| 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 micron forsterite dust feature of evolved stars. With the spectral resolution and sensitivity of PACS we are able to fit the profile of the forsterite feature which is very sensitive 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 olivine dust is purely Mg-rich and contains no iron. We find differences between the .outflow. sources and sources which have disks, likely indicating a different 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 from spherical symmetry or changes in mass loss history. With the new observations of a new set of 13 stars we want to substantiate our findings. The combination of SWS and PACS spectroscopy will provide a legacy dataset for future studies of crystalline dust. |
| Publication | THROES: a caTalogue of HeRschel Observations of Evolved Stars. I. PACS range spectroscopy . Ramos-Medina J. et al. . Astronomy & Astrophysics, Volume 611, id.A41, 38 pp. . 611 . 10.1051\/0004-6361\/201731940 . 2018A&A...611A..41R , PACS and SPIRE range spectroscopy of cool, evolved stars . Nicolaes D. et al. . Astronomy & Astrophysics, Volume 618, id.A143, 42 pp. . 618 . 10.1051\/0004-6361\/201833168 . 2018A&A...618A.143N , Herschel/PACS observations of the 69 μm band of crystalline olivine around evolved stars . Blommaert J. A. D. L. et al. . Astronomy & Astrophysics, Volume 565, id.A109, 16 pp. . 565 . 10.1051\/0004-6361\/201322554 . 2014A&A...565A.109B , The problematically short superwind of OH/IR stars. Probing the outflow with the 69 μm spectral band of forsterite . de Vries B. L. et al. . Astronomy & Astrophysics, Volume 561, id.A75, 14 pp. . 561 . 10.1051\/0004-6361\/201322546 . 2014A&A...561A..75D , |
| 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 |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, blommaert, j., 2013, OT2_jblommae_2, SPG v14.2.0, European Space Agency, https://doi.org/10.5270/esa-ol0w174 |