Homogeneous spectroscopic parameters for bright planet host stars from the northern hemisphere: The impact on stellar and planetary mass

S. G. Sousa; N. C. Santos; A. Mortier; M. Tsantaki; V. Adibekyan; E. Delgado Mena; G. Israelian; B. Rojas-Ayala; V. Neves

doi:10.1051/0004-6361/201425227

Homogeneous spectroscopic parameters for bright planet host stars from the northern hemisphere: The impact on stellar and planetary mass

S. G. Sousa, N. C. Santos, A. Mortier, M. Tsantaki, V. Adibekyan, E. Delgado Mena, G. Israelian, B. Rojas-Ayala, V. Neves

Physics and Astronomy

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

31 Citations (Scopus)

Abstract

Aims. In this work we derive new precise and homogeneous parameters for 37 stars with planets. For this purpose, we analyze high resolution spectra obtained by the NARVAL spectrograph for a sample composed of bright planet host stars in the northern hemisphere. The new parameters are included in the SWEET-Cat online catalogue. Methods. To ensure that the catalogue is homogeneous, we use our standard spectroscopic analysis procedure, ARES+MOOG, to derive effective temperatures, surface gravities, and metallicities. These spectroscopic stellar parameters are then used as input to compute the stellar mass and radius, which are fundamental for the derivation of the planetary mass and radius. Results. We show that the spectroscopic parameters, masses, and radii are generally in good agreement with the values available in online databases of exoplanets. There are some exceptions, especially for the evolved stars. These are analyzed in detail focusing on the effect of the stellar mass on the derived planetary mass. Conclusions. We conclude that the stellar mass estimations for giant stars should be managed with extreme caution when using them to compute the planetary masses. We report examples within this sample where the differences in planetary mass can be as high as 100% in the most extreme cases.

Original language	English
Article number	A94
Journal	Astronomy and Astrophysics
Volume	576
DOIs	https://doi.org/10.1051/0004-6361/201425227
Publication status	Published - 1 Apr 2015

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. was supported by FCT through the Investigador FCT contract reference IF/00169/2012 and POPH/FSE (EC) by FEDER funding through the program Programa Operacional de Factores de Competitividade – COMPETE. S.G.S, E.D.M, and V.Zh.A. acknowledge the support from the Fundação para a Ciência e Tecnologia, FCT (Portugal) and POPH/FSE (EC), in the form of the fellowships SFRH/BPD/47611/2008, SFRH/BPD/76606/2011, and SFRH/BPD/70574/2010. A.M. acknowledges support from the European Union Seventh Framework Programme (FP7/2007-2013) under grant agreement number 313014 (ETAEARTH). G.I. acknowledges financial support from the Spanish Ministry project MINECO AYA2011-29060. V.N. acknowledges a CNPq/BJT Post-Doctorate fellowship 301186/2014-6 and partial financial support of the INCT INEspaço. This research has made use of the SIMBAD database operated at CDS, Strasbourg, France. The authors acknowledge support from OPTICON (EU-FP7 Grant number 312430).

Publisher Copyright:
© ESO, 2015.

Keywords

Catalogs
Planetary systems
Stars: abundances
Stars: solar-type

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.1051/0004-6361/201425227

Cite this

@article{9e50a05f51d54f1484578ed0f731e253,

title = "Homogeneous spectroscopic parameters for bright planet host stars from the northern hemisphere: The impact on stellar and planetary mass",

abstract = "Aims. In this work we derive new precise and homogeneous parameters for 37 stars with planets. For this purpose, we analyze high resolution spectra obtained by the NARVAL spectrograph for a sample composed of bright planet host stars in the northern hemisphere. The new parameters are included in the SWEET-Cat online catalogue. Methods. To ensure that the catalogue is homogeneous, we use our standard spectroscopic analysis procedure, ARES+MOOG, to derive effective temperatures, surface gravities, and metallicities. These spectroscopic stellar parameters are then used as input to compute the stellar mass and radius, which are fundamental for the derivation of the planetary mass and radius. Results. We show that the spectroscopic parameters, masses, and radii are generally in good agreement with the values available in online databases of exoplanets. There are some exceptions, especially for the evolved stars. These are analyzed in detail focusing on the effect of the stellar mass on the derived planetary mass. Conclusions. We conclude that the stellar mass estimations for giant stars should be managed with extreme caution when using them to compute the planetary masses. We report examples within this sample where the differences in planetary mass can be as high as 100% in the most extreme cases.",

