SIMBAD references

2019MNRAS.490.4230S - Mon. Not. R. Astron. Soc., 490, 4230-4236 (2019/December-2)

Transit timing variations in the WASP-4 planetary system.

SOUTHWORTH J., DOMINIK M., JORGENSEN U.G., ANDERSEN M.I., BOZZA V., BURGDORF M.J., D'AGO G., DIB S., FIGUERA JAIMES R., FUJII Y.I., GILL S., HAIKALA L.K., HINSE T.C., HUNDERTMARK M., KHALOUEI E., KORHONEN H., LONGA-PENA P., MANCINI L., PEIXINHO N., RABUS M., RAHVAR S., SAJADIAN S., SKOTTFELT J., SNODGRASS C., SPYRATOS P., TREGLOAN-REED J., UNDA-SANZANA E. and VON ESSEN C.

Abstract (from CDS):

Transits in the planetary system WASP-4 were recently found to occur 80 s earlier than expected in observations from the TESS satellite. We present 22 new times of mid-transit that confirm the existence of transit timing variations, and are well fitted by a quadratic ephemeris with period decay dP/dt = -9.2 ± 1.1 ms yr–1. We rule out instrumental issues, stellar activity, and the Applegate mechanism as possible causes. The light-time effect is also not favoured due to the non-detection of changes in the systemic velocity. Orbital decay and apsidal precession are plausible but unproven. WASP-4 b is only the third hot Jupiter known to show transit timing variations to high confidence. We discuss a variety of observations of this and other planetary systems that would be useful in improving our understanding of WASP-4 in particular and orbital decay in general.

Abstract Copyright: © 2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): stars: activity - stars: fundamental parameters - stars: individual: WASP-4

VizieR on-line data: <Available at CDS (J/MNRAS/490/4230): wasp4all.dat>

Simbad objects: 6

goto Full paper

goto View the reference in ADS

To bookmark this query, right click on this link: simbad:2019MNRAS.490.4230S and select 'bookmark this link' or equivalent in the popup menu


2021.07.25-19:55:20

© Université de Strasbourg/CNRS

    • Contact