The Impact of External Tidal Fields on the ISM of Dwarf Spheroidals
classification
🌌 astro-ph
keywords
tidaldwarfaxisalongassociatedbeyondcetusclouds
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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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