2023AJ....165..207C

Query : 2023AJ....165..207C

2023AJ....165..207C - Astron. J., 165, 207 (2023/May-0)

Spinning up a Daze: TESS Uncovers a Hot Jupiter Orbiting the Rapid Rotator TOI-778.

CLARK J.T., ADDISON B.C., OKUMURA J., VACH S., ERRICO A., HEITZMANN A., RODRIGUEZ J.E., WRIGHT D.J., CLERTE M., BROWN C.J., FETHEROLF T., WITTENMYER R.A., PLAVCHAN P., KANE S.R., HORNER J., KIELKOPF J.F., SHPORER A., TINNEY C.G., LIU H.-G., BALLARD S., BOWLER B.P., MENGEL M.W., ZHOU G., LEE A.S., DAVID A., HEIM J., LEE M.E., SEVILLA V., ZAFAR N.E., HINKEL N.R., ALLEN B.E., BAYLISS D., BERBERYAN A., BERLIND P., BIERYLA A., BOUCHY F., BRAHM R., BRYANT E.M., CHRISTIANSEN J.L., CIARDI D.R., CIARDI K.N., COLLINS K.A., DALLANT J., DAVIS A.B., DIAZ M.R., DRESSING C.D., ESQUERDO G.A., HARRE J.-V., HOWELL S.B., JENKINS J.M., JENSEN E.L.N., JONES M.I., JORDAN A., LATHAM D.W., LUND M.B., McCORMAC J., NIELSEN L.D., OTEGI J., QUINN S.N., RADFORD D.J., RICKER G.R., SCHWARZ R.P., SEAGER S., SMITH A.M.S., STOCKDALE C., TAN T.-G., UDRY S., VANDERSPEK R., GUNTHER M.N., WANG S., WINGHAM G. and WINN J.N.

Abstract (from CDS):

NASA's Transiting Exoplanet Survey Satellite (TESS) mission has been uncovering a growing number of exoplanets orbiting nearby, bright stars. Most exoplanets that have been discovered by TESS orbit narrow-line, slow-rotating stars, facilitating the confirmation and mass determination of these worlds. We present the discovery of a hot Jupiter orbiting a rapidly rotating ($v\sin \,(i)=35.1\pm 1.0$ km s–1) early F3V-dwarf, HD 115447 (TOI-778). The transit signal taken from Sectors 10 and 37 of TESS's initial detection of the exoplanet is combined with follow-up ground-based photometry and velocity measurements taken from MINERVA-Australis, TRES, CORALIE, and CHIRON to confirm and characterize TOI-778 b. A joint analysis of the light curves and the radial velocity measurements yields a mass, a radius, and an orbital period for TOI-778 b of ${2.76}_{-0.23}^{+0.24}$MJ, 1.370 ± 0.043 RJ, and ∼4.63 days, respectively. The planet orbits a bright (V = 9.1 mag) F3-dwarf with M = 1.40 ± 0.05 M⊙, R = 1.70 ± 0.05 R⊙, and $\mathrm{log}g=4.05\pm 0.17$. We observed a spectroscopic transit of TOI-778 b, which allowed us to derive a sky-projected spin-orbit angle of 18° ± 11°, consistent with an aligned planetary system. This discovery demonstrates the capability of smaller-aperture telescopes such as MINERVA-Australis to detect the radial velocity signals produced by planets orbiting broad-line, rapidly rotating stars.

Abstract Copyright: © 2023. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Exoplanets - Radial velocity - Transit photometry - Dynamical evolution

VizieR on-line data: <Available at CDS (J/AJ/165/207): table1.dat fig1.dat fig6.dat>

Simbad objects: 17

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Number of rows : 17
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 WASP-93b Pl 00 37 50.1101776896 +51 17 19.560773724           ~ 19 0
2 NAME V1298 Tau c Pl 04 05 19.5909996648 +20 09 25.563233736           ~ 64 0
3 NAME V1298 Tau b Pl 04 05 19.5909996648 +20 09 25.563233736           ~ 79 0
4 TOI-942c Pl 05 06 35.8911413136 -20 14 44.143841292           ~ 19 0
5 HATS-70b Pl 07 16 25.0880019528 -31 14 39.858342180           ~ 50 0
6 HAT-P-69b Pl 08 42 01.3562355288 +03 42 38.021676300           ~ 23 0
7 HD 114672 * 13 13 22.9237545288 -65 16 41.674676340 11.61 10.63 9.48     K0/2(III) 14 0
8 HD 115447 PM* 13 17 20.1889201896 -15 16 24.934687068   9.51 9.11     F3V 19 0
9 HD 115447b Pl 13 17 20.1889201896 -15 16 24.934687068           ~ 5 0
10 HD 120411b Pl 13 50 06.2797027704 -40 50 08.881076364           ~ 60 0
11 HD 133112 PM* 15 02 44.8678907928 -03 01 52.986571896   6.788 6.618     A4/5IV/V 86 0
12 CoRoT-11b Pl 18 42 44.9499236256 +05 56 15.652972716           ~ 52 1
13 Kepler-1658b Pl 19 37 25.5732756048 +38 56 50.518200048           ~ 52 0
14 HD 197481b Pl 20 45 09.5324974119 -31 20 27.237889841           ~ 158 0
15 * 51 Peg b Pl 22 57 27.9804852576 +20 46 07.797040104           ~ 744 1
16 * gam Cep SB* 23 39 20.9104133784 +77 37 56.510781384 5.190 4.250   2.6   K1III-IVCN1 626 1
17 HD 222259Ab Pl 23 39 39.4808078664 -69 11 44.707735104           ~ 73 0

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