J/AJ/142/193 RAVE stellar elemental abundances (DR1) (Boeche+, 2011)
The RAVE catalog of stellar elemental abundances: first data release.
Boeche C., Siebert A., Williams M., de Jong R.S., Steinmetz M.,
Fulbright J.P., Ruchti G.R., Bienayme O., Bland-Hawthorn J., Campbell R.,
Freeman K.C., Gibson B.K., Gilmore G., Grebel E.K., Helmi A., Munari U.,
Navarro J.F., Parker Q.A., Reid W., Seabroke G.M., Siviero A., Watson F.G.,
Wyse R.F.G., Zwitter T.
<Astron. J., 142, 193 (2011)>
=2011AJ....142..193B 2011AJ....142..193B
ADC_Keywords: Abundances ; Spectroscopy ; Milky Way
Keywords: catalogs - Galaxy: abundances - Galaxy: evolution -
stars: abundances - surveys - techniques: spectroscopic
Abstract:
We present chemical elemental abundances for 36561 stars observed by
the RAdial Velocity Experiment (RAVE), an ambitious spectroscopic
survey of our Galaxy at Galactic latitudes |b|>25° and with
magnitudes in the range 9<IDENIS<13. RAVE spectra cover the
Ca-triplet region at 8410-8795Å with resolving power R∼7500. This
first data release of the RAVE chemical catalog is complementary to
the third RAVE data release of radial velocities and stellar
parameters, and it contains chemical abundances for the elements Mg,
Al, Si, Ca, Ti, Fe, and Ni, with a mean error of ∼0.2dex, as judged
from accuracy tests performed on synthetic and real spectra.
Abundances are estimated through a dedicated processing pipeline in
which the curve of growth of individual lines is obtained from a
library of absorption line equivalent widths to construct a model
spectrum that is then matched to the observed spectrum via a χ2
minimization technique. We plan to extend this pipeline to include
estimates for other elements, such as oxygen and sulfur, in future
data releases.
Description:
This first release of the RAVE chemical catalog reports the chemical
abundances of seven elements (Mg, Al, Si, Ca, Ti, Fe, Ni) for 36561
stars (from 37848 spectra) selected from the RAVE DR3 (Cat. III/265).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 166 37848 Catalog of stellar elemental abundances (DR1)
table4.dat 41 615 The RAVE line list
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See also:
B/pastel : The PASTEL catalogue (Soubiran+, 2010-)
III/265 : RAVE 3rd data release (Siebert+, 2011)
V/130 : Geneva-Copenhagen Survey of Solar neighbourhood III (Holmberg+, 2009)
III/193 : Chemical Abundances in Late-Type Stars (Thevenin, 1998)
J/A+A/275/101 : Chemical evolution of the galactic disk I. (Edvardsson+ 1993)
J/AJ/128/1177 : Galactic stellar abundances (Venn+, 2004)
J/AJ/129/1063 : Abundances of stars within 15pc of the Sun (Luck+, 2005)
J/ApJS/159/141 : Spectroscopic properties of cool stars. I. (Valenti+, 2005)
J/A+A/438/139 : Abundances in Milky Way's disk (Soubiran+, 2005)
J/MNRAS/367/1329 : Elemental abundances for 176 stars (Reddy+, 2006)
J/AJ/133/2464 : Parameters and abundances of nearby giants (Luck+, 2007)
J/A+A/511/A90 : RAVE distance catalogue (Breddels+, 2010)
J/A+A/522/A54 : Distance determination for RAVE stars. II. (Zwitter+, 2010)
J/AJ/140/184 : RAVE double-lined spectroscopic binaries (Matijevic+, 2010)
J/ApJ/737/9 : RAVE data of stars in the thick disk (Ruchti+, 2011)
J/MNRAS/419/2844 : Radial metallicity gradient from RAVE DR3 (Coskunoglu+ 2012)
