GRAVITY Spectro-interferometric Study of the Massive Multiple Stellar System HD 93206 A
GRAVITY Spectro-interferometric Study of the Massive Multiple Stellar System HD 93206 A
复制标题
大质量多恒星系统 HD 93206 A 的重力光谱干涉研究
DOI:
10.3847/1538-4357/aa803d
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发表时间:
2017
期刊:
影响因子:
--
通讯作者:
R. Boekel
中科院分区:
文献类型:
--
作者:
J. Sanchez;A. Alberdi;R. Barbá;J. Bestenlehner;J. Bestenlehner;F. Cantalloube;W. Brandner;T. Henning;C. Hummel;J. M. Apellániz;J. Pott;R. Schödel;R. Boekel
Characterization of the dynamics of massive star systems and the astrophysical properties of the interacting components are a prerequisite for understanding their formation and evolution. Optical interferometry at milliarcsecond resolution is a key observing technique for resolving high-mass multiple compact systems. Here, we report on Very Large Telescope Interferometer/GRAVITY, Magellan/Folded-port InfraRed Echellette, and MPG2.2 m/FEROS observations of the late-O/early-B type system HD 93206 A, which is a member of the massive cluster Collinder 228 in the Carina nebula complex. With a total mass of about , it is one of the most compact massive quadruple systems known. In addition to measuring the separation and position angle of the outer binary Aa–Ac, we observe Brγ and He i variability in phase with the orbital motion of the two inner binaries. From the differential phase ( ) analysis, we conclude that the Brγ emission arises from the interaction regions within the components of the individual binaries, which is consistent with previous models for the X-ray emission of the system based on wind–wind interaction. With an average 3σ deviation of , we establish an upper limit of p ∼ 0.157 mas (0.35 au) for the size of the Brγ line-emitting region. Future interferometric observations with GRAVITY using the 8 m Unit Telescopes will allow us to constrain the line-emitting regions down to angular sizes of 20 μas (0.05 au at the distance of the Carina nebula).
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影响因子:
6.5
作者:
G. C. R. Abuter;M. Accardo;A. Amorim;N. Anugu;G. Ávila;N. Azouaoui;M. Benisty;J. Berger;N. Bl
通讯作者:
G. C. R. Abuter;M. Accardo;A. Amorim;N. Anugu;G. Ávila;N. Azouaoui;M. Benisty;J. Berger;N. Bl
DOI:
10.1111/j.1365-2966.2012.21317.x
发表时间:
2012-05
影响因子:
4.8
作者:
R. Chini;V. Hoffmeister;A. Nasseri;O. Stahl;H. Zinnecker
通讯作者:
R. Chini;V. Hoffmeister;A. Nasseri;O. Stahl;H. Zinnecker
影响因子:
6.5
作者:
Chesneau O
通讯作者:
Chesneau O
DOI:
10.1117/12.789115
发表时间:
2008
期刊:
--
影响因子:
--
作者:
Baron F
通讯作者:
Baron F