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http://hdl.handle.net/2248/6387
Title: | Spectroscopic charaterization of FHLC stars from the Hamburg/ESO survey and a newly found HdC star |
Authors: | Goswami, A |
Keywords: | Stars: carbon Stars: Late-type Stars: HdC Stars: spectral characteristics |
Issue Date: | 2012 |
Publisher: | Astronomical Society of India |
Citation: | ASI Conference Series, Vol. 6, pp. 189-195 |
Abstract: | The sample of candidate faint high latitude carbon (FHLC) stars chosen from the Hamburg/ESO survey is a potential source to search for objects of rare types. From medium resolution spectral analyses of about 250 objects from this sample, the object HE 1015-2050, was found to be a hydrogen-deficient carbon (HdC) star. Apart from U Aquarii, HE 1015-2050 is the only example, till now, of a Galactic cool HdC star that is characterized by strong spectral features of light s-process element Sr, and weak features of heavy s-process elements such as Ba. This object, with its enhanced carbon and hydrogen-deficiency, together with anomalous s-process spectral features, poses a challenge as far as the understanding of its formation mechanism is concerned. We discuss possible mechanisms for its formation in the framework of existing scenarios of HdC star formation. |
Description: | Open Access |
URI: | http://hdl.handle.net/2248/6387 |
ISBN: | 978-81-922926-4-9 |
Appears in Collections: | IIAP Publications |
Files in This Item:
File | Description | Size | Format | |
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Spectroscopic charaterization of FHLC stars.pdf | 1.02 MB | Adobe PDF | ![]() View/Open |
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