A dataset provided by the European Space Agency

Name OT2_edebeck_2
Title When twins are not identical: a HIFI scan of IRAS15194-5115, the stellar twin of IRC+10216
URL

http://archives.esac.esa.int/hsa/whsa-tap-server/data?retrieval_type=OBSERVATION&observation_id=1342250680&instrument_name=HIFI&product_level=LEVEL0&compress=true
http://archives.esac.esa.int/hsa/whsa-tap-server/data?retrieval_type=OBSERVATION&observation_id=1342250707&instrument_name=HIFI&product_level=LEVEL0&compress=true
http://archives.esac.esa.int/hsa/whsa-tap-server/data?retrieval_type=OBSERVATION&observation_id=1342250735&instrument_name=HIFI&product_level=LEVEL0&compress=true
http://archives.esac.esa.int/hsa/whsa-tap-server/data?retrieval_type=OBSERVATION&observation_id=1342251014&instrument_name=HIFI&product_level=LEVEL0&compress=true
http://archives.esac.esa.int/hsa/whsa-tap-server/data?retrieval_type=OBSERVATION&observation_id=1342251100&instrument_name=HIFI&product_level=LEVEL0&compress=true
http://archives.esac.esa.int/hsa/whsa-tap-server/data?retrieval_type=OBSERVATION&observation_id=1342251111&instrument_name=HIFI&product_level=LEVEL0&compress=true
http://archives.esac.esa.int/hsa/whsa-tap-server/data?retrieval_type=OBSERVATION&observation_id=1342251209&instrument_name=HIFI&product_level=LEVEL0&compress=true
http://archives.esac.esa.int/hsa/whsa-tap-server/data?retrieval_type=OBSERVATION&observation_id=1342251491&instrument_name=HIFI&product_level=LEVEL0&compress=true

DOI 10.5270/esa-ttrm6vy
Author de beck, e.
Description Currently, our knowledge of the chemistry occurring in the stellar atmospheres and circumstellar envelopes of AGB stars is far from being complete. A most powerful method to study the circumstellar chemistry is broadband spectral scans of individual sources. We propose here to perform a spectral scan of the high mass-loss rate carbon star IRAS15194-5115 in selected HIFI bands. Lines will be identified and radiative transfer modelling will be performed for most of the detected species to provide circumstellar abundances and isotope ratios. The results will be compared with those of similar spectral scans of other types of evolved objects, in particular IRC+10216, to address the efficiency of various chemical processes and their dependence on the evolution of the object. A comparison between isotope ratios determined for IRAS15194-5115 and IRC+10216 will be of special interest since these stars have most likely taken different evolutionary paths along the AGB. The proposed observations will improve our understanding of AGB stars and their role in the chemical evolution of galaxies.
Publication
Instrument HIFI_HifiFS_freq
Temporal Coverage 2012-09-05T20:05:52Z/2012-09-22T02:57:52Z
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 2013-03-21T20:40:47Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2013-03-21T20:40:47Z, OT2_edebeck_2, SPG v14.1.0. https://doi.org/10.5270/esa-ttrm6vy