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: http://ip.rsu.ru/~vorobyov/project2.htm
Дата изменения: Thu Sep 27 12:58:28 2007 Дата индексирования: Mon Oct 1 20:44:13 2012 Кодировка: Поисковые слова: п п п п п п п п п п п п п п р п р п р п р п р п |
We perform numerical hydrodynamic modeling of various physical
processes that can form an HI ring as is observed in Holmberg~I.
Three energetic mechanisms are considered: multiple
supernova explosions (SNe), a hypernova explosion associated with a gamma
ray burst (GRB), and the vertical impact of a high velocity cloud (HVC).
We find that multiple SNe are in general more effective
in producing shells that break out of the disk
than a GRB of the same total energy. Both multiple SNe and
single GRBs can produce kpc-sized HI rings in dwarf galaxies, whereas HVCs
are much less effective in producing giant HI rings.
The results were published in Astronomy and Astrophysics, 2005, 431, 451.
The paper in the pdf format can be downloaded
here . This research was done in collaboration with
Prof. Shantanu Basu.
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Left: Consequtive explosion of 20 supernovae during 30 Myr. <\br> Right: Single hypernova (GRB) explosion with the total energy equivalent to 20 supernovae. The simulation was performed using a 2D Eulerian hydro code. The animation was done using IDL. My special thanks are to Dr. Takahiro Kudoh for the help with IDL. |