Observation of the exoplanetary transit for Wasp-2

Игнатов, Владимир; Gorbachev, M. A.; Shlyapnikov, A. A.

doi:10.31059/aat.vol1.iss1.pp13-18

Cited by 2 publications

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“…We assembled 57 complete transit light curves of WASP-2 b, with sufficient quality for a TTV analysis. The open databases have 50 transits, there is one from Addison et al (2019), one from Turner et al (2017), one from Charbonneau et al (2007), one from Ignatov et al (2020), and three from our own observations (T35, ATA50 and T100). 47 of these light curves survived our second stage of the light-curve elimination procedure, forming the TTV diagram with a 14.07 year-baseline.…”

Section: Wasp-2 Systemmentioning

confidence: 93%

Homogeneous transit timing analyses of 10 exoplanet systems

Baştürk

Esmer

Yalçınkaya

et al. 2022

Monthly Notices of the Royal Astronomical Society

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We study the transit timings of 10 exoplanets in order to investigate potential Transit Timing Variations (TTVs) in them. We model their available ground-based light curves, some presented here and others taken from the literature, and homogeneously measure the mid-transit times. We statistically compare our results with published values and find that the measurement errors agree. However, in terms of recovering the possible frequencies, homogeneous sets can be found to be more useful, of which no statistically relevant example has been found for the planets in our study. We corrected the ephemeris information of all ten planets we studied and provide these most precise light elements as references for future transit observations with space-borne and ground-based instruments. We found no evidence for secular or periodic changes in the orbital periods of the planets in our sample, including the ultra-short period WASP-103 b, whose orbit is expected to decay on an observable timescale. Therefore, we derive the lower limits for the reduced tidal quality factors (Q$^{\prime }_{\star }$) for the host stars based on best fitting quadratic functions to their timing data. We also present a global model of all available data for WASP-74 b, which has a Gaia parallax-based distance value ∼25 per cent larger than the published value.

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Section: Wasp-2 Systemmentioning

confidence: 93%

Homogeneous transit timing analyses of 10 exoplanet systems

Baştürk

Esmer

Yalçınkaya

et al. 2022

Monthly Notices of the Royal Astronomical Society

View full text Add to dashboard Cite

show abstract

Homogeneous Transit Timing Analyses of Ten Exoplanet Systems

Baştürk,

Esmer,

Yalçınkaya

et al. 2022

Preprint

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We study the transit timings of 10 exoplanets in order to investigate potential Transit Timing Variations (TTVs) in them. We model their available ground-based light curves, some presented here and others taken from the literature, and homogeneously measure the mid-transit times. We statistically compare our results with published values and find that the measurement errors agree. However, in terms of recovering the possible frequencies, homogeneous sets can be found to be more useful, of which no statistically relevant example has been found for the planets in our study. We corrected the ephemeris information of all ten planets we studied and provide these most precise light elements as references for future transit observations with space-borne and ground-based instruments. We found no evidence for secular or periodic changes in the orbital periods of the planets in our sample, including the ultra-short period WASP-103 b, whose orbit is expected to decay on an observable timescale. Therefore, we derive the lower limits for the reduced tidal quality factors (Q 1 ‹ ) for the host stars based on best fitting quadratic functions to their timing data. We also present a global model of all available data for WASP-74 b, which has a Gaia parallax-based distance value "25% larger than the published value.

show abstract

Observation of the exoplanetary transit for Wasp-2

Cited by 2 publications

References 0 publications

Homogeneous transit timing analyses of 10 exoplanet systems

Homogeneous transit timing analyses of 10 exoplanet systems

Homogeneous Transit Timing Analyses of Ten Exoplanet Systems

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