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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents



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ID: 358887.1, MPI für Astronomie / Publikationen_mpia
Star formation thresholds derived from THINGS
Authors:Bigiel, F.; Walter, F.; de Blok, E.; Brinks, E.; Madore, B.
Language:English
Publisher:Cambridge University Pr.
Place of Publication:Cambridge
Date of Publication (YYYY-MM-DD):2007
Title of Proceedings:Triggered Star Formation in a Turbulent Interstellar Medium
Start Page:397
End Page:397
Title of Series:IAU Symposium
Volume (in Series):237
Review Status:not specified
Audience:Experts Only
Abstract / Description:We will present first results from THINGS (The HI Nearby Galaxy Survey), which consists of high quality HI maps obtained with the VLA of 34 galaxies across a wide range of galaxy parameters (like e.g. Hubble type, mass or luminosity). We compare the HI with other multiwavelength data and in particular present radial profiles of the HI distribution, which traces the neutral interstellar medium, and compare these profiles to those corresponding to emission seen at other wavelengths. In a first analysis, azimuthally averaged HI profiles are used to derive the observed, average gas surface density, which is compared to the predicted critical density above which organized large-scale star formation is believed to start (this threshold is based on the Toomre-Q parameter, which in turn is a measure for local gravitational instability).
External Publication Status:published
Document Type:Conference-Paper
Communicated by:N. N.
Affiliations:MPI für Astronomie
Identifiers:URL:http://adsabs.harvard.edu/abs/2007IAUS..237..397B [ID No:1]
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