2020AJ....160...88W


C.D.S. - SIMBAD4 rel 1.7 - 2021.03.05CET18:06:19

2020AJ....160...88W - Astron. J., 160, 88-88 (2020/August-0)

Exploring the atmospheric dynamics of the extreme ultrahot Jupiter KELT-9b using TESS photometry.

WONG I., SHPORER A., KITZMANN D., MORRIS B.M., HENG K., HOEIJMAKERS H.J., DEMORY B.-O., AHLERS J.P., MANSFIELD M., BEAN J.L., DAYLAN T., FETHEROLF T., RODRIGUEZ J.E., BENNEKE B., RICKER G.R., LATHAM D.W., VANDERSPEK R., SEAGER S., WINN J.N., JENKINS J.M., BURKE C.J., CHRISTIANSEN J.L., ESSACK Z., ROSE M.E., SMITH J.C., TENENBAUM P. and YAHALOMI D.

Abstract (from CDS):

We carry out a phase-curve analysis of the KELT-9 system using photometric observations from NASA's Transiting Exoplanet Survey Satellite (TESS). The measured secondary eclipse depth and peak-to-peak atmospheric brightness modulation are 650–15+14 and 566 ± 16 ppm, respectively. The planet's brightness variation reaches maximum 31 ± 5 minutes before the midpoint of the secondary eclipse, indicating a 5.°2 ± 0.°9 eastward shift in the dayside hot spot from the substellar point. We also detect stellar pulsations on KELT-9 with a period of 7.58695 ± 0.00091 hr. The dayside emission of KELT-9b in the TESS bandpass is consistent with a blackbody brightness temperature of 4600 ± 100 K. The corresponding nightside brightness temperature is 3040 ± 100 K, comparable to the dayside temperatures of the hottest known exoplanets. In addition, we detect a significant phase-curve signal at the first harmonic of the orbital frequency and a marginal signal at the second harmonic. While the amplitude of the first harmonic component is consistent with the predicted ellipsoidal distortion modulation assuming equilibrium tides, the phase of this photometric variation is shifted relative to the expectation. Placing KELT-9b in the context of other exoplanets with phase-curve observations, we find that the elevated nightside temperature and relatively low day-night temperature contrast agree with the predictions of atmospheric models that include H2 dissociation and recombination. The nightside temperature of KELT-9b implies an atmospheric composition containing about 50% molecular and 50% atomic hydrogen at 0.1 bar, a nightside emission spectrum that deviates significantly from a blackbody, and a 0.5-2.0 µm transmission spectrum that is featureless at low resolution.

Abstract Copyright: © 2020. The American Astronomical Society. All rights reserved.

Journal keyword(s): Hot Jupiters - Photometry - Exoplanet astronomy

Simbad objects: 18

goto Full paper

goto View the reference in ADS

Number of rows : 18

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 HD 10069 * 01 37 25.0335097438 -45 40 40.376513381   9.74 9.30     F6IV/V 165 1
2 HD 10069b Pl 01 37 25.0335097438 -45 40 40.376513381           ~ 246 1
3 HD 15082b Pl 02 26 51.0582746497 +37 33 01.737746137           ~ 217 1
4 HAT-P-70b Pl 04 58 12.5627446308 +09 59 52.803388353           ~ 6 0
5 CD-38 3220b Pl 07 10 24.0606039387 -39 05 50.570553937           ~ 136 0
6 HD 85628 * 09 50 19.2005724437 -66 06 49.892567590   8.40 8.19     A3V 8 0
7 WASP-19b Pl 09 53 40.0764883458 -45 39 33.055979403           ~ 282 1
8 WASP-103b Pl 16 37 15.5753608801 +07 11 00.119024745           ~ 105 1
9 BD+46 2629 Er* 19 07 53.104944 +46 52 06.00420   10.12 9.70 9.80   A0 134 0
10 BD+46 2629A * 19 07 53.1396671301 +46 52 05.931203366           ~ 30 1
11 KOI-964 EB* 19 13 59.8696403018 +47 59 47.246246759           ~ 44 0
12 BD+47 2846b Pl 19 28 59.3538131541 +47 58 10.216250846           ~ 295 1
13 BD+47 2846 Er* 19 28 59.3538131541 +47 58 10.216250846   10.97 10.48     F6V 263 2
14 HD 187091 EB* 19 46 15.5313838595 +43 56 51.339206744   8.53 8.39     kA3hA5mA5(IV)sAm: 64 0
15 KOI-74 EB* 19 53 17.8104748957 +42 23 18.509934393   10.83 10.70 11.002   A1V 56 1
16 Kepler-462 * 19 59 17.0778794982 +43 48 51.412219563   11.95 11.63     A9V 36 0
17 HD 195689b Pl 20 31 26.3534038246 +39 56 19.765154336           ~ 123 0
18 HD 195689 * 20 31 26.3534038246 +39 56 19.765154336   7.59 7.56     A0 59 0

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2020AJ....160...88W and select 'bookmark this link' or equivalent in the popup menu


2021.03.05-18:06:19

© Université de Strasbourg/CNRS

    • Contact