2020AJ....160..153B

Query : 2020AJ....160..153B

2020AJ....160..153B - Astron. J., 160, 153-153 (2020/October-0)

TOI-824 b: a new planet on the lower edge of the hot Neptune desert.

BURT J.A., NIELSEN L.D., QUINN S.N., MAMAJEK E.E., MATTHEWS E.C., ZHOU G., SEIDEL J.V., HUANG C.X., LOPEZ E., SOTO M., OTEGI J., STASSUN K.G., KREIDBERG L., COLLINS K.A., EASTMAN J.D., RODRIGUEZ J.E., VANDERBURG A., HALVERSON S.P., TESKE J.K., WANG S.X., BUTLER R.P., BOUCHY F., DUMUSQUE X., SEGRANSEN D., SHECTMAN S.A., CRANE J.D., FENG F., MONTET B.T., FEINSTEIN A.D., BELETSKI Y., FLOWERS E., GUNTHER M.N., DAYLAN T., COLLINS K.I., CONTI D.M., GAN T., JENSEN E.L.N., KIELKOPF J.F., TAN T.-G., HELLED R., DORN C., HALDEMANN J., LISSAUER J.J., RICKER G.R., VANDERSPEK R., LATHAM D.W., SEAGER S., WINN J.N., JENKINS J.M., TWICKEN J.D., SMITH J.C., TENENBAUM P., CARTWRIGHT S., BARCLAY T., PEPPER J., ESQUERDO G. and FONG W.

Abstract (from CDS):

We report the detection of a transiting hot Neptune exoplanet orbiting TOI-824 (SCR J1448-5735), a nearby (d = 64 pc) K4V star, using data from the Transiting Exoplanet Survey Satellite. The newly discovered planet has a radius Rp = 2.93 ± 0.20 R⊕ and an orbital period of 1.393 days. Radial velocity measurements using the Planet Finder Spectrograph and the High Accuracy Radial velocity Planet Searcher spectrograph confirm the existence of the planet, and we estimate its mass to be 18.47 ± 1.84 M⊕. The planet's mean density is ρp = 4.03–0.78+0.98gcm–3, making it more than twice as dense as Neptune. TOI-824 b's high equilibrium temperature makes the planet likely to have a cloud-free atmosphere, and thus it is an excellent candidate for follow-up atmospheric studies. The detectability of TOI-824 b's atmosphere from both ground and space is promising and could lead to the detailed characterization of the most irradiated small planet at the edge of the hot Neptune desert that has retained its atmosphere to date.

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

Journal keyword(s): Exoplanet astronomy - Exoplanet detection methods - Exoplanets - Transit photometry - Radial velocity - Stellar properties

Simbad objects: 18

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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 - 2026 		#notes
1 NGC 1039 OpC 02 42 09.1 +42 44 02           ~ 467 0
2 Cl Melotte 25 OpC 04 30 27.4 +16 46 43           ~ 3309 0
3 NGTS-4b Pl 05 58 23.7549496011 -30 48 42.363268864           ~ 47 0
4 NAME LP 424-4b Pl 07 59 05.8395356736 +15 23 29.236065000           ~ 387 1
5 K2-100b Pl 08 38 24.3002838928 +20 06 21.828057218           ~ 83 0
6 NGC 2632 OpC 08 39 58.4 +19 36 33           ~ 1733 0
7 RX J1124.1+3808B LM* 11 24 04.8863943864 +38 08 05.432794728         16.12 M8.5V 25 0
8 Ross 905b Pl 11 42 11.0933350978 +26 42 23.650782778           ~ 913 1
9 NAME NGP reg 12 51 26.275 +27 07 41.70           ~ 1274 0
10 IRAS 14448-5722 Mi* 14 48 36.5963018169 -57 35 12.786213109         14.930 O-rich 5 0
11 TIC 1133968082 * 14 48 37.5604083288 -57 35 16.458865692           ~ 1 0
12 SCR J1448-5735 PM* 14 48 39.8126986608 -57 35 17.557434564   12.263 11.153 10.820 9.92 K4V 25 0
13 NAME SCR J1448-5735b Pl 14 48 39.8126986608 -57 35 17.557434564           ~ 28 0
14 NGC 6475 OpC 17 53 44.1 -34 49 36           ~ 413 0
15 BD+47 2936b Pl 19 50 50.2472976936 +48 04 51.101390496           ~ 493 1
16 CD-44 14956b Pl 22 33 35.8684307688 -43 26 11.916565332           ~ 22 0
17 HD 219666b Pl 23 18 13.6298981445 -56 54 14.035920520           ~ 32 0
18 CD-38 15670b Pl 23 54 40.2073116552 -37 37 40.524416508           ~ 79 0

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