NEW RESULTS FROM THE CARMA LARGE-AREA STAR FORMATION SURVEY (CLASSY)

Harris, Robert J

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https://hdl.handle.net/2142/79380 Copy

Description

Title

NEW RESULTS FROM THE CARMA LARGE-AREA STAR FORMATION SURVEY (CLASSY)

Author(s)

Harris, Robert J

Contributor(s)

• Arce, Héctor
• Lee, Katherine
• Rizzo, Maxime
• Storm, Shaye
• Mundy, Lee
• Fernandez-Lopez, Manuel
• Segura-Cox, Dominique M.
• Looney, Leslie

Issue Date

24-Jun-15

Keyword(s)

Astronomy

Abstract

Interferometric imaging spectroscopy of molecular clouds permits the physical and thermodynamic structure, kinematics, and chemistry of molecular clouds to be probed over a wide range of spatial scales, from entire clouds to the individual cores where stars are born. As such, it allows the study of what fundamental physical processes are at play in star formation. The CARMA Large Area Star-formation Survey (CLASSy) Key Project surveyed dense gas tracers (the HCN, HCO$+$, and N$_2$H$^+$ J=1-0 emission) and dust continuum emission over 700 square arc-minutes from 3 fields in Perseus (NGC 1333, Barnard 1, and L1451) and 2 fields in Serpens (Serpens Main and Serpens South), with sensitivity to structures on spatial scales ranging from 1000 AU to several parsecs. We have used these data to characterize the importance of turbulence and magnetic fields in star formation on physical scales ranging from the largest clouds to the immediate environment of individual young stellar objects. We present results from both CLASSy and a significant extension of this project, CLASSy Prime, to more deeply survey these regions in both the same and different tracers, including several organic molecules. In particular, we focus on discrepancies between the structure of filaments seen in line emission -- particularly N$_2$H$^+$ -- and the same filaments seen in dust emission, and we suggest that these might be due to excitation conditions and/or chemical effects. We also discuss how emission from the different molecules that have been observed with CLASSy Prime highlight kinematics of different substructures within these regions.

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

text

Language

English

Permalink

http://hdl.handle.net/2142/79380

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