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J/ApJS/116/1 Old Stellar Populations. VI. Absorption-Line (Trager+ 1998)
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Old Stellar Populations. VI. Absorption-Line Spectra of Galaxy Nuclei
and Globular Clusters
Trager S.C., Worthey G., Faber S.M., Burstein D., Gonzalez J.J.
<Astrophys. J. Suppl. Ser. 116, 1 (1998)>
=1998ApJS..116....1T
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ADC_Keywords: Galaxies, nearby; Spectroscopy; Populations, stellar
Description:
We present absorption-line strengths on the Lick/IDS line-strength
system of 381 galaxies and 38 globular clusters in the 4000--6400
angstrom region. All galaxies were observed at Lick Observatory
between 1972 and 1984 with the Cassegrain Image Dissector Scanner
spectrograph, making this study one of the largest homogeneous
collections of galaxy spectral line data to date. We also present a
catalogue of nuclear velocity dispersions used to correct the
absorption-line strengths onto the stellar Lick/IDS system. Extensive
discussion of both random and systematic errors of the Lick/IDS system
is provided. Indices are seen to fall into three families:
alpha-element-like indices (including CN, Mg, Na D, and TiO2) that
correlate positively with velocity dispersion; Fe-like indices
(including Ca, the G band, TiO1, and all Fe indices) that correlate
only weakly with velocity dispersion and the alpha indices; and Hbeta
which anti-correlates with both velocity dispersion and the alpha
indices. C2 4668 seems to be intermediate between the alpha and Fe
groups. These groupings probably represent different element
abundance families with different nucleosynthesis histories.
Introduction:
This data base includes line strengths for all galaxies and
globular clusters observed as well as 1-D FITS spectra of all
published stars, globular clusters, and galaxies observed in this
project. There are 957 galaxy and globular spectra and 1052
stellar spectra, which are catalogued in galcat.dat and
starcat.dat, respectively. Table 2 from Trager et al. 1998,
describing the absorption-line strength index system, is
presented in this file for completeness.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table4.dat 22 379 Velocity dispersions
table7.dat 360 370 Index strengths, nuclear obs. of galaxies
table8.dat 360 50 Index strengths for globular clusters
table9.dat 360 25 Index strengths, off-nuclear obs. of galaxies
table10.dat 367 151 Index strengths of galaxies,
non-standard apertures
galcat.dat 28 957 Catalogue of galaxy and globular cluster spectra
starcat.dat 90 1052 Catalogue of stellar spectra
gal/* . 957 Subdirectory containing FITS spectra of galcat
star/* . 1052 Subdirectory containing FITS spectra of starcat
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Table 2: Index Definitions
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Name Feature Bandpass Pseudocontinua Units Measures Error Notes
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01 CN 1 4142.125-4177.125 4080.125-4117.625 mag C,N,(O) 0.018 1,2
4244.125-4284.125
02 CN 2 4142.125-4177.125 4083.875-4096.375 mag C,N,(O) 0.019 1,2
4244.125-4284.125
03 Ca4227 4222.250-4234.750 4211.000-4219.750 Ang Ca,(C) 0.25 1
4241.000-4251.000
04 G4300 4281.375-4316.375 4266.375-4282.625 Ang C,(O) 0.33 1
4318.875-4335.125
05 Fe4383 4369.125-4420.375 4359.125-4370.375 Ang Fe,C,(Mg) 0.46 1
4442.875-4455.375
06 Ca4455 4452.125-4474.625 4445.875-4454.625 Ang (Fe),(C), 0.22 1
