| Name | DDT_kjusttan_3 |
| Title | Determination of the initial masses for extreme OH/IR stars using isotopologues of H2O |
| URL | http://archives.esac.esa.int/hsa/whsa-tap-server/data?retrieval_type=OBSERVATION&observation_id=1342271263&instrument_name=HIFI&product_level=LEVEL0&compress=true |
| DOI | https://doi.org/10.5270/esa-oyh9gfx |
| Author | justtanont, k. |
| Description | A subset of Asymptotic Giant Branch (AGB) stars loses mass at avery high rate. The dust effectively shields the radiation from thecentral star, allowing water-ice to condense onto existingsilicate grains. Through the mass loss process, these starsprovide a siginificant fraction to the gas and dust massreturn to the interstellar medium.These so-called extreme OH/IR stars are thought to originate fromstars with initial mass of 5 solar masses or more. These starsare expcted to experience the process of hot-bottom burning whichpreferentially synthesizes 13C and destroys 18O relative tothe more abundant isotope. From HIFI observations of two of theseobjects, we observed a lack of H2_18O in these objects.Our aim here is to underpin the hypothesis of the high-massprogenitor of these stars by observing three isotopologues of H2Ousing HIFI in six other similar objects. Herschel offers thelast opportunity to observe these lines for years to come. |
| Publication |
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| Instrument | HIFI_HifiPoint_dbs |
| Temporal Coverage | 2013-04-29T05:56:39Z/2013-04-29T08:03:34Z |
| 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 µm range, bridging the gap between earlier infrared space missions and groundbased facilities. |
| Creator Contact | https://support.cosmos.esa.int/h®erschel/ |
| Date Published | 2013-10-29T07:38:00Z |
| Last Update | 2025-01-24 |
| Keywords | Herschel, HSC, submillimetre, far-infrared, HIFI, PACS, SPIRE |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, justtanont et al., 2013, 'Determination of the initial masses for extreme OH/IR stars using isotopologues of H2O', SPG v14.1.0, European Space Agency, https://doi.org/10.5270/esa-oyh9gfx |