H-alpha observations of four novae in M31

Details H-alpha observations of four novae in M31 H-alpha observations of four novae in M31

Sep 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983apj...272...92c&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 272, Sept. 1, 1983, p. 92-98.

Astronomy and Astrophysics

Astrophysics

20

Andromeda Galaxy, H Alpha Line, Novae, Astrometry, Distance, Emission Spectra, Galactic Nuclei, Spectrophotometry

Scientific paper

On-line off-line H-alpha plates of M31's nucleus revealed four bright stellar objects (mR being approximately 14.9, 15.0, 15.8, 16.4) within 1.2 kpc of the galaxy center. Spectrophotometric observations made 10 days later showed the stars were novae in the stage of early decline. In the 10 day interval, the H-alpha emission from these novae faded less than a magnitude, despite the fact that their continua had long since faded from view. The high luminosity and long decay time of the H-alpha emission suggest it might make an excellent standard candle for extragalactic distance measurements.

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