4477.125-4492.125 Cr
07 Fe4531 4514.250-4559.250 4504.250-4514.250 Ang Ti,(Si) 0.37 1
4560.500-4579.250
08 C2 46 4634.000-4720.250 4611.500-4630.250 Ang C,(O),(Si) 0.57 1,3
4742.750-4756.500
09 H bet 4847.875-4876.625 4827.875-4847.875 Ang Hbeta,(Mg) 0.19
4876.625-4891.625
10 Fe5015 4977.750-5054.000 4946.500-4977.750 Ang (Mg),Ti,Fe 0.41
5054.000-5065.250
11 Mg 1 5069.125-5134.125 4895.125-4957.625 mag C,Mg,(O), 0.006 3
5301.125-5366.125 Fe
12 Mg 2 5154.125-5196.625 4895.125-4957.625 mag Mg,C,(Fe), 0.007
5301.125-5366.125 (O)
13 Mg b 5160.125-5192.625 5142.625-5161.375 Ang Mg,(C), 0.20
5191.375-5206.375 (Cr)
14 Fe5270 5245.650-5285.650 5233.150-5248.150 Ang Fe,C,(Mg) 0.24
5285.650-5318.150
15 Fe5335 5312.125-5352.125 5304.625-5315.875 Ang Fe,(C), 0.22
5353.375-5363.375 (Mg),Cr
16 Fe5406 5387.500-5415.000 5376.250-5387.500 Ang Fe 0.18
5415.000-5425.000
17 Fe5709 5696.625-5720.375 5672.875-5696.625 Ang (C),Fe 0.16 1
5722.875-5736.625
18 Fe5782 5776.625-5796.625 5765.375-5775.375 Ang Cr 0.19 1
5797.875-5811.625
19 Na D 5876.875-5909.375 5860.625-5875.625 Ang Na,C,(Mg) 0.21 1
5922.125-5948.125
20 TiO 1 5936.625-5994.125 5816.625-5849.125 mag C 0.006 1,4
6038.625-6103.625
21 TiO 2 6189.625-6272.125 6066.625-6141.625 mag C,V,Sc 0.005 1,4
6372.625-6415.125
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Notes about table2:
(1) Wavelength definition has been refined.
(2) C, N are dominant as CN.
(3) C is dominant as C_2.
(4) TiO appears at M0 and cooler.
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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- 13 A13 --- ID Object name
14- 16 I3 km/s VelDisp ? Velocity dispersion
18- 20 I3 km/s e_VelDisp ? Uncertainty of velocity dispersion
22 I1 --- source *[1-8] Source of velocity dispersion
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Note on source:
Indicator Reference
1 Gonzalez, J. J. 1993, Ph. D. Thesis, UC Santa Cruz
2 Faber, S. M., et al. 1997, AJ, in press (1997AJ....114.1771F)
3 Faber, S. M., Wegner, G., Burstein, D., Davies, R. L.,
Dressler, A., Lynden-Bell, D. & Terlevich, R. J. 1989,
ApJS, 69, 763 (1989ApJS...69..763F; see Cat. <VII/176>)
4 Whitmore, B. C., McElroy, D. B. & Tonry, J. 1985, ApJS,
59, 1 (1985ApJS...59....1W; see Cat. <VII/72>)
5 Dalle Ore, C., Faber, S. M., Gonzalez, J. J., Stoughton,
R. & Burstein, D. 1991, ApJ, 366, 38 (1991ApJ...366...38D)
6 Bender, R., Paquet, A., Nieto, J.-L. (1991A&A...246..349B)
7 Peterson, R. C. & Caldwell, N. 1993AJ....105.1411P
8 This paper (eye estimates)
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Table 6: Mean measurement differences
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Eye-AUTOINDEX Published-AUTOINDEX
(Raw) (K giant standards)
J Index Galaxies All stars Paper V This paper
a a b c
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1 CN1 -0.002 -0.005 -0.007 -0.010
4 G4300 -0.02 0.01 -0.29 -0.21
9 Hbeta -0.01 -0.02 -0.05 -0.03
11 Mg1 -0.001 -0.001 -0.007 -0.007
12 Mg2 0.003 0.000 -0.001 -0.002
13 Mg b 0.00 -0.04 -0.05 -0.01
14 Fe5270 0.00 -0.04 -0.04 -0.02
15 Fe5335 -0.04 -0.04 -0.10 -0.10
19 NaD -0.04 0.00 0.03 0.06
20 TiO_1_ -0.001 -0.001 0.001 0.001
21 TiO_2_ -0.001 -0.001 0.000 0.000
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a: Eye - AUTOINDEX raw values; run corrections and velocity-dispersion
corrections have not been applied.
b: Correction onto Lick/IDS system as determined for Paper V (1994,
Cat. <J/ApJS/94/687> and applied to AUTOINDEX measurements of stars there.
