Results 21 to 30 of about 49,186 (262)
SN 2018gk Revisited: the Photosphere, the Central Engine, and the Putative Dust
The Astrophysical Journal, 2023 We perform a comprehensive study of the physical properties of SN 2018gk, which is a luminous Type IIb supernova (SN). We find that the early-time photospheric velocity varies from a larger value to a smaller one before the photosphere reaches a ...
Tao Wang +3 more
doaj +1 more source
JWST Imaging of the Cartwheel Galaxy Reveals Dust Associated with SN 2021afdx
The Astrophysical Journal Letters, 2023 We present near- and mid-infrared (0.9–18 μ m) photometry of supernova (SN) 2021afdx, which was imaged serendipitously with the James Webb Space Telescope (JWST) as part of its Early Release Observations of the Cartwheel Galaxy.
Griffin Hosseinzadeh +14 more
doaj +1 more source
SN 2019hcc: a Type II supernova displaying early O
Monthly Notices of the Royal Astronomical Society, 2021 ABSTRACT We present optical spectroscopy together with ultraviolet, optical, and near-infrared photometry of SN 2019hcc, which resides in a host galaxy at redshift 0.044, displaying a sub-solar metallicity. The supernova spectrum near peak epoch shows a ‘w’ shape at around 4000 Å which is usually associated with O ii lines and is typical
Eleonora Parrag +20 more
openaire +7 more sources
Type II Supernovae as Standardized Candles [PDF]
, 2002 We present evidence for a correlation between expansion velocities of the ejecta of Type II plateau supernovae and their bolometric luminosities during the plateau phase. This correlation permits one to standardize the candles and decrease the scatter in
Barbon R. +4 more
core +3 more sources
On Core Collapse Supernovae in Normal and in Seyfert Galaxies [PDF]
, 2002 This paper estimates the relative frequency of different types of core-collapse supernovae, in terms of the ratio f between the number of type Ib--Ic and of type II supernovae.
Bressan, A. +2 more
core +2 more sources
The Dusty Red Supergiant Progenitor and the Local Environment of the Type II SN 2023ixf in M101
The Astrophysical Journal Letters, 2023 As one of the closest supernovae (SNe) in the last decade, SN 2023ixf is an unprecedented target to investigate the progenitor star that exploded. However, there is still significant uncertainty in the reported progenitor properties.
Zexi Niu +5 more
doaj +1 more source
Broad Band Polarimetry of Supernovae: SN1994D, SN1994Y, SN1994ae, SN1995D and SN 1995H [PDF]
, 1996 We have made polarimetric observations of three Type Ia supernovae (SN Ia) and two type II supernovae (SN II). No significant polarization was detected for any of the SN Ia down to the level of 0.2\%, while polarization of order $1.0\%$ was detected for ...
Clocchiatti, Alejandro +3 more
core +2 more sources
Cosmology with Type II supernovae [PDF]
International Journal of Modern Physics D, 2019 With the recent progresses on the Type II supernovae, we attempt to investigate whether there does exist new physics beyond the standard cosmological paradigm, i.e. the cosmological constant [Formula: see text] plus cold dark matter ([Formula: see text]CDM).
openaire +2 more sources
Carnegie Supernova Project-II: Near-infrared Spectroscopic Diversity of Type II Supernovae [PDF]
The Astrophysical Journal, 2019 AbstractWe present 81 near-infrared (NIR) spectra of 30 Type II supernovae (SNe II) from theCarnegie Supernova Project-II(CSP-II), the largest such data set published to date. We identify a number of NIR features and characterize their evolution over time. The NIR spectroscopic properties of SNe II fall into two distinct groups.
S. Davis +26 more
openaire +5 more sources
Progenitors of Type IIb Supernovae. II. Observable Properties [PDF]
The Astrophysical Journal, 2020 Abstract Type IIb supernovae (SNe IIb) present a unique opportunity for investigating the evolutionary channels and mechanisms governing the evolution of stripped-envelope SN progenitors due to a variety of observational constraints.
Niharika Sravan +4 more
openaire +3 more sources