Changes inr-process abundances at late times
نویسندگان
چکیده
منابع مشابه
Modeling Supernova Emission at Late Times
We compare model calculations with observations of supernovae at late times to infer the time evolution of temperature, ionization and line emission. Here we mainly report on our results from our modeling of SN 1987A. We discuss the oxygen mass from the modeling of line fluxes. Line profiles show the distribution of the elements and the importance of including time dependence in the calculation...
متن کاملLong-duration Superluminous Supernovae at Late Times
We present nebular-phase observations and spectral models of Type Ic superluminous supernovae. LSQ14an and SN 2015bn both display late-time spectra similar to SN 2007bi, and the class shows strong similarity with broad-lined Type Ic SNe such as SN 1998bw. Near-infrared observations of SN 2015bn at +315d show a strong Ca II triplet, O I 9263, O I 1.13 μm and Mg I 1.50 μm, but no strong He, Si or...
متن کاملWhy did Supernova 1054 shine at late times ?
The Crab nebula is the remnant of supernova 1054 (SN 1054). The progenitor of this supernova has, based on nucleosynthesis arguments, been modeled as an 8 − 10 M ⊙ star. Here we point out that the observations of the late light curve of SN 1054, from the historical records, are not compatible with the standard scenario, in which the late time emission is powered by the radioactive decay of smal...
متن کاملAsymptotic self-similarity breaking at late times in cosmology
We study the late time evolution of a class of exact anisotropic cosmological solutions of Einstein’s equations, namely spatially homogeneous cosmologies of Bianchi type VII0 with a perfect fluid source. We show that, in contrast to models of Bianchi type VIIh which are asymptotically self-similar at late times, Bianchi VII0 models undergo a complicated type of self-similarity breaking. This sy...
متن کاملMinimal Microwave Anisotropy from Perturbations Induced at Late Times
Aside from primordial gravitational instability of the cosmological fluid, various mechanisms have been proposed to generate large-scale structure at relatively late times, including, e.g., “late-time” cosmological phase transitions. In these scenarios, it is envisioned that the universe is nearly homogeneous at the time of last scattering and that perturbations grow rapidly sometime after the ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review C
سال: 2001
ISSN: 0556-2813,1089-490X
DOI: 10.1103/physrevc.64.035801