A search for photometric variability towards M71 with the Near-Infrared Transiting ExoplanetS Telescope
A search for photometric variability towards M71 with the Near-Infrared Transiting ExoplanetS Telescope
复制标题
使用近红外凌日系外行星望远镜寻找 M71 的光度变异性
DOI：
10.1093/mnras/stt2449
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发表时间：
2013
影响因子：
4.8
通讯作者：
U. Sheffield
中科院分区：
文献类型：
--
作者：
J. McCormac;I. Skillen;D. Pollacco;F. Faedi;G. Ramsay;V. Dhillon;I. Todd;A. G. I. N. G. O. Telescopes;Santa Cruz de la Palma;Spain.;U. Warwick;Coventry;UK.;Astrophysics Research Centre;Queen's University;Belfast;Armagh Observatory;Armagh;D. PhysicsAstronomy;U. Sheffield
我们展示了用近红外凌日系外行星望远镜对以球状星团M71为中心的11arcmin × 11arcmin场进行的高节奏光度测量的结果。我们调查的目的是寻找恒星变异性和巨大的凌日系外行星。这次调查不同于以往对M71的光度调查，因为它对较低幅度（ΔM≤0.02等）和较长周期（P bbb22 d）的变化比以往对该星团的研究更敏感。我们已经发现了17颗朝向M71的新变星，并确认了13颗已知天体的性质，其中7颗的轨道周期是经过改进或新确定的。考虑到我们对M71水平分支的高节奏测量的光度精度，我们确认在测量的区域内星团没有RR天琴座变星。我们在我们的样本中提出了新的B和v波段光度法，从中我们估计了可变物体的光谱类型。我们还搜索了凌日热木星的调查数据，并对预期的探测数量进行了模拟。在M71的主序上观测到大约1000颗恒星，光度精度足以探测到一颗凌日的热木星；然而，什么也没找到。
We present the results of a high-cadence photometric survey of an 11 arcmin × 11 arcmin field centred on the globular cluster M71, with the Near-Infrared Transiting ExoplanetS Telescope. The aim of our survey is to search for stellar variability and giant transiting exoplanets. This survey differs from previous photometric surveys of M71 in that it is more sensitive to lower amplitude (ΔM ≤ 0.02 mag) and longer period (P > 2 d) variability than previous work on this cluster. We have discovered 17 new variable stars towards M71 and confirm the nature of 13 previously known objects, for which the orbital periods of 7 are refined or newly determined. Given the photometric precision of our high-cadence survey on the horizontal branch of M71, we confirm that the cluster is devoid of RR Lyrae variable stars within the area surveyed. We present new B- and V-band photometry of the stars in our sample from which we estimate spectral types of the variable objects. We also search our survey data for transiting hot Jupiters and present simulations of the expected number of detections. Approximately 1000 stars were observed on the main sequence of M71 with sufficient photometric accuracy to detect a transiting hot Jupiter; however, none were found.
影响因子：
6.5
作者：
J. Skottfelt;D. Bramich;R. Jaimes;U. Jørgensen;N. Kains;K. Harpsoe;C. Liebig;M. Penny;Khalid Al-Subai;J. M. Andersen;V. Bozza;P. Browne;S. Novati;Y. Damerdji;C. Diehl;Martin Dominik;A. Elyiv;E. Giannini;F. Hessman;T. Hinse;M. Hundertmark;D. Juncher;E. Kerins;H. Korhonen;L. Mancini;R. Martin;M. Rabus;S. Rahvar;G. Scarpetta;J. Southworth;C. Snodgrass;R. Street;J. Surdej;J. Tregloan-Reed;C. Vilela;A. Williams
通讯作者：
J. Skottfelt;D. Bramich;R. Jaimes;U. Jørgensen;N. Kains;K. Harpsoe;C. Liebig;M. Penny;Khalid Al-Subai;J. M. Andersen;V. Bozza;P. Browne;S. Novati;Y. Damerdji;C. Diehl;Martin Dominik;A. Elyiv;E. Giannini;F. Hessman;T. Hinse;M. Hundertmark;D. Juncher;E. Kerins;H. Korhonen;L. Mancini;R. Martin;M. Rabus;S. Rahvar;G. Scarpetta;J. Southworth;C. Snodgrass;R. Street;J. Surdej;J. Tregloan-Reed;C. Vilela;A. Williams