arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1812.09406astro-ph.EP
收藏

HATS-71 b:一颗巨大的行星在TESS第1区经过一颗M3矮星

HATS-71b: A giant planet transiting an M3 dwarf star in TESS Sector 1

G. Á. Bakos, D. Bayliss, J. Bento, W. Bhatti, R. Brahm, Z. Csubry, N. Espinoza, J. D. Hartman, Th. Henning, A. Jordán, L. Mancini, K. Penev, M. Rabus, P. Sarkis… 展开作者

G. Á. Bakos, D. Bayliss, J. Bento, W. Bhatti, R. Brahm, Z. Csubry, N. Espinoza, J. D. Hartman, Th. Henning, A. Jordán, L. Mancini, K. Penev, M. Rabus, P. Sarkis, V. Suc, M. de Val-Borro, G. Zhou, R. P. Butler, J. Crane, S. Durkan, S. Shectman, J. Kim, J. Lázár, I. Papp, P. Sári, G. Ricker, R. Vanderspek, D. W. Latham, S. Seager, J. N. Winn, J. Jenkins, A. D. Chacon, G. Fűrész, B. Goeke, J. Li, S. Quinn, E. V. Quintana, P. Tenenbaum, J. Teske, M. Vezie, L. Yu, C. Stockdale, P. Evans, H. M. Relles

摘要:

我们报告发现的HATS-71 b,一个过境的气体巨行星在一个P = 3.7955天的轨道周围的G = 15.35等M3矮星。HATS-71是已知拥有热木星的最冷的M矮星。凌日期间的光损失为4.7%,超过任何其他已确认的凌日行星系统。这颗行星被HATSouth的地面凌日调查确定为候选行星。这是使用地面测光,光谱学和成像,以及来自NASA TESS任务(TIC 234523599)的天基测光确认的。结合所有这些数据,并利用盖亚DR 2,我们发现这颗行星的半径为$1.080 \pm 0.016 R_J$,质量为$0.45 \pm 0.24 M_J$($0.81 M_J$的95%置信上限),而恒星的质量为$0.569 \pm^{0.042}_{0.069}\,M_\odot$,半径为$0.5161\pm^{0.0053}_{0.0099}\,R_\odot$。盖亚DR 2的数据显示,HATS-71位于赫兹-罗素图中的双星主序星附近,这表明可能有一个尚未解决的双星伴星。所有可用的数据都很好地拟合了一个模型,其中有一颗质量为$0.24 M_\odot$的二级恒星,尽管我们警告说,目前还没有直接的光谱或成像证据来证明这样的伴星。即使真的存在这样一颗伴星,行星的半径和质量也只会与我们在假设恒星是单一恒星的情况下计算出的值略有不同。

英文摘要:

We report the discovery of HATS-71b, a transiting gas giant planet on a P = 3.7955 day orbit around a G = 15.35 mag M3 dwarf star. HATS-71 is the coolest M dwarf star known to host a hot Jupiter. The loss of light during transits is 4.7%, more than any other confirmed transiting planet system. The planet was identified as a candidate by the ground-based HATSouth transit survey. It was confirmed using ground-based photometry, spectroscopy, and imaging, as well as space-based photometry from the NASA TESS mission (TIC 234523599). Combining all of these data, and utilizing Gaia DR2, we find that the planet has a radius of $1.080 \pm 0.016 R_J$ and mass of $0.45 \pm 0.24 M_J$ (95% confidence upper limit of $0.81 M_J$ ), while the star has a mass of $0.569 \pm^{0.042}_{0.069}\,M_\odot$ and a radius of $0.5161\pm^{0.0053}_{0.0099}\,R_\odot$. The Gaia DR2 data show that HATS-71 lies near the binary main sequence in the Hertzsprung-Russell diagram, suggesting that there may be an unresolved stellar binary companion. All of the available data is well fitted by a model in which there is a secondary star of mass $0.24 M_\odot$, although we caution that at present there is no direct spectroscopic or imaging evidence for such a companion. Even if there does exist such a stellar companion, the radius and mass of the planet would be only marginally different from the values we have calculated under the assumption that the star is single.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