Statistics – Computation
Scientific paper
Sep 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987pasp...99..905t&link_type=abstract
Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 99, Sept. 1987, p. 905-914.
Statistics
Computation
4
Balmer Series, Charge Coupled Devices, H Alpha Line, Light (Visible Radiation), Optical Emission Spectroscopy, Supernova 1987A, Computational Astrophysics, Energy Sources, Light Curve, Morphology, Time Dependence
Scientific paper
CCD spectroscopy of SN 1987A from February 24-28, 1987 is presented. Spectra with 10 A resolution and signal-to-noise ratio is excess of 200, over a range 3900 A to 9000 A, are reduced to flux relative to the continuum at 8000 A. Spectra as a function of time and nightly difference spectra are obtained. Strong and broad hydrogen Balmer P-Cygni profiles, increasing in intensity with time, and H-alpha absorption velocity decreasing from 19,000 km/s are seen. H-alpha velocity componnents up to 31,000 km/s are found on February 25 UT. The He I feature at 5400 A disappears after February 26 and Ca II at 8200 A appears strongly after February 27. Spectra as a function of angular distance from SN 1987A are also obtained, showing the adjacent nebular emission of the LMC. There is no evidence for a circumstellar shell. These data are most consistent with an unusually low envelope mass progenitor.
Boeshaar Patricia C.
Tyson Anthony J.
No associations
LandOfFree
Early optical spectroscopy of supernova 1987A does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Early optical spectroscopy of supernova 1987A, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Early optical spectroscopy of supernova 1987A will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1677056