Resolving the dusty torus and the mystery surrounding LMC red supergiant WOH G64

被引：0

作者：

Ohnaka, Keiichi ^{[1
]}

Driebe, Thomas ^{[1
]}

Hofmann, Karl-Heinz ^{[1
]}

Weigelt, Gerd ^{[1
]}

Wittkowski, Markus ^{[2
]}

机构：

[1] Max Planck Inst Radioastron, Hugel 69, D-53121 Bonn, Germany

[2] European Southern Observ, D-85748 Garching, Germany

来源：

MAGELLANIC SYSTEM: STARS, GAS, AND GALAXIES | 2009年 / 256期

关键词：

techniques: interferometric; infrared: stars; circumstellar matter; stars: evolution; stars: late-type; stars: mass loss; supergiants; Magellanic Clouds; LARGE-MAGELLANIC-CLOUD; SKY AUTOMATED SURVEY; VARIABLE-STARS; SOUTHERN-HEMISPHERE; CATALOG; QUARTER; EVOLUTION;

D O I：

10.1017/S1743921308028858

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present mid-IR long-baseline interferometric observations of the red supergiant WOH G64 in the Large Magellanic Cloud with MIDI at the ESO's Very Large Telescope Interferometer (VLTI). Our MIDI observations of WOH G64 are the first VLTI observations to spatially resolve an individual stellar source in an extragalactic system. Our 2-D radiative transfer modeling reveals the presence of a geometrically and optically thick torus seen nearly pole-on. This model brings WOH G64 in much better agreement with the current evolutionary tracks for a 25 M-circle dot star - about a half of the previous estimate of 40 M-circle dot - and solves the serious discrepancy between theory and observation which existed for this object.

引用

页码：454 / +

页数：3