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Detection of anhydrous hydrochloric acid, HCl, in IRC + 10216 with the Herschel SPIRE and PACS spectrometers [Letter]

Cernicharo, J., Decin, L., Barlow, M. J., Agúndez, M., Royer, P., Vandenbussche, B., Wesson, R., Polehampton, E. T., De Beck, E., Blommaert, J. A. D. L., Daniel, F., De Meester, W., Exter, K. M., Feuchtgruber, H., Gear, Walter Kieran ORCID:, Goicoechea, J. R., Gomez, Haley Louise ORCID:, Groenewegen, M. A. T., Hargrave, Peter Charles ORCID:, Huygen, R., Imhof, P., Ivison, R. J., Jean, C., Kerschbaum, F., Leeks, S. J., Lim, T. L., Matsuura, Mikako ORCID:, Olofsson, G., Posch, T., Regibo, S., Savini, G., Sibthorpe, B., Swinyard, B. M., Vandenbussche, B. and Waelkens, C. 2010. Detection of anhydrous hydrochloric acid, HCl, in IRC + 10216 with the Herschel SPIRE and PACS spectrometers [Letter]. Astronomy and Astrophysics 518 , L136. 10.1051/0004-6361/201014553

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We report on the detection of anhydrous hydrochloric acid (hydrogen chlorine, HCl) in the carbon-rich star IRC +10216 using the spectroscopic facilities onboard the Herschel satellite. Lines from J = 1–0 up to J = 7–6 have been detected. From the observed intensities, we conclude that HCl is produced in the innermost layers of the circumstellar envelope with an abundance relative to H2 of 5 × 10-8 and extends until the molecules reach its photodissociation zone. Upper limits to the column densities of AlH, MgH, CaH, CuH, KH, NaH, FeH, and other diatomic hydrides have also been obtained.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QB Astronomy
Uncontrolled Keywords: stars: individual: IRC +10216 / stars: carbon / astrochemistry / line: identification / stars: AGB and post-AGB
Additional Information: Letter to the editor
Publisher: EDP Sciences
ISSN: 0004-6361
Last Modified: 13 May 2023 20:58

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