J/ApJS/191/352 Abundances in stars of Milky Way dwarf satellites (Kirby+, 2010)
Multi-element abundance measurements from medium-resolution spectra.
II. Catalog of stars in Milky Way dwarf satellite galaxies.
Kirby E.N., Guhathakurta P., Simon J.D., Geha M.C., Rockosi C.M.,
Sneden C., Cohen J.G., Sohn S.T., Majewski S.R., Siegel M.
<Astrophys. J. Suppl. Ser., 191, 352-375 (2010)>
=2010ApJS..191..352K 2010ApJS..191..352K
ADC_Keywords: Abundances, [Fe/H] ; Effective temperatures ; Galaxies, nearby ;
Milky Way ; Photometry, UBVRI ; Spectroscopy
Keywords: galaxies: abundances - galaxies: dwarf - Galaxy: evolution -
Local Group
Abstract:
We present a catalog of Fe, Mg, Si, Ca, and Ti abundances for 2961
stars in eight dwarf satellite galaxies of the Milky Way (MW):
Sculptor, Fornax, Leo I, Sextans, Leo II, Canes Venatici I, Ursa
Minor, and Draco. For the purposes of validating our measurements, we
also observed 445 red giants in MW globular clusters and 21 field red
giants in the MW halo. The measurements are based on Keck/DEIMOS
medium-resolution spectroscopy (MRS) combined with spectral synthesis.
We estimate uncertainties in [Fe/H] by quantifying the dispersion of
[Fe/H] measurements in a sample of stars in monometallic globular
clusters (GCs). We estimate uncertainties in Mg, Si, Ca, and Ti
abundances by comparing to high-resolution spectroscopic abundances of
the same stars. For this purpose, a sample of 132 stars with published
high-resolution spectroscopy in GCs, the MW halo field, and dwarf
galaxies has been observed with MRS. The standard deviations of the
differences in [Fe/H] and <[α/Fe]> (the average of [Mg/Fe],
[Si/Fe], [Ca/Fe], and [Ti/Fe]) between the two samples is 0.15 and
0.16, respectively.
Description:
The medium-resolution abundances in this article depend on
spectroscopy obtained with the Deep Imaging Multi-Object Spectrograph
(DEIMOS) on the Keck II telescope, between 2003 Oct and 2010 Aug, and
photometry from a variety of sources.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 26 630 Important atomic spectral lines
table4.dat 175 2961 DEIMOS multi-element abundances catalog
table6.dat 117 2961 Effect of errors in atmospheric parameters on
abundances
table7.dat 250 132 Comparison between high-resolution and DEIMOS
abundances
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See also:
II/294 : The SDSS Photometric Catalog, Release 7 (Adelman-McCarthy+, 2009)
J/PASP/110/533 : BR photometry of Fornax bright stars (Stetson+ 1998)
J/AJ/124/3222 : VI photometry of Draco and UMi galaxies (Bellazzini+, 2002)
J/AJ/126/2840 : BVI CCD photometry of Sextans dSph galaxy (Lee+, 2003)
J/MNRAS/363/734 : Sculptor dSph variables metal abundances (Clementini+, 2005)
J/AJ/130/1065 : Members of the Sculptor dwarf spheroidal galaxy (Coleman+,
2005)
J/A+A/459/423 : VI and [Fe/H] of Fornax dSph RGB stars (Battaglia+, 2006)
J/ApJ/663/960 : Radial velocities of Leo I stars (Sohn+, 2007)
J/ApJ/657/241 : Spectroscopy of Leo I red giants (Koch+, 2007)
J/AJ/133/270 : Metallicities and ages in Leo II dSph (Koch+, 2007)
J/MNRAS/378/318 : Chemical abundances in Leo I and II dSph (Bosler+, 2007)
J/MNRAS/375/831 : Draco MegaCam, INT and HST photometry (Segall+, 2007)
J/A+A/465/357 : Stroemgren photometry in the Draco dSph galaxy (Faria+, 2007)
J/ApJ/705/328 : Abundance measurements. I. Sculptor dSph (Kirby+, 2009)
Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- Ion Element and ionization state
6- 13 F8.3 0.1nm lambda Wavelength in Angstroms
15- 19 F5.3 eV EP Excitation potential
