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Browsing by Author "Messina, S"

Browsing by Author "Messina, S"

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  • Magnetic activity in the photosphere of CoRoT-Exo-2a. Active longitudes and short-term spot cycle in a young Sun-like star 
    Lanza, A. F; Pagano, I; Leto, G; Messina, S; Aigrain, S; Alonso, R; Auvergne, M; Baglin, A; Barge, P; Bonomo, A. S; Boumier, P; Collier Cameron, A; Comparato, M; Cutispoto, G; de Medeiros, J. R; Foing, B; Kaiser, A; Moutou, C; Parihar, P. S; Silva-Valio, A; Weiss, W. W (EDP Sciences, 2009-01)
    Context: The space experiment CoRoT has recently detected transits by a hot Jupiter across the disc of an active G7V star (CoRoT-Exo-2a) that can be considered as a good proxy for the Sun at an age of approximately 0.5 ...
  • Physical parameters and long-term photometric variability of V1481 Ori, an SB2 member of Orion nebula Cluster with an accreting component 
    Messina, S; Parihar, P. S; Biazzo, K; Lanza, A. F; Distefano, E; Melo, C. H. F; Bradstreet, D. H; Herbst, W (Oxford University Press on behalf of the Royal Astronomical Society, 2016-04)
    We present the results of our analysis on V1481 Ori (JW 239), a young SB2 in the Orion nebula Cluster with a circumbinary disc accreting on the lower mass component. The analysis is based on high-resolution spectroscopic ...
  • The RACE-OC project: Rotation and ACtivity Evolution in Open Clusters 
    Messina, S; Distefano, E; Parihar, P. S; Busa, I; Cutispoto, G; Lanza, A.F; Lanzafame, A; Pagano, I; Biazzo, K; Leto, G; Hatzidimitriou, D; Kim, S. -L; Koo, J. -R; Kang, Y. B (American Institute of Physics, 2009)
    The RACE‐OC project, standing for Rotation and Activity Evolution in Open Clusters, is a long‐term project aimed at studying the evolution of rotation and magnetic activity of late‐type members of stellar open clusters. ...
  • RACE-OC project: rotation and variability in the open cluster M 11 (NGC 6705) 
    Messina, S; Parihar, P. S; Koo, J. R; Kim, S. L; Rey, S. C; Lee, C. U (EDP Sciences, 2010-04)
    Rotation and magnetic activity are intimately linked in main-sequence stars of G or later spectral types. The presence and level of magnetic activity depend on stellar rotation, and rotation itself is strongly influenced ...
  • RACE-OC project: rotation and variability in the open cluster NGC 2099 (M 37) 
    Messina, S; Distefano, E; Parihar, P. S; Kang, Y. B; Kim, S. -L; Rey, S. -C; Lee, C. -U (EDP Sciences, 2008-05)
    Context. Rotation and solar-type magnetic activity are closely related to each other in main-sequence stars of G or later spectral types. The presence and level of magnetic activity depend on star's rotation, and rotation ...
  • Results from a spectroscopic survey in the CoRoT fields. I. Search for chromospherically active stars 
    Medhi, B. J; Messina, S; Parihar, P. S; Pagano, I; Muneer, S; Duorah, K (EDP Sciences, 2007-07)
    Aims.In this paper we report the results of the spectroscopic survey we carried out to detect chromospheric activity of late-type stars in the fields of view of the CoRoT space mission. Methods.We give an accurate MK ...
  • Spectroscopic survey of ASAS eclipsing variables: search for chromospherically active eclipsing binary stars - I 
    Parihar, P. S; Messina, S; Bama, P; Medhi, B. J; Muneer, S; Velu, C; Ahmad, A (Royal Astronomical Society, 2009-05)
    We have started a spectroscopic survey to identify new chromospherically active components and low-mass pre-main sequence (PMS) stars in recently discovered All Sky Automated Survey (ASAS) eclipsing binaries. In this paper, ...
  • An unusual very low-mass high-amplitude pre-main sequence periodic variable 
    Rodríguez-Ledesma, M. V; Mundt, R; Ibrahimov, M; Messina, S; Parihar, P. S; Hessman, F. V; Alves de Oliveira, C; Herbst, W (EDP Sciences, 2012-08)
    Aims. We have investigated the nature of the variability of CHS 7797, an unusual periodic variable in the Orion Nebula Cluster. Methods. An extensive I-band photometric data set of CHS 7797 was compiled between 2004−2010 ...

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