A search for rotation periods in 1000 TESS objects of interest. (arXiv:2007.03079v1 [astro-ph.SR])
<a href="http://arxiv.org/find/astro-ph/1/au:+Martins_B/0/1/0/all/0/1">Bruno L. Canto Martins</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Gomes_R/0/1/0/all/0/1">Roseane L. Gomes</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Messias_Y/0/1/0/all/0/1">Yuri S. Messias</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Lira_S/0/1/0/all/0/1">Suzierly R. de Lira</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Leao_I/0/1/0/all/0/1">Izan C. Leão</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Almeida_L/0/1/0/all/0/1">Leonardo A. Almeida</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Teixeira_M/0/1/0/all/0/1">Márcio A. Teixeira</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Chagas_M/0/1/0/all/0/1">Maria L. das Chagas</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Bravo_J/0/1/0/all/0/1">Jenny P. Bravo</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Belete_A/0/1/0/all/0/1">Asnakew Bewketu Belete</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Medeiros_J/0/1/0/all/0/1">José R. De Medeiros</a>
The high quality light curves from the Transiting Exoplanet Survey Satellite
(TESS) represent a unique laboratory for the study of stellar rotation, a
fundamental observable driving stellar and planetary evolution, including
planetary atmospheres and impacting on habitability conditions and the genesis
of life around stars. As of April 14th 2020, this mission delivered public
light curves for 1000 TESS Objects of Interest (TOIs), observed with 2 minute
cadence during the first 20 months of the mission. Here, we present a search
for rotation signatures in these TOIs, using Fast Fourier Transform,
Lomb-Scargle, and wavelet techniques, accompanied by a rigorous visual
inspection. This effort revealed 163 targets with rotation signatures, 131 of
which present unambiguous rotation periods ranging from 0.321 and 13.219 days,
whereas 32 of them present dubious rotation periodicities. One hundred and nine
of these stars show flux fluctuations whose root-cause is not clearly
identified. For 714 TOIs, the light curves show a noisy behavior, corresponding
to typically low-amplitude signals. Our analysis has also revealed 10 TOI stars
with pulsation periodicities ranging from 0.049 to 2.995 days and four
eclipsing binaries. With upcoming TESS data releases, our periodicity analysis
will be expanded to almost all TOI stars, thereby contributing in defining
criteria for follow-up strategy itself, and the study of star-planet
interactions, surface dynamic of host stars and habitability conditions in
planets, among other aspects. In this context, a living catalog is maintained
on the Filtergraph visualization portal at the URL
https://filtergraph.com/tess_rotation_tois.
The high quality light curves from the Transiting Exoplanet Survey Satellite
(TESS) represent a unique laboratory for the study of stellar rotation, a
fundamental observable driving stellar and planetary evolution, including
planetary atmospheres and impacting on habitability conditions and the genesis
of life around stars. As of April 14th 2020, this mission delivered public
light curves for 1000 TESS Objects of Interest (TOIs), observed with 2 minute
cadence during the first 20 months of the mission. Here, we present a search
for rotation signatures in these TOIs, using Fast Fourier Transform,
Lomb-Scargle, and wavelet techniques, accompanied by a rigorous visual
inspection. This effort revealed 163 targets with rotation signatures, 131 of
which present unambiguous rotation periods ranging from 0.321 and 13.219 days,
whereas 32 of them present dubious rotation periodicities. One hundred and nine
of these stars show flux fluctuations whose root-cause is not clearly
identified. For 714 TOIs, the light curves show a noisy behavior, corresponding
to typically low-amplitude signals. Our analysis has also revealed 10 TOI stars
with pulsation periodicities ranging from 0.049 to 2.995 days and four
eclipsing binaries. With upcoming TESS data releases, our periodicity analysis
will be expanded to almost all TOI stars, thereby contributing in defining
criteria for follow-up strategy itself, and the study of star-planet
interactions, surface dynamic of host stars and habitability conditions in
planets, among other aspects. In this context, a living catalog is maintained
on the Filtergraph visualization portal at the URL
https://filtergraph.com/tess_rotation_tois.
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