Bi-polar supernova explosions

Details Bi-polar supernova explosions Bi-polar supernova explosions

Mar 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aipc..556..324w&link_type=abstract

EXPLOSIVE PHENOMENA IN ASTROPHYSICAL COMPACT OBJECTS: First KIAS Astrophysics Workshop. AIP Conference Proceedings, Volume 556,

Astronomy and Astrophysics

Astrophysics

1

Supernovae

Scientific paper

Core-collapse SNe are found to be significantly polarized. Our preliminary results are: (a) Core-collapse supernonae are normally polarized at 1% level; (b) the polarization of core-collapse SNe increases with the mass of the stellar envelope; (c) their polarizations increase as deeper into the ejecta. We discuss here the optical spectropolarimetry of several core-collapse SNe, SN 1996cb (Type IIB), SN 1997X (Type Ic), and SN 1998S (Type IIn). The data show polarization evolution of several spectral features at levels from 0.5% to above 4%. These data suggest that the distribution of ejected matter is highly aspherical. In the case of SN 1998S, the minimum major to minor axis ratio must be larger than 2.5 to 1 if the polarization is 3% from an oblate spheroidal ejecta seen edge on. A well-defined symmetry axis can be deduced from spectropolarimetry for the peculiar Type IIn SN 1998S. The observed degree of polarization of the Type Ic SN 1997X is above 4%. The data reveal a trend that the degree of polarization increases with decreasing envelope mass and with the depth within the ejecta. The high axial ratio of the ejecta is difficult to explain in terms of the conventional neutrino driven core-collapse models for Type II explosions. Highly asymmetric explosion mechanisms such as the formation of bipolar jets during core-collapse may be a necessary ingredient for models of all core-collapse SNe. .

Affiliated with

Also associated with

No associations

Rating

Bi-polar supernova explosions 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 Bi-polar supernova explosions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Bi-polar supernova explosions will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1004328