2025A&A...697A.169C

Query : 2025A&A...697A.169C

2025A&A...697A.169C - Astronomy and Astrophysics, volume 697A169 (2025/5-1)

TOI-3493 b: A planet with a Neptune-like density transiting a bright G0-type star.

CHATURVEDI P., GOFFO E., GANDOLFI D., PERSSON C.M., HATZES A.P., NOWAK G., BONFANTI A., BIERYLA A., COCHRAN W.D., COLLINS K.A., FAJARDO-ACOSTA S.B., HOWELL S.B., JENKINS J.M., KORTH J., LIVINGSTON J., PALLE E., QUINN S.N., SCHWARZ R.P., SEAGER S., SHPORER A., STASSUN K.G., STRIEGEL S., VAN EYLEN V., WATKINS C.N., WINN J.N. and ZIEGLER C.

Abstract (from CDS):

We report the discovery of TOI-3493 b, a sub-Neptune-sized planet on an 8.15-d orbit transiting the bright (V=9.3) G0 star HD 119355 (aka TIC 203377303) initially identified by NASA's TESS space mission. With the aim of confirming the planetary nature of the transit signal detected by TESS and determining the mass of the planet, we performed an intensive Doppler campaign with the HARPS spectrograph, collecting radial velocity measurements. We found that TOI-3493 b lies in a nearly circular orbit and has a mass of 9.0 ± 1.2 M⊕ and a radius of 3.22 ± 0.08 R⊕, implying a bulk density of 1.47–0.22+0.23 g cm–3, consistent with a composition comprising a small solid core surrounded by a thick H/He-dominated atmosphere.

Abstract Copyright: © The Authors 2025

Journal keyword(s): techniques: photometric - techniques: radial velocities - planets and satellites: detection - stars: individual: TOI-3493 - stars: solar-type

VizieR on-line data: <Available at CDS (J/A+A/697/A169): tableb1.dat>

Simbad objects: 4

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Number of rows : 4
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 HD 1920 * 00 23 31.7298595152 -07 11 14.251226712   10.70 10.21     F3/5V 6 0
2 HD 119355 PM* 13 43 11.7194605008 -22 35 06.479091780   9.93 9.32     G1/2V 8 0
3 HD 119355b Pl 13 43 11.7194605008 -22 35 06.479091780           ~ 1 0
4 HD 191939b Pl 20 08 05.7551464176 +66 51 02.076637068           ~ 28 0

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