J/ApJS/225/32 Extended abundance analysis of cool stars (Brewer+, 2016)
Spectral properties of cool stars: extended abundance analysis of
1615 planet-search stars.
Brewer J.M., Fischer D.A., Valenti J.A., Piskunov N.
<Astrophys. J. Suppl. Ser., 225, 32-32 (2016)>
=2016ApJS..225...32B 2016ApJS..225...32B (SIMBAD/NED BibCode)
ADC_Keywords: Spectroscopy ; Abundances ; Rotational velocities ; Stars, masses
Keywords: catalogs; methods: data analysis; stars: abundances;
stars: fundamental parameters; stars: solar type;
techniques: spectroscopic
Abstract:
We present a catalog of uniformly determined stellar properties and
abundances for 1615 F, G, and K stars using an automated spectral
synthesis modeling procedure. All stars were observed using the HIRES
spectrograph at Keck Observatory. Our procedure used a single line
list to fit model spectra to observations of all stars to determine
effective temperature, surface gravity, metallicity, projected
rotational velocity, and the abundances of 15 elements (C, N, O, Na,
Mg, Al, Si, Ca, Ti, V, Cr, Mn, Fe, Ni, and Y). Sixty percent of the
sample had Hipparcos parallaxes and V-band photometry, which we
combined with the spectroscopic results to obtain mass, radius, and
luminosity. Additionally, we used the luminosity, effective
temperature, metallicity and α-element enhancement to
interpolate in the Yonsei-Yale isochrones to derive mass, radius,
gravity, and age ranges for those stars. Finally, we determined new
relations between effective temperature and macroturbulence for dwarfs
and subgiants. Our analysis achieved precisions of 25K in Teff,
0.01dex in [M/H], 0.028dex for logg, and 0.5km/s in vsini based on
multiple observations of the same stars. The abundance results were
similarly precise, between ∼0.01 and ∼0.04dex, though trends with
respect to Teff remained for which we derived empirical corrections.
The trends, though small, were much larger than our uncertainties and
are shared with published abundances. We show that changing our model
atmosphere grid accounts for most of the trend in [M/H] between 5000
and 5500K, indicating a possible problem with the atmosphere models or
opacities.
Description:
The stellar spectra in this study were all collected using the HIRES
spectrograph (R∼70000) on the Keck I telescope as part of one or more
radial-velocity planet-search programs under the collaborative
umbrella known as the California Planet Survey (CPS;
Howard+ 2010ApJ...721.1467H 2010ApJ...721.1467H).
In addition to stellar spectra, our data also include 20 spectra of
four different asteroids (4 Vesta, 1036 Ganymed, 3 Juno, and 10 Hygiea)
from five epochs throughout the 10-year period covered by the
observations in our sample. These spectra provided disk-integrated
solar spectra and were obtained to help calibrate our analysis by
providing small zero-point offsets for solar parameters and abundances.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table7.dat 42 7555 Atomic and molecular line parameters
table8.dat 87 1615 Spectroscopically determined stellar properties
(updated version sent by the author)
table9.dat 110 1615 Spectroscopically determined abundances
(updated version sent by the author)
table11.dat 130 1615 Derived stellar parameters
(corrected version sent by the author)
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See also:
J/ApJ/809/8 : Terrestrial planet occurrence rates for KOIs (Burke+, 2015)
J/ApJ/800/22 : Radial velocities of long-period planets (Feng+, 2015)
J/A+A/577/A9 : Sc, V, Mn, and Co in Milky Way stars (Battistini+, 2015)
