Search for transiting exoplanets and variable stars in the open cluster NGC 7243

Garai, Z.; Pribulla, T.; Hambálek, Ľ.; Errmann, R.; Adam, Ch.; Buder, Sven; Butterley, T.; Dhillon, V. S.; Dinçel, B.; Gilbert, H.; Ginski, C.; Hardy, L. K.; Kellerer, Aglae; Kitze, M.; Kundra, E.; Littlefair, S. P.; Mugrauer, M.; Nedoroščík, J.; Neuhäuser, R.; Pannicke, A.; Raetz, Stefanie; Schmidt, J.; Schmidt, T. O. B.; Seeliger, Martin; Vaňko, M.; Wilson, Richard W.

doi:10.1002/asna.201512310

Cited by 27 publications

(7 citation statements)

References 67 publications

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“…We used the data obtained by this survey to search for general periodic variation in the young open cluster IC 348. For an overview on the current state of YETI we refer the reader to the recent work of Garai et al (2016).…”

Section: Introductionmentioning

confidence: 99%

Long-term photometry of IC 348 with the Young Exoplanet Transit Initiative network

Fritzewski

Kitze

Mugrauer

et al. 2016

Mon. Not. R. Astron. Soc.

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We present long-term photometric observations of the young open cluster IC 348 with a baseline time-scale of 2.4 yr. Our study was conducted with several telescopes from the Young Exoplanet Transit Initiative (YETI) network in the Bessel R band to find periodic variability of young stars. We identified 87 stars in IC 348 to be periodically variable; 33 of them were unreported before. Additionally, we detected 61 periodic non-members of which 41 are new discoveries. Our wide field of view was the key to those numerous newly found variable stars. The distribution of rotation periods in IC 348 has always been of special interest. We investigate it further with our newly detected periods but we cannot find a statistically significant bimodality. We also report the detection of a close eclipsing binary in IC 348 composed of a low-mass stellar component (M 0.09 M ) and a K0 pre-main sequence star (M ≈ 2.7 M ). Furthermore, we discovered three detached binaries among the background stars in our field of view and confirmed the period of a fourth one.

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Section: Introductionmentioning

confidence: 99%

Long-term photometry of IC 348 with the Young Exoplanet Transit Initiative network

Fritzewski

Kitze

Mugrauer

et al. 2016

Mon. Not. R. Astron. Soc.

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“…• Transiting planet candidates Several transiting candidates were already identified in the YETI data. For the first candidate (Errmann et al, 2014) all follow-ups are already done, while the other candidates needs further investigations (Garai et al, 2016;Fritzewski et al, 2016). High-resolution imaging Pawe l Zieliński, et al…”

Section: Results Overviewmentioning

confidence: 99%

Search for young transiting exoplanets within YETI project

Zieliński,

Janík,

Neuhäuser

et al. 2018

Preprint

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The Young Exoplanet Transit Initiative (YETI) is a project focused on the photometric monitoring of stellar open clusters in order to find new young transiting exoplanets, eclipsing binaries and study other variability phenomena. Here, we present the status of the initiative and plans for future photometric campaigns of three open clusters younger than 50 Myr: NGC 869, NGC 884 and IC 4665, by using the world-wide one meter-class telescope network. Based on the experience gained by several astronomical observatories included in this network, dedicated numerical algorithms and recent results obtained during the first observing campaigns, we expect to confirm several young transiting objects: low-mass stars, brown dwarfs and exoplanets. The photometric precision given for a typical telescope used in this project, allows for transit detection of Jupiter-size planets at close-in orbits with periods up to ∼ 30 days and also hundreds of new various variable stars. pta.edu.pl/proc/2018nov20/123

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“…The YETI (Young Exoplanet Transit Initiative) project conducts searches for transiting exoplanets in a number of young open clusters. The detection rate is lower than expected, which may be due to an intrinsic stellar variability or the true paucity of such exoplanets (Neuhäuser et al 2011;Errmann et al 2014;Garai et al 2016;Fritzewski et al 2016). The theoretical study of Bonnell et al (2001) indicates that while planetary formation is heavily suppressed in the crowded environment of the globular clusters, less crowded systems such as open clusters should have a reduced effect on any planetary system.…”

Section: Introductionmentioning

confidence: 91%

Spatial distribution of exoplanet candidates based on Kepler and Gaia data

Maliuk

Budaj

2020

A&A

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Context. Surveying the spatial distribution of exoplanets in the Galaxy is important for improving our understanding of planet formation and evolution. Aims. We aim to determine the spatial gradients of exoplanet occurrence in the Solar neighbourhood and in the vicinity of open clusters. Methods. We combined Kepler and Gaia DR2 data for this purpose, splitting the volume sampled by the Kepler mission into certain spatial bins. We determined an uncorrected and bias-corrected exoplanet frequency and metallicity for each bin.Results. There is a clear drop in the uncorrected exoplanet frequency with distance for F-type stars (mainly for smaller planets), a decline with increasing distance along the Galactic longitude l = 90 • , and a drop with height above the Galactic plane. We find that the metallicity behaviour cannot be the reason for the drop of the exoplanet frequency around F stars with increasing distance. This might have only contributed to the drop in uncorrected exoplanet frequency with the height above the Galactic plane. We argue that the above-mentioned gradients of uncorrected exoplanet frequency are a manifestation of a single bias of undetected smaller planets around fainter stars. When we correct for observational biases, most of these gradients in exoplanet frequency become statistically insignificant. Only a slight decline of the planet occurrence with distance for F stars remains significant at the 3σ level. Apart from that, the spatial distribution of exoplanets in the Kepler field of view is compatible with a homogeneous one. At the same time, we do not find a significant change in the exoplanet frequency with increasing distance from open clusters. In terms of byproducts, we identified six exoplanet host star candidates that are members of open clusters. Four of them are in the NGC 6811 (KIC 9655005, KIC 9533489, Kepler-66, Kepler-67) and two belong to NGC 6866 (KIC 8396288, KIC 8331612). Two out of the six had already been known to be cluster members.

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Search for transiting exoplanets and variable stars in the open cluster NGC 7243

Cited by 27 publications

References 67 publications

Long-term photometry of IC 348 with the Young Exoplanet Transit Initiative network

Long-term photometry of IC 348 with the Young Exoplanet Transit Initiative network

Search for young transiting exoplanets within YETI project

Spatial distribution of exoplanet candidates based on Kepler and Gaia data

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