Tucana dwarf galaxy VI photometry (Castellani+, 1996)

Details Tucana dwarf galaxy VI photometry (Castellani+, 1996) Tucana dwarf galaxy VI photometry (Castellani+, 1996)

Nov 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000ycat..33100715c&link_type=abstract

VizieR On-line Data Catalog: J/A+A/310/715. Originally published in: 1996A&A...310..715C

Other

Galaxies: Photometry, Photometry: Ccd

Scientific paper

We present deep CCD photometry for the dwarf galaxy in Tucana (l=323, b=-47.4). The data indicate that the galaxy is dominated by an intermediate/old stellar population with metallicity similar to that of the galactic globular clusters NGC 6752 and NGC 7089 (M2) (we find [Fe/H]=~-1.56). The distance modulus we derived, (m-M)V=~24.72+/-0.2, makes clear that this galaxy belongs to the Local Gro up. Tucana is clearly different from other dwarf galaxies, such as Leo I (Lee et al., 1993AJ....106.1420L), or Phoenix (Ortolani and Gratton, 1988PASP..100.1405O), because there is no evidence of a young stellar population (t<=5Gyrs) We suggest that the Tucana Galaxy is a genuine dwarf spheroidal in which no recent burst of star formation occurred. (1 data file).

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