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12 papers · 2 filters
The influence of late-stage nuclear burning on red supergiant supernova light curves
Viktoriya Morozova, Anthony L. Piro, Jim Fuller +1
Many Type II supernovae (SNe) show hot early (~30 days) emission, and a diversity in their light curves extending from the Type IIP to the Type IIL, which can be explained by inter…
Carnegie Supernova Project-II: Near-infrared Spectroscopic Diversity of Type II Supernovae
S. Davis, E. Y. Hsiao, C. Ashall +24
We present near-infrared (NIR) spectra of Type II supernovae (SNe II) from the Carnegie Supernova Project-II (CSP-II), the largest such dataset published to date. We iden…
Ca hnk: Calcium-rich Transient SN 2016hnk from the Helium Shell Detonation of a Sub-Chandrasekhar White Dwarf
Wynn V. Jacobson-Galán, Abigail Polin, Ryan J. Foley +11
We present observations and modeling of SN 2016hnk, a Ca-rich supernova (SN) that is consistent with being the result of a He-shell double-detonation explosion of a C/O white dwarf…
To TDE or not to TDE: The luminous transient ASASSN-18jd with TDE-like and AGN-like qualities
J. M. M. Neustadt, T. W. -S. Holoien, C. S. Kochanek +26
We present the discovery of ASASSN-18jd (AT 2018bcb), a luminous optical/UV/X-ray transient located in the nucleus of the galaxy 2MASX J22434289--1659083 at . Over the ye…
A Physical Basis for the H-band Blue-edge Velocity and Light-Curve Shape Correlation in Context of Type Ia Supernova Explosion Physics
C. Ashall, P. Hoeflich, E. Y. Hsiao +17
Our recent work demonstrates a correlation between the high-velocity blue edge, , of the iron-peak Fe/Co/Ni -band emission feature and the optical light curve shape of…
The Type II-Plateau Supernova 2017eaw in NGC 6946 and Its Red Supergiant Progenitor
Schuyler D. Van Dyk, WeiKang Zheng, Justyn R. Maund +31
We present extensive optical photometric and spectroscopic observations, from 4 to 482 days after explosion, of the Type II-plateau (II-P) supernova (SN) 2017eaw in NGC 6946. SN 20…
Carnegie Supernova Project-II: Using Near-Infrared Spectroscopy to determine the location of the outer Ni in Type Ia Supernovae
C. Ashall, E. Y. Hsiao, P. Hoeflich +17
We present the -band wavelength region of thirty post-maximum light near-infrared (NIR) spectra of fourteen transitional and sub-luminous type Ia supernovae (SNe Ia), extending…
The tidal disruption event AT2017eqx: spectroscopic evolution from hydrogen rich to poor suggests an atmosphere and outflow
M. Nicholl, P. K. Blanchard, E. Berger +24
We present and analyse a new tidal disruption event (TDE), AT2017eqx at redshift z=0.1089, discovered by Pan-STARRS and ATLAS. The position of the transient is consistent with the…
ASASSN-15pz: Revealing Significant Photometric Diversity among 2009dc-like, Peculiar SNe Ia
Ping Chen, Subo Dong, Boaz Katz +17
We report comprehensive multi-wavelength observations of a peculiar Type Ia-like supernova ("SN Ia-pec") ASASSN-15pz. ASASSN-15pz is a spectroscopic "twin" of SN 2009dc, a so-calle…
Gravity and Light: Combining Gravitational Wave and Electromagnetic Observations in the 2020s
R. J. Foley, K. D. Alexander, I. Andreoni +110
As of today, we have directly detected exactly one source in both gravitational waves (GWs) and electromagnetic (EM) radiation, the binary neutron star merger GW170817, its associa…
Implications from ASKAP Fast Radio Burst Statistics
Wenbin Lu, Anthony L. Piro
Although there has recently been tremendous progress in studies of fast radio bursts (FRBs), the nature of their progenitors remains a mystery. We study the fluence and dispersion…
H- emission in the nebular spectrum of the Type Ia supernova ASASSN-18tb
Juna A. Kollmeier, Ping Chen, Subo Dong +6
As part of the 100IAS survey, a program aimed to obtain nebular-phase spectra for a volume-limited and homogeneous sample of Type Ia supernovae (SNe Ia), we observed ASASSN-18tb (S…