Journal
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume 463, Issue 2, Pages 1780-1796Publisher
OXFORD UNIV PRESS
DOI: 10.1093/mnras/stw1932
Keywords
techniques: image processing; techniques: photometric; binaries: general; planetary systems; stars: variables: general; open clusters and associations: individual: NGC 2632 (M 44)
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Funding
- PRIN-INAF
- Universita degli Studi di Padova Progetto di Ateneo [CPDA141214]
- European Union [313014]
- Universita di Padova through the 'Studio preparatorio per il PLATO Input Catalog' grant - ASI-INAF agreement [2877-4/12/15, 2015-019-R.0]
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In this work, we keep pushing K2 data to a high photometric precision, close to that of the Kepler main mission, using a point-spread function (PSF)-based, neighbour-subtraction technique, which also overcome the dilution effects in crowded environments. We analyse the open clusterM44 (NGC 2632), observed during the K2 Campaign 5, and extract light curves of stars imaged on module 14, where most of the cluster lies. We present two candidate exoplanets hosted by cluster members and five by field stars. As a by-product of our investigation, we find 1680 eclipsing binaries and variable stars, 1071 of which are new discoveries. Among them, we report the presence of a heartbeat binary star. Together with this work, we release to the community a catalogue with the variable stars and the candidate exoplanets found, as well as all our raw and detrended light curves.
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