2015MNRAS.454.4267B

Query : 2015MNRAS.454.4267B

2015MNRAS.454.4267B - Mon. Not. R. Astron. Soc., 454, 4267-4276 (2015/December-3)

Photodynamical mass determination of the multiplanetary system K2-19.

BARROS S.C.C., ALMENARA J.M., DEMANGEON O., TSANTAKI M., SANTERNE A., ARMSTRONG D.J., BARRADO D., BROWN D., DELEUIL M., LILLO-BOX J., OSBORN H., POLLACCO D., ABE L., ANDRE P., BENDJOYA P., BOISSE I., BONOMO A.S., BOUCHY F., BRUNO G., CERDA J.R., COURCOL B., DIAZ R.F., HEBRARD G., KIRK J., LACHURIE J.C., LAM K.W.F., MARTINEZ P., McCORMAC J., MOUTOU C., RAJPUROHIT A., RIVET J.-P., SPAKE J., SUAREZ O., TOUBLANC D. and WALKER S.R.

Abstract (from CDS):

K2-19 is the second multiplanetary system discovered with K2 observations. The system is composed of two Neptune size planets close to the 3:2 mean-motion resonance. To better characterize the system we obtained two additional transit observations of K2-19b and five additional radial velocity observations. These were combined with K2 data and fitted simultaneously with the system dynamics (photodynamical model) which increases the precision of the transit time measurements. The higher transit time precision allows us to detect the chopping signal of the dynamic interaction of the planets that in turn permits to uniquely characterize the system. Although the reflex motion of the star was not detected, dynamic modelling of the system allowed us to derive planetary masses of Mb = 44±12 M⊕ and Mc = 15.9±7.0 M⊕ for the inner and the outer planets, respectively, leading to densities close to Uranus. We also show that our method allows the derivation of mass ratios using only the 80 d of observations during the first campaign of K2.

Abstract Copyright: © 2015 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2015)

Journal keyword(s): techniques: photometric - techniques: radial velocities - time - planets and satellites: detection - planets and satellites: dynamical evolution and stability - planets and satellites: individual: EPIC201505350, K2-19

Simbad objects: 11

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Number of rows : 11
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 K2-19 * 11 39 50.4803341248 +00 36 12.875047920   13.80 13.00 12.88   G7 75 0
2 K2-19c Pl 11 39 50.4803341248 +00 36 12.875047920           ~ 41 0
3 K2-19b Pl 11 39 50.4803341248 +00 36 12.875047920           ~ 42 0
4 Kepler-9 Er* 19 02 17.7544327200 +38 24 03.176851896     13.9 13.791   G2 223 1
5 Kepler-247 Er* 19 14 34.2067558608 +43 02 21.497067276   16.238 15.458 15.057   ~ 58 0
6 Kepler-117 Er* 19 15 10.3301577216 +48 02 24.785162160   15.056 14.476 14.266 13.69 F2 94 1
7 Kepler-46 Er* 19 17 04.4929642440 +42 36 15.041328444   16.235 15.741 15.314   ~ 94 1
8 Kepler-88b Pl 19 24 35.5430965488 +40 40 09.809893020           ~ 68 1
9 Kepler-88 Er* 19 24 35.5430965488 +40 40 09.809893020   14.192 13.257 13.084   G8IV 101 1
10 * sig Dra PM* 19 32 21.5902098601 +69 39 40.235805206 5.860 5.460 4.680 4.04 3.63 K0V 691 0
11 Kepler-89d Pl 19 49 19.9343204784 +41 53 28.006017936           ~ 93 1

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