Evidence for Ram pressure stripping of NGC 3073 by outflowing gas from NGC 3079

Astronomy and Astrophysics – Astronomy

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Extragalactic Radio Sources, Galaxies, Radio Jets (Astronomy), Active Galaxies, Centimeter Waves, Gas Flow, Hydrogen, Pressure Effects, Spiral Galaxies, Tides

Scientific paper

VLA H I observations in both 'C' and 'D' configurations have been made of the active galaxy NGC 3079 and its two companions NGC 3073 and MCG 9-17-9. The dwarf SO galaxy NGC 3073 is found to exhibit an elongated H I tail which is remarkably aligned with the nucleus of NGC 3079. Several scenarios are investigated as to the cause of the tail, including ram pressure and tidal effects. It is suggested that ram pressure due to outflowing gas from NGC 3079 is responsible for the H I tail.

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