Pith. sign in

REVIEW

The EBLM project -- IX. Five fully convective M-dwarfs, precisely measured with CHEOPS and TESS light curves

Not yet reviewed by Pith; the record is open.

Re-run · record.json Download PDF Read on arXiv ↗

This paper has not been read by Pith yet. Machine review is queued; the pith claim, tier, and objections will appear here once it completes.

SPECIMEN: schema-true, not a live event

T0 review · schema-true

One-sentence machine reading of the paper's core claim.

pith:XXXXXXXX · record.json · timestamp

arxiv 2209.03128 v1 pith:HT2ZOT5W submitted 2022-09-07 astro-ph.SR astro-ph.EP

The EBLM project -- IX. Five fully convective M-dwarfs, precisely measured with CHEOPS and TESS light curves

D. Sebastian , M. I. Swayne , P. F. L. Maxted , A. H. M. J. Triaud , S. G. Sousa , G. Olofsson , M. Beck , N. Billot
show 80 more authors
S. Hoyer S. Gill N. Heidari D. V. Martin C. M. Persson M. R. Standing Y. Alibert R. Alonso G. Anglada J. Asquier T. B\'arczy D. Barrado S. C. C. Barros M. P. Battley W. Baumjohann T. Beck W. Benz M. Bergomi I. Boisse X. Bonfils A. Brandeker C. Broeg J. Cabrera S. Charnoz A. Collier Cameron Sz. Csizmadia M. B. Davies M. Deleuil L. Delrez O. D. S. Demangeon B.-O. Demory G. Dransfield D. Ehrenreich A. Erikson A. Fortier L. Fossati M. Fridlund D. Gandolfi M. Gillon M. G\"udel J. Hasiba G. H\'ebrard K. Heng K. G. Isaak L. L. Kiss E. Kopp V. Kunovac J. Laskar A. Lecavelier des Etangs M. Lendl C. Lovis D. Magrin J. McCormac N. J. Miller V. Nascimbeni R. Ottensamer I. Pagano E. Pall\'e F. A. Pepe G. Peter G. Piotto D. Pollacco D. Queloz R. Ragazzoni N. Rando H. Rauer I. Ribas S. Lalitha A. Santerne N. C. Santos G. Scandariato D. S\'egransan A. E. Simon A. M. S. Smith M. Steller Gy. M. Szab\'o N. Thomas S. Udry V. Van Grootel N. A. Walton
This is my paper
classification astro-ph.SR astro-ph.EP
keywords m-dwarfsbinariescurvesfivelightmeasurementsparametersradius
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
0 comments
read the original abstract

Eclipsing binaries are important benchmark objects to test and calibrate stellar structure and evolution models. This is especially true for binaries with a fully convective M-dwarf component for which direct measurements of these stars' masses and radii are difficult using other techniques. Within the potential of M-dwarfs to be exoplanet host stars, the accuracy of theoretical predictions of their radius and effective temperature as a function of their mass is an active topic of discussion. Not only the parameters of transiting exoplanets but also the success of future atmospheric characterisation rely on accurate theoretical predictions. We present the analysis of five eclipsing binaries with low-mass stellar companions out of a sub-sample of 23, for which we obtained ultra high-precision light curves using the CHEOPS satellite. The observation of their primary and secondary eclipses are combined with spectroscopic measurements to precisely model the primary parameters and derive the M-dwarfs mass, radius, surface gravity, and effective temperature estimates using the PYCHEOPS data analysis software. Combining these results to the same set of parameters derived from TESS light curves, we find very good agreement (better than 1\% for radius and better than 0.2% for surface gravity). We also analyse the importance of precise orbits from radial velocity measurements and find them to be crucial to derive M-dwarf radii in a regime below 5% accuracy. These results add five valuable data points to the mass-radius diagram of fully-convective M-dwarfs.

discussion (0)

Sign in with ORCID, Apple, or X to comment. Anyone can read and Pith papers without signing in.