The HERMES solar atlas and the spectroscopic analysis of the seismic solar analogue KIC 3241581

Context. Solar-analogue stars provide an excellent resource to study the Sun’s evolution, i.e. the changes with time in stellar structure, activity, or rotation for solar-like stars. The unparalleled photometric data from the NASA space telescope Kepler allows us to study and characterise solar-like...

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Principais autores:	Beck, P. G., Prieto, C. Allende, van Reeth, T., Tkachenko, A., Raskin, G., van Winckel, H., Nascimento Júnior, José Dias do, Salabert, D., Corsaro, E., García, R. A.
Formato:	article
Idioma:	pt_BR
Publicado em:	EDP Sciences
Assuntos:	Stars - solar type Stars - fundamental parameters Methods - observational Techniques - spectroscopic
Endereço do item:	https://repositorio.ufrn.br/jspui/handle/123456789/29049
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id	ri-123456789-29049
record_format	dspace
institution	Repositório Institucional
collection	RI - UFRN
language	pt_BR
topic	Stars - solar type Stars - fundamental parameters Methods - observational Techniques - spectroscopic
spellingShingle	Stars - solar type Stars - fundamental parameters Methods - observational Techniques - spectroscopic Beck, P. G. Prieto, C. Allende van Reeth, T. Tkachenko, A. Raskin, G. van Winckel, H. Nascimento Júnior, José Dias do Salabert, D. Corsaro, E. García, R. A. The HERMES solar atlas and the spectroscopic analysis of the seismic solar analogue KIC 3241581
description	Context. Solar-analogue stars provide an excellent resource to study the Sun’s evolution, i.e. the changes with time in stellar structure, activity, or rotation for solar-like stars. The unparalleled photometric data from the NASA space telescope Kepler allows us to study and characterise solar-like stars through asteroseismology. Aims. We aim to spectroscopically investigate the fundamental parameter and chromospheric activity of solar analogues and twins, based on observations obtained with the HERMES spectrograph and combine them with asteroseismology. Therefore, we need to build a solar atlas for the spectrograph, to provide accurate calibrations of the spectroscopically determined abundances of solar- and late-type stars observed with this instrument and thus perform differential spectroscopic comparisons. Methods. We acquire high-resolution and high signal-to-noise (S/N) spectroscopy to construct three solar reference spectra by observing the reflected light of the asteroids Vesta and Victoria and the jovian moon Europa (100 <∼ S/N <∼ 450) with the HERMES spectrograph. We then observe the Kepler solar analogue KIC3241581 (S/N ∼ 170). For this star, the fundamental spectral parameters are extracted using a differential analysis. Sufficient S/N in the near ultraviolet allows us to investigate the chromospheric magnetic activity in both objects. Results. We constructed three solar spectrum atlases from 385 to 900 nm, obtained with the HERMES spectrograph from observations of two bright asteroids and a jovian moon. A comparison between our solar spectra atlas to the Kurucz and HARPS solar spectrum shows an excellent agreement. KIC3241581 was found to be a long-periodic binary system. The fundamental parameter for the stellar primary component are Teff = 5689 ± 11 K, log g = 4.385 ± 0.005, [Fe/H] = +0.22 ± 0.01, being in agreement with the published global seismic values, which confirms its status as solar analogue. The chromospheric activity level is compatible with the solar magnetic activity observed during 2014 and 2015. Conclusions. Our solar atlas is an essential tool for the analysis of solar-like stars and to characterise solar analogues and twins with HERMES. The differential analysis, using the presented solar atlas from HERMES observations allows us to obtain the fundamental parameters with very high accuracy. KIC 3241581 is a metal-rich solar analogue with a solar-like activity level in a binary system of unknown period
format	article
author	Beck, P. G. Prieto, C. Allende van Reeth, T. Tkachenko, A. Raskin, G. van Winckel, H. Nascimento Júnior, José Dias do Salabert, D. Corsaro, E. García, R. A.
author_facet	Beck, P. G. Prieto, C. Allende van Reeth, T. Tkachenko, A. Raskin, G. van Winckel, H. Nascimento Júnior, José Dias do Salabert, D. Corsaro, E. García, R. A.
author_sort	Beck, P. G.
title	The HERMES solar atlas and the spectroscopic analysis of the seismic solar analogue KIC 3241581
title_short	The HERMES solar atlas and the spectroscopic analysis of the seismic solar analogue KIC 3241581
title_full	The HERMES solar atlas and the spectroscopic analysis of the seismic solar analogue KIC 3241581
title_fullStr	The HERMES solar atlas and the spectroscopic analysis of the seismic solar analogue KIC 3241581
title_full_unstemmed	The HERMES solar atlas and the spectroscopic analysis of the seismic solar analogue KIC 3241581
title_sort	hermes solar atlas and the spectroscopic analysis of the seismic solar analogue kic 3241581
publisher	EDP Sciences
publishDate	2020
url	https://repositorio.ufrn.br/jspui/handle/123456789/29049
