Other
Scientific paper
May 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aipc.1000..350m&link_type=abstract
GAMMA-RAY BURSTS 2007: Proceedings of the Santa Fe Conference. AIP Conference Proceedings, Volume 1000, pp. 350-353 (2008).
Other
Gamma-Ray Sources, Gamma-Ray Bursts, Faint Blue Stars, White Dwarfs, Degenerate Stars, Nuclei Of Planetary Nebulae, Supernova Remnants
Scientific paper
Very early measurements of SN 1987A (87 A) indicate an intense beam of light and jet of particles (BJ), which still ran ahead of a slower, cooler, shrouding flow, cooled itself, or lost the ability to do so, before impacting polar ejecta (PE) remaining from the binary merger which formed Sk -69 °202. The photon beam scattered off/reprocessed in, without significantly penetrating, the PE, producing 2×1039 ergs s-1 for about a day at day 8.0, the same delay predicted from the 0.059 arc s offset (17 light-days in projection) of the ``Mystery Spot'' (MS), and from the ring/bipolar geometry (the many other details of 87A also strongly suggest that it resulted from a merger of 2 stellar cores of a common envelope (CE) binary, i.e., a ``double-degenerate'' [DD] event). This scattered flux then decayed for a day with a timescale consistent with the UV flash, after which the luminosity exceeded the day 8.0 value by day 10.0, and continued rising linearly with time, indicating: (1) particles from the jet penetrating into the PE, with (2) the fastest traveling at >0.9 c, and (3) that both the beam and jet had collimation factors >104. Even having to penetrate the CE of Sk -69 °202, the BJ may have produced a full long/soft gamma-ray burst (lGRB) upon impacting the PE. Because DD can produce lGRBs, and must be the dominant SN mechanism in elliptical galaxies, where only short/hard GRBs (sGRBs) have been observed, DD without CE and PE also produces sGRBs, and thus the pre/non-CE/PE photon spectrum of 99% of GRBs is known, and neutron star (NS)-NS mergers may not make GRBs as we know them, and/or be as common as previously thought.
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