| Name | OT2_ehabart_4 |
| Title | Unveiling the origin and excitation mechanisms of the warm CO, OH and CH+ |
| URL | http://archives.esac.esa.int/hsa/whsa-tap-server/data?retrieval_type=OBSERVATION&observation_id=1342250994&instrument_name=PACS&product_level=LEVEL0&compress=true |
| DOI | https://doi.org/10.5270/esa-4cmov7n |
| Author | European Space Agency |
| 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 | Importance of radiative pumping for the excitation of the H2O submillimeter lines in galaxies . González-Alfonso Eduardo et al. . Astronomy and Astrophysics . null . null . 2022A&A...666L...3G , 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 µm range, bridging the gap between earlier infrared space missions and groundbased facilities. |
| Creator Contact | https://support.cosmos.esa.int/h®erschel/ |
| Date Published | 2013-03-16T10:00:36Z |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, 2013, Unveiling The Origin And Excitation Mechanisms Of The Warm Co Comma Oh And Ch+, SPG v14.2.0, European Space Agency, https://doi.org/10.5270/esa-4cmov7n |