Zobrazeno 1 - 10
of 1 131
pro vyhledávání: '"Umeda, H"'
We report on robust measurements of elemental abundances of the Type IIn supernova SN 1978K, based on the high-resolution X-ray spectrum obtained with the Reflection Grating Spectrometer (RGS) onboard XMM-Newton. The RGS clearly resolves a number of
Externí odkaz:
http://arxiv.org/abs/2001.01975
Autor:
Orlando, S., Ono, M., Nagataki, S., Miceli, M., Umeda, H., Ferrand, G., Bocchino, F., Petruk, O., Peres, G., Takahashi, K., Yoshida, T.
Publikováno v:
A&A 636, A22 (2020)
(Abridged) We aim at linking the dynamical and radiative properties of the remnant of SN 1987A to the geometrical and physical characteristics of the parent aspherical SN explosion and to the internal structure of its progenitor star. We performed 3D
Externí odkaz:
http://arxiv.org/abs/1912.03070
A critical mass ONe core with a high ignition density is considered to end in gravitational collapse leading to neutron star formation. Being distinct from a Fe core collapse, the final evolution involves combustion flame propagation, in which comple
Externí odkaz:
http://arxiv.org/abs/1812.07175
Even after elaborate investigations for 30 years, we still do not know well how the progenitor of SN 1987A has evolved. To explain unusual red-to-blue evolution, previous studies suggest that in a red giant stage either the increase of surface He abu
Externí odkaz:
http://arxiv.org/abs/1705.04084
Autor:
Nozawa, T., Kozasa, T., Umeda, H., Hirashita, H., Maeda, K., Nomoto, K., Tominaga, N., Habe, A., Dwek, E., Takeuchi, T. T., Ishii, T. T.
We present recent advances in theoretical studies of the formation and evolution of dust in primordial supernovae (SNe) that are considered to be the main sources of dust in the early universe. Being combined with the results of calculations of dust
Externí odkaz:
http://arxiv.org/abs/0812.1448
Publikováno v:
Astrophys.J.692:1517-1531,2009
There have been attempts to fit the abundance patterns of extremely metal-poor stars with supernova nucleosynthesis models for the lighter elements than Zn. On the other hand, observations have revealed that the presence of EMP stars with peculiarly
Externí odkaz:
http://arxiv.org/abs/0810.5661
Several short-lived radionuclides (SLRs) were present in the early solar system, some of which should have formed just prior to or soon after the solar system formation. Stellar nucleosynthesis has been proposed as the mechanism for production of SLR
Externí odkaz:
http://arxiv.org/abs/0808.1441
The connection between the long GRBs and Type Ic Supernovae (SNe) has revealed the interesting diversity: (i) GRB-SNe, (ii) Non-GRB Hypernovae (HNe), (iii) X-Ray Flash (XRF)-SNe, and (iv) Non-SN GRBs (or dark HNe). We show that nucleosynthetic proper
Externí odkaz:
http://arxiv.org/abs/0803.1964
Autor:
Nozawa, T., Kozasa, T., Tominaga, N., Sakon, I., Tanaka, M., Suzuki, T., Nomoto, K., Maeda, K., Umeda, H., Limongi, M., Onaka, T.
SN 2006jc is a peculiar supernova (SN), in which the formation of dust has been confirmed at an early epoch of ~50 days after the explosion. We investigate the possibility of such an earlier formation of dust grains in the expanding ejecta of SN 2006
Externí odkaz:
http://arxiv.org/abs/0801.2015
Autor:
Sakon, I., Wada, T., Ohyama, Y., Ishihara, D., Tanabé, T., Kaneda, H., Onaka, T., Tominaga, N., Tanaka, M., Suzuki, T., Umeda, H., Nomoto, K., Nozawa, T., Kozasa, T., Minezaki, T., Yoshii, Y., Ohyabu, S., Usui, F., Matsuhara, H., Nakagawa, T., Murakami, H.
Publikováno v:
Astrophys.J.692:546-555,2009
We present our latest results on near- to mid- infrared observation of SN2006jc at 200 days after the discovery using the Infrared Camera (IRC) on board $AKARI$. The near-infrared (2--5$\mu$m) spectrum of SN2006jc is obtained for the first time and i
Externí odkaz:
http://arxiv.org/abs/0711.4801