J/MNRAS/525/L43 A super-Earth planet in the WASP-84 system (Maciejewski+, 2023)
A hot super-Earth planet in the WASP-84 planetary system.
Maciejewski G., Golonka J., Loboda W., Ohlert J., Fernandez M., Aceituno F.
<Mon. Not. R. Astron. Soc., 525, L43-L49 (2023)>
=2023MNRAS.525L..43M 2023MNRAS.525L..43M (SIMBAD/NED BibCode)
ADC_Keywords: Stars, double and multiple ; Exoplanets ; Photometry, CCD ;
Optical
Keywords: techniques: photometric - techniques: radial velocities -
planets and satellites: detection -
planets and satellites: formation -
planets and satellites: terrestrial planets -
stars: individual: WASP-84 (BD+02 2056)
Abstract:
Hot Jupiters have been perceived as loners devoid of planetary
companions in close orbital proximity. However, recent discoveries
based on space-borne precise photometry have revealed that at least
some fraction of giant planets coexists with low-mass planets in
compact orbital architectures. We report detecting a 1.446-d
transit-like signal in the photometric time series acquired with the
Transiting Exoplanet Survey Satellite (TESS) for the WASP-84 system,
which is known to contain a hot Jupiter on a circular 8.5-d orbit. The
planet was validated based on TESS photometry, and its signal was
distilled in radial velocity measurements. The joint analysis of
photometric and Doppler data resulted in a multiplanetary model of the
system. With a mass of 15M☉, radius of 2R☉, and
orbital distance of 0.024au, the new planet WASP-84 c was classified
as a hot super-Earth with the equilibrium temperature of 1300K. A
growing number of companions to hot Jupiters indicates that a
non-negligible part of them must have formed under a quiescent
scenario such as disc migration or in situ formation.
Description:
We provide the photometric time series for transits of WASP-84 b
acquired with the ground-based telescopes: the 1.2m Trebur one-meter
telescope (TRE120) at the Michael Adrian Observatory in Trebur
(Germany) and the 0.9m Ritchey-Chretien telescope (OSN090) at the
Sierra Nevada Observatory (Spain). The data were collected from
2016-2018. The details on observations and data processing are given
in the paper.
Objects:
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RA (2000) DE Designation(s)
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08 44 25.70 +01 51 36.1 WASP-84 = BD+02 2056
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
lc.dat 51 855 New ground-based transit light curves
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See also:
J/MNRAS/445/1114 : Transiting planetary system WASP-84 (Anderson+, 2014)
Byte-by-byte Description of file: lc.dat
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Bytes Format Units Label Explanations
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1- 7 A7 --- Name [WASP-84] Target name
9- 20 F12.6 d BJD Barycentric Julian date in Barycentric
Dynamical Time (BJD-2400000.0) (TDB)
22- 29 F8.6 --- Flux Normalized flux
31- 38 F8.6 --- e_Flux Flux error
40- 45 A6 --- Tel Telescope code (OSN090 or TRE120)
47- 51 A5 --- Filt [clear] Filter name
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Acknowledgements:
Gracjan Maciejewski, gmac(at)umk.pl
Institute of Astronomy, Nicolaus Copernicus University, Poland
(End) Gracjan Maciejewski [Copernicus Univ.], Patricia Vannier [CDS] 07-Dec-2023