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Uncloaking Globular Clusters in the Inner Galaxy

Alonso-García, Javier and Mateo, Mario and Sen, Bodhisattva and Banerjee, Moulinath and Catelan, Márcio and Minniti, Dante and von Braun, Kaspar (2012) Uncloaking Globular Clusters in the Inner Galaxy. Astronomical Journal, 143 (3). Art. No. 70. ISSN 0004-6256.

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Extensive photometric studies of the globular clusters located toward the center of the Milky Way have been historically neglected. The presence of patchy differential reddening in front of these clusters has proven to be a significant obstacle to their detailed study. We present here a well defined and reasonably homogeneous photometric database for 25 of the brightest Galactic globular clusters located in the direction of the inner Galaxy. These data were obtained in the B, V, and I bands using the Magellan 6.5 m Telescope and the Hubble Space Telescope. A new technique is extensively used in this paper to map the differential reddening in the individual cluster fields, and to produce cleaner, dereddened color-magnitude diagrams for all the clusters in the database. Subsequent papers will detail the astrophysical analysis of the cluster populations, and the properties of the obscuring material along the clusters' lines of sight.

Item Type:Article
Related URLs:
URLURL TypeDescription
Alonso-García, Javier0000-0003-3496-3772
Catelan, Márcio0000-0001-6003-8877
Minniti, Dante0000-0002-7064-099X
von Braun, Kaspar0000-0002-5823-4630
Additional Information:© 2012 American Astronomical Society. Received 2011 November 2; accepted 2011 November 22; published 2012 February 10. Based partly on observations with the NASA/ESA Hubble Space Telescope, obtained at the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5-26555. This paper also includes data gathered with the 6.5 m Magellan Telescopes located at Las Campanas Observatory, Chile. This study was supported by grants 0206081 from NSF and GO10573.01-A from STScI. STScI is operated by NASA under contract to AURA. Support was also provided by the Ministry for the Economy, Development, and Tourism’s Programa Iniciativa Científica Milenio through grant P07-021-F, awarded to The Milky Way Millennium Nucleus, by Proyecto Fondecyt Regular 1110326, by Basal PFB-06, FONDAP 15010003, and Anillos ACT-86. This publication makes use of data products from the Two Micron All Sky Survey, which is a joint project of the University of Massachusetts and the Infrared Processing and Analysis Center/California Institute of Technology, funded by the National Aeronautics and Space Administration and the National Science Foundation. This research used the facilities of the Canadian Astronomy Data Centre operated by the National Research Council of Canada with the support of the Canadian Space Agency.
Funding AgencyGrant Number
NASANAS 5-26555
Ministry for the Economy, Development, and Tourism’s Programa Iniciativa Científica MilenioP07-021-F
Proyecto Fondecyt Regular1110326
Fondo de Financiamiento de Centros de Investigación en Áreas Prioritarias (FONDAP)15010003
Canadian Space Agency (CSA)UNSPECIFIED
Subject Keywords: dust, extinction; Galaxy: bulge; Galaxy: evolution; globular clusters: general; Hertzsprung-Russell and C-M diagrams; stars: horizontal-branch
Issue or Number:3
Record Number:CaltechAUTHORS:20120330-104523853
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Official Citation:Uncloaking Globular Clusters in the Inner Galaxy Javier Alonso-García et al. 2012 The Astronomical Journal 143 70
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:29912
Deposited By: Ruth Sustaita
Deposited On:30 Mar 2012 19:08
Last Modified:09 Mar 2020 13:18

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