A dataset provided by the European Space Agency

Name OT2_plowranc_1
Title Testing the Proposed Model: Detecting Disks around Nearby Carbon Dwarfs
URL

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DOI 10.5270/esa-lqea647
Author lowrance, p.
Description With the discovery of G77-61 (Dahn et al. 1977) at a mere 58 pc and therefore relatively low luminosity, a category of dwarf carbon (dC) stars was finally recognized. This, however, presented a puzzle because a low mass star is incapable of the helium fusion needed to create the carbon seen in its atmosphere. A reolution was proposed and generally accepted a second member of a system could .dump. carbon on it through an AGB stage into a circumstellar disk which would replenish the fully convective atmosphere in a reasonable period. Current understanding of the formation and evolution of dC.s is, however, limited by the small number of objects and observations. We propose observations of each carbon dwarf with Herschel PACS 100-160 um, to to detect the proposed redsidual circumstellar disk. The proposed model for creating carbon dwarfs is based on three objects and the mechanism for dumping material on these low-mass stars and building the debris systems are currently unexplored. Thus the opportunity afforded by thisr program to add observational proof is valuable, especially for the very ill-studied carbon dwarfs. Only Herscehl can provide the spectral range and sensitivity to gain the observations needed in understanding the cold circumstellar disk and dissipation timescales around evolved stars placing carbon in our ISM - a building block of life as we know it.
Publication
Instrument PACS_PacsPhoto_largeScan
Temporal Coverage 2012-11-05T22:04:57Z/2013-01-27T17:09:25Z
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 ┬Ám range, bridging the gap between earlier infrared space missions and groundbased facilities.
Creator Contact https://support.cosmos.esa.int/herschel/
Date Published 2013-07-27T16:41:19Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2013-07-27T16:41:19Z, OT2_plowranc_1, SPG v14.2.0. https://doi.org/10.5270/esa-lqea647