Near-infrared spectroscopy of the Sun and HD20010: Compiling a new line list in the near-infrared

D. T. Andreasen, S. G. Sousa, E. Delgado Mena, N. C. Santos, M. Tsantaki, B. Rojas-Ayala, V. Neves

Resultado de la investigación: Article

6 Citas (Scopus)

Resumen

Context. Effective temperature, surface gravity, and metallicity are basic spectroscopic stellar parameters necessary to characterize a star or a planetary system. Reliable atmospheric parameters for FGK stars have been obtained mostly from methods that rely on high resolution and high signal-to-noise optical spectroscopy. The advent of a new generation of high resolution near-infrared (NIR) spectrographs opens the possibility of using classic spectroscopic methods with high resolution and high signal-to-noise in the NIR spectral window. Aims. We compile a new iron line list in the NIR from a solar spectrum to derive precise stellar atmospheric parameters, comparable to the ones already obtained from high resolution optical spectra. The spectral range covers 10 000 Å to 25 000 Å, which is equivalent to the Y,J,H, and K-bands. Methods. Our spectroscopic analysis is based on the iron excitation and ionization balance done in local thermodynamic equilibrium. We use a high resolution and high signal-to-noise ratio spectrum of the Sun from the Kitt Peak telescope as a starting point to compile the iron line list. The oscillator strengths (log gf) of the iron lines were calibrated for the Sun. The abundance analysis was done using the MOOG code after measuring equivalent widths of 357 solar iron lines. Results. We successfully derived stellar atmospheric parameters for the Sun. Furthermore, we analysed HD 20010, a F8IV star, from which we derived stellar atmospheric parameters using the same line list as for the Sun. The spectrum was obtained from the CRIRES-POP database. The results are compatible with the values found in the literature, confirming the reliability of our line list. However, we obtain large errors due to the quality of the data.

Idioma originalEnglish
Número de artículoA143
PublicaciónAstronomy and Astrophysics
Volumen585
DOI
EstadoPublished - 1 ene 2016

Huella dactilar

infrared spectroscopy
lists
near infrared
sun
iron
high resolution
stars
solar spectra
planetary systems
local thermodynamic equilibrium
spectroscopic analysis
extremely high frequencies
oscillator strengths
signal-to-noise ratio
surface temperature
spectrographs
metallicity
optical spectrum
ionization
signal to noise ratios

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Citar esto

Andreasen, D. T., Sousa, S. G., Delgado Mena, E., Santos, N. C., Tsantaki, M., Rojas-Ayala, B., & Neves, V. (2016). Near-infrared spectroscopy of the Sun and HD20010: Compiling a new line list in the near-infrared. Astronomy and Astrophysics, 585, [A143]. https://doi.org/10.1051/0004-6361/201527308
Andreasen, D. T. ; Sousa, S. G. ; Delgado Mena, E. ; Santos, N. C. ; Tsantaki, M. ; Rojas-Ayala, B. ; Neves, V. / Near-infrared spectroscopy of the Sun and HD20010 : Compiling a new line list in the near-infrared. En: Astronomy and Astrophysics. 2016 ; Vol. 585.
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title = "Near-infrared spectroscopy of the Sun and HD20010: Compiling a new line list in the near-infrared",
abstract = "Context. Effective temperature, surface gravity, and metallicity are basic spectroscopic stellar parameters necessary to characterize a star or a planetary system. Reliable atmospheric parameters for FGK stars have been obtained mostly from methods that rely on high resolution and high signal-to-noise optical spectroscopy. The advent of a new generation of high resolution near-infrared (NIR) spectrographs opens the possibility of using classic spectroscopic methods with high resolution and high signal-to-noise in the NIR spectral window. Aims. We compile a new iron line list in the NIR from a solar spectrum to derive precise stellar atmospheric parameters, comparable to the ones already obtained from high resolution optical spectra. The spectral range covers 10 000 {\AA} to 25 000 {\AA}, which is equivalent to the Y,J,H, and K-bands. Methods. Our spectroscopic analysis is based on the iron excitation and ionization balance done in local thermodynamic equilibrium. We use a high resolution and high signal-to-noise ratio spectrum of the Sun from the Kitt Peak telescope as a starting point to compile the iron line list. The oscillator strengths (log gf) of the iron lines were calibrated for the Sun. The abundance analysis was done using the MOOG code after measuring equivalent widths of 357 solar iron lines. Results. We successfully derived stellar atmospheric parameters for the Sun. Furthermore, we analysed HD 20010, a F8IV star, from which we derived stellar atmospheric parameters using the same line list as for the Sun. The spectrum was obtained from the CRIRES-POP database. The results are compatible with the values found in the literature, confirming the reliability of our line list. However, we obtain large errors due to the quality of the data.",
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Andreasen, DT, Sousa, SG, Delgado Mena, E, Santos, NC, Tsantaki, M, Rojas-Ayala, B & Neves, V 2016, 'Near-infrared spectroscopy of the Sun and HD20010: Compiling a new line list in the near-infrared', Astronomy and Astrophysics, vol. 585, A143. https://doi.org/10.1051/0004-6361/201527308

Near-infrared spectroscopy of the Sun and HD20010 : Compiling a new line list in the near-infrared. / Andreasen, D. T.; Sousa, S. G.; Delgado Mena, E.; Santos, N. C.; Tsantaki, M.; Rojas-Ayala, B.; Neves, V.

