2023MNRAS.520.3649H

Query : 2023MNRAS.520.3649H

2023MNRAS.520.3649H - Mon. Not. R. Astron. Soc., 520, 3649-3668 (2023/April-2)

TOI-836: A super-Earth and mini-Neptune transiting a nearby K-dwarf.

HAWTHORN F., BAYLISS D., WILSON T.G., BONFANTI A., ADIBEKYAN V., ALIBERT Y., SOUSA S.G., COLLINS K.A., BRYANT E.M., OSBORN A., ARMSTRONG D.J., ABE L., ACTON J.S., ADDISON B.C., AGABI K., ALONSO R., ALVES D.R., ANGLADA-ESCUDE G., BARCZY T., BARCLAY T., BARRADO D., BARROS S.C.C., BAUMJOHANN W., BENDJOYA P., BENZ W., BIERYLA A., BONFILS X., BOUCHY F., BRANDEKER A., BROEG C., BROWN D.J.A., BURLEIGH M.R., BUTTU M., CABRERA J., CALDWELL D.A., CASEWELL S.L., CHARBONNEAU D., CHARNOZ S., CLOUTIER R., CAMERON A.C., COLLINS K.I., CONTI D.M., CROUZET N., CZISMADIA S., DAVIES M.B., DELEUIL M., DELGADO-MENA E., DELREZ L., DEMANGEON O.D.S., DEMORY B.-O., DRANSFIELD G., DUMUSQUE X., EGGER J.A., EHRENREICH D., EIGMULLER P., ERICKSON A., ESSACK Z., FORTIER A., FOSSATI L., FRIDLUND M., GUNTHER M.N., GUDEL M., GANDOLFI D., GILLARD H., GILLON M., GNILKA C., GOAD M.R., GOEKE R.F., GUILLOT T., HADJIGEORGHIOU A., HELLIER C., HENDERSON B.A., HENG K., HOOTON M.J., HORNE K., HOWELL S.B., HOYER S., IRWIN J.M., JENKINS J.S., JENKINS J.M., JENSEN E.L.N., KANE S.R., KENDALL A., KIELKOPF J.F., KISS L.L., LACEDELLI G., LASKAR J., LATHAM D.W., LECAVELIER DES ETANGS A., LELEU A., LENDL M., LILLO-BOX J., LOVIS C., MEKARNIA D., MASSEY B., MASTERS T., MAXTED P.F.L., NASCIMBENI V., NIELSEN L.D., O'BRIEN S.M., OLOFSSON G., OSBORN H.P., PAGANO I., PALLE E., PERSSON C.M., PIOTTO G., PLAVCHAN P., POLLACCO D., QUELOZ D., RAGAZZONI R., RAUER H., RIBAS I., RICKER G., SEGRANSAN D., SALMON S., SANTERNE A., SANTOS N.C., SCANDARIATO G., SCHMIDER F.-X., SCHWARZ R.P., SEAGER S., SHPORER A., SIMON A.E., SMITH A.M.S., SRDOC G., STELLER M., SUAREZ O., SZABO G.M., TESKE J., THOMAS N., TILBROOK R.H., TRIAUD A.H.M.J., UDRY S., VAN GROOTEL V., WALTON N., WANG S.X., WHEATLEY P.J., WINN J.N., WITTENMYER R.A. and ZHANG H.

Abstract (from CDS):

We present the discovery of two exoplanets transiting TOI-836 (TIC 440887364) using data from TESS Sector 11 and Sector 38. TOI-836 is a bright (T = 8.5 mag), high proper motion (∼200 mas yr–1), low metallicity ([Fe/H]≈-0.28) K-dwarf with a mass of 0.68 ± 0.05 M⊙ and a radius of 0.67 ± 0.01 R⊙. We obtain photometric follow-up observations with a variety of facilities, and we use these data sets to determine that the inner planet, TOI-836 b, is a 1.70 ± 0.07 R⊕ super-Earth in a 3.82-d orbit, placing it directly within the so-called 'radius valley'. The outer planet, TOI-836 c, is a 2.59 ± 0.09 R⊕ mini-Neptune in an 8.60-d orbit. Radial velocity measurements reveal that TOI-836 b has a mass of 4.5 ± 0.9 M⊕, while TOI-836 c has a mass of 9.6 ± 2.6 M⊕. Photometric observations show Transit Timing Variations (TTVs) on the order of 20 min for TOI-836 c, although there are no detectable TTVs for TOI-836 b. The TTVs of planet TOI-836 c may be caused by an undetected exterior planet.

Abstract Copyright: © 2023 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society

Journal keyword(s): techniques: photometric - techniques: radial velocities - planets and satellites: detection - stars: individual: TOI-836 (TIC 440887364, GAIA EDR3 6230733559097425152)

Status at CDS : Large table(s) will be appraised for possible ingestion in VizieR.

Simbad objects: 7

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Number of rows : 7
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 CD-26 2288 PM* 05 33 04.6005234792 -26 43 28.268361984   10.17 9.13     K3+Vk: 79 0
2 LSPM J1008+6916b Pl 10 08 51.8069885952 +69 16 35.560317504           ~ 44 0
3 2MASS J15001874-2427022 * 15 00 18.7665013442 -24 27 02.342566618           ~ 1 0
4 CD-23 12010 PM* 15 00 19.3983970152 -24 27 14.693874372   11.15 9.937 9.843   K7V 53 0
5 CD-23 12010c Pl 15 00 19.3983970152 -24 27 14.693874372           ~ 29 0
6 CD-23 12010b Pl 15 00 19.3983970152 -24 27 14.693874372           ~ 32 0
7 * 51 Peg b Pl 22 57 27.9804852576 +20 46 07.797040104           ~ 744 1

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