Supernova 2008D: A Repetition of Supernova 1987A In a Binary
| dc.creator | Brown, Gerald E. | |
| dc.creator | Lee, Chang-Hwan | |
| dc.date | 2008-10-06 | |
| dc.date.accessioned | 2026-07-07T10:07:47Z | |
| dc.date.available | 2026-07-07T10:07:47Z | |
| dc.description | The Supernova 2008D is similar to that of SN 1987A without the H-envelope. Soderberg et al.(2008) reported the serendipitous discovery of the SN2008D at the time of the explosion, accompanied by an X-ray outburst XRF080109. The central remnant, which we believe to be the black-hole (BH) central engine in the Blandford-Znajek mechanism, is estimated, on the basis of the 7% 56Ni production, to have a mass of 1.6-1.8 M_sun. This is not much larger than the upper limit of 1.56 m_sun for the mass of the compact object in SN1987A found by Bethe & Brown (1995); also, on the basis of the 7.5% 56Ni production, they interpreted it as a low-mass BH. Redoing the light curve so as to take into account the absence of convective carbon burning from zero age main sequence 18-24 M_sun and replacing it by carbon shell burning, we see that the remnant in SN2008D must be less massive than in SN 1987A; there of 18 M_sun. Thus, the maximum neutron star mass is 1.5 M_sun. Note that the metallicity of the host galaxy of SN2008D is similar to that of our Galaxy. | |
| dc.description | 4 pages, 1 figure | |
| dc.identifier | https://arxiv.org/abs/0810.0912 | |
| dc.identifier | http://arxiv.org/abs/0810.0912 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/170767 | |
| dc.subject | Astrophysics | |
| dc.title | Supernova 2008D: A Repetition of Supernova 1987A In a Binary | |
| dc.type | text |