Cleaning WASP-33 b transits from the host star photometric variability: analysis of TESS data from two sectors

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Cleaning WASP-33 b transits from the host star photometric variability: analysis of TESS data from two sectors. / Baluev, Roman V.; Sokov, Eugene N.

In: Monthly Notices of the Royal Astronomical Society, Vol. 537, No. 1, 01.02.2025, p. 171-184.

Research output: Contribution to journal › Article › peer-review

BibTeX

@article{915b2387ae9d49288d9ddcdbadc52fd7,

title = "Cleaning WASP-33 b transits from the host star photometric variability: analysis of TESS data from two sectors",

abstract = "Based on TESS observations of a δ Scuti variable WASP-33 obtained in 2019 and 2022, we thoroughly investigate the power spectrum of this target photometric flux and construct a statistically exhaustive model for its variability. This model contains 30 robustly justified harmonics detected in both the TESS sectors simultaneously, 13 less robust harmonics detected in a single TESS sector, a red noise, and a quasi-periodic noise term. This allowed us to greatly improve the accuracy of the exoplanet WASP-33 b transit timings, reducing the TTV residuals r.m.s. drastically, by a factor of 3.5, from 63 to 18 s. Finally, our analysis does not confirm existence of a detectable orbital phase variation claimed previously based on WASP-33 TESS photometry of 2019.",

keywords = "planets and satellites: detection, stars: individual: WASP-33, stars: variables: Scuti, techniques: photometric",

author = "Baluev, {Roman V.} and Sokov, {Eugene N.}",

year = "2025",

month = feb,

day = "1",

doi = "10.1093/mnras/staf011",

language = "English",

volume = "537",

pages = "171--184",

journal = "Monthly Notices of the Royal Astronomical Society",

issn = "0035-8711",

publisher = "Wiley-Blackwell",

number = "1",

}

RIS

TY - JOUR

T1 - Cleaning WASP-33 b transits from the host star photometric variability: analysis of TESS data from two sectors

AU - Baluev, Roman V.

AU - Sokov, Eugene N.

PY - 2025/2/1

Y1 - 2025/2/1

N2 - Based on TESS observations of a δ Scuti variable WASP-33 obtained in 2019 and 2022, we thoroughly investigate the power spectrum of this target photometric flux and construct a statistically exhaustive model for its variability. This model contains 30 robustly justified harmonics detected in both the TESS sectors simultaneously, 13 less robust harmonics detected in a single TESS sector, a red noise, and a quasi-periodic noise term. This allowed us to greatly improve the accuracy of the exoplanet WASP-33 b transit timings, reducing the TTV residuals r.m.s. drastically, by a factor of 3.5, from 63 to 18 s. Finally, our analysis does not confirm existence of a detectable orbital phase variation claimed previously based on WASP-33 TESS photometry of 2019.

AB - Based on TESS observations of a δ Scuti variable WASP-33 obtained in 2019 and 2022, we thoroughly investigate the power spectrum of this target photometric flux and construct a statistically exhaustive model for its variability. This model contains 30 robustly justified harmonics detected in both the TESS sectors simultaneously, 13 less robust harmonics detected in a single TESS sector, a red noise, and a quasi-periodic noise term. This allowed us to greatly improve the accuracy of the exoplanet WASP-33 b transit timings, reducing the TTV residuals r.m.s. drastically, by a factor of 3.5, from 63 to 18 s. Finally, our analysis does not confirm existence of a detectable orbital phase variation claimed previously based on WASP-33 TESS photometry of 2019.

KW - planets and satellites: detection

KW - stars: individual: WASP-33

KW - stars: variables: Scuti

KW - techniques: photometric

UR - https://www.mendeley.com/catalogue/2ed7e902-cfbf-3910-bd07-94fb320e46a6/

U2 - 10.1093/mnras/staf011

DO - 10.1093/mnras/staf011

M3 - Article

VL - 537

SP - 171

EP - 184

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

SN - 0035-8711

IS - 1

ER -

ID: 128685023