Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
WASP-4 transit timing variation from a comprehensive set of 129 transits. / Baluev, R. V.; Sokov, E. N.; Hoyer, S.; Huitson, C.; Da Silva, José A.R.S.; Evans, P.; Sokova, I. A.; Knight, C. R.; Shaidulin, V. S.
в: Monthly Notices of the Royal Astronomical Society: Letters, Том 496, № 1, 07.2020, стр. L11-L15.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - WASP-4 transit timing variation from a comprehensive set of 129 transits
AU - Baluev, R. V.
AU - Sokov, E. N.
AU - Hoyer, S.
AU - Huitson, C.
AU - Da Silva, José A.R.S.
AU - Evans, P.
AU - Sokova, I. A.
AU - Knight, C. R.
AU - Shaidulin, V. S.
PY - 2020/7
Y1 - 2020/7
N2 - We homogeneously reanalyse 124 transit light curves for the WASP-4 b hot Jupiter. This set involved new observations secured in 2019 and nearly all observations mentioned in the literature, including high-accuracy GEMINI/GMOS transmission spectroscopy of 2011-2014 and TESS observations of 2018. The analysis confirmed a non-linear transit timing variation (TTV) trend with $P/|dot{P}|sim hbox{17-30}$ Myr (1σ range), implying only half of the initial decay rate estimation. The trend significance is at least 3.4σ in the aggressively conservative treatment. Possible radial acceleration due to unseen companions is not revealed in Doppler data covering seven years 2007-2014, and radial acceleration of -15 m s-1 yr-1 reported in a recent preprint by another team is not confirmed. If present, it is a very non-linear radial velocity variation. Assuming that the entire TTV is tidal in nature, the tidal quality factor $Q-star {prime }sim hbox{(4.5-8.5)}times 104$ does not reveal a convincing disagreement with available theory predictions.
AB - We homogeneously reanalyse 124 transit light curves for the WASP-4 b hot Jupiter. This set involved new observations secured in 2019 and nearly all observations mentioned in the literature, including high-accuracy GEMINI/GMOS transmission spectroscopy of 2011-2014 and TESS observations of 2018. The analysis confirmed a non-linear transit timing variation (TTV) trend with $P/|dot{P}|sim hbox{17-30}$ Myr (1σ range), implying only half of the initial decay rate estimation. The trend significance is at least 3.4σ in the aggressively conservative treatment. Possible radial acceleration due to unseen companions is not revealed in Doppler data covering seven years 2007-2014, and radial acceleration of -15 m s-1 yr-1 reported in a recent preprint by another team is not confirmed. If present, it is a very non-linear radial velocity variation. Assuming that the entire TTV is tidal in nature, the tidal quality factor $Q-star {prime }sim hbox{(4.5-8.5)}times 104$ does not reveal a convincing disagreement with available theory predictions.
KW - methods: data analysis
KW - planetary systems
KW - stars: individual: WASP-4
KW - techniques: photometric
KW - SYSTEM
KW - PARAMETERS
KW - EXOPLANETS
KW - PLANET SEARCH
KW - RADIAL-VELOCITY
KW - stars: individual
KW - WASP-4
KW - JITTER
KW - ANALYSIS TOOL
UR - http://www.scopus.com/inward/record.url?scp=85087033585&partnerID=8YFLogxK
U2 - 10.1093/mnrasl/slaa069
DO - 10.1093/mnrasl/slaa069
M3 - Article
AN - SCOPUS:85087033585
VL - 496
SP - L11-L15
JO - Monthly Notices of the Royal Astronomical Society
JF - Monthly Notices of the Royal Astronomical Society
SN - 0035-8711
IS - 1
ER -
ID: 60573249