J/AJ/154/259 Fundamental parameters of Tycho-2 & TGAS stars (Stevens+, 2017)
Empirical bolometric fluxes and angular diameters of 1.6 million Tycho-2 stars
and radii of 350000 stars with Gaia DR1 parallaxes.
Stevens D.J., Stassun K.G., Gaudi B.S.
<Astron. J., 154, 259-259 (2017)>
=2017AJ....154..259S 2017AJ....154..259S (SIMBAD/NED BibCode)
ADC_Keywords: Photometry, UBV ; Photometry, infrared ; Photometry, uvby ;
Effective temperatures ; Parallaxes, trigonometric ;
Stars, distances ; Stars, diameters ; Abundances, [Fe/H]
Keywords: catalogs - stars: fundamental parameters
Abstract:
We present bolometric fluxes and angular diameters for over 1.6 million
stars in the Tycho-2 catalog (I/259), determined using previously
determined empirical color-temperature and color-flux relations. We
vet these relations via full fits to the full broadband spectral
energy distributions for a subset of benchmark stars and perform
quality checks against the large set of stars for which spectroscopically
determined parameters are available from LAMOST, RAVE, and/or APOGEE.
We then estimate radii for the 355502 Tycho-2 stars in our sample
whose Gaia DR1 (I/337) parallaxes are precise to ~<10%. For these
stars, we achieve effective temperature, bolometric flux, and angular
diameter uncertainties of the order of 1%-2% and radius uncertainties
of order 8%, and we explore the effect that imposing spectroscopic
effective temperature priors has on these uncertainties. These stellar
parameters are shown to be reliable for stars with Teff~<7000 K.
The over half a million bolometric fluxes and angular diameters
presented here will serve as an immediate trove of empirical stellar
radii with the Gaia second data release, at which point effective
temperature uncertainties will dominate the radius uncertainties.
Already, dwarf, subgiant, and giant populations are readily
identifiable in our purely empirical luminosity-effective temperature
(theoretical) Hertzsprung-Russell diagrams.
Description:
We begin with the Tycho-2 catalog (I/259) as our base sample, providing
∼2 million stars with BT and VT magnitudes as well as astrometry that
the Gaia team has used to provide parallaxes in its first data release
(DR1, Cat. I/337). We queried VizieR (Ochsenbein et al. 2000A&AS..143...23O 2000A&AS..143...23O)
for photometry in the U, B, and V bands from Mermilliod (2006, Cat. II/168);
in Stromgren b and y from Paunzen (2015, J/A+A/580/A23); in BT and VT
from the Tycho-2 catalog (Hog et al. 2000, I/259); and in J, H, and KS
from the Two-Micron All Sky Survey (2MASS; Cutri et al. 2003, Cat. II/246;
Skrutskie et al. 2006, Cat. VII/233).
We also queried VizieR for spectroscopically determined effective
temperatures Teff and metallicities to use in our analysis. We began by
searching for matches from the first LAMOST data release catalog (Luo et al.
2015, Cat. V/146), choosing the source with the closest match within 0.1'.
If no LAMOST match was found, we then searched the fourth RAVE data release
catalog (Kordopatis et al. 2013, Cat. III/272). If no RAVE match was found,
we then searched the Apache Point Observatory Galactic Evolution Experiment
(APOGEE) 13th data release (Blanton et al. 2017AJ....154...28B 2017AJ....154...28B) from the
Sloan Digital Sky Survey (SDSS Collaboration et al. 2016, arXiv:1608.02013).
We adopt the parallax measurements from Gaia (Gaia Collaboration 2016,
Cat. I/337). A total of 424489 stars in our sample have parallaxes in
the Tycho-Gaia Astrometric Solution (TGAS) sample (Cat. I/337).
File Summary:
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FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table2.dat 199 524221 Catalog Photometry for 1600080 Tycho-2 Stars
in Initial Iterative-color Technique Sample
table3.dat 215 355502 Fundamental Parameters of 355502 TGAS Stars
with Radii
table6.dat 215 1600080 Fundamental Parameters of 1600080 Tycho-2 Stars
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See also:
II/168 : Homogeneous Means in the UBV System (Mermilliod 1991)
I/259 : The Tycho-2 Catalogue (Hog+ 2000)
II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
VII/233 : The 2MASS Extended sources (IPAC/UMass, 2003-2006)
V/136 : Teff and metallicities for Tycho-2 stars (Ammons+, 2006)
III/272 : RAVE 4th data release (Kordopatis+, 2013)
V/146 : LAMOST DR1 catalogs (Luo+, 2015)
I/337 : Gaia DR1 (Gaia Collaboration, 2016)
J/A+A/580/A23 : Stroemgren-Crawford uvbyβ photometry catalog
