A dataset provided by the European Space Agency

Name OT2_pcaselli_7
Title Constraining the chemistry of water in pre-stellar cores


DOI 10.5270/esa-hfjor35
Author caselli, p.
Description With this proposal, we aim to measure the water vapor abundance in two nearby dark clouds with different physical and chemical characteristics, following the successful recent Herschel results of Caselli et al. (2010; 2011, in prep.) toward the pre-stellar core L1544. These measurements are crucial to finally put constraints on poorly known parameters which regulate the chemistry of Oxygen: photodesorption and freeze-out- desorption rates. Such parameters are at the base of astrochemistry and their large uncertainties affect our interpretation of observations toward molecular clouds and star forming regions. Herschel OT2 is a unique chance to observe water vapor in regions not affected by protostellar feedback and with simple structure, two necessary conditions to obtain unambiguous results. Together with the existing Herschel data on L1544, the proposed observations will provide three detailed (legacy) studies aimed at exploring fundamental processes crucial for understanding Oxygen chemistry and for the overall interpretation of interstellar medium observations (including Herschel data).
Instrument HIFI_HifiPoint_dbs
Temporal Coverage 2012-08-29T19:52:11Z/2012-09-21T12:47:34Z
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 2013-03-20T21:18:27Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2013-03-20T21:18:27Z, OT2_pcaselli_7, SPG v14.1.0. https://doi.org/10.5270/esa-hfjor35