The distance modulus of the Large Magellanic Cloud - Evidence from colour-magnitude diagrams of old clusters

Details The distance modulus of the Large Magellanic Cloud - Evidence from colour-magnitude diagrams of old clusters The distance modulus of the Large Magellanic Cloud - Evidence from colour-magnitude diagrams of old clusters

Sep 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985a%26a...150l..12a&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 150, no. 1, Sept. 1985, p. L12-L14.

Astronomy and Astrophysics

Astrophysics

22

Astrometry, Color-Magnitude Diagram, Globular Clusters, Magellanic Clouds, Distance, Electronography, Main Sequence Stars, Stellar Evolution

Scientific paper

A new electronographic determination of the color-magnitude diagram of the old LMC cluster NGC 2210 agrees with that of Hodge 11 (Andersen et al., 1984) in yielding a distance modulus to the LMC of (m-M)0 = 18.1. Together with several older and recent independent lines of evidence, this result favors the 'short' distance modulus of the LMC. The electronographic color-magnitude diagram of NGC 1841 presented here yields the more conventional value (m-M)0 = 18.7, in agreement with that determined for the LMC from Cepheids (Feast, 1984; Visvanathan, 1985), but this cluster is quite distant from the LMC itself. It is concluded that the present controversy over the distance of the LMC is more likely to be settled by direct main-sequence fitting for young, rather than old, LMC clusters in order to circumvent the calibration problems associated with evolved distance indicators such as Cepheids or RR Lyraes.

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