The type Icn SN 2021csp: implications for the origins of the fastest supernovae and the fates of Wolf–Rayet stars

DA Perley, J Sollerman, S Schulze, Y Yao… - The Astrophysical …, 2022 - iopscience.iop.org
We present observations of SN 2021csp, the second example of a newly identified type of
supernova (SN) hallmarked by strong, narrow, P Cygni carbon features at early times (Type …

The spins of compact objects born from helium stars in binary systems

J Fuller, W Lu - Monthly Notices of the Royal Astronomical …, 2022 - academic.oup.com
The angular momentum (AM) content of massive stellar cores helps us to determine the
natal spin rates of neutron stars and black holes. Asteroseismic measurements of low-mass …

The X-ray and radio loud fast blue optical transient AT2020mrf: implications for an emerging class of engine-driven massive star explosions

Y Yao, AYQ Ho, P Medvedev, AJ Nayana… - The Astrophysical …, 2022 - iopscience.iop.org
We present AT2020mrf (SRGe J154754. 2+ 443907), an extra-galactic (z= 0.1353) fast blue
optical transient (FBOT) with a rise time of tg, rise= 3.7 days and a peak luminosity of M g …

Late-time H/He-poor Circumstellar Interaction in the Type Ic Supernova SN 2021ocs: An Exposed Oxygen–Magnesium Layer and Extreme Stripping of the Progenitor

H Kuncarayakti, K Maeda, L Dessart… - The Astrophysical …, 2022 - iopscience.iop.org
Supernova (SN) 2021ocs was discovered in the galaxy NGC 7828 (z= 0.01911) within the
interacting system Arp 144 and subsequently classified as a normal Type Ic SN around peak …

Luminous supernovae: unveiling a population between superluminous and normal core-collapse supernovae

S Gomez, E Berger, M Nicholl… - The Astrophysical …, 2022 - iopscience.iop.org
Stripped-envelope core-collapse supernovae can be divided into two broad classes: the
common Type Ib/c supernovae (SNe Ib/c), powered by the radioactive decay of 56 Ni, and …

A new scenario for magnetar formation: Tayler-Spruit dynamo in a proto-neutron star spun up by fallback

P Barrère, J Guilet, A Reboul-Salze, R Raynaud… - Astronomy & …, 2022 - aanda.org
Magnetars are isolated young neutron stars characterised by the most intense magnetic
fields known in the Universe, which power a wide variety of high-energy emissions from …

An Early-time Optical and Ultraviolet Excess in the Type-Ic SN 2020oi

A Gagliano, L Izzo, CD Kilpatrick… - The Astrophysical …, 2022 - iopscience.iop.org
We present photometric and spectroscopic observations of Supernova 2020oi (SN 2020oi),
a nearby (∼ 17 Mpc) type-Ic supernova (SN Ic) within the grand-design spiral M100. We …

A Multiwavelength View of the Rapidly Evolving SN 2018ivc: An Analog of SN IIb 1993J but Powered Primarily by Circumstellar Interaction

K Maeda, P Chandra, TJ Moriya, A Reguitti… - The Astrophysical …, 2022 - iopscience.iop.org
SN 2018ivc is an unusual Type II supernova (SN II). It is a variant of SNe IIL, which might
represent a transitional case between SNe IIP with a massive H-rich envelope and SNe IIb …

Collapse of rotating massive stars leading to black hole formation and energetic supernovae

S Fujibayashi, Y Sekiguchi, M Shibata… - The Astrophysical …, 2023 - iopscience.iop.org
We explore a possible explosion scenario resulting from core collapses of rotating massive
stars that leave a black hole by performing radiation-viscous-hydrodynamics simulations in …

First Impressions: Early-time Classification of Supernovae Using Host-galaxy Information and Shallow Learning

A Gagliano, G Contardo… - The Astrophysical …, 2023 - iopscience.iop.org
Substantial effort has been devoted to the characterization of transient phenomena from
photometric information. Automated approaches to this problem have taken advantage of …