Spectroscopic parameters for solar-type stars with moderate-to-high rotation: New parameters for ten planet hosts

M. Tsantaki; S. G. Sousa; N. C. Santos; M. Montalto; E. Delgado-Mena; A. Mortier; V. Adibekyan; G. Israelian

doi:10.1051/0004-6361/201424257

Spectroscopic parameters for solar-type stars with moderate-to-high rotation: New parameters for ten planet hosts

M. Tsantaki^*, S. G. Sousa, N. C. Santos, M. Montalto, E. Delgado-Mena, A. Mortier, V. Adibekyan, G. Israelian

^*Corresponding author for this work

Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

20 Citations (Scopus)

Abstract

Context. Planetary studies demand precise and accurate stellar parameters as input for inferring the planetary properties. Different methods often provide different results that could lead to biases in the planetary parameters. Aims. In this work, we present a refinement of the spectral synthesis technique designed to treat fast rotating stars better. This method is used to derive precise stellar parameters, namely effective temperature, surface gravity, metallicity, and rotational velocity. The procedure is tested for FGK stars with low and moderate-to-high rotation rates. Methods. The spectroscopic analysis is based on the spectral synthesis package Spectroscopy Made Easy (SME), which assumes Kurucz model atmospheres in LTE. The line list where the synthesis is conducted is comprised of iron lines, and the atomic data are derived after solar calibration. Results. The comparison of our stellar parameters shows good agreement with literature values, both for slowly and for fast rotating stars. In addition, our results are on the same scale as the parameters derived from the iron ionization and excitation method presented in our previous works. We present new atmospheric parameters for 10 transiting planet hosts as an update to the SWEET-Cat catalog. We also re-analyze their transit light curves to derive new updated planetary properties.

Original language	English
Article number	A80
Journal	Astronomy and Astrophysics
Volume	570
DOIs	https://doi.org/10.1051/0004-6361/201424257
Publication status	Published - 1 Oct 2014

Bibliographical note

Funding Information:
This work is supported by the European Research Council/European Community under the FP7 through Starting Grant agreement number 239953. N.C.S. also acknowledges the support from Fundação para a Ciência e a Tecnologia (FCT) through program Ciência 2007 funded by FCT/MCTES (Portugal) and POPH/FSE (EC), and in the form of grant reference PTDC/CTE-AST/098528/2008. S.G.S, E.D.M, and V.Zh.A. acknowledge the support from the Fundação para a Ciência e Tecnologia, FCT (Portugal) in the form of the fellowships SFRH/BPD/47611/2008, SFRH/BPD/76606/2011, and SFRH/BPD/70574/2010. G.I. acknowledges financial support from the Spanish Ministry project MINECO AYA2011-29060. This research made use of the SIMBAD database operated at the CDS, Strasbourg, France, and the Vienna Atomic Line Database operated at Uppsala University, the Institute of Astronomy RAS in Moscow, and the University of Vienna. We thank the authors of SME for making their code public. The Narval observations were conducted under the OPTICON access program. OPTICON has received research funding from the European Community’s Sixth Framework Program under contract number RII3-CT-001566.

Publisher Copyright:
© 2014 ESO.

Keywords

Planets and satellites: fundamental parameters
Stars: fundamental parameters
Techniques: spectroscopic

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

Access to Document

10.1051/0004-6361/201424257

Cite this

@article{31f20608432a41f6bd77851d257d7791,

title = "Spectroscopic parameters for solar-type stars with moderate-to-high rotation: New parameters for ten planet hosts",

abstract = "Context. Planetary studies demand precise and accurate stellar parameters as input for inferring the planetary properties. Different methods often provide different results that could lead to biases in the planetary parameters. Aims. In this work, we present a refinement of the spectral synthesis technique designed to treat fast rotating stars better. This method is used to derive precise stellar parameters, namely effective temperature, surface gravity, metallicity, and rotational velocity. The procedure is tested for FGK stars with low and moderate-to-high rotation rates. Methods. The spectroscopic analysis is based on the spectral synthesis package Spectroscopy Made Easy (SME), which assumes Kurucz model atmospheres in LTE. The line list where the synthesis is conducted is comprised of iron lines, and the atomic data are derived after solar calibration. Results. The comparison of our stellar parameters shows good agreement with literature values, both for slowly and for fast rotating stars. In addition, our results are on the same scale as the parameters derived from the iron ionization and excitation method presented in our previous works. We present new atmospheric parameters for 10 transiting planet hosts as an update to the SWEET-Cat catalog. We also re-analyze their transit light curves to derive new updated planetary properties.",

keywords = "Planets and satellites: fundamental parameters, Stars: fundamental parameters, Techniques: spectroscopic",

author = "M. Tsantaki and Sousa, {S. G.} and Santos, {N. C.} and M. Montalto and E. Delgado-Mena and A. Mortier and V. Adibekyan and G. Israelian",

