Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985mnras.216.1057m&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 216, Oct. 15, 1985, p. 1057-1071. NSF-supported researc
Astronomy and Astrophysics
Astronomy
7
Cosmic Dust, Infrared Astronomy, Novae, Stellar Envelopes, Broadband, Grain Size, Light Curve, Stellar Luminosity, Stellar Models
Scientific paper
Broad-band infrared observations of FH Ser (Nova Ser 1970) covering the period 40 to 529 days after discovery are presented. Strong quantitative evidence for grain growth in the period 60 - 111 days is derived from the agreement between predictions of dust shell models and the observations. Between days 111 and 129 the grains undergo a significant reduction in size. The infrared luminosity is found to fall as t-3 for t ⪆ 100 days. However, up until day 200 this is due to a continuing grain size reduction, while the bolometric luminosity remains approximately constant. After day 200 the bolometric luminosity falls off as ≡t-1. At late times, an excess flux in the 1 - 3 μm region appears above the dominant cool dust emission component. This excess flux is probably due to increasing line emission in the J, H and K bandpasses as the ejected shell expands.
Hyland A. R.
Mitchell M. R.
Neugebauer Gernot
Robinson Geoffrey
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