An Analysis of Transiting Hot Jupiters Observed with K2: WASP-55b and WASP-75b

作者：Clark B J M; Anderson D R; Hellier C; Turner O D; Mocnik T

来源：Publications of the Astronomical Society of the Pacific, 2018, 130(985): 034401.

DOI：10.1088/1538-3873/aaa33e

• planets and satellites: individual (WASP-75b, WASP-55b)
• stars: individual: (WASP-75, WASP-55, EPIC 206154641, EPIC 212300977)

We present our analysis of the K2 short-cadence data of two previously known hot Jupiter exoplanets: WASP-55b and WASP-75b. The high precision of the K2 light curves enabled us to search for transit timing and duration variations, rotational modulation, starspots, phase-curve variations and additional transiting planets. We identified stellar variability in the WASP-75 light curve which may be an indication of rotational modulation, with an estimated period of 11.2. +/-. 1.5 days. We combined this with the spectroscopically measuredvsin(i(*)) to calculate a possible line of sight projected inclination angle of i(*) = 41 degrees +/- 16 degrees We also perform a global analysis of K2 and previously published data to refine the system parameters.

• 出版日期2018-3