En: Astronomy and Astrophysics, Vol. 585, A143, 01.01.2016.

Resultado de la investigación: Article

TY - JOUR

T1 - Near-infrared spectroscopy of the Sun and HD20010

T2 - Compiling a new line list in the near-infrared

AU - Andreasen, D. T.

AU - Sousa, S. G.

AU - Delgado Mena, E.

AU - Santos, N. C.

AU - Tsantaki, M.

AU - Rojas-Ayala, B.

AU - Neves, V.

PY - 2016/1/1

Y1 - 2016/1/1

N2 - Context. Effective temperature, surface gravity, and metallicity are basic spectroscopic stellar parameters necessary to characterize a star or a planetary system. Reliable atmospheric parameters for FGK stars have been obtained mostly from methods that rely on high resolution and high signal-to-noise optical spectroscopy. The advent of a new generation of high resolution near-infrared (NIR) spectrographs opens the possibility of using classic spectroscopic methods with high resolution and high signal-to-noise in the NIR spectral window. Aims. We compile a new iron line list in the NIR from a solar spectrum to derive precise stellar atmospheric parameters, comparable to the ones already obtained from high resolution optical spectra. The spectral range covers 10 000 Å to 25 000 Å, which is equivalent to the Y,J,H, and K-bands. Methods. Our spectroscopic analysis is based on the iron excitation and ionization balance done in local thermodynamic equilibrium. We use a high resolution and high signal-to-noise ratio spectrum of the Sun from the Kitt Peak telescope as a starting point to compile the iron line list. The oscillator strengths (log gf) of the iron lines were calibrated for the Sun. The abundance analysis was done using the MOOG code after measuring equivalent widths of 357 solar iron lines. Results. We successfully derived stellar atmospheric parameters for the Sun. Furthermore, we analysed HD 20010, a F8IV star, from which we derived stellar atmospheric parameters using the same line list as for the Sun. The spectrum was obtained from the CRIRES-POP database. The results are compatible with the values found in the literature, confirming the reliability of our line list. However, we obtain large errors due to the quality of the data.

AB - Context. Effective temperature, surface gravity, and metallicity are basic spectroscopic stellar parameters necessary to characterize a star or a planetary system. Reliable atmospheric parameters for FGK stars have been obtained mostly from methods that rely on high resolution and high signal-to-noise optical spectroscopy. The advent of a new generation of high resolution near-infrared (NIR) spectrographs opens the possibility of using classic spectroscopic methods with high resolution and high signal-to-noise in the NIR spectral window. Aims. We compile a new iron line list in the NIR from a solar spectrum to derive precise stellar atmospheric parameters, comparable to the ones already obtained from high resolution optical spectra. The spectral range covers 10 000 Å to 25 000 Å, which is equivalent to the Y,J,H, and K-bands. Methods. Our spectroscopic analysis is based on the iron excitation and ionization balance done in local thermodynamic equilibrium. We use a high resolution and high signal-to-noise ratio spectrum of the Sun from the Kitt Peak telescope as a starting point to compile the iron line list. The oscillator strengths (log gf) of the iron lines were calibrated for the Sun. The abundance analysis was done using the MOOG code after measuring equivalent widths of 357 solar iron lines. Results. We successfully derived stellar atmospheric parameters for the Sun. Furthermore, we analysed HD 20010, a F8IV star, from which we derived stellar atmospheric parameters using the same line list as for the Sun. The spectrum was obtained from the CRIRES-POP database. The results are compatible with the values found in the literature, confirming the reliability of our line list. However, we obtain large errors due to the quality of the data.

KW - stars: fundamental parameters

KW - stars: individual: HD 20010

KW - stars: solar-type

KW - Sun: atmosphere

KW - techniques: spectroscopic

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U2 - 10.1051/0004-6361/201527308

DO - 10.1051/0004-6361/201527308

M3 - Article

AN - SCOPUS:84954502491

VL - 585

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

SN - 0004-6361

M1 - A143

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Andreasen DT, Sousa SG, Delgado Mena E, Santos NC, Tsantaki M, Rojas-Ayala B y otros. Near-infrared spectroscopy of the Sun and HD20010: Compiling a new line list in the near-infrared. Astronomy and Astrophysics. 2016 ene 1;585. A143. https://doi.org/10.1051/0004-6361/201527308