A dataset provided by the European Space Agency

Name OT2_alopezse_3
Title Mapping the cosmic ray ionisation rate across the Northern end of the Orion A iant molecular cloud
URL

http://archives.esac.esa.int/hsa/whsa-tap-server/data?retrieval_type=OBSERVATION&observation_id=1342240368&instrument_name=HIFI&product_level=LEVEL0&compress=true

DOI 10.5270/esa-ulwz78w
Author lopez-sepulcre, a.
Description Cosmic rays (CR) are ubiquitous in the Galaxy and have the important role of ionizing the dens gas of the ISM. New Herschel observations have shown the huge diagnostic power of the OH+ fundamental transition to measure the CR ionization rate in diffuse clouds. Based on previous "serendipity" observations toward OMC2-FIR4 within the KP CHESS, we discovered a tenuous foreground cloud absorbing the fundamental OH+ line. Similarly, Gupta et al. (2010) found an OH+ absorption component at a similar velocity towards Orion KL and estimated a large CR ionization rate more than 10 times larger than the average value observed in diffuse clouds . We propose here to roughly map the CR ionization rate in the direction of the OMC2 and OMC3 complex to understand its extent, nature, and, finally, the source of ionization.
Publication Herschel CHESS discovery of the fossil cloud that gave birth to the Trapezium and Orion KL . López-Sepulcre A. et al. . Astronomy & Astrophysics, Volume 549, id.A114, 9 pp. . 549 . 10.1051\/0004-6361\/201219416 . 2013A&A...549A.114L ,
Instrument HIFI_HifiPoint_dbs
Temporal Coverage 2012-02-22T16:15:13Z/2012-02-22T16:32:15Z
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 µm range, bridging the gap between earlier infrared space missions and groundbased facilities.
Creator Contact https://support.cosmos.esa.int/herschel/
Date Published 2012-08-22T16:15:13Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2012-08-22T16:15:13Z, OT2_alopezse_3, SPG v14.1.0. https://doi.org/10.5270/esa-ulwz78w