Based on nine K giant standard stars.
c: Repeat analysis of Paper V (<J/ApJS/94/687>) corrections based on same nine
K giant standard stars. Values applied to all galaxies and globular
clusters in this paper.
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Byte-by-byte Description of file: table7.dat, table8.dat, table9.dat
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Bytes Format Units Label Explanations
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1- 15 A15 --- ID Object name and distance from nucleus
(if necessary)
16- 21 I6 --- G ? Total goodness
22- 24 I3 --- N ? Number of observations
25- 32 F8.4 mag CN1 ? CN1 index strength
33- 40 F8.4 mag e_CN1 ? Uncertainty of CN1 index strength
41- 48 F8.4 mag CN2 ? CN2 index strength
49- 56 F8.4 mag e_CN2 ? Uncertainty of CN2 index strength
57- 64 F8.4 0.1nm Ca4227 ? Ca4227 index strength
65- 72 F8.4 0.1nm e_Ca4227 ? Uncertainty of Ca4227 index strength
73- 80 F8.4 0.1nm G4300 ? G4300 index strength
81- 88 F8.4 0.1nm e_G4300 ? Uncertainty of G4300 index strength
89- 96 F8.4 0.1nm Fe4383 ? Fe4383 index strength
97-104 F8.4 0.1nm e_Fe4383 ? Uncertainty of Fe4383 index strength
105-112 F8.4 0.1nm Ca4455 ? Ca4455 index
113-120 F8.4 0.1nm e_Ca4455 ? Uncertainty of Ca4455 index strength
121-128 F8.4 0.1nm Fe4531 ? Fe4531 index
129-136 F8.4 0.1nm e_Fe4531 ? Uncertainty of Fe4531 index strength
137-144 F8.4 0.1nm C24668 ? C24668 index
145-152 F8.4 0.1nm e_C24668 ? Uncertainty of C24668 index strength
153-160 F8.4 0.1nm Hbeta ? Hbeta index
161-168 F8.4 0.1nm e_Hbeta ? Uncertainty of Hbeta index strength
169-176 F8.4 0.1nm Fe5015 ? Fe5015 index
177-184 F8.4 0.1nm e_Fe5015 ? Uncertainty of Fe5015 index strength
185-192 F8.4 mag Mg1 ? Mg1 index strength
193-200 F8.4 mag e_Mg1 ? Uncertainty of Mg1 index strength
201-208 F8.4 mag Mg2 ? Mg2 index strength
209-216 F8.4 mag e_Mg2 ? Uncertainty of Mg2 index strength
217-224 F8.4 0.1nm Mgb ? Mg b index
225-232 F8.4 0.1nm e_Mgb ? Uncertainty of Mg b index strength
233-240 F8.4 0.1nm Fe5270 ? Fe5270 index
241-248 F8.4 0.1nm e_Fe5270 ? Uncertainty of Fe5270 index strength
249-256 F8.4 0.1nm Fe5335 ? Fe5335 index
257-264 F8.4 0.1nm e_Fe5335 ? Uncertainty of Fe5335 index strength
265-272 F8.4 0.1nm Fe5406 ? Fe5406 index
273-280 F8.4 0.1nm e_Fe5406 ? Uncertainty of Fe5406 index strength
281-288 F8.4 0.1nm Fe5709 ? Fe5709 index
289-296 F8.4 0.1nm e_Fe5709 ? Uncertainty of Fe5709 index strength
297-304 F8.4 0.1nm Fe5782 ? Fe5782 index
305-312 F8.4 0.1nm e_Fe5782 ? Uncertainty of Fe5782 index strength
313-320 F8.4 0.1nm NaD ? Na D index
321-328 F8.4 0.1nm e_NaD ? Uncertainty of Na D index strength
329-336 F8.4 mag TiO1 ? TiO1 index strength
337-344 F8.4 mag e_TiO1 ? Uncertainty of TiO1 index strength
345-352 F8.4 mag TiO2 ? TiO2 index strength
353-360 F8.4 mag e_TiO2 ? Uncertainty of TiO2 index strength
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Notes about table7:
This table gives nuclear observations of galaxies through the standard
slitsize 1.4" by 4".
