Accurate p-mode measurements of the G0V metal-rich CoRoT*target HD 52265

J. Ballot, Laurent Gizon, R. Samadi, G. Vauclair, Othman Benomar, H. Bruntt, B. Mosser, T. Stahn, G. A. Verner, T. L. Campante, R. A. García, S. Mathur, D. Salabert, P. Gaulme, C. Régulo, I. W. Roxburgh, T. Appourchaux, F. Baudin, C. Catala, W. J. Chaplin & 10 others S. Deheuvels, E. Michel, Michael Bazot, O. Creevey, N. Dolez, Y. Elsworth, K. H. Sato, S. Vauclair, M. Auvergne, A. Baglin

    Research output: Contribution to journalArticle

    Abstract

    Context. 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: Teff = 6100 ± 60 K, logg = 4.35 ± 0.09, [M/H] = 0.19 ± 0.05, as well as \vsini=3.6+0.3-1.0\kms}. We have measured a mean rotation period Prot = 12.3 ± 0.15 days, and find a signature of differential rotation. The frequencies of 31 modes are reported in the range 1500-2550 μHz. The large separation exhibits a clear modulation around the mean value \hbox{$\Dnu=98.3\,\pm\,0. 1∼muHz$}. 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 maxim al bolometric amplitude of about 3.96 ± 0.24 ppm for radial modes.

    Original languageEnglish (US)
    Article numberA97
    JournalAstronomy and Astrophysics
    Volume530
    DOIs
    StatePublished - May 23 2011

    Fingerprint

    metal
    oscillation
    metals
    stars
    seismology
    signatures
    seismic data
    solar oscillations
    spectroscopy
    software
    extrasolar planets
    spectrographs
    time measurement
    parameter
    telescopes
    computer programs
    modulation
    life (durability)
    oscillations
    profiles

    Keywords

    • asteroseismology
    • stars: fundamental parameters
    • stars: individual: HD 52265
    • stars: rotation
    • stars: solar-type

    ASJC Scopus subject areas

    • Astronomy and Astrophysics
    • Space and Planetary Science

    Cite this

    Ballot, J., Gizon, L., Samadi, R., Vauclair, G., Benomar, O., Bruntt, H., ... Baglin, A. (2011). Accurate p-mode measurements of the G0V metal-rich CoRoT*target HD 52265. Astronomy and Astrophysics, 530, [A97]. https://doi.org/10.1051/0004-6361/201116547

    Accurate p-mode measurements of the G0V metal-rich CoRoT*target HD 52265. / Ballot, J.; Gizon, Laurent; Samadi, R.; Vauclair, G.; Benomar, Othman; Bruntt, H.; Mosser, B.; Stahn, T.; Verner, G. A.; Campante, T. L.; García, R. A.; Mathur, S.; Salabert, D.; Gaulme, P.; Régulo, C.; Roxburgh, I. W.; Appourchaux, T.; Baudin, F.; Catala, C.; Chaplin, W. J.; Deheuvels, S.; Michel, E.; Bazot, Michael; Creevey, O.; Dolez, N.; Elsworth, Y.; Sato, K. H.; Vauclair, S.; Auvergne, M.; Baglin, A.

    In: Astronomy and Astrophysics, Vol. 530, A97, 23.05.2011.

