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Titolo:
THE PROGENITOR OF SUPERNOVA-1993J - A STRIPPED SUPERGIANT IN A BINARY-SYSTEM
Autore:
PODSIADLOWSKI P; HSU JJL; JOSS PC; ROSS RR;
Indirizzi:
UNIV CAMBRIDGE,INST ASTRON CAMBRIDGE CB3 0HA ENGLAND MIT,DEPT PHYS CAMBRIDGE MA 02139 UNIV CALIF BERKELEY BERKELEY CA 94720 MIT,DEPT SPACE RES CAMBRIDGE MA 02139 MIT,CTR THEORET PHYS CAMBRIDGE MA 02139 COLL HOLY CROSS WORCESTER MA 01610
Titolo Testata:
Nature
fascicolo: 6437, volume: 364, anno: 1993,
pagine: 509 - 511
SICI:
0028-0836(1993)364:6437<509:TPOS-A>2.0.ZU;2-I
Fonte:
ISI
Lingua:
ENG
Soggetto:
EVOLUTION; STARS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
16
Recensione:
Indirizzi per estratti:
Citazione:
P. Podsiadlowski et al., "THE PROGENITOR OF SUPERNOVA-1993J - A STRIPPED SUPERGIANT IN A BINARY-SYSTEM", Nature, 364(6437), 1993, pp. 509-511

Abstract

SUPERNOVA 1993J in the spiral galaxy M81 is the brightest supernova since SN1987A and, like the latter, appears to be another 'peculiar' type II supernova. The available photometry1,2 of the supernova region before the explosion requires the presence of at least two supergiants (one of early spectral type and the other of late type), but the actual progenitor has yet to be identified. Here we show that the explosionof a late-type supergiant can explain the initial sharp peak in the supernova light curve, provided that the star had lost almost all of its hydrogen-rich envelope before the explosion. In our model, the secondary brightening of the supernova, approximately 10 days later, is then a consequence of the radioactive decay of Ni-56 and subsequently Co-56) produced in the explosion. The progenitor could have lost its hydrogen-rich envelope either in a strong stellar wind or, as seems more likely, through mass transfer to a companion star. In the latter case, the companion should reappear after the supernova photosphere has receded, the system having become a binary composed of a neutron star witha massive stellar companion.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 15/07/20 alle ore 03:50:16