2020MNRAS.492.5399N

Query : 2020MNRAS.492.5399N

2020MNRAS.492.5399N - Mon. Not. R. Astron. Soc., 492, 5399-5412 (2020/March-2)

Mass determinations of the three mini-Neptunes transiting TOI-125.

NIELSEN L.D., GANDOLFI D., ARMSTRONG D.J., JENKINS J.S., FRIDLUND M., SANTOS N.C., DAI F., ADIBEKYAN V., LUQUE R., STEFFEN J.H., ESPOSITO M., MERU F., SABOTTA S., BOLMONT E., KOSSAKOWSKI D., OTEGI J.F., MURGAS F., STALPORT M., RODLER F., DIAZ M.R., KURTOVIC N.T., RICKER G., VANDERSPEK R., LATHAM D.W., SEAGER S., WINN J.N., JENKINS J.M., ALLART R., ALMENARA J.M., BARRADO D., BARROS S.C.C., BAYLISS D., BERDINAS Z.M., BOISSE I., BOUCHY F., BOYD P., BROWN D.J.A., BRYANT E.M., BURKE C., COCHRAN W.D., COOKE B.F., DEMANGEON O.D.S., DIAZ R.F., DITTMAN J., DORN C., DUMUSQUE X., GARCIA R.A., GONZALEZ-CUESTA L., GRZIWA S., GEORGIEVA I., GUERRERO N., HATZES A.P., HELLED R., HENZE C.E., HOJJATPANAH S., KORTH J., LAM K.W.F., LILLO-BOX J., LOPEZ T.A., LIVINGSTON J., MATHUR S., MOUSIS O., NARITA N., OSBORN H.P., PALLE E., ROJAS P.A.P., PERSSON C.M., QUINN S.N., RAUER H., REDFIELD S., SANTERNE A., DOS SANTOS L.A., SEIDEL J.V., SOUSA S.G., TING E.B., TURBET M., UDRY S., VANDERBURG A., VAN EYLEN V., VINES J.I., WHEATLEY P.J. and WILSON P.A.

Abstract (from CDS):

The Transiting Exoplanet Survey Satellite, TESS, is currently carrying out an all-sky search for small planets transiting bright stars. In the first year of the TESS survey, a steady progress was made in achieving the mission's primary science goal of establishing bulk densities for 50 planets smaller than Neptune. During that year, the TESS's observations were focused on the southern ecliptic hemisphere, resulting in the discovery of three mini-Neptunes orbiting the star TOI-125, a V = 11.0 K0 dwarf. We present intensive HARPS radial velocity observations, yielding precise mass measurements for TOI-125b, TOI-125c, and TOI-125d. TOI-125b has an orbital period of 4.65 d, a radius of 2.726 ± 0.075 RE, a mass of 9.50 ± 0.88 ME, and is near the 2:1 mean motion resonance with TOI-125c at 9.15 d. TOI-125c has a similar radius of 2.759 ± 0.10 RE and a mass of 6.63 ± 0.99 ME, being the puffiest of the three planets. TOI-125d has an orbital period of 19.98 d and a radius of 2.93 ± 0.17 RE and mass 13.6 ± 1.2 ME. For TOI-125b and d, we find unusual high eccentricities of 0.19 ± 0.04 and 0.17^{+0.08}_{-0.06}, respectively. Our analysis also provides upper mass limits for the two low-SNR planet candidates in the system; for TOI-125.04 (RP = 1.36 RE, P = 0.53 d), we find a 2σ upper mass limit of 1.6 ME, whereas TOI-125.05 (RP=4.2{+2.4}_{-1.4} RE, P = 13.28 d) is unlikely a viable planet candidate with an upper mass limit of 2.7 ME. We discuss the internal structure of the three confirmed planets, as well as dynamical stability and system architecture for this intriguing exoplanet system.

Abstract Copyright: © 2020 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): Planets and satellites: detection - Planets and satellites: individual: (TOI-125 - TIC 52368076)

Simbad objects: 21

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Number of rows : 21
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 TOI-125.04 Pl? 01 34 22.7341114800 -66 40 32.951081784           ~ 3 0
2 TOI-125b Pl 01 34 22.7341114800 -66 40 32.951081784           ~ 17 0
3 TOI-125c Pl 01 34 22.7341114800 -66 40 32.951081784           ~ 21 0
4 TOI-125.05 Pl? 01 34 22.7341114800 -66 40 32.951081784           ~ 3 0
5 TOI-125d Pl 01 34 22.7341114800 -66 40 32.951081784           ~ 19 0
6 TOI-125 PM* 01 34 22.7341114800 -66 40 32.951081784   11.72 11.02     ~ 38 0
7 HD 15337 PM* 02 27 28.3781273256 -27 38 06.736755624   9.95 9.09     K1V 122 0
8 HD 15337c Pl 02 27 28.3781273256 -27 38 06.736755624           ~ 30 0
9 HD 15337b Pl 02 27 28.3781273256 -27 38 06.736755624           ~ 38 0
10 NAME BD-17 588Ab Pl 03 01 51.3936681048 -16 35 36.031178525           ~ 85 0
11 HD 21749 PM* 03 26 59.2226447548 -63 29 56.762928961 10.446 9.302 8.143 7.43 6.865 K4.5V 133 1
12 HD 21749b Pl 03 26 59.2226447548 -63 29 56.762928961           ~ 49 0
13 HD 23472 PM* 03 41 50.3987760888 -62 46 01.477226928   10.80 9.72     K3.5V 77 0
14 HD 23472b Pl 03 41 50.3987760888 -62 46 01.477226928           ~ 19 0
15 HD 23472c Pl 03 41 50.3987760888 -62 46 01.477226928           ~ 18 0
16 * pi. Men PM* 05 37 09.8868446714 -80 28 08.834553264   6.25 5.67     G0V 390 1
17 * pi. Men c Pl 05 37 09.8868446714 -80 28 08.834553264           ~ 117 0
18 L 678-39 PM* 09 36 01.6372169407 -21 39 38.877606712 13.647 12.48 10.906 9.858 8.577 M2.5V 213 0
19 NAME L 678-39b Pl 09 36 01.6372169407 -21 39 38.877606712           ~ 86 0
20 NAME G 139-21b Pl 17 15 18.9339850845 +04 57 50.066612336           ~ 845 1
21 Kepler-36 Er* 19 25 00.0428079600 +49 13 54.630900876   12.795 12.174 12.094   F2 251 1

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