2020AJ....160..111R

Query : 2020AJ....160..111R

2020AJ....160..111R - Astron. J., 160, 111-111 (2020/September-0)

KELT-25 b and KELT-26 b: a hot Jupiter and a substellar companion transiting young a stars observed by TESS.

RODRIGUEZ MARTINEZ R., GAUDI B.S., RODRIGUEZ J.E., ZHOU G., LABADIE-BARTZ J., QUINN S.N., PENEV K., TAN T.-G., LATHAM D.W., PAREDES L.A., KIELKOPF J.F., ADDISON B., WRIGHT D.J., TESKE J., HOWELL S.B., CIARDI D., ZIEGLER C., STASSUN K.G., JOHNSON M.C., EASTMAN J.D., SIVERD R.J., BEATTY T.G., BOUMA L., BEDDING T., PEPPER J., WINN J., LUND M.B., VILLANUEVA S., STEVENS D.J., JENSEN E.L.N., KILBY C., CRANE J.D., TOKOVININ A., EVERETT M.E., TINNEY C.G., FAUSNAUGH M., COHEN D.H., BAYLISS D., BIERYLA A., CARGILE P.A., COLLINS K.A., CONTI D.M., COLON K.D., CURTIS I.A., DEPOY D.L., EVANS P., FELIZ D.L., GREGORIO J., ROTHENBERG J., JAMES D.J., JONER M.D., KUHN R.B., MANNER M., KHAKPASH S., MARSHALL J.L., McLEOD K.K., PENNY M.T., REED P.A., RELLES H.M., STEPHENS D.C., STOCKDALE C., TRUEBLOOD M., TRUEBLOOD P., YAO X., ZAMBELLI R., VANDERSPEK R., SEAGER S., JENKINS J.M., HENRY T.J., JAMES H.-S., JAO W.-C., WANG S.X., BUTLER P., THOMPSON I., SHECTMAN S., WITTENMYER R., BOWLER B.P., HORNER J., KANE S.R., MENGEL M.W., MORTON T.D., OKUMURA J., PLAVCHAN P., ZHANG H., SCOTT N.J., MATSON R.A., MANN A.W., DRAGOMIR D., GUNTHER M., TING E.B., GLIDDEN A. and QUINTANA E.V.

Abstract (from CDS):

We present the discoveries of KELT-25 b (TIC 65412605, TOI-626.01) and KELT-26 b (TIC 160708862, TOI-1337.01), two transiting companions orbiting relatively bright, early A stars. The transit signals were initially detected by the KELT survey and subsequently confirmed by Transiting Exoplanet Survey Satellite (TESS) photometry. KELT-25 b is on a 4.40 day orbit around the V = 9.66 star CD-24 5016 (Teff=8280–180+440 K, M* = 2.18–0.11+0.12M☉), while KELT-26 b is on a 3.34 day orbit around the V = 9.95 star HD 134004 (Teff = 8640–240+500 K, M* = 1.93–0.16+0.14M☉), which is likely an Am star. We have confirmed the substellar nature of both companions through detailed characterization of each system using ground-based and TESS photometry, radial velocity measurements, Doppler tomography, and high-resolution imaging. For KELT-25, we determine a companion radius of RP = 1.64–0.043+0.039RJ and a 3σ upper limit on the companion's mass of ∼64 MJ. For KELT-26 b, we infer a planetary mass and radius of MP = 1.41–0.51+0.43MJ and RP = 1.94–0.058+0.060RJ. From Doppler tomographic observations, we find KELT-26 b to reside in a highly misaligned orbit. This conclusion is weakly corroborated by a subtle asymmetry in the transit light curve from the TESS data. KELT-25 b appears to be in a well-aligned, prograde orbit, and the system is likely a member of the cluster Theia 449.

Abstract Copyright: © 2020. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Exoplanet astronomy - Transit photometry - Radial velocity

VizieR on-line data: <Available at CDS (J/AJ/160/111): table2.dat fig4.dat fig5i.dat fig5r.dat>

Simbad objects: 19

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Number of rows : 19
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 HD 15082b Pl 02 26 51.0582618096 +37 33 01.736482032           ~ 403 1
2 HD 287325b Pl 04 58 12.5627969184 +09 59 52.804564656           ~ 57 0
3 CD-24 5016b Pl 07 12 29.5499506296 -24 57 12.826133532           ~ 11 0
4 CD-24 5016 * 07 12 29.5499506296 -24 57 12.826133532   9.80 9.63     ~ 19 0
5 HATS-70b Pl 07 16 25.0880019528 -31 14 39.858342180           ~ 50 0
6 BD+07 1721b Pl 07 26 02.2901761080 +07 36 56.815027668           ~ 31 0
7 BD+14 1881b Pl 08 22 28.2046820904 +13 44 07.143774288           ~ 40 0
8 HAT-P-69b Pl 08 42 01.3562355288 +03 42 38.021676300           ~ 23 0
9 HD 85628b Pl 09 50 19.2009107592 -66 06 49.897904652           ~ 36 0
10 HD 133112b Pl 15 02 44.8678907928 -03 01 52.986571896           ~ 144 0
11 HD 134004 * 15 09 04.8933581184 -42 42 17.789374620   10.05 9.95     A1V 37 0
12 HD 134004b Pl 15 09 04.8933581184 -42 42 17.789374620           ~ 59 0
13 BD+10 3472b Pl 18 18 58.4250287592 +10 35 50.129564460           ~ 33 0
14 NAME BD+46 2629Ab Pl 19 07 53.1397066992 +46 52 05.922122844           ~ 181 1
15 HD 185603b Pl 19 38 38.7352230144 +31 13 09.217127532           ~ 184 0
16 HD 332124b Pl 20 19 12.0048114552 +32 34 51.767012820           ~ 24 0
17 HD 195689b Pl 20 31 26.3534153736 +39 56 19.773037500           ~ 358 0
18 HD 195689 SB* 20 31 26.3534153736 +39 56 19.773037500   7.59 7.56     A0 151 0
19 HD 201585b Pl 21 10 12.3723073896 +10 44 19.949472816           ~ 83 0

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