HD 152246 - a new high-mass triple system and its basic properties

HD 152246 - a new high-mass triple system and its basic properties
复制标题

HD 152246 - 一种新的高质量三重系统及其基本性质

DOI:
10.1051/0004-6361/201424382
复制
发表时间:
2014
期刊:
arXiv: Solar and Stellar Astrophysics
影响因子:
--
通讯作者:
Le Bouquin
Le Bouquin
中科院分区:
--
文献类型:
--
作者:
Nasseri;Harmanec;Nemravová;Dembsky;Lehmann;Le Bouquin

文献摘要

参考文献

被引文献

相似文献

多历元高分辨率分析O型星星HD 152246的(R~ 50000)光谱(O 9 IV根据最新的分类),补充了数量有限的早期公布的径向速度,导致发现该对象是一个层次的三重系统,其中一个靠近的内对(Ba-Bb)具有轻微的偏心轨道(e= 0.11)和6\hbox{}0049的周期,在470天的高偏心轨道(e= 0.865)中旋转,另一个大质量和更明亮的分量A。内部系统的质量比一定很低,因为我们无法找到次级光谱的任何痕迹。质量比A/(Ba+Bb)为0.89。外层系统最近已三次使用长基线干涉测量法得到解决。干涉测量确认光谱结果并指定系统的元素。我们的轨道解,包括径向速度和干涉解的组合,表明外轨道的轨道倾角为112°,恒星质量为20.4和22.8 M。我们还解开了组分A和Ba的光谱,并将它们与来自两个独立程序TLUSTY和FASTWIND的合成光谱进行比较。在这两种情况下,拟合都不令人满意,我们推迟了更好地确定系统特性的未来研究,在获得观测结果后,在近星通过外轨道(最近的机会是2015年3月)。目前,我们只能得出结论:A组元是一颗O 9 IV型星星,vsini = 210 ± 10 km s-1,有效温度为33000 ± 500 K;而Ba组元是一颗O 9 V型天体,vsini = 65 ± 3 km s-1,Teff = 33600 ± 600 K。
Analyses of multi-epoch, high-resolution (R~ 50 000) optical spectra of the O-type star HD 152246 (O9 IV according to the most recent classification), complemented by a limited number of earlier published radial velocities, led to the finding that the object is a hierarchical triple system, where a close inner pair (Ba–Bb) with a slightly eccentric orbit (e= 0.11) and a period of 6\hbox{}0049 revolves in a 470-day highly eccentric orbit (e= 0.865) with another massive and brighter component A. The mass ratio of the inner system must be low since we were unable to find any traces of the secondary spectrum. The mass ratio A/(Ba+Bb) is 0.89. The outer system has recently been resolved using long-baseline interferometry on three occasions. The interferometry confirms the spectroscopic results and specifies elements of the system. Our orbital solutions, including the combined radial-velocity and interferometric solution indicate an orbital inclination of the outer orbit of 112° and stellar masses of 20.4 and 22.8M⊙. We also disentangled the spectra of components A and Ba and compare them to synthetic spectra from two independent programmes, TLUSTY and FASTWIND. In either case, the fit was not satisfactory and we postpone a better determination of the system properties for a future study, after obtaining observations during the periastron passage of the outer orbit (the nearest chance being March 2015). For the moment, we can only conclude that component A is an O9 IV star withvsini= 210 ± 10 km s-1and effective temperature of 33 000 ± 500 K, while component Ba is an O9 V object withvsini= 65 ± 3 km s-1andTeff= 33 600 ± 600 K.
DOI: 10.1051/0004-6361/201016114
发表时间: 2011-06-01
影响因子: 6.5
作者:
Brott, I.;Evans, C. J.;Anders, P.
通讯作者: Anders, P.
PIONIER:VLTI 的 4 望远镜访客仪器
DOI: --
发表时间: 2011
期刊:
影响因子: --
作者:
J. L. Bouquin;J. Berger;B. Lazareff;G. Zins;P. Haguenauer;L. Jocou;P. Kern;R. Millan;W. Traub;O. Absil;J. Augereau;M. Benisty;N. Blind;X. Bonfils;P. Bourget;A. Delboulbé;P. Feautrier;M. Germain;P. Gitton;D. Gillier;M. Kiekebusch;J. Kluska;J. Knudstrup;P. Labeye;J. Lizon;J. Monin;Y. Magnard;F. Malbet;D. Maurel;F. Ménard;M. Micallef;L. Michaud;G. Montagnier;S. Morel;T. Moulin;K. Perraut;D. Popovic;P. Rabou;S. Rochat;C. Rojas;F. Roussel;A. Roux;E. Stadler;S. Štefl;E. Tatulli;N. Ventura
通讯作者: N. Ventura
DOI: 10.1126/science.1223344
发表时间: 2012-07
期刊: Science
影响因子: 56.9
作者:
H. Sana;S. D. Mink;A. D. Koter;N. Langer;C. Evans;M. Gieles;E. Gosset;R. Izzard;J. L. Bouquin-J.
通讯作者: H. Sana;S. D. Mink;A. D. Koter;N. Langer;C. Evans;M. Gieles;E. Gosset;R. Izzard;J. L. Bouquin-J.
HD 152246,一种新的高质量三重系统——初步结果
DOI: --
发表时间: 2013
期刊:
影响因子: --
作者:
A. Nasseri;R. Chini;P. Harmanec;P. Mayer;T. Dembsky;H. Lehmann;H. Sana
通讯作者: H. Sana
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