J/AJ/131/1288 Composite spectra of early-type galaxies (Bernardi+, 2006)
Evolution and environment of early-type galaxies.
Bernardi M., Nichol R.C., Sheth R.K., Miller C.J., Brinkmann J.
<Astron. J., 131, 1288-1317 (2006)>
=2006AJ....131.1288B 2006AJ....131.1288B
ADC_Keywords: Galaxies, spectra ; Galaxies, photometry
Keywords: galaxies: elliptical and lenticular, cD - galaxies: evolution -
galaxies: fundamental parameters - galaxies: photometry -
galaxies: stellar content
Abstract:
Chemical abundance indicators are studied using composite spectra,
which we provide in tabular form. Tables of line strengths measured
from these spectra and parameters derived from these line strengths
are also provided. All the objects we analyze were selected from the
SDSS database. We selected all objects targeted as galaxies and having
Petrosian apparent magnitude 14.5≤rPet≤17.75. To extract a sample
of early-type galaxies, we then chose the subset with the
spectroscopic parameter eclass<0, which classifies the spectral type
based on a principal component analysis, and the photometric parameter
fracDevr>0.8, which is a seeing-corrected indicator of morphology.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 88 925 Composite spectra
table2.dat 100 925 Line-strengths and uncertainties measured from
the composite spectra given in Table 1
table3.dat 164 925 Lick index-strengths and uncertainties measured
from the composite spectra given in Table 1
table4.dat 180 925 Additional Lick index-strengths and uncertainties
measured from the composite spectra given in Table 1
table7.dat 84 925 Lick index-strengths and uncertainties used to
measure age, [Z/H], and [α/Fe] from SSP models
table8.dat 88 925 Age, [Z/H] and [α] obtained using the Lick
index-strengths reported in Table 7 and the SSP
models of 2003MNRAS.339..897T 2003MNRAS.339..897T-2004MNRAS.351L..19T 2004MNRAS.351L..19T
sp/* . 925 FITS files with spectra
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Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- Spec Spectrum identification number
6 I1 --- zBin Redshift bin used (1)
8- 15 F8.6 --- Mean redshift galaxy
17 I1 --- <rBin> The r-band absolute magnitude bin used (2)
19- 25 F7.3 mag <rMAG> Mean absolute r-band magnitude (3)
27- 33 F7.3 mag <iMAG> Mean absolute i-band magnitude (4)
35- 36 I2 --- vBin Velocity dispersion bin used (5)
38- 42 F5.3 [km/s] Mean log velocity dispersion
44- 45 I2 --- RBin Effective r-band radius bin (6)
47- 52 F6.3 [kpc] <logR> Mean log effective r-band radius
in units of kpc/h
54- 59 F6.2 mag <g-r> Mean SDSS g-r color index
61- 65 F5.2 --- <Frac> Photometric parameter fracDevr (7)
67 I1 --- IDBin The environment identification (8)
69- 71 I3 --- Ngal Number of galaxies used in composite spectrum
73- 75 I3 --- S/N Composite spectrum Signal-to-Noise.
77- 88 A12 --- FileName Name of the FITS file with the spectra,
in sp subdirectory
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Note (1): Redshift bin used, defined as follows:
1 = 0.05<z<0.07;
2 = 0.07<z<0.09;
3 = 0.09<z<0.12;
4 = 0.12<z<0.14.
Note (2): The r-band bin used, defined as follows:
1 = -19.5<rMAG←20.0;
2 = -20.0<rMAG←20.5;
3 = -20.5<rMAG←21.0;
4 = -21.0<rMAG←21.5;
5 = -21.5<rMAG←22.0;
6 = -22.0<rMAG←22.5;
7 = -22.5<rMAG←23.0;
8 = -23.0<rMAG←23.5;
9 = -23.5<rMAG←24.0.
Note (3): Corrected for evolution according to the results of Bernardi et al.
2003AJ....125.1849B 2003AJ....125.1849B: absmagcorr=absmagnocorr+0.85*z.
Note (4): Corrected for evolution according to the results of Bernardi et al.
2003AJ....125.1849B 2003AJ....125.1849B: absmagcorr=absmagnocorr+0.75*z.
