Astronomy and Astrophysics – Astrophysics
Scientific paper
Mar 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...351l..41t&link_type=abstract
Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 351, March 10, 1990, p. L41-L44.
Astronomy and Astrophysics
Astrophysics
65
Gamma Ray Spectra, Line Spectra, Spectrum Analysis, Supernova 1987A, Cobalt Isotopes, Gamma Ray Spectrometers, Least Squares Method, Light Curve, Stellar Models
Scientific paper
Fully resolved gamma-ray line observations from the decay of Co-56 in SN 1987A are presented. Data are from the first two balloon flights of the Gamma-Ray Imaging Spectrometer. On day 433 (after the initial optical sighting) the 847 and 1238 keV lines from Co-56 were observed at 2.3 and 4.3 sigma significance. On day 613, the lines at 847, 1238, and 2599 keV were observed at 4.6, 3.4, and 1.9 sigma, respectively. The combined significance for the three-line complex in both flights is 7.8 sigma. Gaussian profiles yield acceptable least-squares fits to the lines. The line profiles are centered on the red side of the rest energy with typical velocity dispersions of about 3500 km/s FWHM, consistent with an optically thin source, but the line intensities are less than about 30 percent of those produced by the 0.075 solar mass of Co-56 determined from the bolometric light curve.
Barthelmy Scott
Gehrels Neil
Leventhal Marvin
MacCallum Crawford J.
Teegarden Bonnard J.
No associations
LandOfFree
Observations of gamma-ray line profiles from SN 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 Observations of gamma-ray line profiles from SN 1987A, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Observations of gamma-ray line profiles from SN 1987A will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1886129