Radio-continuum observations of a small sample of hot stars

Details Radio-continuum observations of a small sample of hot stars Radio-continuum observations of a small sample of hot stars

Aug 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990aj....100..572d&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 100, Aug. 1990, p. 572-578.

Astronomy and Astrophysics

Astronomy

21

B Stars, Continuous Spectra, Hot Stars, O Stars, Radio Observation, Very Large Array (Vla), Dwarf Stars, Radio Sources (Astronomy), Space Observations (From Earth), Stellar Spectra

Scientific paper

Radio-continuum observations (mostly at 6 cm) of 15 stars with spectral types between O6 and A5 are presented. These data were obtained as part of several Very Large Array programs. Ten of the observed stars were not detected as sources and have typical 3-sigma upper limits about 0.2 mJy. The stars that were detected as radio sources include three O stars (sigma Ori AB, S Mon, and HR 8281), a Be star (gamma Cas), and (possibly) a B dwarf star (HD 26676). Evidence that the radio emission from sigma Ori AB and S Mon is probably nonthermal in nature, and weaker evidence that the HR 8281 radio source is also possibly nonthermal, is presented. The radio observations of all the detected stars, and also of several of the undetected stars for which previous detections have been claimed, are discussed in detail.

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