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spelling	ri-123456789-290492020-05-24T09:21:30Z The HERMES solar atlas and the spectroscopic analysis of the seismic solar analogue KIC 3241581 Beck, P. G. Prieto, C. Allende van Reeth, T. Tkachenko, A. Raskin, G. van Winckel, H. Nascimento Júnior, José Dias do Salabert, D. Corsaro, E. García, R. A. Stars - solar type Stars - fundamental parameters Methods - observational Techniques - spectroscopic Context. Solar-analogue stars provide an excellent resource to study the Sun’s evolution, i.e. the changes with time in stellar structure, activity, or rotation for solar-like stars. The unparalleled photometric data from the NASA space telescope Kepler allows us to study and characterise solar-like stars through asteroseismology. Aims. We aim to spectroscopically investigate the fundamental parameter and chromospheric activity of solar analogues and twins, based on observations obtained with the HERMES spectrograph and combine them with asteroseismology. Therefore, we need to build a solar atlas for the spectrograph, to provide accurate calibrations of the spectroscopically determined abundances of solar- and late-type stars observed with this instrument and thus perform differential spectroscopic comparisons. Methods. We acquire high-resolution and high signal-to-noise (S/N) spectroscopy to construct three solar reference spectra by observing the reflected light of the asteroids Vesta and Victoria and the jovian moon Europa (100 <∼ S/N <∼ 450) with the HERMES spectrograph. We then observe the Kepler solar analogue KIC3241581 (S/N ∼ 170). For this star, the fundamental spectral parameters are extracted using a differential analysis. Sufficient S/N in the near ultraviolet allows us to investigate the chromospheric magnetic activity in both objects. Results. We constructed three solar spectrum atlases from 385 to 900 nm, obtained with the HERMES spectrograph from observations of two bright asteroids and a jovian moon. A comparison between our solar spectra atlas to the Kurucz and HARPS solar spectrum shows an excellent agreement. KIC3241581 was found to be a long-periodic binary system. The fundamental parameter for the stellar primary component are Teff = 5689 ± 11 K, log g = 4.385 ± 0.005, [Fe/H] = +0.22 ± 0.01, being in agreement with the published global seismic values, which confirms its status as solar analogue. The chromospheric activity level is compatible with the solar magnetic activity observed during 2014 and 2015. Conclusions. Our solar atlas is an essential tool for the analysis of solar-like stars and to characterise solar analogues and twins with HERMES. The differential analysis, using the presented solar atlas from HERMES observations allows us to obtain the fundamental parameters with very high accuracy. KIC 3241581 is a metal-rich solar analogue with a solar-like activity level in a binary system of unknown period Context. Solar-analogue stars provide an excellent resource to study the Sun’s evolution, i.e. the changes with time in stellar structure, activity, or rotation for solar-like stars. The unparalleled photometric data from the NASA space telescope Kepler allows us to study and characterise solar-like stars through asteroseismology. Aims. We aim to spectroscopically investigate the fundamental parameter and chromospheric activity of solar analogues and twins, based on observations obtained with the HERMES spectrograph and combine them with asteroseismology. Therefore, we need to build a solar atlas for the spectrograph, to provide accurate calibrations of the spectroscopically determined abundances of solar- and late-type stars observed with this instrument and thus perform differential spectroscopic comparisons. Methods. We acquire high-resolution and high signal-to-noise (S/N) spectroscopy to construct three solar reference spectra by observing the reflected light of the asteroids Vesta and Victoria and the jovian moon Europa (100 <∼ S/N <∼ 450) with the HERMES spectrograph. We then observe the Kepler solar analogue KIC3241581 (S/N ∼ 170). For this star, the fundamental spectral parameters are extracted using a differential analysis. Sufficient S/N in the near ultraviolet allows us to investigate the chromospheric magnetic activity in both objects. Results. We constructed three solar spectrum atlases from 385 to 900 nm, obtained with the HERMES spectrograph from observations of two bright asteroids and a jovian moon. A comparison between our solar spectra atlas to the Kurucz and HARPS solar spectrum shows an excellent agreement. KIC3241581 was found to be a long-periodic binary system. The fundamental parameter for the stellar primary component are Teff = 5689 ± 11 K, log g = 4.385 ± 0.005, [Fe/H] = +0.22 ± 0.01, being in agreement with the published global seismic values, which confirms its status as solar analogue. The chromospheric activity level is compatible with the solar magnetic activity observed during 2014 and 2015. Conclusions. Our solar atlas is an essential tool for the analysis of solar-like stars and to characterise solar analogues and twins with HERMES. The differential analysis, using the presented solar atlas from HERMES observations allows us to obtain the fundamental parameters with very high accuracy. KIC 3241581 is a metal-rich solar analogue with a solar-like activity level in a binary system of unknown period 2020-05-21T18:00:50Z 2020-05-21T18:00:50Z 2015-11-18 article BECK, P. G.; PRIETO, C. Allende; VAN REETH, T.; TKACHENKO, A.; RASKIN, G.; VAN WINCKEL, H.; NASCIMENTO JUNIOR, J.D. do; SALABERT, D.; CORSARO, E.; GARCÍA, R. A.. The HERMES solar atlas and the spectroscopic analysis of the seismic solar analogue KIC 3241581. Astronomy & Astrophysics, [s.l.], v. 589, p. A27, 8 abr. 2016. Disponível em: http://dx.doi.org/10.1051/0004-6361/201425423. Acesso em: 14 mai. 2020. 1678-765X 10.1051/0004-6361/201425423 https://repositorio.ufrn.br/jspui/handle/123456789/29049 pt_BR application/pdf EDP Sciences

The HERMES solar atlas and the spectroscopic analysis of the seismic solar analogue KIC 3241581

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