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Broadband UBVRCIC p...
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Beers, Timothy C.
(author)
Broadband UBVRCIC photometry of horizontal-branch and metal-poor candidates from the HK and Hamburg/ESO surveys. I.
- Article/chapterEnglish2007
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American Astronomical Society,2007
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LIBRIS-ID:oai:DiVA.org:uu-146642
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https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-146642URI
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https://doi.org/10.1086/509324DOI
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https://lup.lub.lu.se/record/679586URI
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Language:English
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Summary in:English
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Subject category:ref swepub-contenttype
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Subject category:art swepub-publicationtype
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We report broadband UBV and/or BVRCIC CCD photometry for a total of 1857 stars in the thick-disk and halo populations of the Galaxy. The majority of our targets were selected as candidate field horizontal-branch or other A-type stars (FHB/ A, N = 576), or candidate low-metallicity stars (N = 1221), from the HK and Hamburg/ESO objective-prism surveys. Similar data for a small number of additional stars from other samples are also reported. These data are being used for several purposes. In the case of the FHB/ A candidates they are used to accurately separate the lower gravity FHB stars from various higher gravity A-type stars, a subsample that includes the so-called blue metal poor stars, halo and thick-disk blue stragglers, main-sequence A-type dwarfs, and Am and Ap stars. These data are also being used to derive photometric distance estimates to high-velocity hydrogen clouds in the Galaxy and for improved measurements of the mass of the Galaxy. Photometric data for the metal-poor candidates are being used to refine estimates of stellar metallicity for objects with available medium-resolution spectroscopy, to obtain distance estimates for kinematic analyses, and to establish initial estimates of effective temperature for analysis of high-resolution spectroscopy of the stars for which this information now exists.
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Flynn, Chris
(author)
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Rossi, Silvia
(author)
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Sommer-Larsen, Jesper
(author)
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Wilhelm, Ronald
(author)
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Marsteller, Brian
(author)
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Lee, Young Sun
(author)
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De Lee, Nathan
(author)
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Krugler, Julie
(author)
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Deliyannis, Constantine P.
(author)
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Simmons, Andrew T.
(author)
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Mills, Elisabeth
(author)
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Zickgraf, Franz-Josef
(author)
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Holmberg, Johan
(author)
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Önehag, AnnaUppsala universitet,Institutionen för astronomi och rymdfysik
(author)
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Eriksson, AndersUppsala universitet,Institutionen för astronomi och rymdfysik(Swepub:uu)andeerik
(author)
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Terndrup, Donald M.
(author)
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Salim, Samir
(author)
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Andersen, Johannes
(author)
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Nordström, BirgittaLund University,Lunds universitet,Astronomi - Genomgår omorganisation,Institutionen för astronomi och teoretisk fysik - Genomgår omorganisation,Naturvetenskapliga fakulteten,Lund Observatory - Undergoing reorganization,Department of Astronomy and Theoretical Physics - Undergoing reorganization,Faculty of Science(Swepub:lu)astr-bno
(author)
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Christlieb, NorbertUppsala universitet,Institutionen för astronomi och rymdfysik
(author)
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Frebel, Anna
(author)
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Rhee, Jaehyon
(author)
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Uppsala universitetInstitutionen för astronomi och rymdfysik
(creator_code:org_t)
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In:Astrophysical Journal Supplement Series: American Astronomical Society168:1, s. 128-1390067-00491538-4365
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Beers, Timothy C ...
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Flynn, Chris
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Rossi, Silvia
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Sommer-Larsen, J ...
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Wilhelm, Ronald
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Marsteller, Bria ...
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Lee, Young Sun
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De Lee, Nathan
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Krugler, Julie
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Deliyannis, Cons ...
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Simmons, Andrew ...
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Mills, Elisabeth
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Zickgraf, Franz- ...
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Holmberg, Johan
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Önehag, Anna
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Eriksson, Anders
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Terndrup, Donald ...
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Salim, Samir
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Andersen, Johann ...
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Nordström, Birgi ...
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Christlieb, Norb ...
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Frebel, Anna
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Rhee, Jaehyon
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