HDE 229189 - A variable AE star in the field of NGC 6910

Details HDE 229189 - A variable AE star in the field of NGC 6910 HDE 229189 - A variable AE star in the field of NGC 6910

May 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991pasp..103..452h&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 103, May 1991, p. 452-456.

Other

2

A Stars, Irregular Variable Stars, Open Clusters, Astronomical Spectroscopy, Binary Stars, Emission Spectra, Stellar Color, Stellar Magnitude

Scientific paper

The star HDE 229189 (BD + 40 4145; in the field, though probably not a member, of the open cluster NGC 6910) has been found to exhibit large photometric changes in V magnitude over relatively short time scales. The total observed range was 0.416 V magnitude. An outburst in 1982 showed an even greater V range (Delta V = 1.66) and concomitant color changes. A coude spectrum of the star taken a week before a minor outburst showed emission at H-alpha but no other unusual lines. The star is likely an A3 (V)e star, an unusual object in itself (since stars as late as A3 seldom show emission at H-alpha), or else possibly a member of a binary system undergoing mass transfer between the members.

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