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Diversity of dust properties in external galaxies confirmed by polarization signals from Type II supernovae
Takashi Nagao, Ferdinando Patat, Keiichi Maeda +8
Investigating interstellar (IS) dust properties in external galaxies is important not only to infer the intrinsic properties of astronomical objects but also to understand the star…
The Interaction of Supernova 2018evt with a Substantial Amount of Circumstellar Matter -- An SN1997cy-like Event
Yi Yang, Dietrich Baade, Peter Hoeflich +29
A rare class of supernovae (SNe) is characterized by strong interaction between the ejecta and several solar masses of circumstellar matter (CSM) as evidenced by strong Balmer-line…
Spectropolarimetry of the Thermonuclear Supernova 2021rhu: High Calcium Polarization 79 Days After Peak Luminosity
Yi Yang, Huirong Yan, Lifan Wang +19
We report spectropolarimetric observations of the Type Ia supernova (SN) 2021rhu at four epochs: 7, +0, +36, and +79 days relative to its -band maximum luminosity. A waveleng…
Finding Multiply-Lensed and Binary Quasars in the DESI Legacy Imaging Surveys
C. Dawes, C. Storfer, X. Huang +4
The time delay between multiple images of strongly lensed quasars is a powerful tool for measuring the Hubble constant (H0). To achieve H0 measurements with higher precision and ac…
An asymmetric electron-scattering photosphere around optical tidal disruption events
Giorgos Leloudas, Mattia Bulla, Aleksandar Cikota +10
A star crossing the tidal radius of a supermassive black hole will be spectacularly ripped apart with an accompanying burst of radiation. A few tens of such tidal disruption events…
SN 2018bsz: a Type I superluminous supernova with aspherical circumstellar material
M. Pursiainen, G. Leloudas, E. Paraskeva +26
We present a spectroscopic analysis of Type I superluminous supernova (SLSN-I), SN 2018bsz. While it closely resembles SLSNe-I, the multi-component H line appearing at …