CCD photometry of Large Magellanic Cloud clusters. II - The intermediate-age cluster H4

Details CCD photometry of Large Magellanic Cloud clusters. II - The intermediate-age cluster H4 CCD photometry of Large Magellanic Cloud clusters. II - The intermediate-age cluster H4

Apr 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986apjs...60..893m&link_type=abstract

Astrophysical Journal Supplement Series (ISSN 0067-0049), vol. 60, April 1986, p. 893-937.

Astronomy and Astrophysics

Astrophysics

63

Charge Coupled Devices, Magellanic Clouds, Star Clusters, Stellar Spectrophotometry, Color-Magnitude Diagram, Stellar Color, Stellar Evolution, Stellar Motions, Tables (Data), Ubv Spectra

Scientific paper

UBVR CCD frames of the LMC star cluster H4 have resulted in V, (B-V), and/or (V-R) photometry of 3096 stars and (U-B) colors of 310 stars. It is concluded that (1) (m-M)0 = 18.1±0.3 on the basis of comparisons with NGC 2420 and the theoretical isochrones of VandenBerg; (2) E(B-V) = 0.07±0.03; (3) [Fe/H] = -0.7±0.3; (4) the age of H4 is (2.5±0.4)x109yr using the present modulus, or (1.5±0.3)x109yr for (m-M)0,LMC = 18.7; (5) the cluster seems to be dynamically relaxed; and (6) the field stars around H4 range in age from ⪉0.6x109 to ⪆5x109yr.

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