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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…
A JWST Near- and Mid-Infrared Nebular Spectrum of the Type Ia Supernova 2021aefx
Lindsey A. Kwok, Saurabh W. Jha, Tea Temim +55
We present JWST near- and mid-infrared spectroscopic observations of the nearby normal Type Ia supernova SN 2021aefx in the nebular phase at days past maximum light. Our Nea…
An environmental analysis of the fast transient AT2018cow and implications for its progenitor and late-time brightness
Ning-Chen Sun, Justyn R. Maund, Yali Shao +1
The nature of the newly discovered fast blue optical transients (FBOTs) is still puzzling astronomers. In this paper we carry out a comprehensive analysis of the molecular gas, ion…
A UV census of the environments of stripped-envelope supernovae
Ning-Chen Sun, Justyn R. Maund, Paul A. Crowther
This paper reports an environmental analysis of 41 uniformly-selected stripped-envelope supernovae (SESNe) based on deep ultraviolet-optical images acquired by the Hubble Space Tel…
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…