21- 26 F6.3 [-] loggf Logarithm of oscillator strength
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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- 5 A5 --- dSph Dwarf spheroidal galaxy (1)
7- 16 A10 --- Name Object name
18- 19 I2 h RAh Hour of Right Ascension (J2000)
21- 22 I2 min RAm Minute of Right Ascension (J2000)
24- 28 F5.2 s RAs Second of Right Ascension (J2000)
30 A1 --- DE- Sign of the Declination (J2000)
31- 32 I2 deg DEd Degree of Declination (J2000)
34- 35 I2 arcmin DEm Arcminute of Declination (J2000)
37- 40 F4.1 arcsec DEs Arcsecond of Declination (J2000)
42- 47 F6.3 mag Bmag ? Extinction-corrected B magnitude
49- 53 F5.3 mag e_Bmag ? Uncertainty in Bmag
55- 60 F6.3 mag Vmag ? Extinction-corrected V magnitude
62- 66 F5.3 mag e_Vmag ? Uncertainty in Vmag
68- 73 F6.3 mag Rmag ? Extinction-corrected R magnitude
75- 79 F5.3 mag e_Rmag ? Uncertainty in Rmag
81- 86 F6.3 mag Imag ? Extinction-corrected I magnitude
88- 92 F5.3 mag e_Imag ? Uncertainty in Imag
94- 97 I4 K Teff Effective temperature
99-101 I3 K e_Teff Teff uncertainty from spectral fitting
103-105 I3 K e_Tph Teff uncertainty from photometric error only
107-110 F4.2 [cm/s2] logg Log of surface gravity
112-115 F4.2 [cm/s2] e_logg Uncertainty in log(g)
117-120 F4.2 km/s vt Microturbulent velocity
122-126 F5.2 [Sun] [Fe/H] Iron abundance relative to the Sun
128-131 F4.2 [Sun] e_[Fe/H] Uncertainty in [Fe/H]
133-137 F5.2 [Sun] [Mg/Fe] ? Magnesium-to-iron ratio relative to the Sun
139-142 F4.2 [Sun] e_[Mg/Fe] ? Uncertainty in [Mg/Fe]
144-148 F5.2 [Sun] [Si/Fe] ? Silicon-to-iron ratio relative to the Sun
150-153 F4.2 [Sun] e_[Si/Fe] ? Uncertainty in [Si/Fe]
155-159 F5.2 [Sun] [Ca/Fe] ? Calcium-to-iron ratio relative to the Sun
161-164 F4.2 [Sun] e_[Ca/Fe] ? Uncertainty in [Ca/Fe]
166-170 F5.2 [Sun] [Ti/Fe] ? Titanium-to-iron ratio relative to the Sun
172-175 F4.2 [Sun] e_[Ti/Fe] ? Uncertainty in [Ti/Fe]
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Note (1): Photometry is given from the following sources:
Scl = Sculptor, Westfall et al. (2006AJ....131..375W 2006AJ....131..375W);
For = Fornax, Stetson et al. (1998, Cat. J/PASP/110/533);
LeoI = Sohn et al. (2007, Cat. J/ApJ/663/960);
Sex = Sextans, Lee et al. (2003, Cat. J/AJ/126/2840);
LeoII = unpublished, but obtained in the same fashion as for Leo I;
CVnI = Canes Venatici I, SDSS DR5 Adelman-McCarthy et al. (2007,
Cat. II/276, obsoleted by II/294);
UMi = Ursa Minor, Bellazzini et al. (2002, Cat. J/AJ/124/3222);
Dra = Draco, Segall et al. (2007, Cat. J/MNRAS/375/831).
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Byte-by-byte Description of file: table6.dat
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Bytes Format Units Label Explanations
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1- 5 A5 --- dSph Dwarf spheroidal galaxy
7- 16 A10 --- Name Object name
19- 22 F4.2 [-] [Fe/H]125 ? Absolute change in [Fe/H] with Teff+125K
24- 27 F4.2 [-] [Fe/H]250 ? Absolute change in [Fe/H] with Teff+250K
29- 32 F4.2 [-] [Fe/H]0.3 ? Absolute change in [Fe/H] with logg+0.3
34- 37 F4.2 [-] [Fe/H]0.6 ? Absolute change in [Fe/H] with logg+0.6
39- 42 F4.2 [-] [Mg/Fe]125 Absolute change in [Mg/Fe] with Teff+125K
44- 47 F4.2 [-] [Mg/Fe]250 Absolute change in [Mg/Fe] with Teff+250K
49- 52 F4.2 [-] [Mg/Fe]0.3 Absolute change in [Mg/Fe] with logg+0.3
54- 57 F4.2 [-] [Mg/Fe]0.6 Absolute change in [Mg/Fe] with logg+0.6
59- 62 F4.2 [-] [Si/Fe]125 Absolute change in [Si/Fe] with Teff+125K
