@inproceedings{e65a902333994957b9db2b8c6be5f91f,
title = "CHARA/MIRC Interferometry of red supergiants: diameters, effective temperatures, and surface features",
abstract = "We have obtained H-band interferometric observations of three galactic red supergiant stars using the MIRC instrument on the CHARA array. The targets include AZ Cyg, a field RSG, and two members of the Per OB1 association, RS Per and T Per. We find evidence of departures from circular symmetry in all cases, which can be modelled with the presence of hotspots. This is the first detection of these features in the H-band. The measured mean diameters and the spectral energy distributions were combined to determine effective temperatures. The results give further support to the recently derived hotter temperature scale of red supergiant stars by Levesque et al. (2005), which has been invoked to reconcile the empirically determined physical parameters and stellar evolutionary theories. We see a possible correlation between spottedness and mid-IR emission of the circumstellar dust, suggesting a connection between mass loss and the mechanism that generates the spots.",
keywords = "LONG SECONDARY PERIODS, CONVECTION, STARS, BETELGEUSE, MODELS, SCALE",
author = "L. Kiss and Monnier, {J. D.} and Bedding, {Timothy R.} and Tuthill, {Peter G} and Ming Zhao and Ireland, {M. J.} and {Ten Brummelaar}, {T. A.}",
year = "2010",
language = "English",
isbn = "9781583817308",
series = "Astronomical Society of the Pacific Conference Series",
publisher = "ASTRONOMICAL SOC PACIFIC",
pages = "140--145",
editor = "Claus Leitherer and Bennett, {Philip D} and Morris, {Pat W} and VanLoon, {Jacco T}",
booktitle = "Hot and cool",
note = "Workshop on Hot and Cool: Bridging Gaps in Massive-Star Evolution ; Conference date: 10-11-2008 Through 12-11-2008",
}