The Light Curve and Red Spectrum of Nova V4643 Sgr in Early Decline

Details The Light Curve and Red Spectrum of Nova V4643 Sgr in Early Decline The Light Curve and Red Spectrum of Nova V4643 Sgr in Early Decline

Jul 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001ibvs.5138....1b&link_type=abstract

Information Bulletin on Variable Stars, 5138, 1.

Computer Science

3

Nova, Spectroscopy

Scientific paper

The early decline light curve of Nova V4643 Sgr and spectra in the range of H-alpha 19 and 68 after outburst maximum are presented. The t_2 (t_3) times of 4.8 (8.6) days make V4643 Sgr a very fast nova. The MMRD suggests an (upper limit) to the distance of 2900 +/- 170 pc. The profile of the H-alpha emission line consists of a very broad, almost flat component and a narrower central emission (the equivalent width of the latter decreasing more rapidly than that of the former) suggesting a geometry of the ejecta consisting of an equatorial ring and polar blobs and a high orbital inclination of the underlying binary system.

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