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Leo I - The youngest Milky Way dwarf spheroidal galaxy?Deep CCD photometry of about 16,000 stars in the Milky Way's Leo I spheroidal galaxy satellite is reported. An account is given of the features observed in the color-magnitude diagrams (CMDs) derived therefrom. A very blue and well-defined red giant branch (RGB) is noted. The CMDs of Leo I shows about 50 anomalous Cepheid candidates; there are another 50 or so asymptotic giant branch stars above the tip of the RGB, including 15 known carbon stars. The mean color of the RGB is estimated at M sub I = -3.5 mag.
Document ID
19940033948
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Lee, Myung G.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Freedman, Wendy
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Mateo, Mario
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Thompson, Ian
(Carnegie Institution of Washington, Observatories, Pasadena CA, United States)
Roth, Miguel
(Las Campanas Observatory La Serena, Chile)
Ruiz, Maria-Teresa
(Univ. de Chile Santiago, United States)
Date Acquired
August 16, 2013
Publication Date
October 1, 1993
Publication Information
Publication: Astronomical Journal
Volume: 106
Issue: 4
ISSN: 0004-6256
Subject Category
Astrophysics
Accession Number
94A10603
Funding Number(s)
CONTRACT_GRANT: NSF AST-83-18504
CONTRACT_GRANT: NSF AST-91-16496
CONTRACT_GRANT: NSF AST-87-13889
CONTRACT_GRANT: NAS5-26555
CONTRACT_GRANT: NSF AST-91-15150
Distribution Limits
Public
Copyright
Other

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