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Title: | Searching for the metal-weak thick disc in the solar neighbourhood |
Authors: | Reddy, B. E Lambert, D. L |
Keywords: | Stars: Abundances Stars: Atmospheres Stars: Kinematics Galaxy: Abundances Galaxy: Evolution |
Issue Date: | Nov-2008 |
Publisher: | Royal Astronomical Society |
Citation: | Monthly Notices of the Royal Astronomical Society, Vol. 391, No. 1, pp. 95 - 109 |
Abstract: | An abundance analysis is presented of 60 metal-poor stars drawn from catalogues of nearby stars provided by Arifyanto et al. and Schuster et al. In an attempt to isolate a sample of metal-weak thick disc stars, we applied the kinematic criteria V/subrot >= 100kms/sup -1,|U/sub LSR| <= 140kms/sup-1 (LSR - local standard of rest) and |W/sub LSR| <= 100kms/sup -1. 14 stars satisfying these criteria and having [Fe/H] <= -1.0 are included in the sample of 60 stars. Eight of the 14 have [Fe/H] >= -1.3 and may be simply thick disc stars of slightly lower than average [Fe/H]. The other six have [Fe/H] from -1.3 to -2.3 and are either metal-weak thick disc stars or halo stars with kinematics mimicking those of the thick disc. The sample of 60 stars is completed by eight thick disc stars, 20 stars of a hybrid nature (halo or thick disc stars) and 18 stars with kinematics distinctive of the halo. |
URI: | http://hdl.handle.net/2248/4442 |
ISSN: | 0035-8711 |
Appears in Collections: | IIAP Publications |
Files in This Item:
File | Description | Size | Format | |
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Searching for the metal-weak thick disc in the solar neighbourhood | 1.33 MB | Adobe PDF | ![]() View/Open |
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