keywords = "Catalogs, Planetary systems, Stars: abundances, Stars: solar-type",

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

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. was supported by FCT through the Investigador FCT contract reference IF/00169/2012 and POPH/FSE (EC) by FEDER funding through the program Programa Operacional de Factores de Competitividade – COMPETE. 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) and POPH/FSE (EC), in the form of the fellowships SFRH/BPD/47611/2008, SFRH/BPD/76606/2011, and SFRH/BPD/70574/2010. A.M. acknowledges support from the European Union Seventh Framework Programme (FP7/2007-2013) under grant agreement number 313014 (ETAEARTH). G.I. acknowledges financial support from the Spanish Ministry project MINECO AYA2011-29060. V.N. acknowledges a CNPq/BJT Post-Doctorate fellowship 301186/2014-6 and partial financial support of the INCT INEspa{\c c}o. This research has made use of the SIMBAD database operated at CDS, Strasbourg, France. The authors acknowledge support from OPTICON (EU-FP7 Grant number 312430). Publisher Copyright: {\textcopyright} ESO, 2015.",

year = "2015",

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doi = "10.1051/0004-6361/201425227",

language = "English",

volume = "576",

journal = "Astronomy and Astrophysics",

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TY - JOUR

T1 - Homogeneous spectroscopic parameters for bright planet host stars from the northern hemisphere

T2 - The impact on stellar and planetary mass

AU - Sousa, S. G.

AU - Santos, N. C.

AU - Mortier, A.

AU - Tsantaki, M.

AU - Adibekyan, V.

AU - Delgado Mena, E.

AU - Israelian, G.

AU - Rojas-Ayala, B.

AU - Neves, V.

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. was supported by FCT through the Investigador FCT contract reference IF/00169/2012 and POPH/FSE (EC) by FEDER funding through the program Programa Operacional de Factores de Competitividade – COMPETE. S.G.S, E.D.M, and V.Zh.A. acknowledge the support from the Fundação para a Ciência e Tecnologia, FCT (Portugal) and POPH/FSE (EC), in the form of the fellowships SFRH/BPD/47611/2008, SFRH/BPD/76606/2011, and SFRH/BPD/70574/2010. A.M. acknowledges support from the European Union Seventh Framework Programme (FP7/2007-2013) under grant agreement number 313014 (ETAEARTH). G.I. acknowledges financial support from the Spanish Ministry project MINECO AYA2011-29060. V.N. acknowledges a CNPq/BJT Post-Doctorate fellowship 301186/2014-6 and partial financial support of the INCT INEspaço. This research has made use of the SIMBAD database operated at CDS, Strasbourg, France. The authors acknowledge support from OPTICON (EU-FP7 Grant number 312430). Publisher Copyright: © ESO, 2015.

PY - 2015/4/1

Y1 - 2015/4/1

N2 - Aims. In this work we derive new precise and homogeneous parameters for 37 stars with planets. For this purpose, we analyze high resolution spectra obtained by the NARVAL spectrograph for a sample composed of bright planet host stars in the northern hemisphere. The new parameters are included in the SWEET-Cat online catalogue. Methods. To ensure that the catalogue is homogeneous, we use our standard spectroscopic analysis procedure, ARES+MOOG, to derive effective temperatures, surface gravities, and metallicities. These spectroscopic stellar parameters are then used as input to compute the stellar mass and radius, which are fundamental for the derivation of the planetary mass and radius. Results. We show that the spectroscopic parameters, masses, and radii are generally in good agreement with the values available in online databases of exoplanets. There are some exceptions, especially for the evolved stars. These are analyzed in detail focusing on the effect of the stellar mass on the derived planetary mass. Conclusions. We conclude that the stellar mass estimations for giant stars should be managed with extreme caution when using them to compute the planetary masses. We report examples within this sample where the differences in planetary mass can be as high as 100% in the most extreme cases.

AB - Aims. In this work we derive new precise and homogeneous parameters for 37 stars with planets. For this purpose, we analyze high resolution spectra obtained by the NARVAL spectrograph for a sample composed of bright planet host stars in the northern hemisphere. The new parameters are included in the SWEET-Cat online catalogue. Methods. To ensure that the catalogue is homogeneous, we use our standard spectroscopic analysis procedure, ARES+MOOG, to derive effective temperatures, surface gravities, and metallicities. These spectroscopic stellar parameters are then used as input to compute the stellar mass and radius, which are fundamental for the derivation of the planetary mass and radius. Results. We show that the spectroscopic parameters, masses, and radii are generally in good agreement with the values available in online databases of exoplanets. There are some exceptions, especially for the evolved stars. These are analyzed in detail focusing on the effect of the stellar mass on the derived planetary mass. Conclusions. We conclude that the stellar mass estimations for giant stars should be managed with extreme caution when using them to compute the planetary masses. We report examples within this sample where the differences in planetary mass can be as high as 100% in the most extreme cases.

KW - Catalogs

KW - Planetary systems

KW - Stars: abundances

KW - Stars: solar-type

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U2 - 10.1051/0004-6361/201425227

DO - 10.1051/0004-6361/201425227

M3 - Article

AN - SCOPUS:84926618648

SN - 0004-6361

VL - 576

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

M1 - A94

ER -

Homogeneous spectroscopic parameters for bright planet host stars from the northern hemisphere: The impact on stellar and planetary mass

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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