A dataset provided by the European Space Agency

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
http://archives.esac.esa.int/hsa/whsa-tap-server/data?retrieval_type=OBSERVATION&observation_id=1342221684&instrument_name=SPIRE&product_level=LEVEL0&compress=true
http://archives.esac.esa.int/hsa/whsa-tap-server/data?retrieval_type=OBSERVATION&observation_id=1342231334&instrument_name=SPIRE&product_level=LEVEL0&compress=true
http://archives.esac.esa.int/hsa/whsa-tap-server/data?retrieval_type=OBSERVATION&observation_id=1342231334&instrument_name=PACS&product_level=LEVEL0&compress=true
http://archives.esac.esa.int/hsa/whsa-tap-server/data?retrieval_type=OBSERVATION&observation_id=1342234051&instrument_name=SPIRE&product_level=LEVEL0&compress=true
http://archives.esac.esa.int/hsa/whsa-tap-server/data?retrieval_type=OBSERVATION&observation_id=1342234051&instrument_name=PACS&product_level=LEVEL0&compress=true
http://archives.esac.esa.int/hsa/whsa-tap-server/data?retrieval_type=OBSERVATION&observation_id=1342234053&instrument_name=SPIRE&product_level=LEVEL0&compress=true
http://archives.esac.esa.int/hsa/whsa-tap-server/data?retrieval_type=OBSERVATION&observation_id=1342234053&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 MWC349
with the aim to infer the evolutionary state of this prominent but
enigmatic massive stellar object. We propose to make a full wavelength
range scan with PACS and with the SPIRE spectrometer in order to
determine the continuum spectrum of the disk, especially in the ill determined or
unexplored wavelength region centered on 200-300 microns where the
emission from the ionized wind and the warm circumstellar dust are
comparably strong.

These spectral scans are at least 10x more sensitive than our ISO
data, and permit a deep search for molecules like water and CO.
The presence of water which is being found by Herschel in a range of
accretion disks young stellar objects would be strong evidence for
the nature of the MWC349 disk as due to accretion, whereas the absence
of water is most easily explained if the disk results from mass loss in
a strong stellar wind or ejection event. Our proposed investigation
has thus the potential to resolve the half--century old question about
the evolutionary state of MWC349.
Publication The Herschel SPIRE Fourier Transform Spectrometer Spectral Feature Finder - II. Estimating radial velocity of SPIRE spectral observation sources . Scott Jeremy P. et al. . Monthly Notices of the Royal Astronomical Society . null . null . 2020MNRAS.496.4894S ,
The Herschel SPIRE Fourier Transform Spectrometer Spectral Feature Finder - III. Line identification and off-axis spectra . Benson Chris S. et al. . Monthly Notices of the Royal Astronomical Society . null . null . 2020MNRAS.496.4906B ,
The Herschel SPIRE Fourier Transform Spectrometer Spectral Feature Finder I. The Spectral Feature Finder and Catalogue . Hopwood R. et al. . Monthly Notices of the Royal Astronomical Society . null . null . 2020MNRAS.496.4874H ,
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
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, thum, c., 2012, OT1_cthum_1, SPG v14.2.0, European Space Agency, https://doi.org/10.5270/esa-xxvvo55