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Broadband UBVR C I C Photometry of Horizontal-branch and Metal-poor Candidates from the HK and Hamburg/ESO Surveys. I

Beers, Timothy C; Flynn, Chris; Rossi, Silvia; Sommer-Larsen, Jesper; Wilhelm, Ronald; Marsteller, Brian; Sun Lee, Young; De Lee, Nathan; Krugler, Julie; Deliyannis, C P; Simmons, Andrew T.; Mills, Elisabeth; Zickgraf, F-J; Holmberg, Johan; Frebel, Anna

Description

We report broadband UBVand/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...[Show more]

dc.contributor.authorBeers, Timothy C
dc.contributor.authorFlynn, Chris
dc.contributor.authorRossi, Silvia
dc.contributor.authorSommer-Larsen, Jesper
dc.contributor.authorWilhelm, Ronald
dc.contributor.authorMarsteller, Brian
dc.contributor.authorSun Lee, Young
dc.contributor.authorDe Lee, Nathan
dc.contributor.authorKrugler, Julie
dc.contributor.authorDeliyannis, C P
dc.contributor.authorSimmons, Andrew T.
dc.contributor.authorMills, Elisabeth
dc.contributor.authorZickgraf, F-J
dc.contributor.authorHolmberg, Johan
dc.contributor.authorFrebel, Anna
dc.date.accessioned2015-12-08T22:48:19Z
dc.identifier.issn0004-637X
dc.identifier.urihttp://hdl.handle.net/1885/38286
dc.description.abstractWe report broadband UBVand/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.
dc.publisherIOP Publishing
dc.sourceAstrophysical Journal, The
dc.subjectKeywords: Stars: early-type; Stars: horizontal-branch; Stars: Population II; Techniques: photometric
dc.titleBroadband UBVR C I C Photometry of Horizontal-branch and Metal-poor Candidates from the HK and Hamburg/ESO Surveys. I
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume168
dc.date.issued2007
local.identifier.absfor020110 - Stellar Astronomy and Planetary Systems
local.identifier.ariespublicationu3379551xPUB160
local.type.statusPublished Version
local.contributor.affiliationBeers, Timothy C, Michigan State University
local.contributor.affiliationFlynn, Chris, Tuorla Observatory
local.contributor.affiliationRossi, Silvia, Universidade de Sao Paulo
local.contributor.affiliationSommer-Larsen, Jesper, University of Copenhagen
local.contributor.affiliationWilhelm, Ronald, Texas Tech University
local.contributor.affiliationMarsteller, Brian, Michigan State University
local.contributor.affiliationSun Lee, Young, Michigan State University
local.contributor.affiliationDe Lee, Nathan, Michigan State University
local.contributor.affiliationKrugler, Julie, Michigan State University
local.contributor.affiliationDeliyannis, C P, Indiana University
local.contributor.affiliationSimmons, Andrew T., Indiana University
local.contributor.affiliationMills, Elisabeth, Indiana University
local.contributor.affiliationZickgraf, F-J, University of Hamburg
local.contributor.affiliationHolmberg, Johan, Max Planck Institute for Astonomy
local.contributor.affiliationFrebel, Anna, College of Physical and Mathematical Sciences, ANU
local.description.embargo2037-12-31
local.bibliographicCitation.startpage128
local.bibliographicCitation.lastpage139
local.identifier.doi10.1086/509324
local.identifier.absseo970102 - Expanding Knowledge in the Physical Sciences
dc.date.updated2015-12-08T11:05:12Z
local.identifier.scopusID2-s2.0-33846810079
CollectionsANU Research Publications

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