Magnetic activity in the photosphere of CoRoT-Exo-2a. Active longitudes and short-term spot cycle in

@article{Lanza2008MagneticAI,
  title={Magnetic activity in the photosphere of CoRoT-Exo-2a. Active longitudes and short-term spot cycle in},
  author={Antonino Francesco Lanza and Isabella Pagano and Giuseppe Leto and Sergio Messina and Suzanne Aigrain and Roi Alonso and Michel Auvergne and Annie Baglin and Pierre Barge and Aldo Stefano Bonomo and Patrick Boumier and Andrew Collier Cameron and M. Comparato and Giuseppe Cutispoto and J. R. De Medeiros and Bernard H. Foing and Alexander Kaiser and Claire Moutou and Padmakar Singh Parihar and A. V. R. Silva and Werner W. Weiss},
  journal={Astronomy and Astrophysics},
  year={2008}
}
Context. The space experiment CoRoT has recently detected transits by a hot Jupiter across the disk of an active G7V star (CoRoTExo-2a) that can be considered as a good proxy for the Sun at an age of approximately 0.5 Gyr. Aims. We present a spot modelling of the optical variability of the star during 142 days of uninterrupted observations performed by CoRoT with unprecedented photometric precision. Methods. We apply spot modelling approaches previously tested in the case of the Sun by… 

Figures and Tables from this paper

Magnetic activity of the star Corot-Exo-2a

Continuous photometric observations of the young active solar-type star Corot-Exo-2a using the “Corot” space telescope obtained over 142 days were used to analyze the star’s surface temperature

Photospheric activity and rotation of the planet-hosting star CoRoT-4a

Aims. The space experiment CoRoT has recently detected a transiting hot Jupiter in orbit around a moderately active F-type main-sequence star (CoRoT-4a). This planetary system is of particular

CoRoT-2a Magnetic Activity: Hints for Possible Star–Planet Interaction

CoRoT-2a is a young (≈0.5 Gyr) G7V star accompanied by a transiting hot-Jupiter, discovered by the CoRoT satellite (Alonso et al. Astron Astrophys 482:L21, 2008; Bouchy et al. Astron Astrophys

Photospheric activity, rotation, and radial velocity variations of the planet-hosting star CoRoT-7

Context. The CoRoT satellite has recently discovered the transits of an Earth-like planet across the disc of a late-type magnetically active star dubbed CoRoT-7, while a second planet was detected

Photospheric activity, rotation, and star-planet interaction of the planet-hosting star CoRoT-6

Context. The CoRoT satellite has recently discovered a hot Jupiter that transits across the disc of a F9 main-sequence star called CoRoT-6 with a period of 8.886 days. Aims. We model the photospheric

Current state of the modelling of photospheric activity

I briefly review the current state of the modelling of photospheric activity based on the high-precision optical light curves obtained with MOST, CoRoT, and Kepler. These models can be used to search

From CoRoT 102899501 to the Sun A time evolution model of chromospheric activity on the main sequence

Aims. The present study reports measurements of the rotation period of a young solar analogue, estimates of its surface coverage by photospheric starspots and of its chromospheric activity level, and

Time evolution and rotation of starspots on CoRoT-2 from the modelling of transit photometry

CoRoT-2, the second planet-hosting star discovered by the CoRoT satellite, is a young and active star. A total of 77 transits were observed for this system over a period of 135 days. Small

Photospheric activity, rotation, and magnetic interaction in LHS 6343 A

Context. The Kepler mission has recently discovered a brown dwarf companion transiting one member of the M4V+M5V visual binary system LHS 6343 AB with an orbital period of 12.71 days. Aims. The

Short-lived spots in solar-like stars as observed by CoRoT

Context. CoRoT light curves have an unprecedented photometric quality, having simultaneously a high signal-to-noise ratio, a long time span and a nearly continuous duty-cycle. Aims. We analyse the
...

References

SHOWING 1-10 OF 43 REFERENCES

Multiband modelling of the Sun as a variable star from VIRGO/SoHO data

The time series of total solar irradiance (TSI) and optical spectral irradiance at 402, 500 and 862 nm (SSIs) obtained by the VIRGO experiment on board the satellite SoHO are analysed in order to

Comparing different approaches to model the rotational modulation of the Sun as a star

Context. The space missions MOST, COROT and Kepler are going to provide us with high-precision optical photometry of solar-like stars with time series extending from tens of days to several years.

Transiting exoplanets from the CoRoT space mission. II. CoRoT-Exo-2b: a transiting planet around an

Context. The CoRoT mission, a pioneer in exoplanet searches from space, has completed its first 150 days of continuous observations of ∼12 000 stars in the galactic plane. An analysis of the raw data

Contribution of Sun-like faculae to the light-curve modulation of young active dwarfs

Aims. The time variability of the broadband solar irradiance depends not only on the intrinsic evolution and visibility modulation of sunspots but also on that of faculae that become brighter near

Discovery of Solar Rieger Periodicities in Another Star

The Rieger periods are solar cycles with a time scale of months, which are present in both flaring activity and sunspot occurrence. These short-term periodicities, tentatively explained by

Modelling the rotational modulation of the Sun as a star

We analyse the time variability of the total solar irradiance (TSI) as measured by VIRGO/SoHO in order to model the variability of the Sun as a star. Apart from the phases near the minimum at the

Doppler imaging of stellar surface structure. XXII. Time-series mapping of the young rapid rotator LQ Hydrae

We reconstruct a time series of 28 surface temperature maps (Doppler-images) of the spotted single K2-dwarf LQ Hya from 35 consecutive stellar rotations in Nov.–Dec. 1996. Two more maps are obtained

The Very Low Albedo of an Extrasolar Planet: MOST Space-based Photometry of HD 209458

Measuring the albedo of an extrasolar planet provides insight into its atmospheric composition and its global thermal properties, including heat dissipation and weather patterns. Such a measurement

Photometric Light Curves and Polarization of Close-in Extrasolar Giant Planets

The close-in extrasolar giant planets (CEGPs), ≲0.05 AU from their parent stars, may have a large component of optically reflected light. We present theoretical optical photometric light curves and

Hot Jupiters and stellar magnetic activity

Context. Recent observations suggest that stellar magnetic activity may be influenced by the presence of a close-by giant planet. Specifically, chromospheric hot spots rotating in phase with the