2023MNRAS.524.3877H

Query : 2023MNRAS.524.3877H

2023MNRAS.524.3877H - Mon. Not. R. Astron. Soc., 524, 3877-3893 (2023/September-3)

TOI-908: a planet at the edge of the Neptune desert transiting a G-type star.

HAWTHORN F., BAYLISS D., ARMSTRONG D.J., FERNANDEZ FERNANDEZ J., OSBORN A., SOUSA S.G., ADIBEKYAN V., DAVOULT J., COLLINS K.A., ALIBERT Y., BARROS S.C.C., BOUCHY F., BROGI M., CIARDI D.R., DAYLAN T., DELGADO MENA E., DEMANGEON O.D.S., DIAZ R.F., GAN T., HORNE K., HOYER S., JENKINS J.M., JENSEN E.L.N., KIELKOPF J.F., KOSTOV V., LATHAM D.W., LEVINE A.M., LILLO-BOX J., NIELSEN L.D., OSBORN H.P., RICKER G.R., RODRIGUES J., SANTOS N.C., SCHWARZ R.P., SEAGER S., SERRANO BELL J., SHPORER A., STOCKDALE C., STROM P.A., TENENBAUM P., UDRY S., WHEATLEY P.J., WINN J.N. and ZIEGLER C.

Abstract (from CDS):

We present the discovery of an exoplanet transiting TOI-908 (TIC-350153977) using data from TESS sectors 1, 12, 13, 27, 28, and 39. TOI-908 is a T = 10.7 mag G-dwarf (Teff = 5626 ± 61 K) solar-like star with a mass of 0.950 ± 0.010 M⊙ and a radius of 1.028 ± 0.030 R⊙. The planet, TOI-908 b, is a 3.18 ± 0.16 R⊕ planet in a 3.18 d orbit. Radial velocity measurements from HARPS reveal TOI-908 b has a mass of approximately 16.1 ± 4.1 M⊕, resulting in a bulk planetary density of $2.7^{+0.2}_{-0.4}$ g cm–3. TOI-908 b lies in a sparsely populated region of parameter space known as the Neptune desert. The planet likely began its life as a sub-Saturn planet before it experienced significant photoevaporation due to X-rays and extreme ultraviolet radiation from its host star, and is likely to continue evaporating, losing a significant fraction of its residual envelope mass.

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-908 (TIC-350153977, GAIA DR3 46192380870592067842)

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

Simbad objects: 9

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Number of rows : 9
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 WT 2353 PM* 00 29 12.3029193648 -30 27 13.466857032   13.05 11.95     ~ 102 0
2 TOI-849b Pl 01 54 51.7040408544 -29 25 18.468394788           ~ 59 0
3 TOI-908 * 03 32 38.2224062904 -81 15 02.676572424   11.959 11.235     ~ 19 0
4 TOI-908b Pl 03 32 38.2224062904 -81 15 02.676572424           ~ 6 0
5 NGTS-4b Pl 05 58 23.7549496011 -30 48 42.363268864           ~ 47 0
6 TOI-969b Pl 07 40 32.8397895312 +02 05 56.124745152           ~ 11 0
7 L 98-59 PM* 08 18 07.6214406393 -68 18 46.805365587   13.22 11.685 11.294 9.25 M3V 135 0
8 * nu.02 Lup PM* 15 21 48.1499105161 -48 19 03.469906910 6.35 6.30 5.65     G2-V 354 1
9 CD-38 15670b Pl 23 54 40.2073116552 -37 37 40.524416508           ~ 79 0

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