III/281 Gaia FGK benchmark stars v2.1 (Jofre+, 2018) ================================================================================ Gaia FGK benchmark stars v2.1. Jofre P., Heiter U., Soubiran C., Tucci Maia M., Worley C., Hawkins K., Blanco-Cuaresma S., Rodrigo C. =2018yCat.3281....0J =2018RNAAS...2..152J ================================================================================ ADC_Keywords: Spectroscopy ; Stars, standard ; Abundances, [Fe/H] ; Fundamental catalog Keywords: stars: fundamental parameters - techniques: spectroscopic - standards Abstract: In this era of large spectroscopic surveys of stars of the Milky Way, pipelines need to be tested and validated against a set of well-known stars. The Gaia FGK benchmark stars (GBS) are among the preferred samples of reference stars. They consist of a small but carefully selected sample of stars whose parameters are derived consistently and homogeneously. A series of papers has been published that discuss the definition and evolution of the sample of GBS. Here we summarise this work and provide our current list of stars with associated parameters which are recommended for validation and calibration purposes for stellar surveys. Description: Updated stellar parameters of the Gaia FGK benchmark stars (GBS). File Summary: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- ReadMe 80 . This file gbs.dat 350 36 Stellar parameters of the GBS stars -------------------------------------------------------------------------------- See also: J/A+A/564/A133 : Gaia FGK benchmark stars: metallicity (Jofre+, 2014) J/A+A/566/A98 : The Gaia Benchmark Stars - Library (Blanco-Cuaresma+, 2014) J/A+A/582/A81 : Gaia FGK benchmark stars: abundances (Jofre+, 2015) J/A+A/592/A70 : Gaia FGK stars: low-metallicities candidates (Hawkins+, 2016) Byte-by-byte Description of file: gbs.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 9 A9 ---- StarID1 Star name 11- 18 A8 ---- StarID2 ?=-99 HD number (HDNNNNNN) (III/135) 20- 28 A9 ---- StarID3 ?=-99 HIP number (HIPNNNNNN) (I/239) 30- 48 I19 ---- StarID4 ?=-99 Gaia DR2 Source ID (I/345) 50- 51 I2 h RAh ? Right ascension (J2000) 53- 54 I2 min RAm ? Right ascension (J2000) 56- 61 F6.3 s RAs ? Rigth ascension (J2000) 63 A1 ---- DE- Declination sign (J2000) 64- 65 I2 deg DEd ? Declination (J2000) 67- 68 I2 arcmin DEm ? Declination (J2000) 70- 74 F5.2 arcsec DEs ? Declination (J2000) 76- 90 A15 ---- SpType ?=-99 MK spectral type 92- 95 I4 K Teff ?=9999 Effective temperature (1) 97- 99 I3 K e_Teff ?=999 Uncertainty of effective temperature 101-104 F4.2 [cm/s2] logg ?=9.99 Surface gravity (2) 106-109 F4.2 [cm/s2] e_logg ?=9.99 Uncertainty of surface gravity 111-115 F5.2 [Sun] [Fe/H] Iron abundance relative to the Sun (3) 117-120 F4.2 [Sun] e_[Fe/H] Uncertainty of [Fe/H] 122-125 F4.2 [-] logeps(Mg) ?=9.99 Abundance of magnesium (4) 127-130 F4.2 [-] e_logeps(Mg) ?=9.99 Uncertainty of magnesium 132-135 F4.2 [-] logeps(Si) ?=9.99 Abundance of silicon 137-140 F4.2 [-] e_logeps(Si) ?=9.99 Uncertainty of silicon 142-145 F4.2 [-] logeps(Ca) ?=9.99 Abundance of calcium 147-150 F4.2 [-] e_logeps(Ca) ?=9.99 Uncertainty of calcium 152-155 F4.2 [-] logeps(Ti) ?=9.99 Abundance of titanium 157-160 F4.2 [-] e_logeps(Ti) ?=9.99 Uncertainty of titanium 162-165 F4.2 [-] logeps(Sc) ?=9.99 Abundance of scandium 167-170 F4.2 [-] e_logeps(Sc) ?=9.99 Uncertainty of scandium 172-175 F4.2 [-] logeps(V) ?=9.99 Abundance of vanadium 177-180 F4.2 [-] e_logeps(V) ?