SIMBAD references

2018MNRAS.477L..21M - Mon. Not. R. Astron. Soc., 477, L21-L24 (2018/June-2)

Pre-discovery transits of the exoplanets WASP-18b and WASP-33b from Hipparcos.

McDONALD I. and KERINS E.

Abstract (from CDS):

We recover transits of WASP-18b and WASP-33b from Hipparcos (1989-1993) photometry. Marginal detections of HAT-P-56b and HAT-P-2b may be also present in the data. New ephemerides are fitted to WASP-18b and WASP-33b. A tentative (∼1.3σ) orbital decay is measured for WASP-18b, but the implied tidal quality factor (Q ∼ 5 x 105) is small and survival time (<106 yr) is too short to be likely. No orbital decay is measured for WASP-33b, and a limit of Q > 2 x 105 is placed. For both planets, the uncertainties in published ephemerides appear underestimated: the uncertainty in the period derivative of WASP-18b would be greatly reduced if its current ephemeris could be better determined.

Abstract Copyright: © 2018 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): planets and satellites: dynamical evolution and stability - planets and satellites: individual: WASP-18b - planets and satellites: individual: WASP-33b - planet-star interactions - stars: variables: d Scuti

Simbad objects: 24

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