    Research output: Contribution to journalArticle

    Ballot, J, Gizon, L, Samadi, R, Vauclair, G, Benomar, O, Bruntt, H, Mosser, B, Stahn, T, Verner, GA, Campante, TL, García, RA, Mathur, S, Salabert, D, Gaulme, P, Régulo, C, Roxburgh, IW, Appourchaux, T, Baudin, F, Catala, C, Chaplin, WJ, Deheuvels, S, Michel, E, Bazot, M, Creevey, O, Dolez, N, Elsworth, Y, Sato, KH, Vauclair, S, Auvergne, M & Baglin, A 2011, 'Accurate p-mode measurements of the G0V metal-rich CoRoT*target HD 52265', Astronomy and Astrophysics, vol. 530, A97. https://doi.org/10.1051/0004-6361/201116547
    Ballot J, Gizon L, Samadi R, Vauclair G, Benomar O, Bruntt H et al. Accurate p-mode measurements of the G0V metal-rich CoRoT*target HD 52265. Astronomy and Astrophysics. 2011 May 23;530. A97. https://doi.org/10.1051/0004-6361/201116547
    Ballot, J. ; Gizon, Laurent ; Samadi, R. ; Vauclair, G. ; Benomar, Othman ; Bruntt, H. ; Mosser, B. ; Stahn, T. ; Verner, G. A. ; Campante, T. L. ; García, R. A. ; Mathur, S. ; Salabert, D. ; Gaulme, P. ; Régulo, C. ; Roxburgh, I. W. ; Appourchaux, T. ; Baudin, F. ; Catala, C. ; Chaplin, W. J. ; Deheuvels, S. ; Michel, E. ; Bazot, Michael ; Creevey, O. ; Dolez, N. ; Elsworth, Y. ; Sato, K. H. ; Vauclair, S. ; Auvergne, M. ; Baglin, A. / Accurate p-mode measurements of the G0V metal-rich CoRoT*target HD 52265. In: Astronomy and Astrophysics. 2011 ; Vol. 530.
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    title = "Accurate p-mode measurements of the G0V metal-rich CoRoT*target HD 52265",
    abstract = "Context. 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: Teff = 6100 ± 60 K, logg = 4.35 ± 0.09, [M/H] = 0.19 ± 0.05, as well as \vsini=3.6+0.3-1.0\kms}. We have measured a mean rotation period Prot = 12.3 ± 0.15 days, and find a signature of differential rotation. The frequencies of 31 modes are reported in the range 1500-2550 μHz. The large separation exhibits a clear modulation around the mean value \hbox{$\Dnu=98.3\,\pm\,0. 1∼muHz$}. 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 maxim al bolometric amplitude of about 3.96 ± 0.24 ppm for radial modes.",
    keywords = "asteroseismology, stars: fundamental parameters, stars: individual: HD 52265, stars: rotation, stars: solar-type",
    author = "J. Ballot and Laurent Gizon and R. Samadi and G. Vauclair and Othman Benomar and H. Bruntt and B. Mosser and T. Stahn and Verner, {G. A.} and Campante, {T. L.} and Garc{\'i}a, {R. A.} and S. Mathur and D. Salabert and P. Gaulme and C. R{\'e}gulo and Roxburgh, {I. W.} and T. Appourchaux and F. Baudin and C. Catala and Chaplin, {W. J.} and S. Deheuvels and E. Michel and Michael Bazot and O. Creevey and N. Dolez and Y. Elsworth and Sato, {K. H.} and S. Vauclair and M. Auvergne and A. Baglin",
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    TY - JOUR

    T1 - Accurate p-mode measurements of the G0V metal-rich CoRoT*target HD 52265

    AU - Ballot, J.

    AU - Gizon, Laurent

    AU - Samadi, R.

    AU - Vauclair, G.

    AU - Benomar, Othman

    AU - Bruntt, H.

    AU - Mosser, B.

    AU - Stahn, T.

    AU - Verner, G. A.

    AU - Campante, T. L.

    AU - García, R. A.

    AU - Mathur, S.

    AU - Salabert, D.

    AU - Gaulme, P.

    AU - Régulo, C.

    AU - Roxburgh, I. W.

    AU - Appourchaux, T.

    AU - Baudin, F.

    AU - Catala, C.

    AU - Chaplin, W. J.

    AU - Deheuvels, S.

    AU - Michel, E.

    AU - Bazot, Michael

    AU - Creevey, O.

    AU - Dolez, N.

    AU - Elsworth, Y.

    AU - Sato, K. H.

    AU - Vauclair, S.

    AU - Auvergne, M.

    AU - Baglin, A.

    PY - 2011/5/23

    Y1 - 2011/5/23

    N2 - Context. 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: Teff = 6100 ± 60 K, logg = 4.35 ± 0.09, [M/H] = 0.19 ± 0.05, as well as \vsini=3.6+0.3-1.0\kms}. We have measured a mean rotation period Prot = 12.3 ± 0.15 days, and find a signature of differential rotation. The frequencies of 31 modes are reported in the range 1500-2550 μHz. The large separation exhibits a clear modulation around the mean value \hbox{$\Dnu=98.3\,\pm\,0. 1∼muHz$}. 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 maxim al bolometric amplitude of about 3.96 ± 0.24 ppm for radial modes.

    AB - Context. 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: Teff = 6100 ± 60 K, logg = 4.35 ± 0.09, [M/H] = 0.19 ± 0.05, as well as \vsini=3.6+0.3-1.0\kms}. We have measured a mean rotation period Prot = 12.3 ± 0.15 days, and find a signature of differential rotation. The frequencies of 31 modes are reported in the range 1500-2550 μHz. The large separation exhibits a clear modulation around the mean value \hbox{$\Dnu=98.3\,\pm\,0. 1∼muHz$}. 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 maxim al bolometric amplitude of about 3.96 ± 0.24 ppm for radial modes.

    KW - asteroseismology

    KW - stars: fundamental parameters

    KW - stars: individual: HD 52265

    KW - stars: rotation

    KW - stars: solar-type

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