| Name | OT1_cthum_1 |
| Title | The neutral disk of MWC349 |
| URL | http://archives.esac.esa.int/hsa/whsa-tap-server/data?retrieval_type=OBSERVATION&observation_id=1342221684&instrument_name=PACS&product_level=LEVEL0&compress=true |
| DOI | https://doi.org/10.5270/esa-xxvvo55 |
| Author | thum, c. |
| Description | We wish to study the circumstellar disk of the bright radiostar MWC349with the aim to infer the evolutionary state of this prominent butenigmatic massive stellar object. We propose to make a full wavelengthrange scan with PACS and with the SPIRE spectrometer in order todetermine the continuum spectrum of the disk, especially in the ill determined orunexplored wavelength region centered on 200-300 microns where theemission from the ionized wind and the warm circumstellar dust arecomparably strong.These spectral scans are at least 10x more sensitive than our ISOdata, and permit a deep search for molecules like water and CO.The presence of water which is being found by Herschel in a range ofaccretion disks young stellar objects would be strong evidence forthe nature of the MWC349 disk as due to accretion, whereas the absenceof water is most easily explained if the disk results from mass loss in a strong stellar wind or ejection event. Our proposed investigationhas thus the potential to resolve the half--century old question aboutthe evolutionary state of MWC349. |
| Publication |
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| Instrument | SPIRE_SpireSpectrometer_, PACS_PacsRangeSpec_point, SPIRE_SpirePhoto_small |
| Temporal Coverage | 2011-05-25T14:35:57Z/2011-12-11T20:36:31Z |
| Version | SPG v14.2.0 |
| 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 | 2012-06-11T17:25:09Z |
| Keywords | Herschel, HSC, submillimetre, far-infrared, HIFI, PACS, SPIRE |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, thum et al., 2012, 'The neutral disk of MWC349', SPG v14.2.0, European Space Agency, https://doi.org/10.5270/esa-xxvvo55 |