| Name | OT2_jblommae_2 |
| Title | Study of the cool forsterite dust around evolved stars |
| URL | http://archives.esac.esa.int/hsa/whsa-tap-server/data?retrieval_type=OBSERVATION&observation_id=1342242438&instrument_name=PACS&product_level=LEVEL0&compress=true |
| DOI | https://doi.org/10.5270/esa-ol0w174 |
| Author | blommaert, j. |
| Description | We propose to perform PACS range spectroscopy around the 69 micronforsterite dust feature of evolved stars. With the spectral resolutionand sensitivity of PACS weare able to fit the profile of the forsterite feature which is verysensitive to temperature and composition of the grain. Based on a sample, observed in earlier GT programmes, of about 15 evolved stars, including OH/IR stars, post-AGB and PNs, we find that the olivinedust is purely Mg-rich and contains no iron. We find differences betweenthe outflow sources and sources which have disks, likely indicating adifferent formation history. The modelling of the mid-infrared bands (observed with SWS) in combination of the 69 micron band of the heavily obscured OH/IR stars allows to study the dust distribution and search for deviations fromspherical symmetry or changes in mass loss history. With the new observations of a new set of 13 stars we want to substantiate ourfindings. The combination of SWS and PACS spectroscopy will provide a legacydataset for future studies of crystalline dust. |
| Publication |
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| Instrument | PACS_PacsRangeSpec_point |
| Temporal Coverage | 2012-03-26T00:24:48Z/2012-10-05T00:29:21Z |
| 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 | 2013-04-05T00:19:44Z |
| Last Update | 2026-03-02 |
| Keywords | Herschel Space Observatory data, ESA Herschel mission dataset, far-infrared astronomy observations, submillimeter astronomy data, infrared space telescope observations, PACS photometer data, PACS spectrometer data, SPIRE photometer data, SPIRE Fourier transform spectrometer data, HIFI heterodyne spectroscopy data, far-infrared spectroscopy dataset, submillimeter spectral line observations, cold universe observations dataset, star formation infrared data, molecular cloud far-infrared observations, interstellar medium spectroscopy data, protoplanetary disk infrared observations, galaxy evolution far-infrared data, dust emission submillimeter observations, cosmic infrared background measurements, extragalactic infrared survey data, calibrated level 2 data products, FITS files astronomy, spectral cubes far-infrared, flux-calibrated maps, continuum photometry data, spectral energy distribution measurements, ESA Herschel Science Archive data |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, blommaert et al., 2013, 'Study of the cool forsterite dust around evolved stars', SPG v14.2.0, European Space Agency, https://doi.org/10.5270/esa-ol0w174 |