Star Formation in Spiral Arms
نویسندگان
چکیده
منابع مشابه
Star Formation in Disks: Spiral Arms, Turbulence, and Triggering Mechanisms
Star formation is enhanced in spiral arms because of a combination of orbit crowding, cloud collisions, and gravitational instabilities. The characteristic mass for the instability is 10 M⊙ in gas and 10 5 M⊙ in stars, and the morphology is the familiar beads on a string with 1-2 kpc separation. Similar instabilities occur in resonance rings and tidal tails. Sequential triggering from stellar p...
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Studying star formation in spiral arms tells us not only about the evolution of star formation, and molecular clouds, but can also tell us about the nature of spiral structure in galaxies. I will address both these topics using the results of recent simulations and observations. Galactic scale simulations are beginning to examine in detail the evolution of Giant Molecular Clouds (GMC) as they f...
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We positionally match a sample of infrared-selected young stellar objects, identified by combining the Spitzer Galactic Legacy Infrared Mid-Plane Survey Extraordinaire, Wide-field Infrared Survey Explorer and Herschel Space Observatory Herschel infrared Galactic Plane Survey, to the dense clumps identified in the millimetre continuum by the Bolocam Galactic Plane Survey in two Galactic lines of...
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The rotation curve for the IV galactic quadrant, within the solar circle, is derived from the Columbia University U. de Chile CO(J=1→0) survey of molecular gas. A new sampling, four times denser in longitude than in our previous analysis, is used to compute kinematical parameters that require derivatives w/r to galactocentric radius; the angular velocity Ω(R), the epicyclic frequency κ(R), and ...
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The line of sight through the Galactic Plane between longitudes l = 37.83◦ and l = 42.50◦ allows for the separation of Galactic Ring Survey molecular clouds into those that fall within the spiral arms and those located in the inter-arm regions. By matching these clouds in both position and velocity with dense clumps detected in the mm continuum by the Bolocam Galactic Plane Survey, we are able ...
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ژورنال
عنوان ژورنال: EAS Publications Series
سال: 2011
ISSN: 1633-4760,1638-1963
DOI: 10.1051/eas/1151002