J/A+A/568/A25 : C and O abundances in stellar populations (Nissen+, 2014)
J/A+A/562/A71 : Abundances of solar neighbourhood dwarfs (Bensby+, 2014)
J/ApJ/771/40 : Main-sequence A, F, G, & K stars photometry (Boyajian+, 2013)
J/A+A/555/A150 : Physical parameters of cool solar-type stars (Tsantaki+, 2013)
J/ApJ/764/78 : Oxygen abundances in nearby FGK stars (Ramirez+, 2013)
J/ApJ/757/161 : Spectroscopy of 56 exoplanet host stars (Torres+, 2012)
J/A+A/545/A32 : Chemical abundances of 1111 FGK stars (Adibekyan+, 2012)
J/ApJ/725/2349 : C/O vs Mg/Si of planetary systems (Delgado Mena+, 2010)
J/ApJ/725/875 : Chromospheric activity for CPS stars (Isaacson+, 2010)
J/other/Sci/330.653 : Detected planets in the Eta-Earth Survey (Howard+, 2010)
J/ApJ/715/1050 : Predicted abundances for extrasolar planets. I. (Bond+, 2010)
J/A+A/512/A54 : Teff and Fbol from Infrared Flux Method (Casagrande+, 2010)
J/A+A/497/497 : Physical parameters from JHK flux (Gonzalez-Hernandez+, 2009)
J/ApJS/159/141 : Spectroscopic properties of cool stars. I. (Valenti+, 2005)
J/A+A/435/373 : Broadening of Fe II lines by H collisions (Barklem+, 2005)
J/ApJ/622/1102 : The planet-metallicity correlation. (Fischer+, 2005)
J/A+A/415/1153 : [Fe/H] for 98 extra-solar planet-host stars (Santos+, 2004)
J/A+A/394/927 : Age-metallicity relation for nearby stars (Ibukiyama+, 2002)
J/A+A/275/101 : Chemical evolution of the galactic disk I. (Edvardsson+ 1993)
Byte-by-byte Description of file: table7.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 A3 --- El Element
5 I1 --- Ion [1/5]? Ion identification
7- 15 F9.4 0.1nm lambda [5164/7799] Wavelength, Angstroms
17- 21 F5.2 eV ExPot [0/72] Excitation potential
23- 30 F8.4 [-] log(gf) [-20.1/2] Log of the oscillator strength
32- 40 F9.4 --- Gamma6 [-10/1953]? Coefficient for broadening (1)
42 A1 --- M [x] x = Line masked from fitting
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Note (1): Coefficients listed here are either the traditional van der Waals
coefficients or a temperature dependent exponent from Anstee, Barklem and
O'Mara (ABO) theory (Barklem et al. 2000, J/A+AS/142/467) when the sign is
positive. This is the format given in the Vienna Atomic Line Database 3
(VALD-3).
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Byte-by-byte Description of file: table8.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 4 I4 --- SPOCS [2/3247] SPOCS ID (G1)
6- 19 A14 --- Name Star name
21- 24 I4 K Teff [4702/6773] Stellar effective temperature
26- 29 F4.2 [cm/s2] logg [2.6/5] Stellar surface gravity
31- 35 F5.2 [Sun] [M/H] [-1.2/0.6] Stellar metallicity
37- 42 F6.2 --- S [-1.9/540] Mount Wilson Ca HK activity index
44- 48 F5.2 [-] logRhk [-6.3/-1.7]? log(R'HK) activity index
50- 53 F4.1 km/s Vbr [0.6/25] Derived velocity broadening
55- 58 F4.1 km/s Vsini [0/20.1] Derived projected rotational velocity
60- 63 F4.1 km/s Vmac [1.6/23.3] Derived macroturbulent velocity
65- 70 F6.1 km/s Vrad [-137/164] Barycentric radial velocity
at time of observation
72- 74 I3 --- SNR [14/492] Signal to Noise ratio at 6000 Angstroms
76- 79 F4.2 --- Crms [0.01/0.3] RMS scatter in continuum
81- 84 F4.2 --- Lrms [0.01/0.1] RMS scatter in line
86- 87 I2 --- N [1/23] Number of spectra fit for that star
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Byte-by-byte Description of file: table9.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- SPOCS [2/3247] SPOCS ID (G1)
6- 19 A14 --- Name Star name
21- 25 F5.2 [-] [C/H] [-0.9/0.7]? Derived [C/H] abundance
27- 31 F5.2 [-] [N/H] [-1.7/0.9]? Derived [N/H] abundance
