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Astrophysics and Astronomy

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University of Massachusetts Amherst

2012

Stars: formation

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Full-Text Articles in Physical Sciences and Mathematics

Molecular Outlfows Identified In The Fcrao Co Survey Of The Taurus Molecular Cloud, Gopal Narayanan, Ronald Snell, Ashley Bemis Jan 2012

Molecular Outlfows Identified In The Fcrao Co Survey Of The Taurus Molecular Cloud, Gopal Narayanan, Ronald Snell, Ashley Bemis

Gopal Narayanan

Jets and outflows are an integral part of the star formation process. While there are many detailed studies of molecular outflows towards individual star-forming sites, few studies have surveyed an entire star-forming molecular cloud for this phenomenon. The 100-deg2 Five College Radio Astronomy Observatory CO survey of the Taurus Molecular Cloud provides an excellent opportunity to undertake an unbiased survey of a large, nearby, molecular cloud complex for molecular outflow activity. Our study provides information on the extent, energetics and frequency of outflows in this region, which are then used to assess the impact of outflows on the parent molecular …

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Star Formation Laws: The Effects Of Gas Cloud Sampling, Daniela Calzetti, G. Liu, J. Koda Jan 2012

Star Formation Laws: The Effects Of Gas Cloud Sampling, Daniela Calzetti, G. Liu, J. Koda

Daniela Calzetti

Recent observational results indicate that the functional shape of the spatially-resolved star formation-molecular gas density relation depends on the spatial scale considered. These results may indicate a fundamental role of sampling effects on scales that are typically only a few times larger than those of the largest molecular clouds. To investigate the impact of this effect, we construct simple models for the distribution of molecular clouds in a typical star-forming spiral galaxy, and, assuming a power-law relation between SFR and cloud mass, explore a range of input parameters. We confirm that the slope and the scatter of the simulated SFR-molecular …

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