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Exploring pre-main sequence variables of ONC: The new variables
Padmakar Parihar, Sergio Messina, Elisa Distefano +2
Since 2004, we have been engaged in a long-term observing program to monitor young stellar objects in the Orion Nebula Cluster. We have collected about two thousands frames in V, R…
CoRoT-2a magnetic activity: hints for possible star-planet interaction
Isabella Pagano, Antonino F. Lanza, Giuseppe Leto +3
CoRoT-2a is a young (about 0.5 Gyr) G7V star accompanied by a transiting hot-Jupiter, discovered by the CoRoT satellite (Alonso et al. 2008; Bouchy et al. 2008). An analysis of its…
Multiple and changing cycles of active stars II. Results
K. Oláh, Z. Kolláth, T. Granzer +8
We study the time variations of the cycles of 20 active stars based on decades-long photometric or spectroscopic observations. A method of time-frequency analysis, as discussed in…
A deep multi-band investigation of IC2391
L. Spezzi, I. Pagano, G. Marino +8
We report the outcome of a deep multi-wavelength study of the IC2391 young open cluster. We aim at uncovering new low-mass and sub-stellar members of the cluster and identifying ne…
Photospheric activity and rotation of the planet-hosting star CoRoT-Exo-4a
A. F. Lanza, S. Aigrain, S. Messina +12
The space experiment CoRoT has recently detected a transiting hot Jupiter in orbit around a moderately active F-type main-sequence star (CoRoT-Exo-4a). This planetary system is of…