It is convenient to consider three types of stellar evolution 1) "hyperbolic": masses of nuclei formed as a result of evolution are > M ch; such evolution ends in a Type II Supernova (SNII) outburst; 2) "parabolic" - masses of nuclei 鈮 M ch, with the evolution ending in an SNI...
Supernova 1997D, serendipitously discovered on 14 January 1997 during an observation of the parent galaxy NGC 1536 (De Mello &Benetti (1997)), is the first, clearly identified ex- ample of a peculiar Type II supernova with a very low lumi- ...
supernovae: individual: SN 2004etWe present mid-infrared (MIR) spectroscopy of a Type II-plateau supernova, SN 2004dj, obtained with the Spitzer Space Telescope, spanning 106--1393 d after explosion. MIR photometry plus optical/near-IR observations are also reported. An early-time MIR excess...
having a significant impact on galaxy evolution. The details of these processes depend on the nature of supernova progenitors, but it is unclear if Type Ic supernovae (without hydrogen or helium lines in their spectra)
The neutrino background has never been detected, but it is believed to be dominantly produced by type-II supernovae. On the other hand, the gamma-ray background has been detected, but it is now believed that the contribution from type-Ia supernovae is subdominant (see Figs. 3, and 4)...
Type Ia and II supernovae contributions to the metal enrichment in the intra-cluster medium observed with Suzaku ApJ Letter, vol. 667, L41, 2007 PASJ, vol. 59, 299, 2007 PASJ, in press, astro-ph/070.4342, Kosuke Sato1, K. Tokoi2, K. Matsusihta1, Y. Ishisaki2, N. Y. Yamasaki...
is discussed for the Mn-type stars on the theory that peculiar A stars were once secondaries in binary systems in which the primaries exploded as type II supernovae. During the explosions (γ,n) reactions probably formed Hg from Pb and modified the structure of the Sr-Y-Zrs-process peak....
Mechanisms for formation and destruction of molecules in Type Ia supernovae (SNe Ia) are explored and contrasted with those in Type II supernovae (SNe II). In the absence of grains, molecular formation in the highly ionized ejecta is initiated by radiative association and radiative attachment....
Supernova Remnant Example:Veil Nebula What Causes a Nebula? Essentially, a nebula is formed when portions of the interstellar material experience agravitational collapse. Mutual gravitational attraction causes matter in space to gather and join together, forming areas of intensifying density. ...
We reveal the first-ever spectroscopic evidence for silicate dust formed in the ejecta of a supernova. This is supported by our detection of a large, but progressively declining, mass of SiO. However, we conclude that the mass of directly detected ejecta dust 展开 DOI: 10.1088/0004-637x/...