Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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. Sh.; Sokova, I. A.; Nielsen, L. D.; Benni, P.; Schneiter, E. M.; D'Angelo, C. Villarreal; 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, Yu; Rusov, S.; Ibrahimov, M. A.; Karimov, R. G.
в: Monthly Notices of the Royal Astronomical Society, Том 490, № 1, 11.2019, стр. 1294-1312.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Homogeneously derived transit timings for 17 exoplanets and reassessed TTV trends for WASP-12 and WASP-4
AU - Baluev, R. V.
AU - Sokov, E. N.
AU - Jones, H. R. A.
AU - Shaidulin, V. Sh.
AU - Sokova, I. A.
AU - Nielsen, L. D.
AU - Benni, P.
AU - Schneiter, E. M.
AU - D'Angelo, C. Villarreal
AU - Fernandez-Lajus, E.
AU - Di Sisto, R. P.
AU - Basturk, O.
AU - Bretton, M.
AU - Wunsche, A.
AU - Hentunen, V-P
AU - Shadick, S.
AU - Jongen, Y.
AU - Kang, W.
AU - Kim, T.
AU - Pakstiene, E.
AU - Qvam, J. K. T.
AU - Knight, C. R.
AU - Guerra, P.
AU - Marchini, A.
AU - Salvaggio, F.
AU - Papini, R.
AU - Evans, P.
AU - Salisbury, M.
AU - Garcia, F.
AU - Molina, D.
AU - Garlitz, J.
AU - Esseiva, N.
AU - Ogmen, Y.
AU - Karavaev, Yu
AU - Rusov, S.
AU - Ibrahimov, M. A.
AU - Karimov, R. G.
PY - 2019/11
Y1 - 2019/11
N2 - We homogeneously analyse ∼3.2 × 10 5 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 nonlinear 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.
AB - We homogeneously analyse ∼3.2 × 10 5 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 nonlinear 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.
KW - methods: data analysis
KW - methods: statistical
KW - techniques: photometric
KW - techniques: radial velocities
KW - surveys
KW - planetary systems
KW - HIGH-PRECISION PHOTOMETRY
KW - LIMB-DARKENING COEFFICIENTS
KW - STELLAR ATMOSPHERE MODELS
KW - LIGHT-CURVE PROJECT
KW - PLANETARY SYSTEM
KW - RADIAL-VELOCITY
KW - HOT JUPITER
KW - TRANSMISSION SPECTRUM
KW - PHYSICAL-PROPERTIES
KW - IMPROVED PARAMETERS
KW - Techniques: radial velocities
KW - Surveys
KW - Techniques: photometric
KW - Methods: statistical
KW - Methods: data analysis
KW - Planetary systems
UR - http://www.scopus.com/inward/record.url?scp=85075252535&partnerID=8YFLogxK
UR - http://www.mendeley.com/research/homogeneously-derived-transit-timings-17-exoplanets-reassessed-ttv-trends-wasp12-wasp4
U2 - 10.1093/mnras/stz2620
DO - 10.1093/mnras/stz2620
M3 - статья
VL - 490
SP - 1294
EP - 1312
JO - Monthly Notices of the Royal Astronomical Society
JF - Monthly Notices of the Royal Astronomical Society
SN - 0035-8711
IS - 1
ER -
ID: 49241004