期刊
ASTROPHYSICAL JOURNAL
卷 759, 期 1, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0004-637X/759/1/38
关键词
gamma-ray burst: general; radiative transfer; supernovae: general
资金
- ARC Laureate Fellowship [FL0992131]
- Australian Commonwealth Government, through the National Computational Merit Allocation
- Australian Government
- World Premier International Research Center Initiative (WPI Initiative), MEXT, Japan
- [CE110001020]
- [23740141]
- Grants-in-Aid for Scientific Research [24740117, 23740141, 23224004] Funding Source: KAKEN
We carry out the first multi-dimensional radiative transfer calculations to simultaneously compute synthetic spectra and light curves for models of supernovae driven by fast bipolar outflows. These allow us to make self-consistent predictions for the orientation dependence of both color evolution and spectral features. We compare models with different degrees of asphericity and metallicity and find significant observable consequences of both. In aspherical models, we find spectral and light curve features that vary systematically with observer orientation. In particular, we find that the early-phase light curves are brighter and bluer when viewed close to the polar axis but that the peak flux is highest for equatorial (off-axis) inclinations. Spectral line features also depend systematically on observer orientation, including the velocity of the Si II 6355 angstrom line. Consequently, our models predict a correlation between line velocity and color that could assist the identification of supernovae associated with off-axis jet-driven explosions. The amplitude and range of this correlation depends on the degree of asphericity, the metallicity, and the epoch of observation but we find that it is always present and acts in the same direction.
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