2022AJ....163...82W

Query : 2022AJ....163...82W

2022AJ....163...82W - Astron. J., 163, 82-82 (2022/February-0)

TOI-1842b: a transiting warm Saturn undergoing reinflation around an evolving subgiant.

WITTENMYER R.A., CLARK J.T., TRIFONOV T., ADDISON B.C., WRIGHT D.J., STASSUN K.G., HORNER J., LOWSON N., KIELKOPF J., KANE S.R., PLAVCHAN P., SHPORER A., ZHANG H., BOWLER B.P., MENGEL M.W., OKUMURA J., RABUS M., JOHNSON M.C., HARBECK D., TRONSGAARD R., BUCHHAVE L.A., COLLINS K.A., COLLINS K.I., GAN T., JENSEN E.L.N., HOWELL S.B., FURLAN E., GNILKA C.L., LESTER K.V., MATSON R.A., SCOTT N.J., RICKER G.R., VANDERSPEK R., LATHAM D.W., SEAGER S., WINN J.N., JENKINS J.M., RUDAT A., QUINTANA E.V., RODRIGUEZ D.R., CALDWELL D.A., QUINN S.N., ESSACK Z. and BOUMA L.G.

Abstract (from CDS):

The imminent launch of space telescopes designed to probe the atmospheres of exoplanets has prompted new efforts to prioritize the thousands of transiting planet candidates for follow-up characterization. We report the detection and confirmation of TOI-1842b, a warm Saturn identified by TESS and confirmed with ground-based observations from MINERVA-Australis, NRES, and the Las Cumbres Observatory Global Telescope. This planet has a radius of 1.04–0.05+0.06RJ, a mass of 0.214–0.038+0.040MJ, an orbital period of 9.5739–0.0001+0.0002 days, and an extremely low density (ρ = 0.252 ± 0.091 g cm–3). TOI-1842b has among the best known combinations of large atmospheric scale height (893 km) and host-star brightness (J = 8.747 mag), making it an attractive target for atmospheric characterization. As the host star is beginning to evolve off the main sequence, TOI-1842b presents an excellent opportunity to test models of gas giant reinflation. The primary transit duration of only 4.3 hr also makes TOI-1842b an easily-schedulable target for further ground-based atmospheric characterization.

Abstract Copyright: © 2022. The American Astronomical Society. All rights reserved.

Journal keyword(s): Exoplanet detection methods - Transit photometry - Radial velocity - Extrasolar gaseous giant planets

VizieR on-line data: <Available at CDS (J/AJ/163/82): table1.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 BD+01 316b Pl 01 46 31.8575937456 +02 42 02.030065560           ~ 302 0
2 CD-57 1712b Pl 07 22 02.9952922776 -57 23 05.600400108           ~ 14 0
3 BD-03 2978b Pl 10 42 14.0836906368 -03 50 06.260144388           ~ 150 0
4 HD 93396b Pl 10 46 49.7401839144 -09 23 56.495447700           ~ 70 0
5 TOI-1842 Em* 13 27 51.0619960968 +09 01 50.435676912   10.38 9.81     G1 15 0
6 TOI-1842b Pl 13 27 51.0619960968 +09 01 50.435676912           ~ 14 0
7 HD 149026 PM* 16 30 29.6185771608 +38 20 50.308980864   8.75 8.14     G0IV 267 1

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