| Name | OT1_csanch01_1 |
| Title | Molecular complexity of the O-rich pre-Planetary Nebula OH231.8 |
| URL | http://archives.esac.esa.int/hsa/whsa-tap-server/data?retrieval_type=OBSERVATION&observation_id=1342231503&instrument_name=HIFI&product_level=LEVEL0&compress=true |
| DOI | https://doi.org/10.5270/esa-0mlcgeb |
| Author | sanchez contreras, c. |
| Description | Envelopes around evolved stars are extraordinarily efficient factories of complex molecules and dust particles that will eventually enrichthe ISM. To date, most chemistry studies have focused on C-richenvelopes, expected to show the largest molecular variety andabundances. Recent observations suggest that O-rich shells may be aschemically diverse as their Carbon counterparts, however, no seriousattempt has been made yet to perform a full frequency scan of suchobjects. We propose to carry out a line survey with HIFI of the wellknown, O-rich pre-PN OH 231.8, which displays fast (>400 km/s),bipolar outflows and a molecular richness unparalleled amongst O-richAGB and post-AGB stars. Results from our exploratory mm line surveywith the IRAM 30 m antenna of this object has led to the detection ofhundreds of lines from different species that clearly point tonon-equilibrium/shock-induced molecule formation processes in the fastflow. The HIFI could be potentially effective to reveal the dense andwarm regions near the centre, which is strongly affected by shocks.At its completion, this project will provide the sorely neededmolecular inventory and abundance measurements in O-rich CSEs, which are required to obtain a better understanding of the intricate,non-equilibrium molecule formation processes in O-rich environments.We will use our radiative transfer and chemistry models to reproducethe observed spectra and empirically derived abundances, respectively,and constrain the nebular physical and chemical conditions in theenvelope of OH231. |
| Publication |
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| Instrument | HIFI_HifiFS_freq |
| Temporal Coverage | 2011-10-26T17:46:47Z/2012-05-04T13:27:49Z |
| 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 | 2012-11-04T11:07:11Z |
| 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, sanchez contreras et al., 2012, 'Molecular complexity of the O-rich pre-Planetary Nebula OH231.8', SPG v14.1.0, European Space Agency, https://doi.org/10.5270/esa-0mlcgeb |