Kinematics around a non thermal superbubble in IC 10

Physics

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Scientific paper

IC 10 has long recognized as a peculiar object (Hubble 1936). Among Local Gr oup dwarf galaxies, IC 10 has the highest surface density of WR stars and the highest current rate of star formation (Mateo 1998). The presence of so many WR stars and the high H alpha luminosity emphasize that IC 10 is undergoing a strong burst of star formation that began at least 10 Myr ago. Based upon radio continuum observations, Yang & Skillman (1993) found a non thermal superbubble in this galaxy. This large superbubble (about 250pc) seems to be associated with a region of star formation containing two of the most luminous H II regions and the most massive H I cloud in IC 10. In this work, we study the kinematics of this non-thermal supperbubble. We present our H alpha and [S II] images as well as the radial velocity field.

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