2000/05/31 by I. I. Ivans, C. Sneden, Ivans, I. I. +11
Physics and Astronomy · #Astrophysics (astro-ph) #FOS: Physical sciences #astro-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/0005595
4 pages, 1 figure, to appear in Revista Mexicana de Astronomia y Astrofisica Serie de Conferencias: ``The Seventh Texas-Mexico Conference on Astrophysics: Glows, Flows & Blows'' April 6-8, 2000, Austin, Texas
arxiv created 2000/05/31 · arxiv updated 2009/12/01
By employing two different spectroscopic techniques we have mapped out the variable ISM dust extinction endemic to globular cluster M4. We derive an average E(B-V) reddening of 0.33 +/- 0.01 and R = 3.4 +/- 0.4, both in good agreement with previous studies of M4. For individual stars in the most heavily reddened regions of M4, we find E(B-V) values significantly higher than those inferred by studies of interstellar gas; for heavily reddened regions, the gas measured in column density measurements may not completely trace the dust.