2022AJ....163..293T

Query : 2022AJ....163..293T

2022AJ....163..293T - Astron. J., 163, 293-293 (2022)

The TESS-Keck Survey. XI. Mass Measurements for Four Transiting Sub-Neptunes Orbiting K Dwarf TOI-1246.

TURTELBOOM E.V., WEISS L.M., DRESSING C.D., NOWAK G., PALLE E., BEARD C., BLUNT S., BRINKMAN C., CHONTOS A., CLAYTOR Z.R., DAI F., DALBA P.A., GIACALONE S., GONZALES E., HARADA C.K., HILL M.L., HOLCOMB R., KORTH J., LUBIN J., MASSERON T., MacDOUGALL M., MAYO A.W., MOCNIK T., MURPHY J.M.A., POLANSKI A.S., RICE M., RUBENZAHL R.A., SCARSDALE N., STASSUN K.G., TYLER D.B., VAN ZANDT J., CROSSFIELD I.J.M., DEEG H.J., FULTON B., GANDOLFI D., HOWARD A.W., HUBER D., ISAACSON H., KANE S.R., LAM K.W.F., LUQUE R., MARTIN E.L., MORELLO G., ORELL-MIQUEL J., PETIGURA E.A., ROBERTSON P., ROY A., VAN EYLEN V., BAKER D., BELINSKI A.A., BIERYLA A., CIARDI D.R., COLLINS K.A., CUTTING N., DELLA-ROSE D.J., ELLINGSEN T.B., FURLAN E., GAN T., GNILKA C.L., GUERRA P., HOWELL S.B., JIMENEZ M., LATHAM D.W., LARIVIERE M., LESTER K.V., LILLO-BOX J., LUKER L., MANN C.R., PLAVCHAN P.P., SAFONOV B., SKINNER B., STRAKHOV I.A., WITTROCK J.M., CALDWELL D.A., ESSACK Z., JENKINS J.M., QUINTANA E.V., RICKER G.R., VANDERSPEK R., SEAGER S. and WINN J.N.

Abstract (from CDS):

Multiplanet systems are valuable arenas for investigating exoplanet architectures and comparing planetary siblings. TOI-1246 is one such system, with a moderately bright K dwarf (V = 11.6, K = 9.9) and four transiting sub-Neptunes identified by TESS with orbital periods of 4.31, 5.90, 18.66, and 37.92 days. We collected 130 radial velocity observations with Keck/HIRES and TNG/HARPS-N to measure planet masses. We refit the 14 sectors of TESS photometry to refine planet radii (2.97 ± 0.06 R⊕, 2.47 ± 0.08 R⊕, 3.46 ± 0.09 R⊕, and 3.72 ± 0.16 R⊕) and confirm the four planets. We find that TOI-1246 e is substantially more massive than the three inner planets (8.1 ± 1.1 M⊕, 8.8 ± 1.2 M⊕, 5.3 ± 1.7 M⊕, and 14.8 ± 2.3 M⊕). The two outer planets, TOI-1246 d and TOI-1246 e, lie near to the 2:1 resonance (Pe/Pd = 2.03) and exhibit transit-timing variations. TOI-1246 is one of the brightest four-planet systems, making it amenable for continued observations. It is one of only five systems with measured masses and radii for all four transiting planets. The planet densities range from 0.70 ± 0.24 to 3.21 ± 0.44 g cm–3, implying a range of bulk and atmospheric compositions. We also report a fifth planet candidate found in the RV data with a minimum mass of 25.6 ± 3.6 M⊕. This planet candidate is exterior to TOI-1246 e, with a candidate period of 93.8 days, and we discuss the implications if it is confirmed to be planetary in nature.

Abstract Copyright: © 2022. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Exoplanet astronomy - Mini Neptunes - Exoplanets - Radial velocity - Transits - Transit photometry - Transit timing variation method - Exoplanet systems