A 569 A: Member of galaxy cluster Abell 569. The wrong coordinates
were given in Faber et al. (1989ApJS...69..763F). The proper
coordinates are 07h 04m 06.6s, +48d 43m 34s.
IC 1907: Called CR 32 in Faber et al. (1989ApJS...69..763F).
Notes about table8:
The observations tabulated here are described in Burstein et al.
(1984ApJ...287..586B); names are explained there. M31 globular
clusters were observed with the standard aperture (1.4" x 4"). The
Milky Way globular clusters were observed with a long slit of standard
width (1.4" x 16") that was raster-scanned on the sky to create a
square aperture of size 66" x 66". This resulted in two square
apertures, one centered on the cluster and one for the ``off'' beam
located 35" to the east. On large clusters, the ``off'' beam was also
reduced and is denoted here by ``O''. For NGC 6624, the L aperture is
45" by 60" and the S aperture is 13" by 13"; both are centered on the
cluster. Raster scans have the same spectral resolution as
standard-slitwidth scans (1.4").
Notes about table9:
This table gives off-nuclear observations of galaxies through the
standard slitwidth (1.4" x 4"). The name consists of the NGC number
followed by an offset or a position. The offsets are indicated by a
number (the offset in arcseconds from the nucleus) followed by a
two-letter code: ``ew'' means that the offset is along the east-west
line; ``ns'' is along the north-south line; ``mj'' is along the major
axis; ``mn'' is along the minor axis. Signs are not given because the
data are sometimes averaged about the nucleus. A position code x,y
denotes an offset along the major axis by the amount x and an offset
along the minor axis by the amount y. These are likewise not signed
for the same reason.
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Byte-by-byte Description of file: table10.dat
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Bytes Format Units Label Explanations
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1- 15 A15 --- ID Object name and distance from nucleus
(if necessary)
16- 21 I6 --- G ? Total goodness
22- 24 I3 --- N ? Number of observations
25- 28 F4.1 arcsec width ? slit width
29- 31 I3 arcsec length ? slit length
32- 39 F8.4 mag CN1 ? CN1 index strength
40- 47 F8.4 mag e_CN1 ? Uncertainty of CN1 index strength
48- 55 F8.4 mag CN2 ? CN2 index strength
56- 63 F8.4 mag e_CN2 ? Uncertainty of CN2 index strength
64- 71 F8.4 0.1nm Ca4227 ? Ca4227 index strength
72- 79 F8.4 0.1nm e_Ca4227 ? Uncertainty of Ca4227 index strength
80- 87 F8.4 0.1nm G4300 ? G4300 index strength
88- 95 F8.4 0.1nm e_G4300 ? Uncertainty of G4300 index strength
96-103 F8.4 0.1nm Fe4383 ? Fe4383 index strength
104-111 F8.4 0.1nm e_Fe4383 ? Uncertainty of Fe4383 index strength
112-119 F8.4 0.1nm Ca4455 ? Ca4455 index
120-127 F8.4 0.1nm e_Ca4455 ? Uncertainty of Ca4455 index strength
128-135 F8.4 0.1nm Fe4531 ? Fe4531 index
136-143 F8.4 0.1nm e_Fe4531 ? Uncertainty of Fe4531 index strength
144-151 F8.4 0.1nm C24668 ? C24668 index
152-159 F8.4 0.1nm e_C24668 ? Uncertainty of C24668 index strength
160-167 F8.4 0.1nm Hbeta ? Hbeta index
168-175 F8.4 0.1nm e_Hbeta ? Uncertainty of Hbeta index strength
176-183 F8.4 0.1nm Fe5015 ? Fe5015 index
184-191 F8.4 0.1nm e_Fe5015 ? Uncertainty of Fe5015 index strength
192-199 F8.4 mag Mg1 ? Mg1 index strength
200-207 F8.4 mag e_Mg1 ? Uncertainty of Mg1 index strength
208-215 F8.4 mag Mg2 ? Mg2 index strength
