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Strong Near-Infrared Carbon Absorption in the Transitional Type Ia SN 2015bp
S. D. Wyatt, D. J. Sand, E. Y. Hsiao +20
Unburned carbon is potentially a powerful probe of Type Ia supernova (SN) explosion mechanisms. We present comprehensive optical and near-infrared (NIR) data on the "transitional"…
Line Identification and Excitation of Autoionizing States in a Late-Type, Low Mass Wolf-Rayet Star
Robert Williams, Catherine Manea, Bruce Margon +1
Identifications of a large fraction of previously unidentified lines in the complex spectrum of the low mass, late-type LMC [WC11] star J060819.93-715737.4 have been made utilizing…
Optical and Near-Infrared Observations of the Nearby Type Ia Supernova 2017cbv
Lingzhi Wang, Carlos Contreras, Maokai Hu +28
Supernova (SN) 2017cbv in NGC 5643 is one of a handful of type Ia supernovae (SNe~Ia) reported to have excess blue emission at early times. This paper presents extensive $BVRIYJHK_…
The Red Supergiant Binary Fraction of the Large Magellanic Cloud
Kathryn F. Neugent, Emily M. Levesque, Philip Massey +2
The binary fraction of unevolved massive stars is thought to be 70-100% but there are few observational constraints on the binary fraction of the evolved version of a subset of the…
The Carnegie Supernova Project II. Observations of SN 2014ab possibly revealing a 2010jl-like SN IIn with pre-existing dust
T. J. Moriya, M. D. Stritzinger, F. Taddia +18
We present optical and near-infrared photometry and spectroscopy of the Type IIn supernova (SN) 2014ab, obtained by the Carnegie Supernova Project II (CSP-II) and initiated immedia…
A Survey for C II Emission-Line Stars in the Large Magellanic Cloud
Bruce Margon, Philip Massey, Kathryn F. Neugent +1
We present a narrow-band imaging survey of the Large Magellanic Cloud, designed to isolate the C II 7231, 7236 emission lines in objects as faint as . Th…