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The 1999aa-like Type Ia Supernova iPTF14bdn in the Ultraviolet and Optical
Michael T. Smitka, Peter J. Brown, Nicholas B. Suntzeff +5
We present ultraviolet (UV) and optical photometry and spectra of the 1999aa-like supernova (SN) iPTF14bdn. The UV data were observed using the Swift Ultraviolet/Optical Telescope…
The Silicon and Calcium High-Velocity Features in Type Ia Supernovae from Early to Maximum Phases
Xulin Zhao, Xiaofeng Wang, Keiichi Maeda +7
The high-velocity features (HVFs) in optical spectra of type Ia supernovae (SNe Ia) are examined with a large sample including very early-time spectra (e.g., t < -7 days). Multiple…
Physical Dust Models for the Extinction toward Supernova 2014J in M82
Jian Gao, B. W. Jiang, Aigen Li +2
Type Ia supernovae (SNe Ia) are powerful cosmological "standardizable candles" and the most precise distance indicators. However, a limiting factor in their use for precision cosmo…