2024AJ....168..101D

Query : 2024AJ....168..101D

2024AJ....168..101D - Astron. J., 168, 101 (2024/September-0)

An Earth-sized Planet on the Verge of Tidal Disruption.

DAI F., HOWARD A.W., HALVERSON S., ORELL-MIQUEL J., PALLE E., ISAACSON H., FULTON B., PRICE E.M., PLOTNYKOV M., ROGERS L.A., VALENCIA D., PARAGAS K., GREKLEK-MCKEON M., GOMEZ BARRIENTOS J., KNUTSON H.A., PETIGURA E.A., WEISS L.M., LEE R., BRINKMAN C.L., HUBER D., STEFANSSON G., MASUDA K., GIACALONE S., LU C.X., KITE E.S., HU R., GAIDOS E., ZHANG M., RUBENZAHL R.A., WINN J.N., HAN T., BEARD C., HOLCOMB R., HOUSEHOLDER A., GILBERT G.J., LUBIN J., ONG J.M.J., POLANSKI A.S., SAUNDERS N., VAN ZANDT J., YEE S.W., ZHANG J., ZINK J., HOLDEN B., BAKER A., BRODHEIM M., CROSSFIELD I.J.M., DEICH W., EDELSTEIN J., GIBSON S.R., HILL G.M., JELINSKY S.R., KASSIS M., LAHER R.R., LANCLOS K., LILLEY S., PAYNE J.N., RIDER K., ROBERTSON P., ROY A., SCHWAB C., SHAUM A.P., SIRK M.M., SMITH C., VANDENBERG A., WALAWENDER J., WANG S.X., WANG S.-Y., WISHNOW E., WRIGHT J.T., YEH S., CABALLERO J.A., MORALES J.C., MURGAS F., NAGEL E., REINERS A., SCHWEITZER A., TABERNERO H.M., ZECHMEISTER M., SPENCER A., CIARDI D.R., CLARK C.A., LUND M.B., CALDWELL D.A., COLLINS K.A., SCHWARZ R.P., BARKAOUI K., WATKINS C., SHPORER A., NARITA N., FUKUI A., SRDOC G., LATHAM D.W., JENKINS J.M., RICKER G.R., SEAGER S. and VANDERSPEK R.

Abstract (from CDS):

TOI-6255 b (GJ 4256) is an Earth-sized planet (1.079 ± 0.065 R⊕) with an orbital period of only 5.7 hr. With the newly commissioned Keck Planet Finder and CARMENES spectrographs, we determine the planet's mass to be 1.44 ± 0.14 M⊕. The planet is just outside the Roche limit, with Porb/PRoche = 1.13 ± 0.10. The strong tidal force likely deforms the planet into a triaxial ellipsoid with a long axis that is ∼10% longer than the short axis. Assuming a reduced stellar tidal quality factor ${Q}_{\star }^{{\prime} }\approx {10}^{7}$, we predict that tidal orbital decay will cause TOI-6255 to reach the Roche limit in roughly 400 Myr. Such tidal disruptions may produce the possible signatures of planet engulfment that have been seen on stars with anomalously high refractory elemental abundances compared to their conatal binary companions. TOI-6255 b is also a favorable target for searching for star-planet magnetic interactions, which might cause interior melting and hasten orbital decay. TOI-6255 b is a top target (with an Emission Spectroscopy Metric of about 24) for phase-curve observations with the James Webb Space Telescope.

Abstract Copyright: © 2024. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Exoplanet formation - Exoplanet evolution - Star-planet interactions

VizieR on-line data: <Available at CDS (J/AJ/168/101): keck.dat carmenes.dat>

Simbad objects: 25

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Number of rows : 25
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-2445b Pl 02 53 15.8178350377 +00 03 08.779046896           ~ 13 0
2 NAME PM J04343+4302b Pl 04 34 22.4953034088 +43 02 14.692100424           ~ 45 0
3 CD-26 2288b Pl 05 33 04.6005234792 -26 43 28.268361984           ~ 37 0
4 CD-47 2804b Pl 07 06 13.9752770256 -47 35 13.872112260           ~ 20 0
5 * rho01 Cnc e Pl 08 52 35.8111044043 +28 19 50.954994470           ~ 682 1
6 CD-45 5378b Pl 09 44 29.8367689785 -45 46 35.427639685           ~ 86 0
7 TOI-561b Pl 09 52 44.5491687624 +06 12 58.920960204           ~ 61 0
8 K2-22b Pl 11 17 55.8772962552 +02 37 08.603363784           ~ 69 0
9 K2-131b Pl 12 11 00.3783875832 -09 45 54.781040484           ~ 35 0
10 K2-137b Pl 12 27 28.9846732536 -06 11 42.831206628           ~ 31 0
11 BD+39 2643b Pl 13 25 07.9957316160 +38 55 20.944920864           ~ 41 0
12 KOI-1843.03 Pl 19 00 03.1451105376 +40 13 14.798618364           ~ 33 0
13 Kepler-1520 Er* 19 23 51.8899191552 +51 30 16.983425232   17.130 16.117 15.772   ~ 86 1
14 Kepler-1520b Pl 19 23 51.8899191552 +51 30 16.983425232           ~ 89 1
15 Kepler-78b Pl 19 34 58.0137407208 +44 26 53.960186940           ~ 153 1
16 KOI-2700b Pl? 19 48 00.8489502864 +44 46 30.374957496           ~ 46 0
17 TOI-1444b Pl 20 21 53.8348831536 +70 56 37.661103276           ~ 25 0
18 NAME L 210-70b Pl 20 27 42.0813992356 -56 27 25.151894071           ~ 68 0
19 BD+44 3567b Pl 20 45 04.0992448490 +44 29 56.645139366           ~ 17 0
20 WASP-47e Pl 22 04 48.7261549272 -12 01 07.998743676           ~ 98 0
21 Gaia DR3 1956328333129802112 * 22 06 00.0508559809 +39 17 52.689864604           ~ 1 0
22 G 189-1 PM* 22 06 00.6662280633 +39 18 02.897475330   14.34   12.339   M3.0V 36 0
23 NAME G 189-1b Pl 22 06 00.6662280633 +39 18 02.897475330           ~ 8 0
24 NAME L 119-213b Pl 22 41 58.1171811377 -69 10 08.320741850           ~ 146 0
25 K2-141b Pl 23 23 39.9709098120 -01 11 21.448681332           ~ 104 0

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