(Paunzen, 2015)
J/ApJ/833/119 : Distances of Gaia DR1 TGAS sources (Astraatmadja+, 2016)
http://www.astro.ku.dk/~erik/Tycho-2 : Tycho-2 home page
Byte-by-byte Description of file:table2.dat
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Bytes Format Units Label Explanations
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1- 3 A3 --- --- [TYC]
4- 18 A15 --- TYC Tycho-2 identifier (TYC FFFF-NNNNN-N)
20- 31 F12.8 deg RAdeg Right Ascension in decimal degrees (J2000)
33- 44 F12.8 deg DEdeg Declination in decimal degrees (J2000)
46- 52 F7.3 mag BTmag [3.296/16.227]?=-99.999 Tycho-2 catalog BT band
magnitude (1)
54- 60 F7.3 mag e_BTmag [0.014/1.686]?=-99.999 Uncertainty in BTmag
62- 67 F6.3 mag VTmag [2.139/14.44]?=-99.999 Tycho-2 catalog VT band
magnitude (1)
69- 73 F5.3 mag e_VTmag [0.009/0.899]?=-99.999 Uncertainty in BTmag
75- 81 F7.3 mag Jmag [-0.245/15.767]?=-99.999 2MASS J band magnitude
(2)
83- 89 F7.3 mag e_Jmag [0.016/9.998]?=-99.999 Uncertainty in Jmag
91- 97 F7.3 mag Hmag [-1.034/15.297]?=-99.999 2MASS H band magnitude
(2)
99-105 F7.3 mag e_Hmag [0.013/9.998]?=-99.999 Uncertainty in Hmag
107-113 F7.3 mag Ksmag [-1.162/15.015]?=-99.999 2MASS Ks band
magnitude (2)
115-121 F7.3 mag e_Ksmag [0.011/9.998]?=-99.999 Uncertainty in Ksmag
123-129 F7.3 mag Bmag [2.567/13.449]?=-99.999 B band magnitude (3)
131-144 F14.10 mag e_Bmag ?=-99.999 Uncertainty in Bmag
146-152 F7.3 mag Vmag [2.036/12.655]?=-99.999 V band magnitude (3)
154-160 F7.3 mag e_Vmag [0/0.7]?=-99.999 Uncertainty in Vmag
162-168 F7.3 mag ymag [2.19/12.804]?=-99.999 Stromgren y band magnitude
(4)
170-176 F7.3 mag e_ymag [0/1.098]?=-99.999 Uncertainty in ymag
178-184 F7.3 mag bmag [3.066/13.204]?=-99.999 Stromgren b band
magnitude (4)
186-199 F14.10 mag e_bmag [0/1.11186]?=-99.999 Uncertainty in bmag
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Note (1): Hog et al. (2000, Cat. I/259);
Note (2): Skrutskie et al. (2006, Cat. VII/233) & Cutri et al. (2003,
Cat. II/246).
Note (3): Mermilliod (2006, Cat. II/168).
Note (4): Paunzen (2015, J/A+A/580/A23).
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Byte-by-byte Description of file: table3.dat table6.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 A3 --- --- [TYC]
4- 15 A12 --- TYC Tycho-2 identifier (TYC FFFF-NNNNN-N)
17- 23 F7.3 [-] logchi2 [-14.977/2] Log of the merit function
logχ2ν (see text)
25- 29 F5.3 mag AV [0/8.059] V band extinction
31- 35 F5.3 mag e_AV [0/4.745] Uncertainty in AV
37- 44 F8.3 K Teff [4059.61/8639.36] Effective temperature
46- 55 F10.3 K e_Teff [0/135101] Uncertainty in Teff
57- 63 F7.3 [mW/m2] logFb [-10.554/-4.887] Log bolometric flux
logFbol (in erg/s/cm2)
65- 71 F7.3 [mW/m2] e_logFb [-25.645/-6.118] Uncertainty in logFb
73- 80 F8.3 uarcsec theta [7.776/7986.31] Angular diameter θ
82- 90 F9.3 uarcsec e_theta [0.001/12639.9] Uncertainty in theta
92- 98 F7.3 mas plx [2.085/123.495]? Parallax (not in Table 6)
100-104 F5.3 mas e_plx [0.204/1]? Uncertainty in plx (not in Table 6)
106-112 F7.3 pc Dist [8.097/479.607]? Distance (not in Table 6)
114-119 F6.3 pc e_Dist [0.022/47.127]? Uncertainty in Dist (not
in Table 6)
121-126 F6.3 Rsun R* [0.106/45.027]? Radius (not in Table 6)
128-134 F7.3 Rsun e_R* [0.002/193.019]? Uncertainty in R* (not in
Table 6)
136-144 F9.3 K Teffs [3000/10394]?=-99.999 Spectroscopic effective
temperature
146-153 F8.3 K e_Teffs [1/2880]?=-99.999 Uncertainty in Teffs
155-166 F12.8 [Sun] [Fe/H] [-7.71/0.4]?=-99.999 Metallicity
168-179 F12.8 [Sun] e_[Fe/H] [0.00130465/6.185]?=-99.999 Uncertainty in
[Fe/H]
181-190 F10.6 [cm/s2] log(g) [-0.208/5.5]? Log surface gravity (not in
Table 3)
192-203 F12.8 [cm/s2] e_log(g) [0.00414126/1.359]? Uncertainty in log(g)
(not in Table 3)
205 I1 --- Flg1 [0/2]? Giant flag (not in Table 6) (1)
207-213 A7 --- Source ?=-99.999 Spectroscopy source (RAVE, LAMOST,
APOGEE)
215 I1 --- Flg2 [0/1]? Hot flag (not in Table 3) (2)
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Note (1): Giant flag as follows:
0 = Not identified as a giant (either via spectroscopic log g* or reduced
proper motion);
1 = Identified as a giant;
2 = Data are unavailable.
Note (2): Hot flag as follows:
1 = Teff>7000 K for which the iterative-color parameters may not be
reliable, see Section 3.2.2.
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History:
From electronic version of the journal
(End) Prepared by [AAS], Tiphaine Pouvreau [CDS] 27-Aug-2018