Unifying 99 Percent Of Gamma-ray Bursts, Supernovae, Millisecond Pulsars, And Ia Cosmology

Details Unifying 99 Percent Of Gamma-ray Bursts, Supernovae, Millisecond Pulsars, And Ia Cosmology Unifying 99 Percent Of Gamma-ray Bursts, Supernovae, Millisecond Pulsars, And Ia Cosmology

May 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...210.1001m&link_type=abstract

American Astronomical Society Meeting 210, #10.01; Bulletin of the American Astronomical Society, Vol. 39, p.106

Astronomy and Astrophysics

Astronomy

Scientific paper

Early measurements of SN 1987A can be interpreted in light of the beam/jet (BJ) which had to hit polar ejecta (PE) to produce the "Mystery Spot" (MS), separated from the SN by about 17 light-days in projection. It takes an extra 8 days for the leading light from the BJ to hit the MS, and early measurements show 2e39 ergs/s for a day at day 8 (the same delay PREDICTED from the MS), before dropping off by day 8.5. A rise in luminosity near day 10 indicates particles from the BJ hitting the PE, with the fastest traveling at 0.8 c. The details of 87A strongly suggest that it resulted from a merger of two stellar cores of a common envelope (CE) binary, i.e., a "double-denerate" (DD). Without having to blast through the CE of Sk -69 202, it is likely that the BJ would have caused a full long/soft GRB (lGRB) upon hitting the PE, thus DD is a mechanism which can produce lGRBs. A 0.5 degree offset, the typical collimation for a GRB, over the 20 or so light days to the 87A PE, produces a minute or so of delay, MATCHING the observed delay of their non-prompt parts. Because DD 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 initial photon spectrum of 99% of GRBs is KNOWN. Pulsars in non-core-collapsed globulars are also 99% DD, consistent with their 2.10 ms minimum period, and the 2.14 ms period from 87A. Because Type Ia SNe are also DD, this is a concern for systematics in Ia Cosmology, because they will appear to be Ic's when viewed from their merger poles, given sufficient non-thermonuclear matter above that lost to core-collapse.

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