EBLM 项目——VIII. 利用 CHEOPS 光变曲线测量 M 型矮星质量、半径和有效温度的初步结果
太阳与恒星天体物理
2021-07-09 v1 地球与行星天体物理
摘要
M 型矮星理论质量、半径和有效温度值的准确性是一个活跃的讨论话题。观测值与理论值之间的差异引发了这样一种可能性：当前理论恒星结构与演化模型在主序的低质量端是不准确的。为探讨此问题，我们利用 CHEOPS 卫星获取具有低质量恒星伴星食双星的高精度光变曲线。我们将这些光变曲线与太阳型伴星的光谱轨道结合，以测量 M 型矮星的质量、半径和有效温度。本文给出三个食双星的分析。我们使用 pycheops 数据分析软件拟合每个系统的观测凌星与掩食事件。其中两个系统也被 TESS 卫星观测过——我们类似地分析这些光变曲线以作比较。我们发现 CHEOPS 与 TESS 结果一致，给出了三个恒星半径和两个低质量恒星天体的有效温度值。我们借助 CHEOPS 正在进行的观测计划的这些初步结果表明，未来几年内可望获得约 24 个极低温矮星的新质量、半径和有效温度测量值。
引用
@article{arxiv.2106.07276,
title = {The EBLM project -- VIII. First results for M-dwarf mass, radius and effective temperature measurements using CHEOPS light curves},
author = {M. I. Swayne and P. F. L. Maxted and A. H. M. J. Triaud and S. G. Sousa and C. Broeg and H. -G. Florén and P. Guterman and A. E. Simon and I. Boisse and A. Bonfanti and D. Martin and A. Santerne and S. Salmon and M. R. Standing and V. Van Grootel and T. G. Wilson and Y. Alibert and R. Alonso and G. Anglada Escudé and J. Asquier and T. Bárczy and D. Barrado and S. C. C. Barros and M. Battley and W. Baumjohann and M. Beck and T. Beck and A. Bekkelien and W. Benz and N. Billot and X. Bonfils and A. Brandeker and M. -D. Busch and J. Cabrera and S. Charnoz and A. Collier Cameron and Sz. Csizmadia and M. B. Davies and M. Deleuil and A. Deline and L. Delrez and O. D. S. Demangeon and B. -O. Demory and G. Dransfield and D. Ehrenreich and A. Erikson and A. Fortier and L. Fossati and M. Fridlund and D. Futyan and D. Gandolfi and M. Gillon and M. Guedel and G. Hébrard and N. Heidari and C. Hellier and K. Heng and M. Hobson and S. Hoyer and K. G. Isaak and L. Kiss and V. Kunovac Hodžić and S. Lalitha and J. Laskar and A. Lecavelier des Etangs and M. Lendl and C. Lovis and D. Magrin and L. Marafatto and J. McCormac and N. Miller and V. Nascimbeni and G. Olofsson and R. Ottensamer and I. Pagano and E. Pallé and G. Peter and G. Piotto and D. Pollacco and D. Queloz and R. Ragazzoni and N. Rando and H. Rauer and I. Ribas and N. C. Santos and G. Scandariato and D. Ségransan and A. M. S. Smith and M. Steinberger and M. Steller and Gy. M. Szabó and N. Thomas and S. Udry and I. Walter and N. A. Walton and E. Willett},
journal= {arXiv preprint arXiv:2106.07276},
year = {2021}
}
备注
12 pages, 8 figures, accepted for publication in MNRAS