A dataset provided by the European Space Agency

Name OT2_hbeuther_4
Title Formation signatures and carbon budget of molecular clouds


DOI 10.5270/esa-af0hgr7
Author beuther, h.
Description The interstellar medium (ISM) is mainly comprised of ionized, neutral atomic and molecular gas. One of the most important constituents of these phases is carbon in its ionized-neutral-molecular form (C^+, C^0 and CO). However, a coherent analysis of the different phases at adequate resolution (Jeans length ~0.2pc) is lacking. We therefore want to re-evaluate the ISM carbon budget via observing primarily C^+ at 1.9THz, C^0 (at 492GHz), and CO(2-1) with Herschel, APEX and the IRAM 30m at high spatial resolution (11..-13..) for several infrared dark clouds (IRDCs). This proposal is a follow-up of a guaranteed time pilot study for the line of ionized carbon [CII] toward one IRDC. In this open time project we like to extend the sample to a total of five IRDCs in different environments. With the combined data of the different carbon phases we can address: (a) How do the relative abundances change with evolutionary stage? (b) Are the different phases mainly excited by internal or external radiation sources? (c) How important are the phase changes for the carbon cooling budget of the ISM? (d) Can we identify cloud formation signatures (e.g., turbulent flows)?
Publication Carbon in different phases ([CII], [CI], and CO) in infrared dark clouds: Cloud formation signatures and carbon gas fractions . Beuther H. et al. . Astronomy & Astrophysics, Volume 571, id.A53, 15 pp. . 571 . 10.1051\/0004-6361\/201424757 . 2014A&A...571A..53B ,
Instrument HIFI_HifiMapping_load-raster
Temporal Coverage 2013-04-18T18:36:07Z/2013-04-19T09:59:04Z
Version SPG v14.1.0
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 2013-10-19T07:40:30Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2013-10-19T07:40:30Z, OT2_hbeuther_4, SPG v14.1.0. https://doi.org/10.5270/esa-af0hgr7