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  An ultra-short-period transiting super-Earth orbiting the M3 dwarf TOI-1685

Bluhm, P., Pallé, E., Molaverdikhani, K., Kemmer, J., Hatzes, A., Kossakowski, D., et al. (2021). An ultra-short-period transiting super-Earth orbiting the M3 dwarf TOI-1685. Astronomy and Astrophysics, 650: A78. doi:10.1051/0004-6361/202140688.

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 Creators:
Bluhm, P., Author
Pallé, E., Author
Molaverdikhani, K., Author
Kemmer, J., Author
Hatzes, A.P., Author
Kossakowski, D., Author
Stock, S., Author
Caballero, J.A., Author
Lillo-Box, J., Author
Béjar, V.J.S., Author
Soto, M.G., Author
Amado, P.J., Author
Brown, P., Author
Cadieux, C., Author
Cloutier, R., Author
Collins, K.A., Author
Collins, K.I., Author
Cortés-Contreras, M., Author
Doyon, R., Author
Dreizler, S., Author
Espinoza, N., AuthorFukui, A., AuthorGonzález-Álvarez, E., AuthorHenning, T., AuthorHorne, K., AuthorJeffers, Sandra V.1, Author           Jenkins, J.M., AuthorJensen, E.L.N., AuthorKaminski, A., AuthorKielkopf, J.F., AuthorKusakabe, N., AuthorKürster, M., AuthorLafrenière, D., AuthorLuque, R., AuthorMurgas, F., AuthorMontes, D., AuthorMorales, J.C., AuthorNarita, N., AuthorPassegger, V.M., AuthorQuirrenbach, A., AuthorSchöfer, P., AuthorReffert, S., AuthorReiners, A., AuthorRibas, I., AuthorRicker, G.R., AuthorSeager, S., AuthorSchweitzer, A., AuthorSchwarz, R.P., AuthorTamura, M., AuthorTrifonov, T., AuthorVanderspek, R., AuthorWinn, J., AuthorZechmeister, M., AuthorZapatero Osorio, M.R., Author more..
Affiliations:
1Department Solar and Stellar Interiors, Max Planck Institute for Solar System Research, Max Planck Society, ou_1832287              

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Free keywords: techniques: photometric / techniques: radial velocities / stars: individual: TOI-1685 / stars: late-type
 Abstract: Dynamical histories of planetary systems, as well as the atmospheric evolution of highly irradiated planets, can be studied by characterizing the ultra-short-period planet population, which the TESS mission is particularly well suited to discover. Here, we report on the follow-up of a transit signal detected in the TESS sector 19 photometric time series of the M3.0 V star TOI-1685 (2MASS J04342248+4302148). We confirm the planetary nature of the transit signal, which has a period of Pb = 0.6691403−0.0000021+0.0000023 d, using precise radial velocity measurements taken with the CARMENES spectrograph. From the joint photometry and radial velocity analysis, we estimate the following parameters for TOI-1685 b: a mass of Mb = 3.78−0.63+0.63 M, a radius of Rb = 1.70−0.07+0.07 R, which together result in a bulk density of ρb = 4.21−0.82+0.95 g cm−3, and an equilibrium temperature of Teq = 1069−16+16 K. TOI-1685 b is the least dense ultra-short-period planet around an M dwarf known to date. TOI-1685 b is also one of the hottest transiting super-Earth planets with accurate dynamical mass measurements, which makes it a particularly attractive target for thermal emission spectroscopy. Additionally, we report with moderate evidence an additional non-transiting planet candidate in the system, TOI-1685 [c], which has an orbital period of Pc = 9.02−0.12+0.10 d.

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Language(s): eng - English
 Dates: 2021
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1051/0004-6361/202140688
 Degree: -

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Title: Astronomy and Astrophysics
  Other : Astron. Astrophys.
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: Les Ulis Cedex A France : EDP Sciences
Pages: - Volume / Issue: 650 Sequence Number: A78 Start / End Page: - Identifier: ISSN: 1432-0746
ISSN: 0004-6361
CoNE: https://pure.mpg.de/cone/journals/resource/954922828219_1