A dataset provided by the European Space Agency

Name OT2_ehabart_4
Title Unveiling the origin and excitation mechanisms of the warm CO, OH and CH+


DOI 10.5270/esa-4cmov7n
Author habart, e.
Description Photon Dominated Regions (PDRs), where physics and chemistry are driven by FUV photons, show an extreme rich warm gas photochemistry closely related to proto-planetary disks and starburst galaxies. Spatially resolved studies of nearby PDRs are essential as they enable us to characterise the physico-chemical processes that control the regions and can serve as templates for compact systems where these process cannot be disentangled. The rotationally excited lines of CO, OH and CH+ probe the warmest PDR gas layers, providing strong constrains for the modelling of both the complex physics and chemistry driven in the presence of FUV fields. The emission of these lines have been recently connected to the presence of high-density structures (clumps or filaments). We propose to map the high-J CO, OH and CH+ lines in the Orion Bar, using fully sampled PACS maps and HIFI observations. These observations will probe the spatial thickness of the line emission layers necessary for detailed comparison with the state of the art PDR models. This will enable us to characterize the origin and excitation mechanism of these high rotational lines improving our understanding of the physics and chemistry of the warm phase in the ISM.
Publication Spatial distribution of far-infrared rotationally excited CH+ and OH emission lines in the Orion Bar photodissociation region . Parikka A. et al. . Astronomy & Astrophysics, Volume 599, id.A20, 11 pp. . 599 . 10.1051\/0004-6361\/201629445 . 2017A&A...599A..20P ,
Instrument PACS_PacsLineSpec_large, HIFI_HifiMapping_fly
Temporal Coverage 2012-09-14T22:56:18Z/2012-09-16T12:09:56Z
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 2013-03-16T10:00:36Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2013-03-16T10:00:36Z, OT2_ehabart_4, SPG v14.2.0. https://doi.org/10.5270/esa-4cmov7n