THE SOLAR NEIGHBORHOOD. XXX. FOMALHAUT C
THE SOLAR NEIGHBORHOOD. XXX. FOMALHAUT C
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太阳能社区。
DOI：
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
J. Bean
中科院分区：
文献类型：
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作者：
E. Mamajek;Jennifer Lynn Bartlett;A. Seifahrt;T. Henry;S. Dieterich;John C. Lurie;M. Kenworthy;W. Jao;A. Riedel;J. Subasavage;J. Winters;C. Finch;P. Ianna;J. Bean
LP 876-10是一颗活跃的M4矮星，位于宝瓶座附近，距离7.6 pc。这颗星星是10 pc普查的新成员，视差是通过近星研究联盟（RECONS）在中小孔径研究望远镜系统的0.9米望远镜上进行的天体测量的。我们证明了LP 876-10的天体测量、视向速度和光度数据与北落师门多重系统的第三个恒星组成部分星星是一致的，尽管星星在天空中距离北落师门A近6°。LP 876-10与北落师门的三维距离仅为0.77 ± 0.01 pc，与TW PsA（北落师门B）的三维距离为0.987 ± 0.006 pc，完全在北落师门系统的估计潮汐半径（1.9 pc）之内。LP 876-10共享北落师门的运动，其速度为0.01 km/s，我们估计其闯入概率为0.010 - 5。我们的中阶梯光谱学和天体测量学都无法证实华盛顿星星表（WSI 138）中报告的LP 876-10的近伴星。我们认为，北落师门系统据称属于蓖麻移动群，很可能是一个动态的流，因此，该集团的成员资格不提供有用的年龄限制组成员。LP 876-10（北落师门C）现在已经从默默无闻中崛起，成为一个罕见的M型场矮星的例子，其年龄和金属丰度都得到了很好的限制（440 ± 40百万年）。除了拥有一个碎片盘系统和候选行星外，北落师门现在还有两个已知最广泛的恒星伴星。
LP 876-10 is a nearby active M4 dwarf in Aquarius at a distance of 7.6 pc. The star is a new addition to the 10 pc census, with a parallax measured via the REsearch Consortium On Nearby Stars (RECONS) astrometric survey on the Small and Moderate Aperture Research Telescope System's 0.9 m telescope. We demonstrate that the astrometry, radial velocity, and photometric data for LP 876-10 are consistent with the star being a third bound stellar component to the Fomalhaut multiple system, despite the star lying nearly 6° away from Fomalhaut A in the sky. The three-dimensional separation of LP 876-10 from Fomalhaut is only 0.77 ± 0.01 pc, and 0.987 ± 0.006 pc from TW PsA (Fomalhaut B), well within the estimated tidal radius of the Fomalhaut system (1.9 pc). LP 876-10 shares the motion of Fomalhaut within ∼1 km s−1, and we estimate an interloper probability of ∼10−5. Neither our echelle spectroscopy nor astrometry are able to confirm the close companion to LP 876-10 reported in the Washington Double Star Catalog (WSI 138). We argue that the Castor Moving Group to which the Fomalhaut system purportedly belongs, is likely to be a dynamical stream, and hence membership to the group does not provide useful age constraints for group members. LP 876-10 (Fomalhaut C) has now risen from obscurity to become a rare example of a field M dwarf with well-constrained age (440 ± 40 Myr) and metallicity. Besides harboring a debris disk system and candidate planet, Fomalhaut now has two of the widest known stellar companions.
CRIRES 搜索质量最低恒星周围的行星 I 使用氨气室进行高精度近红外视向速度
DOI：
10.1088/0004-637x/713/1/410
发表时间：
2010
期刊：
The Astrophysical Journal
影响因子：
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作者：
Seifahrt;H. Hartman;H. Nilsson;G. Wiedemann;A. ReinersS. Dreizler;T. Henry
通讯作者：
T. Henry