2024AJ....167..241E

Query : 2024AJ....167..241E

2024AJ....167..241E - Astron. J., 167, 241 (2024/May-0)

Planet Hunters TESS. V. A Planetary System Around a Binary Star, Including a Mini-Neptune in the Habitable Zone.

EISNER N.L., GRUNBLATT S.K., BARRAGAN O., FARIDANI T.H., LINTOTT C., AIGRAIN S., JOHNSTON C., MASON I.R., STASSUN K.G., BEDELL M., BOYLE A.W., CIARDI D.R., CLARK C.A., HEBRARD G., HOGG D.W., HOWELL S.B., KLEIN B., LLAMA J., WINN J.N., ZHAO L.L., MURPHY J.M.A., BEARD C., BRINKMAN C.L., CHONTOS A., CORTES-ZULETA P., DELFOSSE X., GIACALONE S., GILBERT E.A., HEIDARI N., HOLCOMB R., JENKINS J.M., KIEFER F., LUBIN J., MARTIOLI E., POLANSKI A.S., SAUNDERS N., SEAGER S., SHPORER A., TYLER D., VAN ZANDT J., ALHASSAN S., AMRATLAL D.J., ANTONEL L.I., BENTZEN S.L.S., BOSCH M.K.D., BUNDY D., CHITSIGA I., DELAUNAY J.F., DOISY X., FERSTENOU R., FYNO M., GEARY J.M., HAYNALY G., HERMES P., HUTEN M., LEE S., METCALFE P., PENNELL G.J., PUSZKARSKA J., SCHAFER T., STILLER L., TANNER C., TARR A. and WILKINSON A.

Abstract (from CDS):

We report on the discovery and validation of a transiting long-period mini-Neptune orbiting a bright (V = 9.0 mag) G dwarf (TOI 4633; R = 1.05 R⊙, M = 1.10 M⊙). The planet was identified in data from the Transiting Exoplanet Survey Satellite by citizen scientists taking part in the Planet Hunters TESS project. Modelling of the transit events yields an orbital period of 271.9445 ± 0.0040 days and radius of 3.2 ± 0.20 R⊕. The Earth-like orbital period and an incident flux of ${1.56}_{-0.16}^{+0.20}$F⊕ places it in the optimistic habitable zone around the star. Doppler spectroscopy of the system allowed us to place an upper mass limit on the transiting planet and revealed a non-transiting planet candidate in the system with a period of 34.15 ± 0.15 days. Furthermore, the combination of archival data dating back to 1905 with new high angular resolution imaging revealed a stellar companion orbiting the primary star with an orbital period of around 230 yr and an eccentricity of about 0.9. The long period of the transiting planet, combined with the high eccentricity and close approach of the companion star makes this a valuable system for testing the formation and stability of planets in binary systems.

Abstract Copyright: © 2024. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Exoplanet systems - Exoplanet dynamics - Transit photometry - Binary stars - Habitable zone - Mini Neptunes - Radial velocity

Simbad objects: 8

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Number of rows : 8
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 TOI-700e Pl 06 28 23.2285331376 -65 34 45.520447908           ~ 20 0
2 TOI-700d Pl 06 28 23.2285331376 -65 34 45.520447908           ~ 64 0
3 TOI-715b Pl 07 35 24.2565785240 -73 34 38.825622004           ~ 13 0
4 BD+62 1529c Pl 17 07 22.3960274160 +62 28 33.012400296           ~ 3 0
5 BD+62 1529b Pl 17 07 22.3960274160 +62 28 33.012400296           ~ 1 0
6 BD+62 1529 ** 17 07 22.3960274160 +62 28 33.012400296   9.77 9.02     K0 20 0
7 TOI-4600c Pl 17 13 48.0698585289 +64 33 58.217379576           ~ 7 0
8 HD 162232 ** 17 49 57.0555427 +00 30 43.304836   9.29 8.60     G6V 40 0

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