A new, distant dwarf nova - 2138-453

Details A new, distant dwarf nova - 2138-453 A new, distant dwarf nova - 2138-453

Aug 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...182..271h&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 182, no. 2, Aug. 1987, p. 271, 272.

Astronomy and Astrophysics

Astrophysics

13

Dwarf Novae, Milky Way Galaxy, Stellar Spectrophotometry, Variable Stars, H Alpha Line, Spectrum Analysis

Scientific paper

A distant dwarf nova has been discovered at about 3.0 kpc below the galactic plane. The large amplitude of dwarf novae, of the order of 2-4 mag, means that if one of them flares during a sequence of observations, it will stand out among other variables, especially quasars, which rarely have an amplitude much larger than 1 mag. Assuming that the volume sampled is representative of the halo as a whole, their frequency may be estimated by comparison with the RR Lyrae survey of the same field.

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