The Impact of External Tidal Fields on the ISM of Dwarf Spheroidals

Details The Impact of External Tidal Fields on the ISM of Dwarf Spheroidals The Impact of External Tidal Fields on the ISM of Dwarf Spheroidals

2000-09-06

arxiv.org/abs/astro-ph/0009100v1

Astronomy and Astrophysics

Astrophysics

2 pages, 2 figures; to appear in the proceedings of the conference "Gas and Galaxy Evolution" (ASP Conference Series), eds. J.

Scientific paper

It was found that for three dwarf spheroidal galaxies - Sculptor, Tucana, and Cetus - there is a correspondence between the distribution of associated HI gas and the projected tidal axis direction. Numerical hydrodynamical simulations confirmed the following scenario: SN Ia explosions remove most of the interstellar medium beyond the tidal radius of the dwarf galaxy, with most of the mass being in clouds moving along the principal tidal axis.

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