http://www.rave-survey.org/ : RAVE home page
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 16 A16 --- RAVE RAVE target designation (JHHMMSS.s+DDMMSS)
18- 33 A16 --- Name Target designation
35- 42 I8 "YYYYMMDD" Date [20040403/20060331] Date of observation
44- 51 A8 --- Field Name of RAVE field (HHMMmDDa)
53- 55 I3 --- Fiber [1/150] Fiber number
57- 61 F5.2 [-] [Mg/H] ?=-9.99 Log of the Mg/H number abundance (1)
63 I1 --- o_[Mg/H] Number of Mg lines measured for Mg/H
65- 69 F5.2 [-] [Al/H] ?=-9.99 Log of the Al/H number abundance (1)
71 I1 --- o_[Al/H] Number of Al lines measured for Al/H
73- 77 F5.2 [-] [Si/H] ?=-9.99 Log of the Si/H number abundance (1)
79- 80 I2 --- o_[Si/H] Number of Si lines measured for Si/H
82- 86 F5.2 [-] [Ca/H] ?=-9.99 Log of the Ca/H number abundance (1)
88 I1 --- o_[Ca/H] Number of Ca lines measured for Ca/H
90- 94 F5.2 [-] [Ti/H] ?=-9.99 Log of the Ti/H number abundance (1)
96- 97 I2 --- o_[Ti/H] Number of Ti lines measured for Ti/H
99-103 F5.2 [-] [Fe/H] [-2.48/1.02]?=-9.99 Log of the Fe/H number
abundance (1)
105-106 I2 --- o_[Fe/H] Number of Fe lines measured for Fe/H
108-112 F5.2 [-] [Ni/H] ?=-9.99 Log of the Ni/H number abundance (1)
114 I1 --- o_[Ni/H] Number of Ni line measured for Ni/H
116-119 I4 K Teff [4000/6999] RAVE effective temperature
121-124 F4.2 [cm/s2] log(g) [0.04/4.99] Log of RAVE gravity
126-130 F5.2 [-] [m/H]R [-2.31/0.5] RAVE metallicity
132-136 F5.2 [-] [m/H]c ?=-9.99 Metallicity from chemical pipeline
138-142 F5.2 [-] [a/Fe]c [-0.83/1.1]?=-9.99 The α-enhancement
from chemical pipeline
144-148 F5.1 --- S/N [19.9/219.4] Signal-to-Noise ratio
150-153 F4.2 --- Frac [0/1] Fraction of spectrum matching
template well (2)
155-157 I3 --- Ntot [0/547] Total number of lines measured
159-166 F8.1 --- chi2 The χ2 between observed and template
spectra
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Note (1): We adopted the solar abundances given by Grevesse & Sauval
(1998SSRv...85..161G 1998SSRv...85..161G).
Note (2): See section 2.7 for the explanation of the process repeated for all
the pixels of the spectrum, resulting in an array of 0 and 1, with 1
label indicating non-defective pixels.
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 8 F8.3 0.1nm lambda [8401.4/8798.08] Wavelength λ
10- 14 F5.1 --- Species [1/607] Atomic species (1)
16- 24 F9.6 eV ExPot [0.599266/12.0883] Excitation potential
26- 31 F6.3 [-] log(gf) [-6.252/0.536] Log of the oscillator strength (2)
33- 36 F4.2 --- E [0/6.5] Enhancement factor for the Unsold
approximation
38- 41 F4.2 eV Edis [0/7.75] Dissociation energy (3)
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Note (1): In the format XX.Y where XX is the atomic number and Y is the level
of ionization, e.g. 26.0=Fe I. The atomic species 607.0 represent
the CN molecule, following the MOOG format.
Note (2): The whole table contains 604 lines with log gf correction, and the 3
Ca II and 8 HI lines which are not used for elemental abundance
measurements (and did not undergo to log(gf) corrections).
Note (3): For the CN molecule the dissociation energy is D=7.75eV, as
suggested by Sauval & Grevesse (1994IAUS..154..549S 1994IAUS..154..549S).
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Sylvain Guehenneux [CDS] 22-Mar-2013