SIMBAD references

2021MNRAS.504L..45B - Mon. Not. R. Astron. Soc., 504, L45-L50 (2021/June-2)

A transit timing variation observed for the long-period extremely low-density exoplanet HIP 41378 f.

BRYANT E.M., BAYLISS D., SANTERNE A., WHEATLEY P.J., NASCIMBENI V., DUCROT E., BURDANOV A., ACTON J.S., ALVES D.R., ANDERSON D.R., ARMSTRONG D.J., AWIPHAN S., COOKE B.F., BURLEIGH M.R., CASEWELL S.L., DELREZ L., DEMORY B.-O., EIGMULLER P., FUKUI A., GAN T., GILL S., GILLON M., GOAD M.R., TAN T.-G., GUNTHER M.N., HARDEE B., HENDERSON B.A., JEHIN E., JENKINS J.S., KOSIAREK M., LENDL M., MOYANO M., MURRAY C.A., NARITA N., NIRAULA P., ODDEN C.E., PALLE E., PARVIAINEN H., PEDERSEN P.P., POZUELOS F.J., RACKHAM B.V., SEBASTIAN D., STOCKDALE C., TILBROOK R.H., THOMPSON S.J., TRIAUD A.H.M.J., UDRY S., VINES J.I., WEST R.G. and DE WIT J.

Abstract (from CDS):

HIP 41378 f is a temperate 9.2 ± 0.1 R⊕ planet with period of 542.08 d and an extremely low density of 0.09 ± 0.02 g cm–3. It transits the bright star HIP 41378 (V = 8.93), making it an exciting target for atmospheric characterization including transmission spectroscopy. HIP 41378 was monitored photometrically between the dates of 2019 November 19 and 28. We detected a transit of HIP 41378 f with NGTS, just the third transit ever detected for this planet, which confirms the orbital period. This is also the first ground-based detection of a transit of HIP 41378 f. Additional ground-based photometry was also obtained and used to constrain the time of the transit. The transit was measured to occur 1.50 h earlier than predicted. We use an analytic transit timing variation (TTV) model to show the observed TTV can be explained by interactions between HIP 41378 e and HIP 41378 f. Using our TTV model, we predict the epochs of future transits of HIP 41378 f, with derived transit centres of T_C, 4_ = 2459355.087+0.031–0.022 (2021 May) and T_C, 5_ = 2459897.078+0.114–0.060 (2022 November).

Abstract Copyright: © 2021 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society

Journal keyword(s): techniques: photometric - planets and satellites: detection - planets and satellites: individual: HIP 41378 f - stars: individual: HIP 41378

Simbad objects: 5

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