Published October 1985 | Version v1
Journal article Metadata-only

Main-sequence turnoff of the Draco dwarf galaxy

Creators

  • 1. Victoria Univ., Canada
  • 2. Dominion Astrophysical Observatory, Victoria, Canada

Description

Deep photometry on the B,V system for 182 stars in the dwarf spheroidal galaxy in Draco was obtained with a CCD camera at the Cassegrain focus of the Canada-France-Hawaii 3.6-m telescope. Draco's main-sequence turnoff if found near V(to) = 23.5, which is about 3.4 magnitudes below the galaxy's horizontal branch. This leads to the interpretation that Draco is not measurably younger than the clusters or Ursa Minor: the age of Draco is about 18 Gyr according to current star-revolution chronologies. No blue stragglers are definitely detected in Draco, and it is concluded that any young population in Draco probably represents less than 10 percent of the total. 30 references

Additional details

Publishing Information

Journal Title
Publ. Astron. Soc. Pac.
Journal Volume
97
Series
Publ. Astron. Soc. Pac.
Journal Page Range
908-923
ISSN
0004-6280
CODEN
PASPA

INIS

Country of Publication
United States
Country of Input or Organization
United States
INIS RN
17075613
Subject category
S79: ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; S79: ASTROPHYSICS, COSMOLOGY AND ASTRONOMY;
Resource subtype / Literary indicator
Numerical Data
Descriptors DEI
AGE ESTIMATION; GALAXIES; MAIN SEQUENCE STARS; STAR CLUSTERS; THEORETICAL DATA
Descriptors DEC
DATA; INFORMATION; NUMERICAL DATA; STARS