SIMBAD references

2019MNRAS.490.1294B - Mon. Not. R. Astron. Soc., 490, 1294-1312 (2019/November-3)

Homogeneously derived transit timings for 17 exoplanets and reassessed TTV trends for WASP-12 and WASP-4.

BALUEV R.V., SOKOV E.N., JONES H.R.A., SHAIDULIN V.S., SOKOVA I.A., NIELSEN L.D., BENNI P., SCHNEITER E.M., VILLARREAL D'ANGELO C., FERNANDEZ-LAJUS E., DI SISTO R.P., BASTURK O., BRETTON M., WUNSCHE A., HENTUNEN V.-P., SHADICK S., JONGEN Y., KANG W., KIM T., PAKSTIENE E., QVAM J.K.T., KNIGHT C.R., GUERRA P., MARCHINI A., SALVAGGIO F., PAPINI R., EVANS P., SALISBURY M., GARCIA F., MOLINA D., GARLITZ J., ESSEIVA N., OGMEN Y., KARAVAEV Y., RUSOV S., IBRAHIMOV M.A. and KARIMOV R.G.

Abstract (from CDS):

We homogeneously analyse ∼3.2 x 105 photometric measurements for ∼1100 transit light curves belonging to 17 exoplanet hosts. The photometric data cover 16 years (2004-2019) and include amateur and professional observations. Old archival light curves were reprocessed using up-to-date exoplanetary parameters and empirically debiased limb-darkening models. We also derive self-consistent transit and radial-velocity fits for 13 targets. We confirm the non-linear transit timing variation (TTV) trend in the WASP-12 data at a high significance, and with a consistent magnitude. However, Doppler data reveal hints of a radial acceleration of about -7.5 ± 2.2 m s–1 yr–1, indicating the presence of unseen distant companions, and suggesting that roughly 10 per cent of the observed TTV was induced via the light-travel (or Roemer) effect. For WASP-4, a similar TTV trend suspected after the recent TESS observations appears controversial and model dependent. It is not supported by our homogeneous TTV sample, including 10 ground-based EXPANSION light curves obtained in 2018 simultaneously with TESS. Even if the TTV trend itself does exist in WASP-4, its magnitude and tidal nature are uncertain. Doppler data cannot entirely rule out the Roemer effect induced by possible distant companions.

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

Journal keyword(s): methods: data analysis - methods: statistical - techniques: photometric - techniques: radial velocities - surveys - planetary systems

Simbad objects: 22

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2021.01.22-13:52:48

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