Broad-band photometry of extreme helium stars

Details Broad-band photometry of extreme helium stars Broad-band photometry of extreme helium stars

Apr 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apj...279..748d&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 279, April 15, 1984, p. 748-750.

Other

13

A Stars, Astronomical Photometry, Binary Stars, Infrared Stars, Peculiar Stars, Giant Stars, Helium, Radiant Flux Density, Stellar Envelopes

Scientific paper

The authors present UBVRIJHKL photometry of most known extreme helium stars and hydrogen-deficient binaries. The two stars which show pronounced infrared excesses, υ Sgr and LSS 4300, are both hydrogen-deficient binaries. A third star, LSS 1922, also appears to be a hydrogen-deficient binary, but it does not have a pronounced infrared excess. The other nine stars are apparently single, and none of them shows an infrared excess. It is concluded that some of the hydrogen-deficient binaries have circumstellar dust shells, but that single extreme helium stars do not.

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