Investigation of a transiting planet candidate in Trumpler 37: an astrophysical false positive eclipsing spectroscopic binary star
Abstract
We report our investigation of the first transiting planet candidate from the YETI project in the young (~4 Myr old) open cluster Trumpler 37. The transit-like signal detected in the lightcurve of the F8V star 2M21385603+5711345 repeats every 1.364894+/-0.000015 days, and has a depth of 54.5+/-0.8 mmag in R. Membership to the cluster is supported by its mean radial velocity and location in the color-magnitude diagram, while the Li diagnostic and proper motion are inconclusive in this regard. Follow-up photometric monitoring and adaptive optics imaging allow us to rule out many possible blend scenarios, but our radial-velocity measurements show it to be an eclipsing single-lined spectroscopic binary with a late-type (mid-M) stellar companion, rather than one of planetary nature. The estimated mass of the companion is 0.15-0.44 solar masses. The search for planets around very young stars such as those targeted by the YETI survey remains of critical importance to understand the early stages of planet formation and evolution.
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Cite
@article{arxiv.1403.6020,
title = {Investigation of a transiting planet candidate in Trumpler 37: an astrophysical false positive eclipsing spectroscopic binary star},
author = {R. Errmann and G. Torres and T. O. B. Schmidt and M. Seeliger and A. W. Howard and G. Maciejewski and R. Neuhäuser and S. Meibom and A. Kellerer and D. P. Dimitrov and B. Dincel and C. Marka and M. Mugrauer and Ch. Ginski and Ch. Adam and St. Raetz and J. G. Schmidt and M. M. Hohle and A. Berndt and M. Kitze and L. Trepl and M. Moualla and T. Eisenbeiß and S. Fiedler and A. Dathe and Ch. Graefe and N. Pawellek and K. Schreyer and D. P. Kjurkchieva and V. S. Radeva and V. Yotov and W. P. Chen and S. C. -L. Hu and Z. -Y. Wu and X. Zhou and T. Pribulla and J. Budaj and M. Vaňko and E. Kundra and Ľ. Hambálek and V. Krushevska and Ł. Bukowiecki and G. Nowak and L. Marschall and H. Terada and D. Tomono and M. Fernandez and A. Sota and H. Takahashi and Y. Oasa and C. Briceño and R. Chini and C. H. Broeg},
journal= {arXiv preprint arXiv:1403.6020},
year = {2015}
}
Comments
12 pages, 8 figures