J/A+A/574/A124 Spectroscopy of solar twins and analogues (Datson+, 2015)
Spectroscopic study of solar twins and analogues.
Datson J., Flynn C., Portinari L.
<Astron. Astrophys. 574, A124 (2015)>
=2015A&A...574A.124D 2015A&A...574A.124D
ADC_Keywords: Stars, G-type ; Stars, fundamental ; Spectroscopy ; Abundances ;
Effective temperatures
Keywords: stars: abundances - stars: fundamental parameters - stars: solar-type
Abstract:
Many large stellar surveys have been and are still being carried out,
providing huge amounts of data, for which stellar physical parameters
will be derived. Solar twins and analogues provide a means to test the
calibration of these stellar catalogues because the Sun is the
best-studied star and provides precise fundamental parameters. Solar
twins should be centred on the solar values.
This spectroscopic study of solar analogues selected from the
Geneva-Copenhagen Survey (GCS) at a resolution of 48000 provides
effective temperatures and metallicities for these stars. We test
whether our spectroscopic parameters, as well as the previous
photometric calibrations, are properly centred on the Sun. In
addition, we search for more solar twins in our sample.
The methods used in this work are based on literature methods for
solar twin searches and on methods we developed in previous work to
distinguish the metallicity-temperature degeneracies in the
differential comparison of spectra of solar analogues versus a
reference solar reflection spectrum.
Description:
Table 1 lists the stellar parameters determined in the paper.
Table 5 lists the spectral lines of the four line lists used in the
publication, sorted by element.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 30 148 List of effective temperatures, metallicities
and gravities
table5.dat 21 446 List of spectral lines used in the four line
lists, sorted by element
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See also:
J/A+A/410/527 : Abundances in the Galactic disk (Bensby+, 2003)
J/A+A/487/373 : Spectroscopic parameters of 451 HARPS-GTO stars (Sousa+, 2008)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 2 A2 --- --- [HD]
3- 8 I6 --- HD HD number of the star
9 A1 --- n_HD [*] indicates a solar twin
11- 14 A4 --- Sample FE12 or FE14
16- 19 I4 K Teff [5345/6146] Effective temperature
21- 25 F5.2 [Sun] [Fe/H] [-0.52/0.32] Metallicity
27- 30 F4.2 [cm/s2] logg [3.8/4.9] Surface gravity
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 5 A5 --- Ion Element and ionization stage (I ir II)
7- 13 F7.2 0.1nm lambda Central wavelength λ(Å)
15 A1 --- Ra09 [x] Listed in Ramirez et al.,
2009arXiv0911.1893R 2009arXiv0911.1893R (x for yes)
17 A1 --- Bi12 [x] Listed in Biazzo et al.,
2012MNRAS.427.2905B 2012MNRAS.427.2905B (x for yes)
19 A1 --- Be03 [x] Listed in Bensby et al.,
2003, Cat. J/A+A/410/527 (x for yes)
21 A1 --- So08 [x] Listed in Sousa et al.,
2008, Cat. J/A+A/487/373 (x for yes)
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Acknowledgements:
Juliet Datson, juliet.datson(at)googlemail.com
(End) Juliet Datson [Tuorla Observatory], Patricia Vannier [CDS] 29-Dec-2014