Results 51 to 60 of about 2,165 (169)
Early-phase Simultaneous Multiband Observations of the Type II Supernova SN 2024ggi with Mephisto
The Astrophysical Journal LettersWe present early-phase good-cadence (hour-to-day) simultaneous multiband ( ugi and vrz bands) imaging of the nearby supernova SN 2024ggi, which exploded in the nearby galaxy NGC 3621.
Xinlei Chen +26 more
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The Astrophysical Journal, 2023 Type IIP supernovae (SNe IIP) mark the explosive death of red supergiants (RSGs), evolved massive stars with an extended hydrogen envelope. They are the most common supernova type and allow for the benchmarking of supernova explosion models by ...
Shuai Zha +3 more
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Circumstellar Interaction in the Ultraviolet Spectra of SN 2023ixf 14–66 Days After Explosion
The Astrophysical Journal LettersSN 2023ixf was discovered in M101 within a day of the explosion and rapidly classified as a Type II supernova with flash features. Here we present ultraviolet (UV) spectra obtained with the Hubble Space Telescope 14, 19, 24, and 66 days after the ...
K. Azalee Bostroem +22 more
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A Panchromatic View of Late-time Shock Power in the Type II Supernova 2023ixf
The Astrophysical Journal LettersWe present multiwavelength observations of the Type II supernova (SN II) 2023ixf during its first 2 yr of evolution. We combine ground-based optical/near-infrared spectroscopy with Hubble Space Telescope far- and near-ultraviolet spectroscopy and James ...
W. V. Jacobson-Galán +42 more
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Neutrino annihilation in Type II supernovae
The Astrophysical Journal, 1987 Neutrino-antineutrino annihilation into electrons and positrons can deposit > 1051 ergs above the neutrino- sphere of a Type II supernova. All species of neutrino contribute roughly equally to the deposited energy. This process, which appears not to have been included in numerical calculations of supernova explosions, may help to drive off the stellar ...
Jeremy Goodman +2 more
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Multiple Shells in Supernova 2023ixf Support the Jittering Jets Explosion Mechanism
The Astrophysical Journal LettersExamining the photospheric time evolution of the core-collapse supernova (CCSN) SN 2023ixf from the literature, we identify two (possibly three) evolutionary time periods with constant expansion velocities, which we attribute to two (or three) ejecta ...
Noam Soker, Kobi Shiran
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Odessa Astronomical Publications, 2017 The light emission (“glow”) of cold dusty plasma of the remnant of SN 1987A was confirmed by the Hubble Space Telescope observations on 7th January, 1995.
D. N. Doikov, S. M. Andrievsky
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Optical Spectroscopy of Type Ia Supernovae by the Carnegie Supernova Projects I and II
The Astrophysical JournalWe present the second and final release of optical spectroscopy of Type Ia supernovae (SNe Ia) obtained during the first and second phases of the Carnegie Supernova Project (CSP-I and CSP-II).
N. Morrell +59 more
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The Astrophysical JournalWe present UV–optical–near-infrared observations and modeling of supernova (SN) 2024ggi, a type II supernova (SN II) located in NGC 3621 at 7.2 Mpc. Early-time (“flash”) spectroscopy of SN 2024ggi within +0.8 days of discovery shows emission lines of H i
W. V. Jacobson-Galán +30 more
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Binary Interaction Can Yield a Diversity of Circumstellar Media around Type II Supernova Progenitors
The Astrophysical JournalRecent observations of supernovae (SNe) have indicated that a fraction of massive stars possess dense circumstellar medium (CSM) at the moment of their core collapses.
Tomoki Matsuoka, Ryo Sawada
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