The radio structure of HM Sagittae

Details The radio structure of HM Sagittae The radio structure of HM Sagittae

Apr 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apj...279..188k&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 279, April 1, 1984, p. 188-196.

Astronomy and Astrophysics

Astronomy

44

Peculiar Stars, Radio Astronomy, Stellar Envelopes, Stellar Spectrophotometry, Variable Stars, Brightness, Distance, Interstellar Extinction, Position (Location), Spatial Resolution, Stellar Evolution, Stellar Magnitude, Stellar Winds, Very Large Array (Vla)

Scientific paper

Observations of the peculiar variable star HM Sge, made with the Very Large Array radio telescope are reported. The nebula of HM Sge is spatially resolved, showing a diffuse halo surrounding a central shell about 0.15 arcsec in size. This nebular structure is explained by the interaction of stellar winds originating from the hot and cool components of the system. It is suggested that the visual brightening of HM Sge in 1975 was due to a decrease in circumstellar extinction and the subsequent ionization of the circumstellar nebula.

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