2021MNRAS.502.4842O

Query : 2021MNRAS.502.4842O

2021MNRAS.502.4842O - Mon. Not. R. Astron. Soc., 502, 4842-4857 (2021/April-3)

A hot mini-Neptune in the radius valley orbiting solar analogue HD 110113.

OSBORN H.P., ARMSTRONG D.J., ADIBEKYAN V., COLLINS K.A., DELGADO-MENA E., HOWELL S.B., HELLIER C., KING G.W., LILLO-BOX J., NIELSEN L.D., OTEGI J.F., SANTOS N.C., ZIEGLER C., ANDERSON D.R., BRICENO C., BURKE C., BAYLISS D., BARRADO D., BRYANT E.M., BROWN D.J.A., BARROS S.C.C., BOUCHY F., CALDWELL D.A., CONTI D.M., DIAZ R.F., DRAGOMIR D., DELEUIL M., DEMANGEON O.D.S., DORN C., DAYLAN T., FIGUEIRA P., HELLED R., HOYER S., JENKINS J.M., JENSEN E.L.N., LATHAM D.W., LAW N., LOUIE D.R., MANN A.W., OSBORN A., POLLACCO D.L., RODRIGUEZ D.R., RACKHAM B.V., RICKER G., SCOTT N.J., SOUSA S.G., SEAGER S., STASSUN K.G., SMITH J.C., STROM P., UDRY S., VILLASENOR J., VANDERSPEK R., WEST R., WHEATLEY P.J. and WINN J.N.

Abstract (from CDS):

We report the discovery of HD 110113 b (TESS object of interest-755.01), a transiting mini-Neptune exoplanet on a 2.5-d orbit around the solar-analogue HD 110113 (Teff = 5730 K). Using TESS photometry and High Accuracy Radial velocity Planet Searcher (HARPS) radial velocities gathered by the NCORES program, we find that HD 110113 b has a radius of 2.05 ± 0.12 R⊕ and a mass of 4.55 ± 0.62 M⊕. The resulting density of 2.90+0.75–0.59 g cm–3 is significantly lower than would be expected from a pure-rock world; therefore HD 110113 b must be a mini-Neptune with a significant volatile atmosphere. The high incident flux places it within the so-called radius valley; however, HD 110113 b was able to hold on to a substantial (0.1-1 per cent) H-He atmosphere over its ∼4 Gyr lifetime. Through a novel simultaneous Gaussian process fit to multiple activity indicators, we were also able to fit for the strong stellar rotation signal with period 20.8 ± 1.2 d from the RVs and confirm an additional non-transiting planet, HD 110113 c, which has a mass of 10.5 ± 1.2 M⊕ and a period of 6.744+0.008–0.009 d.

Abstract Copyright: © 2021 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society

Journal keyword(s): planets and satellites: detection - stars: individual: HD110113

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

CDS comments: TOI-735 is a probable misprint for TOI-732.

Simbad objects: 14

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Number of rows : 14
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-125 PM* 01 34 22.7341114800 -66 40 32.951081784   11.72 11.02     ~ 38 0
2 TOI-849b Pl 01 54 51.7040408544 -29 25 18.468394788           ~ 59 0
3 BD-14 1137c Pl 05 27 24.8258862552 -14 16 37.046186364           ~ 26 0
4 * pi. Men c Pl 05 37 09.8868446714 -80 28 08.834553264           ~ 117 0
5 G 162-44 PM* 10 18 35.1372361341 -11 43 00.243355403   14.68 13.14 12.84   M4.0 98 0
6 Ross 905b Pl 11 42 11.0933350978 +26 42 23.650782778           ~ 913 1
7 HD 110113 * 12 40 08.7806178168 -44 18 43.266257352   10.76 10.05     G8V 34 0
8 HD 110113c Pl? 12 40 08.7806178168 -44 18 43.266257352           ~ 3 0
9 HD 110113b Pl 12 40 08.7806178168 -44 18 43.266257352           ~ 12 0
10 NAME Proxima Centauri PM* 14 29 42.9461331854 -62 40 46.164680672 14.21 12.95 11.13 9.45 7.41 M5.5Ve 1483 0
11 * nu.02 Lup PM* 15 21 48.1499105161 -48 19 03.469906910 6.35 6.30 5.65     G2-V 354 1
12 NAME G 139-21b Pl 17 15 18.9339850845 +04 57 50.066612336           ~ 845 1
13 Kepler-78b Pl 19 34 58.0137407208 +44 26 53.960186940           ~ 153 1
14 BD-02 5958b Pl 23 27 04.8376907739 -01 17 10.582653030           ~ 78 0

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