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. ChaplinS. 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, 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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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.",
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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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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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