Results 1 to 10 of about 971 (120)

Revealing the Progenitor of SN 2021zby through Analysis of the TESS Shock-cooling Light Curve

open access: yesThe Astrophysical Journal Letters, 2023
We present early observations and analysis of the double-peaked Type IIb supernova (SN IIb) SN 2021zby. TESS captured the prominent early shock-cooling peak of SN 2021zby within the first ∼10 days after explosion with a 30 minute cadence.
Qinan Wang   +43 more
doaj   +1 more source

Prospects for Extending the Core-collapse Supernova Detection Horizon Using High-energy Neutrinos

open access: yesThe Astrophysical Journal, 2023
Large neutrino detectors like IceCube monitor for core-collapse supernovae using low-energy (MeV) neutrinos with a detection reach from a supernova neutrino burst to the Magellanic Cloud. However, some models predict the emission of high-energy neutrinos
Nora Valtonen-Mattila, Erin O’Sullivan
doaj   +1 more source

Early Hard X-Rays from the Nearby Core-collapse Supernova SN 2023ixf

open access: yesThe Astrophysical Journal Letters, 2023
We present NuSTAR observations of the nearby SN 2023ixf in M101 ( d = 6.9 Mpc) that provide the earliest hard X-ray detection of a nonrelativistic stellar explosion to date at δ t ≈ 4 days and δ t ≈ 11 days.
Brian W. Grefenstette   +4 more
doaj   +1 more source

The Type II-P Supernova 2019mhm and Constraints on its Progenitor System

open access: yesThe Astrophysical Journal, 2023
We present pre- and postexplosion observations of the Type II-P supernova (SN II-P) 2019mhm located in NGC 6753. Based on optical spectroscopy and photometry, we show that SN 2019mhm exhibits broad lines of hydrogen with a velocity of −8500 ± 200 km s ...
J. Vazquez   +6 more
doaj   +1 more source

Black Hole Formation Accompanied by the Supernova Explosion of a 40 M ⊙ Progenitor Star

open access: yesThe Astrophysical Journal, 2023
We have simulated the collapse and evolution of the core of a solar-metallicity 40 M _⊙ star and find that it explodes vigorously by the neutrino mechanism, despite its very high “compactness.” Within ∼1.5 s of explosion, a black hole forms.
Adam Burrows   +2 more
doaj   +1 more source

The First Two Years of FLEET: An Active Search for Superluminous Supernovae

open access: yesThe Astrophysical Journal, 2023
In 2019 November, we began operating Finding Luminous and Exotic Extragalactic Transients (FLEET), a machine-learning algorithm designed to photometrically identify Type I superluminous supernovae (SLSNe) in transient alert streams.
Sebastian Gomez   +7 more
doaj   +1 more source

Constraining High-energy Neutrino Emission from Supernovae with IceCube

open access: yesThe Astrophysical Journal Letters, 2023
Core-collapse supernovae are a promising potential high-energy neutrino source class. We test for correlation between seven years of IceCube neutrino data and a catalog containing more than 1000 core-collapse supernovae of types IIn and IIP and a sample ...
R. Abbasi   +393 more
doaj   +1 more source

Neutrinos from core-collapse supernovae at KM3NeT [PDF]

open access: yesEPJ Web of Conferences, 2023
The SN1987A supernova was the first extragalactic neutrino de- tection, but no further observations have been made since. Detecting neutrinos from a galactic supernova would provide invaluable information on the supernova mechanism and particle behavior ...
Bendahman Meriem
doaj   +1 more source

Possible Detection of the Progenitor of the Type II Supernova SN 2023ixf

open access: yesThe Astrophysical Journal Letters, 2023
Stellar evolution theory predicts multiple pathways to the explosive deaths of stars as supernovae. Locating and characterizing the progenitors of well-studied supernovae is important to constrain the theory and to justify and design future surveys to ...
Joanne L Pledger, Michael M Shara
doaj   +1 more source

The Iron Yield of Core-collapse Supernovae

open access: yesThe Astrophysical Journal, 2023
We present a systematic analysis of 191 stripped-envelope supernovae (SE SNe), aimed at computing their ^56 Ni masses from the luminosity in their radioactive tails ( ${M}_{\mathrm{Ni}}^{\mathrm{tail}}$ ) and/or in their maximum light, and the mean ^56 ...
Ósmar Rodríguez, Dan Maoz, Ehud Nakar
doaj   +1 more source

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