Results 31 to 40 of about 49,186 (262)
The Astrophysical Journal, 1985 In this paper we exploit the fact that the collapsing core of a massive star, at the endpoint of its thermonuclear life, rapidly becomes hydrostatic after bouncing at nuclear densities. The energy transferred by pdV work from the inner unshocked core as it becomes hydrostatic to the bounce shock in the outer core is, to a good approximation, the ...
J. M. Lattimer, A. Burrows, A. Yahil
openaire +1 more source
The Astrophysical Journal Letters, 2023 We present preexplosion optical and infrared (IR) imaging at the site of the type II supernova (SN II) 2023ixf in Messier 101 at 6.9 Mpc. We astrometrically registered a ground-based image of SN 2023ixf to archival Hubble Space Telescope (HST), Spitzer ...
Charles D. Kilpatrick +19 more
doaj +1 more source
Type II supernova diversity [PDF]
Proceedings of the International Astronomical Union, 2015 AbstractIt is now firmly established that at a significant fraction of hydrogen-rich type II supernovae (SNe II) arise from red supergiant progenitors. However, a large diversity of SN properties exist, and it is presently unclear how this can be understood in terms of progenitor differences and pre-SN stellar evolution. In this contribution, I present
openaire +2 more sources
Type-II supernovae and neutrino magnetic moments [PDF]
Astroparticle Physics, 1999 11 pages, 5 figures, latex file, final version, references ...
Nunokawa, Hiroshi +2 more
openaire +3 more sources
An updated Type II supernova Hubble diagram [PDF]
Astronomy & Astrophysics, 2018 We present photometry and spectroscopy of nine Type II-P/L supernovae (SNe) with redshifts in the 0.045 ≲z≲ 0.335 range, with a view to re-examining their utility as distance indicators. Specifically, we apply the expanding photosphere method (EPM) and the standardized candle method (SCM) to each target, and find that both methods yield distances that ...
Gall, E. E. E. +17 more
openaire +5 more sources
A sample of Type II-L supernovae [PDF]
Monthly Notices of the Royal Astronomical Society, 2014 MNRAS in ...
Faran, T. +10 more
openaire +2 more sources
Observational constraints on the progenitors of core-collapse supernovae : the case for missing high mass stars [PDF]
, 2015 Over the last 15 years, the supernova community has endeavoured to identify progenitor stars of core-collapse supernovae in high resolution archival images of their galaxies.This review compiles results (from 1999 - 2013) in a distance limited sample and
Smartt, S. J.
core +1 more source
Nlte-Effects in Supernovae Type II Photospheres [PDF]
Highlights of Astronomy, 1986 AbstractIn order to provide accurate fluxes of supernovae Type II as needed for the application of the Baade-Wesselink method we have constructed spherical model photospheres for these objects under the assumption that hydrogen and helium are in statistical equilibrium.
P. Höflich, R. Wehrse, G. Shaviv
openaire +1 more source
Dust formation in primordial Type II supernovae [PDF]
Monthly Notices of the Royal Astronomical Society, 2001 11 pages, LaTeX, 11 figures, MNRAS ...
Todini, Paolo, Ferrara, Andrea
openaire +2 more sources
The Prevalence and Influence of Circumstellar Material around Hydrogen-rich Supernova Progenitors
The Astrophysical Journal, 2023 Narrow transient emission lines (flash-ionization features) in early supernova (SN) spectra trace the presence of circumstellar material (CSM) around the massive progenitor stars of core-collapse SNe.
Rachel J. Bruch +47 more
doaj +1 more source