edu.ucar.opensky::articles:10825 UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact 2025-12-26T13:34:58.186561 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) https://n2t.org/ark:/85065/d7ww7j7k Accurate p-mode measurements of the G0V metal-rich CoRoT target HD 52265 2011-06-01T00:00:00Z publication https://n2t.org/ark:/85065/d7ww7j7k https://doi.org/10.1051/0004-6361/201116547 Ballot, J. author Gizon, L. author Samadi, R. author Vauclair, G. author Benomar, O. author Bruntt, H. author Mosser, B. author Stahn, T. author Verner, G. author Campante, T. author Garcia, R. author Mathur, Savita author Salabert, D. author Gaulme, P. author Régulo, C. author Roxburgh, I. author Appourchaux, T. author Baudin, F. author Catala, C. author Chaplin, W. author Deheuvels, S. author Michel, E. author Bazot, M. author Creevey, O. author Dolez, N. author Elsworth, Y. author Sato, K. author Vauclair, S. author Auvergne, M. author Baglin, A. author UCAR/NCAR - Library publisher The star HD 52265 is a G0V metal-rich exoplanet-host star observed in the seismology field of the CoRoT space telescope from November 2008 to March 2009. The satellite collected 117 days of high-precision photometric data on this star, showing that it presents solar-like oscillations. HD 52265 was also observed in spectroscopy with the Narval spectrograph at the same epoch. Aims. We characterise HD 52265 using both spectroscopic and seismic data. Methods. The fundamental stellar parameters of HD 52265 were derived with the semi-automatic software VWA, and the projected rotational velocity was estimated by fitting synthetic profiles to isolated lines in the observed spectrum. The parameters of the observed p modes were determined with a maximum-likelihood estimation. We performed a global fit of the oscillation spectrum, over about ten radial orders, for degrees l = 0 to 2. We also derived the properties of the granulation, and analysed a signature of the rotation induced by the photospheric magnetic activity. Results. Precise determinations of fundamental parameters have been obtained: T(eff) = 6100 ±-60K, log g = 4.35 ±-0.09, [M/H] = 0.19 ±-0.05, as well as v sin i = 3.6(₋₁.₀)(⁺⁰.³) km s(⁻¹). We have measured a mean rotation period P(rot) = 12.3 +/- 0.15 days, and find a signature of differential rotation. The frequencies of 31 modes are reported in the range 1500-2550 mu Hz. The large separation exhibits a clear modulation around the mean value Δv = 98.3 ±-0.1 μHz. Mode widths vary with frequency along an S-shape with a clear local maximum around 1800 μHz. We deduce lifetimes ranging between 0.5 and 3 days for these modes. Finally, we find a maximal bolometric amplitude of about 3.96 ±-0.24 ppm for radial modes. UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact PDF Text theme Resource Type 2016-01-01T00:00:00Z publication An edited version of this paper was published by EDP Sciences. Copyright 2011 European Southern Observatory. None eng geoscientificInformation