2017A&A...604A.110A


Query : 2017A&A...604A.110A

2017A&A...604A.110A - Astronomy and Astrophysics, volume 604A, 110-110 (2017/8-1)

The discoveries of WASP-91b, WASP-105b and WASP-107b: Two warm Jupiters and a planet in the transition region between ice giants and gas giants.

ANDERSON D.R., COLLIER CAMERON A., DELREZ L., DOYLE A.P., GILLON M., HELLIER C., JEHIN E., LENDL M., MAXTED P.F.L., MADHUSUDHAN N., PEPE F., POLLACCO D., QUELOZ D., SEGRANSAN D., SMALLEY B., SMITH A.M.S., TRIAUD A.H.M.J., TURNER O.D., UDRY S. and WEST R.G.

Abstract (from CDS):

We report the discoveries of three transiting exoplanets. WASP-91b is a warm Jupiter (1.34MJup, 1.03RJup) in a 2.8-day orbit around a metal-rich K3 star. WASP-105b is a warm Jupiter (1.8MJup, 0.96RJup) in a 7.9-day orbit around a metal-rich K2 star. WASP-107b is a warm super-Neptune/sub-Saturn (0.12MJup, 0.94RJup) in a 5.7-day orbit around a solar-metallicity K6 star. Considering that giant planets seem to be more common around stars of higher metallicity and stars of higher mass, it is notable that the hosts are all metal-rich, late-type stars. With orbital separations that place both WASP-105b and WASP-107b in the weak-tide regime, measurements of the alignment between the planets' orbital axes and their stars' spin axes may help us to understand the inward migration of short-period, giant planets. The mass of WASP-107b (2.2MNep, 0.40MSat) places it in the transition region between the ice giants and gas giants of the Solar System. Its radius of 0.94RJup suggests that it is a low-mass gas giant with a H/He-dominated composition. The planet thus sets a lower limit of 2.2MNep on the planetary mass above which large gaseous envelopes can be accreted and retained by proto-planets on their way to becoming gas giants. We may discover whether WASP-107b more closely resembles an ice giant or a gas giant by measuring its atmospheric metallicity via transmission spectroscopy, for which WASP-107b is a very good target.

Abstract Copyright: © ESO, 2017

Journal keyword(s): planets and satellites: formation - planets and satellites: individual: WASP-91b - planetary systems - planets and satellites: individual: WASP-105b - planets and satellites: individual: WASP-107b - planets and satellites: individual: WASP-107b

Simbad objects: 17

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Number of rows : 17
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 WASP-105 * 01 36 40.3518434784 -50 39 33.141252960   12.94 12.04 11.89   K6 7 0
2 WASP-105b Pl 01 36 40.3525037770 -50 39 33.184315170           ~ 5 0
3 WASP-139b Pl 03 18 14.9435363553 -41 18 07.664491959           ~ 14 0
4 WASP-84b Pl 08 44 25.7032891140 +01 51 36.106556176           ~ 20 0
5 WASP-43b Pl 10 19 38.0089444408 -09 48 22.603103969           ~ 279 1
6 K2-235b Pl 12 33 32.8440958980 -10 08 46.223886777           ~ 101 0
7 WASP-107 PM* 12 33 32.8441110816 -10 08 46.225572324   14.62 11.47     K7V 39 0
8 HATS-7b Pl 13 55 25.6669508861 -21 12 27.722673542           ~ 25 0
9 Kepler-9b Pl 19 02 17.7544105084 +38 24 03.177247136           ~ 96 1
10 Kepler-9c Pl 19 02 17.7544105084 +38 24 03.177247136           ~ 92 1
11 Kepler-35b Pl 19 37 59.2726236478 +46 41 22.952068619           ~ 83 1
12 HATS-8b Pl 19 39 46.0127075591 -25 44 54.009190372           ~ 28 0
13 BD-05 5432b Pl 21 00 06.1969250596 -05 05 40.037007561           ~ 85 1
14 WASP-47 * 22 04 48.7261549272 -12 01 07.998743676     11.99 11.82   ~ 127 1
15 WASP-91b Pl 23 51 22.8514144557 -70 09 10.276372490           ~ 7 0
16 WASP-91 PM* 23 51 22.8514314576 -70 09 10.274436540   12.73 11.98     K3 10 0
17 CD-40 15273b Pl 23 51 31.0840161955 -39 54 24.259966546           ~ 62 1

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2022.05.24-11:21:37

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