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4 papers · 1 filter
Cosmic microwave background constraints on a decaying cosmological term related to the thermal evolution
Riou Nakamura, Masa-aki Hashimoto, Kiyotomo Ichiki
We constrain the thermal evolution of the universe with a decaying cosmological term by using the method of the analysis for the Wilkinson Microwave Anisotropy Probe (WMAP) observa…
A giant outburst two years before the core-collapse of a massive star
A. Pastorello, S. J. Smartt, S. Mattila +32
The death of massive stars produces a variety of supernovae, which are linked to the structure of the exploding stars. The detection of several precursor stars of Type II supernova…
Effects of QCD phase transition on gravitational radiation from two-dimensional collapse and bounce of massive stars
Nobutoshi Yasutake, Kei Kotake, Masa-aki Hashimoto +1
We perform two-dimensional, magnetohydrodynamical core-collapse simulations of massive stars accompanying the QCD phase transition. We study how the phase transition affects the gr…
Magnitude systems in old star catalogues
Tomoko Fujiwara, Hitoshi Yamaoka
The current system of stellar magnitudes first introduced by Hipparchus was strictly defined by Norman Robert Pogson in 1856. He based his system on Ptolemy's star catalogue `Almag…