VizieR on-line data: <Available at CDS (J/AJ/163/293): table2.dat>

Simbad objects: 44

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Number of rows : 44
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 WT 2353 PM* 00 29 12.3029193648 -30 27 13.466857032   13.05 11.95     ~ 102 0
2 HD 5278b Pl 00 50 09.9045832224 -83 44 38.032610136           ~ 17 0
3 HD 15337c Pl 02 27 28.3781273256 -27 38 06.736755624           ~ 30 0
4 NAME LP 424-4b Pl 07 59 05.8395356736 +15 23 29.236065000           ~ 387 1
5 L 98-59 PM* 08 18 07.6214406393 -68 18 46.805365587   13.22 11.685 11.294 9.25 M3V 135 0
6 TOI-561 MS* 09 52 44.5491687624 +06 12 58.920960204   10.909 10.243 10.065   ~ 65 0
7 K2-266d Pl 10 31 44.5056089208 +00 56 15.269139996           ~ 14 0
8 K2-266 PM* 10 31 44.5056089208 +00 56 15.269139996           K5V 39 0
9 HD 108236 PM* 12 26 17.8919204184 -51 21 46.215656244   9.89 9.24     G5V 62 0
10 PSR B1257+12 Psr 13 00 03.1075 +12 40 55.155           ~ 546 1
11 K2-314c Pl 15 12 59.5618336872 -16 43 28.198547940           ~ 16 0
12 K2-38c Pl 16 00 08.0580517944 -23 11 21.329133720           ~ 27 0
13 TOI-1246 MS* 16 44 27.9563758992 +70 25 46.701805764   12.748 11.858 11.728   ~ 23 0
14 TOI-1246c Pl 16 44 27.9563758992 +70 25 46.701805764           ~ 11 0
15 TOI-1246e Pl 16 44 27.9563758992 +70 25 46.701805764           ~ 12 0
16 TOI-1246d Pl 16 44 27.9563758992 +70 25 46.701805764           ~ 9 0
17 TOI-1246b Pl 16 44 27.9563758992 +70 25 46.701805764           ~ 13 0
18 2MASS J16442881+7025480 PM* 16 44 28.8062053951 +70 25 48.141262306           ~ 1 0
19 K2-32b Pl 16 49 42.2601799152 -19 32 34.151379684           ~ 36 0
20 K2-32 PM* 16 49 42.2601799152 -19 32 34.151379684   13.28 12.31 12.11   ~ 66 0
21 BD+44 3020 Em* 18 56 14.3076037320 +44 31 05.389610412   10.45 9.77     G8V 158 1
22 Kepler-282 Ro* 18 58 42.5471457528 +44 47 51.598416912           ~ 69 0
23 Kepler-1661b Pl 19 00 40.1133544368 +41 58 01.388561232           ~ 18 0
24 Kepler-177b Pl 19 04 11.3086186360 +45 03 11.548856286           ~ 37 0
25 Kepler-411 Er* 19 10 25.3469947368 +49 31 23.712634632   13.70 12.55 12.26   K3V 129 0
26 BD+40 3638 Er* 19 14 45.2915908224 +41 09 04.210237980   11.643 11.115 11.009   F6IV 159 1
27 Kepler-33e Pl 19 16 18.6099987120 +46 00 18.813656376           ~ 45 1
28 Kepler-28b Pl 19 28 32.8904682216 +42 25 45.959315016           ~ 41 1
29 Kepler-49c Pl 19 29 10.6951719216 +40 35 30.458944212           ~ 40 1
30 Kepler-595b Pl 19 38 16.8883496904 +50 40 22.860462864           ~ 24 0
31 Kepler-51 Er* 19 45 55.1428629456 +49 56 15.650520684       14.829   G4 165 1
32 Kepler-11d Pl 19 48 27.6226218768 +41 54 32.903163504           ~ 131 1
33 Kepler-89 Ro* 19 49 19.9343204784 +41 53 28.006017936           ~ 175 1
34 Kepler-307b Pl 19 51 10.8252284400 +40 25 03.669502080           ~ 48 0
35 Kepler-223b Pl 19 53 16.4202435936 +47 16 46.308434088           ~ 37 0
36 Kepler-223 Er* 19 53 16.4202435936 +47 16 46.308434088   16.209 15.570 15.78   ~ 192 1
37 Kepler-223c Pl 19 53 16.4202435936 +47 16 46.308434088           ~ 37 0
38 Kepler-48 Er* 19 56 33.4161659688 +40 56 56.496876216   14.253 13.331 13.054   K0V 123 1
39 Kepler-79e Pl 20 02 04.1057010912 +44 22 53.646047436           ~ 52 1
40 Kepler-79 Er* 20 02 04.1057010912 +44 22 53.646047436   14.55 13.98 14.00   F5 136 1
41 WASP-47 * 22 04 48.7261549272 -12 01 07.998743676     11.99 11.82   ~ 217 1
42 WASP-47d Pl 22 04 48.7261549272 -12 01 07.998743676           ~ 62 0
43 HD 218396 El* 23 07 28.7157209544 +21 08 03.310767492   6.21 5.953     F0+VkA5mA5 1285 0
44 K2-138d Pl 23 15 47.7686067840 -10 50 58.895461284           ~ 22 0

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