bibcode: 1977ApJ...217L..41O Keywords: Binary Stars; Radio Stars; Radio Telescopes; Variable Stars; Late Stars; Microwave Emission; Very Large Array (Vla); Astronomy full text sources ADS | data products SIMBAD (1)