Spectropolarimetry of Core-Collapse Supernovae
- Creators
- Leonard, D. C.
- Filippenko, A. V.
- Others:
- Turatto, M.
- Benetti, S.
- Zampieri, L.
- Shea, W.
Abstract
We briefly review the young field of spectropolarimetry of core-collapse supernovae (SNe). Spectropolarimetry provides the only direct known probe of early-time supernova (SN) geometry. The fundamental result is that asphericity is a ubiquitous feature of young core-collapse SNe. However, the nature and degree of the asphericity vary considerably. The best predictor of core-collapse SN polarization seems to be the mass of the hydrogen envelope that is intact at the time of the explosion: those SNe that arise from progenitors with large, intact envelopes (e.g., Type II-plateau) have very low polarization, while those that result from progenitors that have lost part (SN IIb, SN IIn) or all (SN Ib) of their hydrogen (or even helium; SN Ic) layers prior to the explosion tend to show substantial polarization. Thus, the deeper we probe into core-collapse events, the greater the asphericity seems to be, suggesting a fundamentally asymmetric explosion with the asymmetry damped by the addition of envelope material.
Additional Information
© 2005 Astronomical Society of the Pacific. Submitted on 21 Sep 2004. D.C.L. is supported by an NSF Astronomy and Astrophysics Postdoctoral Fellowship under award AST-0401479. A.V.F. is grateful for NSF grant AST-0307894.Attached Files
Published - Leonard2005p97121604-2004_Supernovae_As_Cosmological_Lighthouses.pdf
Files
Name | Size | Download all |
---|---|---|
md5:0ef96c03128ec3b0aeb692da3e5241a6
|
361.3 kB | Preview Download |
Additional details
- Eprint ID
- 24950
- Resolver ID
- CaltechAUTHORS:20110819-073513351
- AST-0401479
- NSF
- AST-0307894
- NSF
- Created
-
2011-08-19Created from EPrint's datestamp field
- Updated
-
2023-06-01Created from EPrint's last_modified field
- Series Name
- ASP Conference Series
- Series Volume or Issue Number
- 342