A review of the distance and structure of the Large Magellanic Cloud |
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Affiliation: | 1. Division of Pediatric Neurology, Department of Pediatrics, Case Western Reserve University, Cleveland, OH 44116, USA;2. Department of Physiology and Biophysics, Case Western Reserve University, Cleveland, OH 44116, USA;3. Department of Psychiatry, Case Western Reserve University, Cleveland, OH 44116, USA;4. Department of Biochemistry, Nencki Institute of Experimental Biology, 02-093 Warsaw, Poland |
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Abstract: | The average of 14 recent measurements of the distance to the Large Magellanic Cloud (LMC) implies a true modulus of 18.50 ± 0.02 mag, and demonstrates a trend in the past 2 years of convergence toward a standard value. The distance indicators reviewed are the red clump, the tip of the red giant branch, Cepheid, RR Lyrae, and Mira variable stars, cluster main-sequence fitting, supernova 1987A, and eclipsing binaries. The eclipsing binaries yield a consistent distance on average; however, the internal scatter is twice as large as the average measurement error. I discuss parameters of LMC structure that pertain to distance indicators, and speculate that warps discovered using the color of the clump are not really warps. |
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