Structure and kinematics of the ISM near WR 139

Details Structure and kinematics of the ISM near WR 139 Structure and kinematics of the ISM near WR 139

Jul 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011arep...55..616s&link_type=abstract

Astronomy Reports, Volume 55, Issue 7, pp.616-621

Astronomy and Astrophysics

Astronomy

Scientific paper

The structure and kinematics of the ISM in an extended vicinity of the star WR 139 is analyzed using the results of original H α interferometric observations together with radio and infrared data. A CO cavity with a size of up to 40' has been detected around the star at velocities of V LSR ˜ 2.5-10 km/s; the cavity is bounded to the North by a shell radiating in the optical. Ionized hydrogen emits at the systematic velocities V LSR ˜ 6-14 km/s toward the CO cavity, and at V LSR ≃ 4-11 km/s toward the shell. High-velocity motions of ionized hydrogen inside the cavity testify to the probable expansion of gas that has been swept out by the stellar wind of WR 139 at velocities of up to 60-80 km/s.

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