The photosphere and circumstellar environment of the Be star Achernar

被引：0
|
作者：
Faes, Daniel M. [1 ,2 ]
de Souza, Armando Domiciano [2 ]
Carciofi, Alex C. [1 ]
Bendjoya, Philippe [2 ]
机构：
[1] Univ Sao Paulo, Inst Astron Geofis & Ciencias Atmosfer, Rua Matao 1226,Cidade Univ, BR-05508900 Sao Paulo, SP, Brazil
[2] Univ Nice Sophia Antipolis UNS, CNRS, UMR 7293 Observ Cote Azur OCA, Lab JL Lagrange, F-06108 Nice, France
来源：
NEW WINDOWS ON MASSIVE STARS: ASTEROSEISMOLOGY, INTERFEROMETRY AND SPECTROPOLARIMETRY | 2014年 / 307卷
关键词：
stars: individual (Achernar); stars: fundamental parameters; techniques: interferometric; circumstellar matter; stars: emission-line; Be; CARLO RADIATIVE-TRANSFER; STELLAR; WIND;
D O I：
10.1017/S1743921314006905
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Achernar is a key target to investigate high stellar rotation and the Be phenonemon. It is also the hottest star for which detailed photospheric information is available. Here we report our results to determine the photospheric parameters of Achernar and evaluate how the emission of a Viscous Decretion Disk (VDD) around it would be observable. The analysis is based on interferometric data (PIONIER and AMBER at ESO-VLTI), complemented by spectroscopy and polarimetry for the circumstellar emission. For the first time fundamental parameters of a Be photosphere were determined. The presence of a residual disk at the quiescent phase and some characteristics of the new formed disk (2013 activity) are also discussed. This is rare opportunity to precisely determine the stellar brightness distribution and evaluate the evolution of a just formed Be disk.
引用
收藏
页码：261 / 266
页数：6
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