Near-infrared observations of Nova Herculis 1991

Details Near-infrared observations of Nova Herculis 1991 Near-infrared observations of Nova Herculis 1991

Apr 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992mnras.255..412c&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 255, April 1, 1992, p. 412-418. Research supported by D

Astronomy and Astrophysics

Astronomy

16

Hercules Nova, Infrared Astronomy, Light Curve, Near Infrared Radiation, Black Body Radiation, Star Formation, Stellar Luminosity

Scientific paper

Observations of Nova Herculis 1991 made in the near infrared are reported, mainly in the J, H, and K filter bands, commencing from day 13 after the nova explosion and spread over a period of over 50 days. The temporal variations of the IR flux indicate an early onset of dust formation processes in this fast nova. The light curve shows a slow decline proportional to 1/t until day 25 and then a sharper decline proportional to 1/t exp 4. Blackbody angular-size calculations exhibit a steady increase until about the same time a sharp change thereafter, suggesting cessation of dust formation following onset of the free expansion phase. Blackbody temperatures show a steady decline proportional to 1/sq rt t, from a value of 1400 K observed on day 14.

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