A dataset provided by the European Space Agency

Name OT2_jhigdon_3
Title The ''Over-Cooked.. ISM of Starburst Ring Galaxies
URL

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DOI 10.5270/esa-lj0khe1
Author higdon, j.
Description Studies of evolved systems like AM0644-741 and Cartwheel find the ISM in the starburst rings to be overwhelmingly atomic despite conditions (e.g., pressure and ambient far-UV fields) clearly favoring a dominant molecular component. Moreover, the local molecular fraction anti-correlates with SFR-area, yielding unusually high star formation efficiencies (SFE) and a highly peculiar star formation law. AM0644-741.s starburst ring moreover appears mostly stable gravitationally (Q = 2-6). We have argued that these all follow naturally from the ISM.s >100 Myr confinement time in the ring, which amplifies the destructive effects of embedded OB stars and SNe, producing an ''over-cooked.. ISM, i.e., one characterized by small H2 clouds, and a large photo-dissociated HI background. Due to reduced dust columns, H2 is poorly traced by CO rotational lines, and we expect a large ''dark.. molecular component in the ring. We will use PACS and SPIRE photometry with existing IRAC and MIPS data to (1) construct infrared-submillimeter SEDs for the rings of AM0644-741 and Cartwheel to determine the total mass and distribution of H2 by its dust emission following Israel (1996) and Leroy et al. (2009), (2) re-evaluate their peculiar SFE, non-Schmidt star formation laws, and gravitational stability. Not finding a large hidden H2 component would imply that star formation is triggered by other processes (e.g., collisions) at unusually high SFE.
Publication
Instrument PACS_PacsPhoto_largeScan, SPIRE_SpirePhoto_small
Temporal Coverage 2012-03-01T10:16:56Z/2012-12-25T23:31:21Z
Version SPG v14.2.0
Mission Description Herschel was launched on 14 May 2009! It is the fourth 'cornerstone' mission in the ESA science programme. With a 3.5 m Cassegrain telescope it is the largest space telescope ever launched. It is performing photometry and spectroscopy in approximately the 55-671 ┬Ám range, bridging the gap between earlier infrared space missions and groundbased facilities.
Creator Contact https://support.cosmos.esa.int/herschel/
Date Published 2013-06-25T23:02:02Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2013-06-25T23:02:02Z, OT2_jhigdon_3, SPG v14.2.0. https://doi.org/10.5270/esa-lj0khe1