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 https://doi.org/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 µm range, bridging the gap between earlier infrared space missions and groundbased facilities.
Creator Contact https://support.cosmos.esa.int/h®erschel/
Date Published 2013-06-25T23:02:02Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, higdon, j., 2013, OT2_jhigdon_3, SPG v14.2.0, European Space Agency, https://doi.org/10.5270/esa-lj0khe1