Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26as...70..125v&link_type=abstract
Astronomy and Astrophysics Supplement Series (ISSN 0365-0138), vol. 70, no. 1, July 1987, p. 125-140.
Astronomy and Astrophysics
Astronomy
106
Astronomical Photometry, Blue Stars, Light Curve, Novae, Ultraviolet Astronomy, Andromeda Galaxy, Electrophotometry, Stellar Color, Stellar Magnitude
Scientific paper
Published photoelectric UBV data on novae are used here to derive light and color curves, colors at maximum light, absolute magnitudes, and rates of decline in B and V for Galactic novae. It is found that novae with smooth light curves exhibit a sharp red pulse which reaches maximum intensity within one day of maximum light; i.e., when the nova photosphere has its largest radius. The strength of this red pulse differs from nova to nova but is always stronger in U-B than in B-V. The duration of such red pulses is shortest for novae that decline rapidly in luminosity. The intrinsic color of novae two magnitudes below V(max) is -0.02 + or - 0.04 with an internal dispersion of less than about 0.12 mag. This result may be used to derive the interstellar absorption suffered by novae.
van den Bergh Sidney
Younger Frank P.
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