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Issue A&A
Volume 382, Number 2, February I 2002
Page(s) 554 - 555
Section Formation, structure and evolution of stars
DOI http://dx.doi.org/10.1051/0004-6361:20011625



A&A 382, 554-555 (2002)
DOI: 10.1051/0004-6361:20011625

Research Note

Support for a white dwarf in the Be star binary ${\gamma}$ Cassiopeiae

K. M. V. Apparao

34, Vibha, opp. Cardinal School, R.P. Road, Bandra East, Bombay 400051, India

(Received 12 October 2001 / Accepted 6 November 2001 )

Abstract
The recently discovered orbital period for ${\gamma}$ Cas and the modulation period in X-rays and optical are consistent with the orbital period-spin period relation for white dwarfs derived from a similar relation found for Be star - neutron star binaries. This lends support for the existence of a white dwarf in the ${\gamma}$ Cas binary.


Key words: stars: ${\gamma}$ Cas -- white dwarf -- stars: emission line, Be stars -- stars: binaries -- stars: neutron

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