Please use this identifier to cite or link to this item: http://hdl.handle.net/2248/4734
Title: Low-resolution spectroscopy of high galactic latitude objects: a search for CH stars
Authors: Goswami, A
Bama, P
Shantikumar, N. S
Devassy, D
Keywords: Stars: CH Stars;Variable: Carbon;Stars: Spectral Characteristics;Stars: AGB;Stars: Population II
Issue Date: Sep-2007
Publisher: Astronomical Society of India
Citation: Bulletin of the Astronomical Society of India, Vol. 35, No. 3, pp. 339 - 357
Abstract: Properties of CH stars like iron deficiency and enrichment of carbon and heavy elements can provide valuable inputs to our understanding of nucleosynthesis. In particular, these parameters provide strong observational constraints for theoretical studies of nucleosynthesis of heavy elements at low- metallicity. Accurate identification and spectroscopic characterization of CH stars are therefore very essential. We have undertaken a programme with a prime ob jective to search for these ob jects in a mixed sample of carbon stars taken from Hamburg/ESO survey. The spectra of the ob jects were obtained using OMR at VBO, Kavalur and HFOSC at HCT, IAO, Hanle, during 2005 and 2006. Here, we report a detection of twenty-one CH stars from a sample of sixty ob jects based on low-resolution spectral analysis. Estimated effective temperatures, 12 C/13 C isotopic ratios, and their location in the two colour J-H vs H-K plot support their identification with the class of CH stars. Detection of these potential CH star candidates and their spectral description is the main theme of this paper.
URI: http://hdl.handle.net/2248/4734
ISSN: 0304-9523
???metadata.dc.rights???: © Astronomical Society of India
???metadata.dc.relation.uri???: http://www.ncra.tifr.res.in/~basi/07September/Abstracts/353392007.htm
Appears in Collections:Publications based on data from IAO, Hanle
BASI Publications
IIAP Publications

Files in This Item:
File Description SizeFormat 
Low-resolution spectroscopy of high Galactic latitude objects546.17 kBAdobe PDFView/Open


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.