Note (5): Velocity dispersion bin used, defined as follows:
1 = 2.00<logV<2.05;
2 = 2.05<logV<2.10;
3 = 2.10<logV<2.15;
4 = 2.15<logV<2.20;
5 = 2.20<logV<2.25;
6 = 2.25<logV<2.30;
7 = 2.30<logV<2.35;
8 = 2.35<logV<2.40;
9 = 2.40<logV<2.45;
10 = 2.45<logV<2.50;
11 = 2.50<logV<2.55.
Note (6): Effective r-band radius bin, defined as follows:
1 = 0.00<logR<0.10;
2 = 0.10<logR<0.20;
3 = 0.20<logR<0.30;
4 = 0.30<logR<0.40;
5 = 0.40<logR<0.50;
6 = 0.50<logR<0.60;
7 = 0.60<logR<0.70;
8 = 0.70<logR<0.80;
9 = 0.80<logR<0.90;
10 = 0.90<logR<1.00;
11 = 1.00<logR<1.10.
Note (7): fracDevr is a seeing-corrected indicator of morphology and is
obtained by taking the best-fit exponential and de Vaucouleurs fits to
the surface brightness profile, finding the linear combination of the
two that best fits the image, and storing the fraction contributed by
the de Vaucouleurs fit.
Note (8): The environment identification, defined as follows:
1 = high density;
0 = low density.
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- Spec Spectrum identification number
6- 12 F7.3 0.1nm [OII] The [OII] line strength in Angstroms
14- 20 F7.3 0.1nm e_[OII] Error in [OII]
22- 28 F7.3 0.1nm HdA The HδA line strength in Angstroms
30- 36 F7.3 0.1nm e_HdA Error in HdA
38- 44 F7.3 0.1nm HdF The HδF line strength in Angstroms
46- 52 F7.3 0.1nm e_HdF Error in HdF
54- 60 F7.3 0.1nm HgA The HγA line strength in Angstroms
62- 68 F7.3 0.1nm e_HgA Error in HgA
70- 76 F7.3 0.1nm HgF The HγF line strength in Angstroms
78- 84 F7.3 0.1nm e_HgF Error in HgF
86- 92 F7.3 0.1nm D4000 The D4000 line strength in Angstroms
94-100 F7.3 0.1nm e_D4000 Error in D4000
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- Spec Spectrum identification number
6- 12 F7.3 mag CN1 Lick CN1 index strength
14- 20 F7.3 mag e_CN1 Error in CN1
22- 28 F7.3 mag CN2 Lick CN2 index strength
30- 36 F7.3 mag e_CN2 Error in CN2
38- 44 F7.3 0.1nm Ca4227 Lick Ca4227 index strength in Angstroms
46- 52 F7.3 0.1nm e_Ca4227 Error in Ca4227
54- 60 F7.3 0.1nm G4300 Lick G4300 index strength in Angstroms
62- 68 F7.3 0.1nm e_G4300 Error in G4300
70- 76 F7.3 0.1nm Fe4383 Lick Fe4383 index strength in Angstroms
78- 84 F7.3 0.1nm e_Fe4383 Error in Fe4383
86- 92 F7.3 0.1nm Ca4455 Lick Ca4455 index strength in Angstroms
94-100 F7.3 0.1nm e_Ca4455 Error in Ca4455
102-108 F7.3 0.1nm Fe4531 Lick Fe4531 index strength in Angstroms
110-116 F7.3 0.1nm e_Fe4531 Error in Fe4531
118-124 F7.3 0.1nm C2-4668 Lick C24668 index strength in Angstroms
126-132 F7.3 0.1nm e_C2-4668 Error in C2-4668
134-140 F7.3 0.1nm Hb Lick Hβ index strength in Angstroms
142-148 F7.3 0.1nm e_Hb Error in Hb
150-156 F7.3 0.1nm Fe5015 Lick Fe5015 index strength in Angstroms
158-164 F7.3 0.1nm e_Fe5015 Error in Fe5015
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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- 4 I4 --- Spec Spectrum identification number
6- 12 F7.3 mag Mg1 Lick Mg1 index strength
14- 20 F7.3 mag e_Mg1 Error in Mg1
22- 28 F7.3 mag Mg2 Lick Mg2 index strength
30- 36 F7.3 mag e_Mg2 Error in Mg2
