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Kohno et al. have performed a multi-wavelength study of the
mid-infrared bubble GAL 334.53+00.83 to investigate the origin of
isolated high-mass star and the star-formation process around the
bubble formed by the H II region. They describe the results of CO
observations toward this isolated galactic bubble using the NANTEN2,
Mopra, and ASTE radio telescopes. They found two distinct velocity
components in the direction of the bubble, at −84 km/s and −79 km/s,
which are likely to be physically associated with the bubble. They
hypothesize that the two clouds collided with each other 3 Myr ago,
triggering the formation of the isolated high-mass star in GAL
334.53+00.83. They argue that this scenario can explain the origin of
the isolated O-star inside the bubble. The figure above shows, at
left, a map of the integrated 12CO J = 1–0 emission in the velocity
range of −88.5 to −69.2 km/s, where the contours show the Spitzer/IRAC
8-µm result. At right is the Mopra map of integrated intensity of the
12CO J = 1–0 emission. The final beam size after convolution is 45′′.
Full details are given in
the paper, to appear in the Publications of the Astronomical Society of Japan.
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