2021AJ....161...82S

Query : 2021AJ....161...82S

2021AJ....161...82S - Astron. J., 161, 82-82 (2021/February-0)

TOI-954 b and K2-329 b: short-period Saturn-mass planets that test whether irradiation leads to inflation.

SHA L., HUANG C.X., SHPORER A., RODRIGUEZ J.E., VANDERBURG A., BRAHM R., HAGELBERG J., MATTHEWS E.C., ZIEGLER C., LIVINGSTON J.H., STASSUN K.G., WRIGHT D.J., CRANE J.D., ESPINOZA N., BOUCHY F., BAKOS G.A., COLLINS K.A., ZHOU G., BIERYLA A., HARTMAN J.D., WITTENMYER R.A., NIELSEN L.D., PLAVCHAN P., BAYLISS D., SARKIS P., TAN T.-G., CLOUTIER R., MANCINI L., JORDAN A., WANG S., HENNING T., NARITA N., PENEV K., TESKE J.K., KANE S.R., MANN A.W., ADDISON B.C., TAMURA M., HORNER J., BARBIERI M., BURT J.A., DIAZ M.R., CROSSFIELD I.J.M., DRAGOMIR D., DRASS H., FEINSTEIN A.D., ZHANG H., HART R., KIELKOPF J.F., JENSEN E.L.N., MONTET B.T., OTTONI G., SCHWARZ R.P., ROJAS F., NESPRAL D., TORRES P., MENGEL M.W., UDRY S., ZAPATA A., SNODDY E., OKUMURA J., RICKER G.R., VANDERSPEK R.K., LATHAM D.W., WINN J.N., SEAGER S., JENKINS J.M., COLON K.D., HENZE C.E., KRISHNAMURTHY A., TING E.B., VEZIE M. and VILLANUEVA S.

Abstract (from CDS):

We report the discovery of two short-period Saturn-mass planets, one transiting the G subgiant TOI-954 (TIC 44792534, V = 10.343, T = 9.78) observed in TESS sectors 4 and 5 and one transiting the G dwarf K2-329 (EPIC 246193072, V = 12.70, K = 10.67) observed in K2 campaigns 12 and 19. We confirm and characterize these two planets with a variety of ground-based archival and follow-up observations, including photometry, reconnaissance spectroscopy, precise radial velocity, and high-resolution imaging. Combining all available data, we find that TOI-954 b has a radius of 0.852–0.062+0.053RJ and a mass of 0.174–0.017+0.018 MJ and is in a 3.68 day orbit, while K2-329 b has a radius of 0.774–0.024+0.026RJ and a mass of 0.260–0.022+0.020 MJ and is in a 12.46 day orbit. As TOI-954 b is 30 times more irradiated than K2-329 b but more or less the same size, these two planets provide an opportunity to test whether irradiation leads to inflation of Saturn-mass planets and contribute to future comparative studies that explore Saturn-mass planets at contrasting points in their lifetimes.

Abstract Copyright: © 2021. The American Astronomical Society. All rights reserved.

Journal keyword(s): Exoplanet systems - Photometry - Transit photometry - Spectroscopy - High resolution spectroscopy - RV - G stars - G dwarf stars - G subgiant stars - Hot Jupiters

VizieR on-line data: <Available at CDS (J/AJ/161/82): table[123456].dat table10.dat table11.dat>

Simbad objects: 7

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Number of rows : 7
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 CD-25 1737 * 04 07 45.8606793528 -25 12 31.231048320   11.10 10.38 10.36   ~ 16 1
2 CD-25 1737b Pl 04 07 45.8606793528 -25 12 31.231048320           ~ 9 0
3 UCAC4 324-004715 * 04 07 47.4898707456 -25 13 14.582155080   14.796 13.851 13.784   ~ 1 0
4 BD+31 2447b Pl 13 03 55.6466582304 +30 38 24.278530344           ~ 47 1
5 K2-329b Pl 23 24 32.4760991064 -05 09 50.728115916           ~ 12 0
6 K2-329 * 23 24 32.4760991064 -05 09 50.728115916           ~ 10 0
7 HD 221416b Pl 23 32 08.0723503368 -21 48 05.114065284           ~ 20 0

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