Browsing Articles by Author "Garcia, R. A."

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The asteroseismic potential of Kepler: first results for solar-type stars

Chaplin, W. J.; Appourchaux, T.; Elsworth, Y.; Garcia, R. A.; Houdek, G.; Karoff, C.; Metcalfe, T. S.; Molenda-Zackowicz, J.; Monteiro, M. J. P. F. G.; Thompson, M. J.; Gruberbauer, Michael (American Astronomical Society, 2010-04-20)

We present preliminary asteroseismic results from Kepler on three G-type stars. The observations, made at one-minute cadence during the first 33.5 d of science operations, reveal high signal-to-noise solar-like oscillation ...
The connection between stellar granulation and oscillation as seen by the Kepler mission

Kallinger, T.; De Ridder, J.; Hekker, S.; Mathur, S.; Mosser, B.; Gruberbauer, Michael; Garcia, R. A.; Karoff, C.; Ballot, J. (EDP Sciences, 2014-10)

Context. The long and almost continuous observations by Kepler show clear evidence of a granulation background signal in a large sample of stars, which is interpreted as the surface manifestation of convection. It has been ...
Observations of intensity fluctuations attributed to granulation and faculae on Sun-like stars from the Kepler mission

Gruberbauer, Michael; Karoff, C.; Campante, T. L.; Ballot, J.; Kallinger, T.; Garcia, R. A.; Caldwell, D. A.; Christiansen, J. L.; Kinemuchi, K. (American Astronomical Society, 2013-04-10)

Sun-like stars show intensity fluctuations on a number of timescales due to various physical phenomena on their surfaces. These phenomena can convincingly be studied in the frequency spectra of these stars—while the strongest ...
Oscillation mode frequencies of 61 main sequence and subgiant stars observed by Kepler

Appourchaux, T.; Chaplin, W. J.; Garcia, R. A.; Gruberbauer, Michael; Verner, G. A.; Antia, H. M.; Benomar, O.; Campante, T. L.; Davies, G. R.; Deheuvels, S. (EDP Sciences, 2012)

Context. Solar-like oscillations have been observed by Kepler and CoRoT in several solar-type stars, thereby providing a way to probe the stars using asteroseismology. Aims. We provide the mode frequencies of the oscillations ...
Oscillation mode linewidths of main-sequence and subgiant stars observed by Kepler

Appourchaux, T.; Benomar, O.; Gruberbauer, Michael; Chaplin, W. J.; Garcia, R. A.; Handberg, R.; Verner, G. A.; Antia, H. M.; Campante, T. L.; Davies, G. R. (EDP Sciences, 2012-01)

Context. Solar-like oscillations have been observed by Kepler and CoRoT in several solar-type stars. Aims. We study the variations in the stellar p-mode linewidth as a function of effective temperature. Methods. We study ...