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A Status Report on the 0Z Project

Cohen, Judith G. and Christlieb, Norbert and McWilliam, Andrew and Shectman, Stephen and Thompson, Ian (2011) A Status Report on the 0Z Project. . (Unpublished) http://resolver.caltech.edu/CaltechAUTHORS:20190521-161942082

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Abstract

We present an update on the status of the 0Z Survey, an effort to datamine the Hamburg/ESO Survey to find and study in detail a large sample of extremely metal-poor Galactic halo field stars with [Fe/H] < -3 dex. After searching 1,565 moderate resolution spectra of candidates selected from the HES, we have acquired high resolution spectra of 103 of the most metal-poor of them. Detailed abundance analyses have been performed for all these stars. This has resulted in the discovery of 18 new stars below [Fe/H] -3.5 dex and 57 below -3.0 dex. Some results are presented regarding our search for outliers in chemical abundances of particular species among the sample of 103 stars. Ignoring C and N, about 15% of the sample are "abnormal" in some way. Our plans to complete this project and write the final set of papers are described.


Item Type:Report or Paper (Discussion Paper)
Related URLs:
URLURL TypeDescription
http://arxiv.org/abs/1105.1126arXivDiscussion Paper
ORCID:
AuthorORCID
Cohen, Judith G.0000-0002-8039-4673
Christlieb, Norbert0000-0002-4043-2727
Additional Information:We are very grateful to the Palomar, Las Campanas, and Keck time allocation committees for their long-term support of this campaign during the initial phase of moderate resolution spectroscopy which began began in 2000 and ended in 2006 as well as the subsequent high resolution spectroscopy. J. Cohen acknowledges partial support from NSF grants AST–0507219 and AST–0908139. We are grateful to the many people who have worked to make the Keck Telescope and its instruments a reality and to operate and maintain the Keck Observatory. The authors wish to extend special thanks to those of Hawaiian ancestry on whose sacred mountain we are privileged to be guests. Without their generous hospitality, none of the observations presented herein would have been possible.
Funders:
Funding AgencyGrant Number
NSFAST-0507219
NSFAST-0908139
Record Number:CaltechAUTHORS:20190521-161942082
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20190521-161942082
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:95658
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:21 May 2019 23:45
Last Modified:21 May 2019 23:45

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