33- 37 F5.2 [-] [O/H] [-0.5/0.8]? Derived [O/H] abundance
39- 44 F6.2 [-] [Na/H] [-21.5/0.8]? Derived [Na/H] abundance
46- 50 F5.2 [-] [Mg/H] [-1.2/0.6]? Derived [Mg/H] abundance
52- 56 F5.2 [-] [Al/H] [-1.5/1.1]? Derived [Al/H] abundance
58- 62 F5.2 [-] [Si/H] [-1.4/0.6]? Derived [Si/H] abundance
64- 68 F5.2 [-] [Ca/H] [-1.5/0.6]? Derived [Ca/H] abundance
70- 74 F5.2 [-] [Ti/H] [-0.9/0.6]? Derived [Ti/H] abundance
76- 80 F5.2 [-] [V/H] [-0.9/0.6]? Derived [V/H] abundance
82- 86 F5.2 [-] [Cr/H] [-1.2/0.6]? Derived [Cr/H] abundance
88- 92 F5.2 [-] [Mn/H] [-2.2/0.8]? Derived [Mn/H] abundance
94- 98 F5.2 [-] [Fe/H] [-1.2/0.6]? Derived [Fe/H] abundance
100-104 F5.2 [-] [Ni/H] [-1.5/0.7]? Derived [Ni/H] abundance
106-110 F5.2 [-] [Y/H] [-1.6/2]? Derived [Y/H] abundance
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Byte-by-byte Description of file: table11.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 4 I4 --- SPOCS [2/3247] SPOCS ID (G1)
6- 19 A14 --- Name Star name
21- 22 I2 h RAh SIMBAD Hour of Right Ascension (J2000)
24- 25 I2 min RAm Minute of Right Ascension (J2000)
27- 30 F4.1 s RAs Second of Right Ascension (J2000)
32- 32 A1 --- DE- SIMBAD Sign of the Declination (J2000)
33- 34 I2 deg DEd SIMBAD Degree of Declination (J2000)
36- 37 I2 arcmin DEm Arcminute of Declination (J2000)
39- 40 I2 arcsec DEs Arcsecond of Declination (J2000)
42- 46 F5.2 mag Vmag [1.7/10.1]? V magnitude from SIMBAD
48- 53 F6.2 pc Dist [3.6/353]? Distance from SIMBAD
55- 59 F5.2 [Lsun] logL [-0.8/1.8]? Derived Stellar Luminosity (1)
61- 64 F4.2 [Lsun] e_logL [0.01/1.1]? Uncertainty in logL (1)
66- 70 F5.2 Rsun Rstar [0.6/10]? Derived Stellar Radius (1)
72- 76 F5.2 Rsun e_Rstar [0.02/4]? Uncertainty in Rstar (1)
78- 83 F6.2 Msun Mstar [0.2/7]? Derived Stellar Mass (1)
85- 90 F6.2 Msun e_Mstar [0.03/14]? Uncertainty in Mstar (1)
92- 95 F4.2 Msun Miso [0.6/3]? Isochrone derived stellar mass (2)
97-100 F4.2 Msun b_Miso [0.6/2.2]? Lower bound on derived Miso (2)
102-105 F4.2 Msun B_Miso [0.6/3]? Upper bound on derived Miso (2)
107-110 F4.2 [cm/s2] logg2 [1.6/5]? Isochrone derived surface gravity (2)
112-115 F4.2 [cm/s2] e_logg2 [0.01/0.3]? Uncertainty in logg-iso (2)
117-120 F4.1 Gyr Age [0.6/15]? Isochrone derived age (2)
122-125 F4.1 Gyr b_Age [0.2/14]? Lower bound on derived Age (2)
127-130 F4.1 Gyr B_Age [1/15]? Upper bound on derived Age (2)
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Note (1): Stellar properties derived from Vmag and distance, the bolometric
corrections of VandenBerg & Clem (2003AJ....126..778V 2003AJ....126..778V) and
the values of Teff and log g in this work;
Note (2): Stellar properties derived from this luminosity, the final Teff
derived in this work, [Fe/H], and [Si/H] and interpolating in a
grid of Yonsei-Yale isochrones (Demarque et al., 2004ApJS..155..667D 2004ApJS..155..667D).
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Global note:
Note (G1): SPOCS ID numbers are shared with the VF05 (Valenti & Fischer 2005,
J/ApJS/159/141) catalog for stars in common between that work and
this. Stars new to this catalog have an ID≥2000.
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Acknowledgments:
John M. Brewer [Yale University] for tables 8, 9 and 11.
History:
* From electronic version of the journal
* 21-Nov-2016: Updated version of table 11 (right ascensions corrected
for some SPOCS≥2000 and 2 duplicated stars --#2064 and #2116-- removed);
and versions of tables 8 and 9 updated to 1615 stars.
See also erratum published in 2017, ApJS, 230, 12
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 20-Oct-2016