Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990aj.....99.1079c&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 99, April 1990, p. 1079-1087, 1339.
Astronomy and Astrophysics
Astronomy
36
Elliptical Galaxies, Novae, Peculiar Galaxies, Absorption Spectra, Charge Coupled Devices, Galactic Bulge, H Alpha Line, Spatial Distribution, Telescopes
Scientific paper
The results are presented of a five year nova survey of NGC 5128 performed with an H-alpha filter at the prime focus of the CTIO 4 m telescope. In all, 16 novae were detected, of which 12 are members of a statistically complete and homogeneous sample unaffected by the absorption lane of the galaxy. When normalized to B luminosity, the nova rate in the elliptical component of NGC 5128 is 2.7 + or - 1.0 times less than that observed in the bulge of M31. However, when normalized in the infrared K bandpass, the two nova rates are identical, and comparable to that measured in the Large Magellanic Cloud. These data suggest that (1) the percentage of binary stars is approximately constant over a large range of star-forming environments, (2) the nova rate in our own galaxy is between 11 and 46/yr, and (3) nova rates are not strongly affected by tidal captures in bright globular clusters.
Ciardullo Robin
Ford Holland C.
Jacoby George H.
Tamblyn Peter
Williams Robert E.
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