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Oxygen abundance of gamma Vel from [O III] 88um Herschel/PACS spectroscopy
Paul A Crowther, M J Barlow, P Royer +4
We present Herschel PACS spectroscopy of the [O III] 88.4um fine-structure line in the nearby WC8+O binary system gamma Vel to determine its oxygen abundance. The critical density…
PACS and SPIRE range spectroscopy of cool, evolved stars
Dries Nicolaes, M. A. T. Groenewegen, P. Royer +3
Context: At the end of their lives AGB stars are prolific producers of dust and gas. The details of this mass-loss process are still not understood very well. Herschel PACS and SPI…
Evolutionary status of the Of?p star HD148937 and of its surrounding nebula NGC6164/5
L. Mahy, D. Hutsemékers, Y. Nazé +3
Aims. The magnetic star HD148937 is the only Galactic Of?p star surrounded by a nebula. The structure of this nebula is particularly complex and is composed, from the center out ou…
Tracing back the evolution of the candidate LBV HD168625
L. Mahy, D. Hutsemékers, P. Royer +1
Aims. We obtained Herschel/PACS imaging and spectroscopic observations of the nebula surrounding the candidate LBV HD168625. By combining these data with optical spectra of the sta…
Herschel observations of the nebula M1-67 around the Wolf-Rayet star WR 124
C. Vamvatira-Nakou, D. Hutsemekers, P. Royer +3
Infrared Herschel imaging and spectroscopic observations of the nebula M1-67 around the Wolf-Rayet star WR 124 have been obtained along with optical imaging observations. The infra…
Herschel spectral-mapping of the Helix Nebula (NGC 7293): Extended CO photodissociation and OH+ emission
M. Etxaluze, J. Cernicharo, J. R. Goicoechea +13
The Helix Nebula (NGC 7293) is the closest planetary nebulae. Therefore, it is an ideal template for photochemical studies at small spatial scales in planetary nebulae. We aim to s…