CHARA/MIRC interferometry of red supergiants: diameters, effective temperatures and surface features

Simple item page
dc.creatorKiss, L. L.
dc.creatorMonnier, J. D.
dc.creatorBedding, T. R.
dc.creatorTuthill, P.
dc.creatorZhao, M.
dc.creatorIreland, M. J.
dc.creatorBrummelaar, T. A. ten
dc.date2009-02-16
dc.date2009-02-17
dc.date.accessioned2026-07-07T12:42:12Z
dc.date.available2026-07-07T12:42:12Z
dc.descriptionWe 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 evoked 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.
dc.description6 pages, 5 figures, to appear in the Proc. of "Hot and Cool: Bridging Gaps in Massive Star Evolution", NASA Herschel Science Center, Nov 10-12, 2008
dc.identifierhttps://arxiv.org/abs/0902.2602
dc.identifierhttp://arxiv.org/abs/0902.2602
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/219993
dc.subjectSolar and Stellar Astrophysics
dc.titleCHARA/MIRC interferometry of red supergiants: diameters, effective temperatures and surface features
dc.typetext

Files

Collections

arXiv