ExoClock Project. II. A Large-scale Integrated Study with 180 Updated Exoplanet Ephemerides

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F22%3A00571808" target="_blank" >RIV/61389021:_____/22:00571808 - isvavai.cz</a>

Result on the web

<a href="https://arxiv.org/pdf/2110.13863.pdf" target="_blank" >https://arxiv.org/pdf/2110.13863.pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3847/1538-4365/ac3a10" target="_blank" >10.3847/1538-4365/ac3a10</a>

Result language

angličtina

Original language name

ExoClock Project. II. A Large-scale Integrated Study with 180 Updated Exoplanet Ephemerides

Original language description

The ExoClock project is an inclusive, integrated, and interactive platform that was developed to monitor the ephemerides of the Ariel targets to increase the mission efficiency. The project makes the best use of all available resources, i.e., observations from ground telescopes, midtime values from the literature, and finally, observations from space instruments. Currently, the ExoClock network includes 280 participants with telescopes capable of observing 85% of the currently known Ariel candidate targets. This work includes the results of similar to 1600 observations obtained up to 2020 December 31 from the ExoClock network. These data in combination with similar to 2350 midtime values collected from the literature are used to update the ephemerides of 180 planets. The analysis shows that 40% of the updated ephemerides will have an impact on future scheduling as either they have a significantly improved precision or they have revealed biases in the old ephemerides. With the new observations, the observing coverage and rate for half of the planets in the sample has been doubled or more. Finally, from a population perspective, we identify that the differences in the 2028 predictions between the old and the new ephemerides have an STD that is double what is expected from Gaussian uncertainties. These findings have implications for planning future observations, where we will need to account for drifts potentially greater than the prediction uncertainties. The updated ephemerides are open and accessible to the wider exoplanet community both from our Open Science Framework repository and our website.

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10308 - Astronomy (including astrophysics,space science)

Project

<a href="/en/project/EF16_026%2F0008390" target="_blank" >EF16_026/0008390: Partnership for excellence in superprecise optics</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2022

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Astrophysical Journal Supplement Series

ISSN

0067-0049

e-ISSN

1538-4365

Volume of the periodical

258

Issue of the periodical within the volume

2

Country of publishing house

GB - UNITED KINGDOM

Number of pages

47

Pages from-to

40

UT code for WoS article

000753167800001

EID of the result in the Scopus database

2-s2.0-85125866218