Deep photometry of globular clusters. VI - E2 and E3

Details Deep photometry of globular clusters. VI - E2 and E3 Deep photometry of globular clusters. VI - E2 and E3

Feb 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26as...67..373g&link_type=abstract

Astronomy and Astrophysics Supplement Series (ISSN 0365-0138), vol. 67, no. 3, Feb. 1987, p. 373-393.

Astronomy and Astrophysics

Astrophysics

13

Astronomical Photometry, Globular Clusters, Charge Coupled Devices, Magellanic Clouds, Open Clusters, Stellar Evolution, Stellar Spectrophotometry

Scientific paper

CCD photometry for the star clusters E2 and E3 is presented. Data for E3 are compared with other CCD photometries. Turn-off points are observed and main sequences are followed for about three magnitudes in both clusters. The C-M diagrams are rather different: E3 is a very star-poor globular cluster at (m-M)0 ≡ 14.2. E2 closely resembles the galactic cluster NGC 2158. It is thus identified as an open cluster about 2 Gyrs old in the halo of the Large Magellanic Cloud. The distance modulus is (m-M)V = 18.5±0.2; assuming a reddening E(B-V) = 0.06, a distance of 46±5 kpc is obtained. The possible presence of gaps in the E3 C-M diagrams is briefly discussed in connection with stellar evolutionary theory. A group of possible blue stragglers and the intrinsic broadening of the E3 main sequence are briefly commented on.

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