Possible wind blown bubbles associated with five Of stars

Details Possible wind blown bubbles associated with five Of stars Possible wind blown bubbles associated with five Of stars

Jun 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999a%26a...346..979b&link_type=abstract

Astronomy and Astrophysics, v.346, p.979-989 (1999)

Astronomy and Astrophysics

Astrophysics

21

Stars: Individual: Hd 152386, Hd 153919, Hd 91572, Hd 91824, Hd 94963, Ism: Bubbles

Scientific paper

Four fields of ~ 5(deg) x 4(deg) have been surveyed using the Hi -21 cm line (hpbw = 0 fdg 5) in searching for Hi interstellar bubbles in the environs of several Of stars. The analysis of the data disclosed four bubble candidates, three with almost complete envelopes. Their dimensions are ~ 40 pc and their expansion velocities around 10 km s(-1) . For each structure swept-up masses (1000 to 8800 Msun), original ambient gas densities ( <~ 0.6 cm(-3) ), dynamical ages ( ~ 2 Myr) and kinetic energies (<~ 2 x 10(49) erg) were derived. The origin of the Hi shells is discussed, taking into account their kinematics, energy, age and the emission at other wavelengths. As in the case of several WR Hi shells, the O strong stellar winds would be the main agents blowing the Hi bubbles.

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