64- 67 F4.2 [-] [Si/Fe]250 Absolute change in [Si/Fe] with Teff+250K
69- 72 F4.2 [-] [Si/Fe]0.3 Absolute change in [Si/Fe] with logg+0.3
74- 77 F4.2 [-] [Si/Fe]0.6 Absolute change in [Si/Fe] with logg+0.6
79- 82 F4.2 [-] [Ca/Fe]125 ? Absolute change in [Ca/Fe] with Teff+125K
84- 87 F4.2 [-] [Ca/Fe]250 ? Absolute change in [Ca/Fe] with Teff+250K
89- 92 F4.2 [-] [Ca/Fe]0.3 ? Absolute change in [Ca/Fe] with logg+0.3
94- 97 F4.2 [-] [Ca/Fe]0.6 ? Absolute change in [Ca/Fe] with logg+0.6
99-102 F4.2 [-] [Ti/Fe]125 Absolute change in [Ti/Fe] with Teff+125K
104-107 F4.2 [-] [Ti/Fe]250 Absolute change in [Ti/Fe] with Teff+250K
109-112 F4.2 [-] [Ti/Fe]0.3 Absolute change in [Ti/Fe] with logg+0.3
114-117 F4.2 [-] [Ti/Fe]0.6 Absolute change in [Ti/Fe] with logg+0.6
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Byte-by-byte Description of file: table7.dat
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Bytes Format Units Label Explanations
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1- 14 A14 --- System Celestial body in which the star is found
16- 28 A13 --- Name Name of the star
30- 47 A18 --- AutH Author's name(s) for high-resolution
measurements (HRS) reference
49- 67 A19 --- BibCode1 Bibcode for HRS reference
69- 87 A19 --- BibCode2 2nd bibcode for HRS reference
89- 90 I2 h RAh Hour of Right Ascension (J2000)
92- 93 I2 min RAm Minute of Right Ascension (J2000)
95- 98 F4.1 s RAs Second of Right Ascension (J2000)
100 A1 --- DE- Sign of the Declination (J2000)
101-102 I2 deg DEd Degree of Declination (J2000)
104-105 I2 arcmin DEm Arcminute of Declination (J2000)
107-110 F4.1 arcsec DEs Arcsecond of Declination (J2000)
112-115 I4 K TeffH Effective temperature from HRS study
117-120 F4.2 [cm/s2] loggH Log of surface gravity from HRS study
122-125 F4.2 km/s vtH ? Microturbulent velocity from HRS study
127-131 F5.2 [Sun] [Fe/H]H HRS iron abundance (1)
133-136 F4.2 [Sun] e_[Fe/H]H Uncertainty in [Fe/H]HRS (1)
138-142 F5.2 [Sun] [Mg/Fe]H ? HRS magnesium-to-iron ratio (1)
144-147 F4.2 [Sun] e_[Mg/Fe]H ? Uncertainty in [Mg/Fe]HRS (1)
149-153 F5.2 [Sun] [Si/Fe]H ? HRS silicon-to-iron ratio (1)
155-158 F4.2 [Sun] e_[Si/Fe]H ? Uncertainty in [Si/Fe]HRS (1)
160-164 F5.2 [Sun] [Ca/Fe]H ? HRS calcium-to-iron ratio (1)
166-169 F4.2 [Sun] e_[Ca/Fe]H ? Uncertainty in [Ca/Fe]HRS (1)
171-175 F5.2 [Sun] [Ti/Fe]H ? HRS titanium-to-iron ratio (1)
177-180 F4.2 [Sun] e_[Ti/Fe]H ? Uncertainty in [Ti/Fe]HRS (1)
182-185 I4 K TeffM Effective temperature from MRS study
187-190 F4.2 [cm/s2] loggM Log of surface gravity from MRS study
192-195 F4.2 km/s vtM Microturbulent velocity from MRS study
197-201 F5.2 [Sun] [Fe/H]M MRS iron abundance (1)
203-206 F4.2 [Sun] e_[Fe/H]M Uncertainty in [Fe/H]MRS (1)
208-212 F5.2 [Sun] [Mg/Fe]M ? MRS magnesium-to-iron ratio (1)
214-217 F4.2 [Sun] e_[Mg/Fe]M ? Uncertainty in [Mg/Fe]MRS (1)
219-223 F5.2 [Sun] [Si/Fe]M ? MRS silicon-to-iron ratio (1)
225-228 F4.2 [Sun] e_[Si/Fe]M ? Uncertainty in [Si/Fe]MRS (1)
230-234 F5.2 [Sun] [Ca/Fe]M ? MRS calcium-to-iron ratio (1)
236-239 F4.2 [Sun] e_[Ca/Fe]M ? Uncertainty in [Ca/Fe]MRS (1)
241-245 F5.2 [Sun] [Ti/Fe]M ? MRS titanium-to-iron ratio (1)
247-250 F4.2 [Sun] e_[Ti/Fe]M ? Uncertainty in [Ti/Fe]MRS (1)
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Note (1): Relative to the Sun.
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History:
From electronic version of the journal
References:
Kirby et al. Paper I. 2009ApJ...705..328K 2009ApJ...705..328K Cat. J/ApJ/705/328
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 18-Jan-2011