Results 21 to 30 of about 763 (187)
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
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Type II Supernova Photospheres and the Distance to Supernova 1987A [PDF]
International Astronomical Union Colloquium, 1988 Among the many historic opportunities provided by the recent supernova in the LMC is that to improve our understanding of the physical conditions in the neighborhood of supernova photospheres, even though 1987A was initially characterized by radial and time scales smaller (by a factor 5–10) than “standard” more luminous SNII.
Manorama Chilukuri, Robert V. Wagoner
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Type-II supernovae and neutrino magnetic moments [PDF]
Astroparticle Physics, 1999 11 pages, 5 figures, latex file, final version, references ...
Nunokawa, Hiroshi +2 more
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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
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Neutrino Transport in a Type II Supernova Environment [PDF]
International Astronomical Union Colloquium, 1986 AbstractWe discuss the full problem of neutrino transport in the context of a Type II supernova environment. We describe the “standard model” of Type II supernova, which involves the core collapse and core bounce of an 8 — 20M⊙ star. Although the shock produced in the standard model is supposed to expel the outer layers of the star, this does not ...
Paul J. Schinder, Stuart L. Shapiro
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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
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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
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On the Explosion of Type II Supernova [PDF]
Progress of Theoretical Physics, 1963 Various nuclear reactions that takes place after the collapse of a stellar core caused by Fe yields He reaction at the iron core of aged massive stars are investigated, and it is shown that an enormous amount of energy from rapid nuclear reactions among light elements such as oxygen and carbon gives rise to the generation of shock waves.
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SN 2023ixf in the Pinwheel Galaxy M101: From Shock Breakout to the Nebular Phase
The Astrophysical JournalWe present photometric and spectroscopic observations of supernova SN 2023ixf covering from day 1 to 442 days after explosion. SN 2023ixf reached a peak V -band absolute magnitude of −18.2 ± 0.07, and light curves show that it has a relatively short ...
WeiKang Zheng +41 more
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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
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