216-223 F8.4 mag e_Mg2 ? Uncertainty of Mg2 index strength
224-231 F8.4 0.1nm Mgb ? Mg b index
232-239 F8.4 0.1nm e_Mgb ? Uncertainty of Mg b index strength
240-247 F8.4 0.1nm Fe5270 ? Fe5270 index
248-255 F8.4 0.1nm e_Fe5270 ? Uncertainty of Fe5270 index strength
256-263 F8.4 0.1nm Fe5335 ? Fe5335 index
264-271 F8.4 0.1nm e_Fe5335 ? Uncertainty of Fe5335 index strength
272-279 F8.4 0.1nm Fe5406 ? Fe5406 index
280-287 F8.4 0.1nm e_Fe5406 ? Uncertainty of Fe5406 index strength
288-295 F8.4 0.1nm Fe5709 ? Fe5709 index
296-303 F8.4 0.1nm e_Fe5709 ? Uncertainty of Fe5709 index strength
304-311 F8.4 0.1nm Fe5782 ? Fe5782 index
312-319 F8.4 0.1nm e_Fe5782 ? Uncertainty of Fe5782 index strength
320-327 F8.4 0.1nm NaD ? Na D index
328-335 F8.4 0.1nm e_NaD ? Uncertainty of Na D index strength
336-343 F8.4 mag TiO1 ? TiO1 index strength
344-351 F8.4 mag e_TiO1 ? Uncertainty of TiO1 index strength
352-359 F8.4 mag TiO2 ? TiO2 index strength
360-367 F8.4 mag e_TiO2 ? Uncertainty of TiO2 index strength
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Notes about table10:
This table contains all observations of galaxies (plus two M31
globular clusters) made through non-standard apertures (raster scans
of Milky Way globular clusters are given in Table 8). Slitwidth and
length are given in the third column. A slitwidth of "9.99" denotes a
raster scan made with a 1.4" x 16" slit covering a square aperture 16"
x 16" centered on the nucleus. These scans resemble the larger raster
scans of globulars in Table 7 and have the same spectral resolution as
standard-slitwidth scans (1.4"). They were taken to determine the
aperture correction to nuclear velocity dispersions (see Davies et al.
1987ApJS...64..581D).
The naming convention for off-nuclear locations in this table is the
same as in Table 9. Special names are:
M31 V29 and M31 V92: Two M31 globular clusters observed with a wide
slit. See notes on Table 7 for further information.
NGC 3379 61se: Aperture located 61" south-east of the nucleus.
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Byte-by-byte Description of file: galcat.dat
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Bytes Format Units Label Explanations
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1- 12 A12 --- SpFile FITS spectrum file name in subdirectory gal
14- 28 A15 --- ID Galaxy name
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Byte-by-byte Description of file: starcat.dat
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Bytes Format Units Label Explanations
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1- 12 A12 --- SpFile FITS spectrum file name in subdirectory star
14- 15 I2 h RAh ?Right Ascension J2000 (hours)
16- 17 I2 min RAm ?Right Ascension J2000 (minutes)
18- 21 F4.1 s RAs ?Right Ascension J2000 (seconds)
22 A1 --- DE- ?Declination J2000 (sign)
23- 24 I2 deg DEd ?Declination J2000 (degrees)
25- 26 I2 arcmin DEm ?Declination J2000 (minutes)
27- 28 I2 arcsec DEs ?Declination J2000 (seconds)
30- 35 A6 --- HR HR catalogue <V/50> name
37- 44 A8 --- HD HD catalogue <III/135> name
46- 56 A11 --- DM DM catalogue <I/108> <I/114> <I/119> <I/122>
58- 73 A16 --- Name1 Alternative name 1
75- 82 A8 --- Name2 Alternative name 2
84- 90 A7 --- Name3 Alternative name 3
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(End) Scott Trager [Carnegie Obs.], Gail Schneider [ADC/SSDOO] 04-Jun-1998