38- 44 F7.3 0.1nm Mgb Lick Mgb index strength in Angstroms
46- 52 F7.3 0.1nm e_Mgb Error in Mgb
54- 60 F7.3 0.1nm Fe5270 Lick Fe5270 index strength in Angstroms
62- 68 F7.3 0.1nm e_Fe5270 Error in Fe5270
70- 76 F7.3 0.1nm Fe5335 Lick Fe5335 index strength in Angstroms
78- 84 F7.3 0.1nm e_Fe5335 Error in Fe5335
86- 92 F7.3 0.1nm Fe5406 Lick Fe5406 index strength in Angstroms
94-100 F7.3 0.1nm e_Fe5406 Error in Fe5406
102-108 F7.3 0.1nm Fe5709 Lick Fe5709 index strength in Angstroms
110-116 F7.3 0.1nm e_Fe5709 Error in Fe5709
118-124 F7.3 0.1nm Fe5782 Lick Fe5782 index strength in Angstroms
126-132 F7.3 0.1nm e_Fe5782 Error in Fe5782
134-140 F7.3 0.1nm NaD Lick NaD index strength in Angstroms
142-148 F7.3 0.1nm e_NaD Error in NaD
150-156 F7.3 0.1nm TiO1 Lick TiO1 index strength in Angstroms
158-164 F7.3 0.1nm e_TiO1 Error in TiO1
166-172 F7.3 0.1nm TiO2 Lick TiO2 index strength in Angstroms
174-180 F7.3 0.1nm e_TiO2 Error in TiO2
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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- 4 I4 --- Spec Spectrum identification number (1)
6- 12 F7.3 0.1nm HgF.a Additional HγF line strength in Å
14- 20 F7.3 0.1nm e_HgF.a Error in HgF.a
22- 28 F7.3 0.1nm Hb.a Additional Hβ line strength in Angstroms
30- 36 F7.3 0.1nm e_Hb.a Error in Hb.a
38- 44 F7.3 0.1nm Mgb.a Additional Mgb line strength in Angstroms
46- 52 F7.3 0.1nm e_Mgb.a Error in Mgb.a
54- 60 F7.3 0.1nm Fe5270.a Additional Fe5270 line strength in Angstroms
62- 68 F7.3 0.1nm e_Fe5270.a Error in Fe5270.a
70- 76 F7.3 0.1nm Fe5335.a Additional Fe5335 line strength in Angstroms
78- 84 F7.3 0.1nm e_Fe5335.a Error in Fe5335.a
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Note (1): These were measured from the composite spectra given in Table 1 after
convolving to Lick resolution.
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Byte-by-byte Description of file: table8.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- Spec Spectrum identification number
6- 9 F4.1 Gyr Age(Hb) Age (2) (1)
11- 14 F4.1 Gyr e_Age(Hb) Error in Age-Hb
16- 22 F7.3 [Sun] [Z/H](Hb) Log of the Z/H number abundance (2)
24- 30 F7.3 [Sun] e_[Z/H](Hb) Error in [Z/H]-Hb
32- 38 F7.3 [Sun] [a/Fe](Hb) Log of the α/Fe number abundance (2)
40- 46 F7.3 [Sun] e_[a/Fe](Hb) Error in [a/Fe]-Hb
48- 51 F4.1 Gyr Age(Hg) Age (3) (1)
53- 56 F4.1 Gyr e_Age(Hg) Error in Age-Hg
58- 64 F7.3 [Sun] [Z/H](Hg) Log of the Z/H number abundance (3)
66- 72 F7.3 [Sun] e_[Z/H](Hg) Error in [Z/H]-Hg
74- 80 F7.3 [Sun] [a/Fe](Hg) Log of the α/Fe number abundance (3)
82- 88 F7.3 [Sun] e_[a/Fe](Hg) Error in [a/Fe]-Hg
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Note (1): Objects with ages set to zero are those for which the models did not
return reliable estimates of age, [Z/H] and [α/Fe]. This can
be either because they lie beyond the model grids, or because the
three ways of estimating the ages gave vey different answers.
Note (2): Obtained using Hβ, Mgb, and <Fe>.
Note (3): Obtained using HγF, Mgb, and <Fe>.
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Marianne Brouty [CDS] 18-Jan-2007