=9.99 Uncertainty of vanadium 182-185 F4.2 [-] logeps(Cr) ?=9.99 Abundance of chromium 187-190 F4.2 [-] e_logeps(Cr) ?=9.99 Uncertainty of chromium 192-195 F4.2 [-] logeps(Mn) ?=9.99 Abundance of manganese 197-200 F4.2 [-] e_logeps(Mn) ?=9.99 Uncertainty of manganese 202-205 F4.2 [-] logeps(Co) ?=9.99 Abundance of cobalt 207-210 F4.2 [-] e_logeps(Co) ?=9.99 Uncertainty of cobalt 212-215 F4.2 [-] logeps(Ni) ?=9.99 Abundance of nickel 217-220 F4.2 [-] e_logeps(Ni) ?=9.99 Uncertainty of nickel 222-227 F6.3 [Sun] [Mg/H] ?=9.999 Magnesium relative to the Sun (5) 229-233 F5.3 [Sun] e_[Mg/H] ?=9.999 Uncertainty of [Mg/H] 235-240 F6.3 [Sun] [Si/H] ?=9.999 Silicon relative to the Sun 242-246 F5.3 [Sun] e_[Si/H] ?=9.999 Uncertainty of [Si/H] 248-253 F6.3 [Sun] [Ca/H] ?=9.999 Calcium relative to the Sun 255-259 F5.3 [Sun] e_[Ca/H] ?=9.999 Uncertainty of [Ca/H] 261-266 F6.3 [Sun] [Ti/H] ?=9.999 Titanium relative to the Sun 268-272 F5.3 [Sun] e_[Ti/H] ?=9.999 Uncertainty of [Ti/H] 274-279 F6.3 [Sun] [Sc/H] ?=9.999 Scandium relative to the Sun 281-285 F5.3 [Sun] e_[Sc/H] ?=9.999 Uncertainty of [Sc/H] 287-292 F6.3 [Sun] [V/H] ?=9.999 Vanadium relative to the Sun 294-298 F5.3 [Sun] e_[V/H] ?=9.999 Uncertainty of [V/H] 300-305 F6.3 [Sun] [Cr/H] ?=9.999 Chromium relative to the Sun 307-311 F5.3 [Sun] e_[Cr/H] ?=9.999 Uncertainty of [Cr/H] 313-318 F6.3 [Sun] [Mn/H] ?=9.999 Manganese relative to the Sun 320-324 F5.3 [Sun] e_[Mn/H] ?=9.999 Uncertainty of [Mn/H] 326-331 F6.3 [Sun] [Co/H] ?=9.999 Cobalt relative to the Sun 333-337 F5.3 [Sun] e_[Co/H] ?=9.999 Uncertainty of [Co/H] 339-344 F6.3 [Sun] [Ni/H] ?=9.999 Nickel relative to the Sun 346-350 F5.3 [Sun] e_[Ni/H] ?=9.999 Uncertainty of [Ni/H] -------------------------------------------------------------------------------- Note (1): When the stellar parameter or chemical abundance were not determined it was set to -99. From Table 10 of Heiter et al. (2015A&A...582A..49H). The Teff of HD102200, HD106038, HD175305, HD201891 and HD298986 are from Table 3 of Hawkins et al. (2016A&A...592A..70H). Note (2): From Table 10 of Heiter et al. (2015A&A...582A..49H). The logg of HD102200, HD106038, HD175305, HD201891 and HD298986 are from Table 3 of Hawkins et al. (2016A&A...592A..70H). Note (3): From Table 3 of Jofre et al. 2014 (A&A,564, 133). For HD102200, HD106038, HD175305, HD201891 and HD298986 the uncertainties of [Fe/H] were calculated by quadratically summing all sigma and Delta columns in Table 5 of Hawkins et al. (2016A&A...592A..70H). Note (4): logeps = logarithm of number abundance relative to hydrogen + 12. From Jofre et al. (2015A&A...582A..81J). Note (5): [X/H] = logarithm of number abundance relative to the Sun. From Table A1 to A10 of Jofre et al. (2015A&A...582A..81J). -------------------------------------------------------------------------------- Acknowledgements: Marcelo Tucci Maia, marcelo.tucci(at)mail.udp.cl Paula Jofre, paula.jofre(at)mail.udp.cl Nucleo de Astronomia, Universidad Diego Portales References: Heiter et al., Paper I 2015A&A...582A..49H Blanco-Cuaresma et al., Paper II 2014A&A...566A..98B, Cat. J/A+A/566/A98 Jofre et al., Paper III 2014A&A...564A.133J, Cat. J/A+A/564/A133 Jofre et al., Paper IV 2015A&A...582A..81J, Cat. J/A+A/582/A81 Hawkins et al., Paper V 2016A&A...592A..70H, Cat. J/A+A/592/A70 Jofre et al., 2017A&A...601A..38J ================================================================================ (End) Paula Jofre [Nucleo de Astronomia], Patricia Vannier [CDS] 20-Aug-2018