NDLI: A Near-infrared Variant of the Barnes-evans Method for Finding Cepheid Distances Calibrated with High-precision Angular Diameters

Content Provider	Semantic Scholar
Author	Welch, Lonnie
Copyright Year	2007
Abstract	The advantages of a near-infrared variant of the Barnes-Evans method for estimating distances to Cepheid variables are described and quantiied. A surface brightness-color relation for K photometry and the (V ?K) 0 color index is established using modern , high-precision angular diameters from optical interferometers. Applied to data for the galactic (cluster) Cepheid U Sgr, this method yields a distance of 0.660 0.024 kpc and a true distance modulus of 9.10 0.07 mag. This estimate compares with the true distance modulus of 9.37 0.22 mag estimated by Gieren, Barnes, and Mooett (1993) using the classical Barnes-Evans technique. The possibility of estimating distances of LMC and SMC Cepheids directly { without intermediate steps { is discussed. The feasibility of determining the distance of M31 or M33 using this technique is examined and is probably within the reach of 8m-class telescopes.
File Format	PDF HTM / HTML
Alternate Webpage(s)	http://physun.physics.mcmaster.ca/Welch_Preprints/IR_BE.ps
Language	English
Access Restriction	Open
Subject Keyword	AngularJS CCL16 gene David C. Evans Diameter (qualifier value) Distance Estimated Little man computer MAG (cryptography) MAG Technology Co. Modulus of continuity Modulus robot Photometry Telescopes brightness
Content Type	Text
Resource Type	Article

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