note = "Funding Information: This work is supported by the European Research Council/European Community under the FP7 through Starting Grant agreement number 239953. N.C.S. also acknowledges the support from Funda{\c c}{\~a}o para a Ci{\^e}ncia e a Tecnologia (FCT) through program Ci{\^e}ncia 2007 funded by FCT/MCTES (Portugal) and POPH/FSE (EC), and in the form of grant reference PTDC/CTE-AST/098528/2008. S.G.S, E.D.M, and V.Zh.A. acknowledge the support from the Funda{\c c}{\~a}o para a Ci{\^e}ncia e Tecnologia, FCT (Portugal) in the form of the fellowships SFRH/BPD/47611/2008, SFRH/BPD/76606/2011, and SFRH/BPD/70574/2010. G.I. acknowledges financial support from the Spanish Ministry project MINECO AYA2011-29060. This research made use of the SIMBAD database operated at the CDS, Strasbourg, France, and the Vienna Atomic Line Database operated at Uppsala University, the Institute of Astronomy RAS in Moscow, and the University of Vienna. We thank the authors of SME for making their code public. The Narval observations were conducted under the OPTICON access program. OPTICON has received research funding from the European Community{\textquoteright}s Sixth Framework Program under contract number RII3-CT-001566. Publisher Copyright: {\textcopyright} 2014 ESO.",

year = "2014",

month = oct,

day = "1",

doi = "10.1051/0004-6361/201424257",

language = "English",

volume = "570",

journal = "Astronomy and Astrophysics",

issn = "0004-6361",

publisher = "EDP Sciences",

}

TY - JOUR

T1 - Spectroscopic parameters for solar-type stars with moderate-to-high rotation

T2 - New parameters for ten planet hosts

AU - Tsantaki, M.

AU - Sousa, S. G.

AU - Santos, N. C.

AU - Montalto, M.

AU - Delgado-Mena, E.

AU - Mortier, A.

AU - Adibekyan, V.

AU - Israelian, G.

N1 - Funding Information: This work is supported by the European Research Council/European Community under the FP7 through Starting Grant agreement number 239953. N.C.S. also acknowledges the support from Fundação para a Ciência e a Tecnologia (FCT) through program Ciência 2007 funded by FCT/MCTES (Portugal) and POPH/FSE (EC), and in the form of grant reference PTDC/CTE-AST/098528/2008. S.G.S, E.D.M, and V.Zh.A. acknowledge the support from the Fundação para a Ciência e Tecnologia, FCT (Portugal) in the form of the fellowships SFRH/BPD/47611/2008, SFRH/BPD/76606/2011, and SFRH/BPD/70574/2010. G.I. acknowledges financial support from the Spanish Ministry project MINECO AYA2011-29060. This research made use of the SIMBAD database operated at the CDS, Strasbourg, France, and the Vienna Atomic Line Database operated at Uppsala University, the Institute of Astronomy RAS in Moscow, and the University of Vienna. We thank the authors of SME for making their code public. The Narval observations were conducted under the OPTICON access program. OPTICON has received research funding from the European Community’s Sixth Framework Program under contract number RII3-CT-001566. Publisher Copyright: © 2014 ESO.

PY - 2014/10/1

Y1 - 2014/10/1

N2 - Context. Planetary studies demand precise and accurate stellar parameters as input for inferring the planetary properties. Different methods often provide different results that could lead to biases in the planetary parameters. Aims. In this work, we present a refinement of the spectral synthesis technique designed to treat fast rotating stars better. This method is used to derive precise stellar parameters, namely effective temperature, surface gravity, metallicity, and rotational velocity. The procedure is tested for FGK stars with low and moderate-to-high rotation rates. Methods. The spectroscopic analysis is based on the spectral synthesis package Spectroscopy Made Easy (SME), which assumes Kurucz model atmospheres in LTE. The line list where the synthesis is conducted is comprised of iron lines, and the atomic data are derived after solar calibration. Results. The comparison of our stellar parameters shows good agreement with literature values, both for slowly and for fast rotating stars. In addition, our results are on the same scale as the parameters derived from the iron ionization and excitation method presented in our previous works. We present new atmospheric parameters for 10 transiting planet hosts as an update to the SWEET-Cat catalog. We also re-analyze their transit light curves to derive new updated planetary properties.

AB - Context. Planetary studies demand precise and accurate stellar parameters as input for inferring the planetary properties. Different methods often provide different results that could lead to biases in the planetary parameters. Aims. In this work, we present a refinement of the spectral synthesis technique designed to treat fast rotating stars better. This method is used to derive precise stellar parameters, namely effective temperature, surface gravity, metallicity, and rotational velocity. The procedure is tested for FGK stars with low and moderate-to-high rotation rates. Methods. The spectroscopic analysis is based on the spectral synthesis package Spectroscopy Made Easy (SME), which assumes Kurucz model atmospheres in LTE. The line list where the synthesis is conducted is comprised of iron lines, and the atomic data are derived after solar calibration. Results. The comparison of our stellar parameters shows good agreement with literature values, both for slowly and for fast rotating stars. In addition, our results are on the same scale as the parameters derived from the iron ionization and excitation method presented in our previous works. We present new atmospheric parameters for 10 transiting planet hosts as an update to the SWEET-Cat catalog. We also re-analyze their transit light curves to derive new updated planetary properties.

KW - Planets and satellites: fundamental parameters

KW - Stars: fundamental parameters

KW - Techniques: spectroscopic

UR - http://www.scopus.com/inward/record.url?scp=84908395265&partnerID=8YFLogxK

U2 - 10.1051/0004-6361/201424257

DO - 10.1051/0004-6361/201424257

M3 - Article

AN - SCOPUS:84908395265

SN - 0004-6361

VL - 570

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

M1 - A80

ER -

Spectroscopic parameters for solar-type stars with moderate-to-high rotation: New parameters for ten planet hosts

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

Access to Document

Fingerprint

Cite this