A Region of Violent Star Formation in the Irr Galaxy IC 10: Structure and Kinematics of Ionized and Neutral Gas

TL;DR

This study investigates the structure and motion of ionized and neutral gases in a star-forming region of the galaxy IC 10, revealing high-velocity gas features and expanding shells associated with intense star formation activity.

Contribution

It provides new detailed observations of gas kinematics and structures in IC 10's star-forming regions, including the discovery of local expanding neutral-gas shells.

Findings

Detection of high-velocity wings in emission lines.

Identification of local expanding neutral-gas shells.

Evidence of complex gas motions in star-forming regions.

Abstract

We have used observations of the galaxy IC 10 at the 6-m telescope of the Special Astrophysical Observatory with the SCORPIO focal reducer in the Fabry-Perot interferometer mode and with the MPFS spectrograph to study the structure and kinematics of ionized gas in the central region of current intense star formation. Archive VLA 21-cm observations are used to analyze the structure and kinematics of neutral gas in this region. High-velocity wings of the H-alpha and [SII] emission lines were revealed in the inner cavity of the nebula HL 111 and in other parts of the complex of violent star formation. We have discovered local expanding neutral-gas shells around the nebulae HL 111 and HL 106.