The discovery of nonthermal radio emission from magnetic Bp-Ap stars

Details The discovery of nonthermal radio emission from magnetic Bp-Ap stars The discovery of nonthermal radio emission from magnetic Bp-Ap stars

Nov 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987apj...322..902d&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 322, Nov. 15, 1987, p. 902-908.

Astronomy and Astrophysics

Astronomy

89

A Stars, B Stars, Emission Spectra, Magnetic Stars, Nonthermal Radiation, Peculiar Stars, Radio Sources (Astronomy), Magnetic Field Configurations, Radio Emission, Stellar Radiation, Stellar Spectrophotometry, Thermal Radiation, Very Large Array (Vla)

Scientific paper

In a VLA survey of chemically peculiar B- and A-type stars with strong magnetic fields, five of the 34 stars observed have been identified as 6 cm continuum sources. Three of the detections are helium-strong early Bp stars (Sigma Ori E, HR 1890, and Delta Ori C), and two are helium weak, silicon-strong stars with spectral types near A0p (IQ Aur = HD 34452, Babcock's star = HD 215441). The 6 cm luminosities L6 (ergs/s Hz) range from log L6 = 16.2 to 17.9, somewhat less than the OB supergiants and W-R stars. Three-frequency observations indicate that the helium-strong Bp stars are variable nonthermal sources.

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