SIMBAD references

2007ApJ...670..428C - Astrophys. J., 670, 428-441 (2007/November-3)

The bubbling galactic disk. II. The inner 20°.

CHURCHWELL E., WATSON D.F., POVICH M.S., TAYLOR M.G., BABLER B.L., MEADE M.R., BENJAMIN R.A., INDEBETOUW R. and WHITNEY B.A.

Abstract (from CDS):

We report 269 mid-infrared bubbles within 10° of the Galactic center from visual inspection of the Spitzer GLIMPSE II Legacy Science program images. The surface density of bubbles is ∼5/deg2 or about 3 times that detected in longitudes|l|=10°-65°, because the inner 10° of longitude were more thoroughly searched for small bubbles. There is a gradient in the number of bubbles with longitude with an increase of about a factor of 2 from 2° to 10°; this is probably the result of several factors, including decreasing diffuse background brightness, confusion, and opacity with longitude. Bubble eccentricities are typically between 0.6 and 0.8, and >50% show evidence for blowouts, which we suggest result from local density fluctuations of the ISM and/or anisotropic stellar winds and radiation fields. The fraction of bubbles identified with H II regions and clusters is only about half that found at|l|>10°. This is largely a result of the much smaller angular diameter of bubbles cataloged in the inner Galaxy than in the outer Galaxy. At least 12% of the bubbles have morphologies suggestive of triggered star formation. Most of the bubbles that show evidence for triggered star formation in the inner Galaxy have not formed secondary bubbles; it is postulated that this may be because they are too young to have had time for this to occur.

Abstract Copyright:

Journal keyword(s): ISM: H II Regions - ISM: Bubbles - Stars: Formation

VizieR on-line data: <Available at CDS (J/ApJ/670/428): table1.dat table2.dat>

Nomenclature: Table 1: [CWP2007] CN NNN (Nos 1-151). Table 2: [CWP2007] CS NNN (Nos 1-118).

Simbad objects: 273

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2019.08.19-15:08:02

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