2003AJ....125.2891C

Query : 2003AJ....125.2891C

2003AJ....125.2891C - Astron. J., 125, 2891-2926 (2003/June-0)

Star formation histories of early-type galaxies. I. Higher order Balmer lines as age indicators.

CALDWELL N., ROSE J.A. and CONCANNON K.D.

Abstract (from CDS):

We have obtained blue integrated spectra of 175 nearby early-type galaxies, covering a wide range in galaxy velocity dispersion and emphasizing those with σ<100 km.s–1. Galaxies have been observed both in the Virgo Cluster and in lower density environments. The main goals are the evaluation of higher order Balmer lines as age indicators and differences in stellar populations as a function of mass, environment, and morphology. In this first paper, our emphasis is on presenting the methods used to characterize the behavior of the Balmer lines through evolutionary population synthesis models. Lower σ galaxies exhibit a substantially greater intrinsic scatter, in a variety of line-strength indicators, than do higher σ galaxies, with the large intrinsic scatter setting in below a σ of 100 km.s–1. Moreover, a greater contrast in scatter is present in the Balmer lines than in the lines of metal features. Evolutionary synthesis modeling of the observed spectral indexes indicates that the strong Balmer lines found primarily among the low-σ galaxies are caused by young age, rather than by low metallicity. Thus we find a trend between the population age and the central velocity dispersion, such that low-σ galaxies have younger luminosity-weighted mean ages. We have repeated this analysis using several different Balmer lines and find consistent results from one spectral indicator to another.

Abstract Copyright: ∼

Journal keyword(s): Galaxies: Abundances - Galaxies: Stellar Content

Simbad objects: 180

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Number of rows : 180
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NGC 104 GlC 00 24 05.359 -72 04 53.20     4.09     ~ 4158 0
2 NGC 183 GiG 00 38 29.3903442696 +29 30 40.096025424   13.8       ~ 45 0
3 Z 479-55 GiG 00 39 29.5903963776 +25 38 36.048567804   14.5       ~ 30 0
4 M 110 GiG 00 40 22.0572349992 +41 41 07.507220136   8.92 8.07     ~ 1370 1
5 M 32 GiG 00 42 41.82480 +40 51 54.6120 9.51 9.03 8.08     ~ 2236 2
6 NGC 311 GiG 00 57 32.7230472384 +30 16 50.654332632 14.57 14.00 13.00     ~ 56 1
7 NGC 380 GiG 01 07 17.6009811624 +32 28 58.449364788   13.9       ~ 87 1
8 NGC 384 GiG 01 07 25.0135015920 +32 17 33.865906848   14.3       ~ 92 1
9 NGC 448 EmG 01 15 16.5193587096 -01 37 34.484096784   13.2       ~ 112 0
10 NGC 474 GiP 01 20 06.6870520512 +03 24 55.861973100 12.75 12.37 11.51 11.42 10.56 ~ 371 1
11 NGC 502 GiG 01 22 55.5578695992 +09 02 57.040303668   13.8       ~ 91 0
12 NGC 516 GiP 01 24 08.0801760720 +09 33 06.397815780   14.3       ~ 85 0
13 NGC 525 AG? 01 24 52.9229678784 +09 42 12.149984916   14.50       ~ 68 0
14 NGC 584 Sy2 01 31 20.7231919800 -06 52 04.770287472 11.93 11.44 10.48     ~ 417 2
15 NGC 636 EmG 01 39 06.5293238064 -07 30 45.475975296   12.5       ~ 196 0
16 NGC 656 AG? 01 42 27.2530437960 +26 08 34.971347724   13.50       ~ 48 0
17 NGC 770 GiP 01 59 13.6426514184 +18 57 16.714843308   13.91 13.49     ~ 111 1
18 NGC 774 LIN 01 59 34.7353817064 +14 00 29.546396964   13.97       ~ 85 1
19 IC 195 GiP 02 03 44.6075361096 +14 42 33.441262236   14.3       ~ 70 0
20 NGC 821 AG? 02 08 21.1358498040 +10 59 41.832436704   12.210 11.310 10.739 9.744 ~ 592 0
21 NGC 938 GiG 02 28 33.5195261688 +20 17 01.358927304   13.8       ~ 58 0
22 NGC 990 GiG 02 36 18.206 +11 38 31.57   13.9       ~ 47 0
23 NGC 1026 AG? 02 39 19.2009213936 +06 32 38.531603472   14.1       ~ 41 0
24 NGC 1029 GiP 02 39 36.5358324432 +10 47 35.712677904   14.20 13.11 12.47 11.52 ~ 50 0
25 NGC 1107 AG? 02 49 19.5973326936 +08 05 33.778409316   14.1       ~ 36 0
26 NGC 1153 AG? 02 58 10.3205584152 +03 21 43.041632292   13.5       ~ 40 0
27 NGC 1211 AG? 03 06 52.4204985720 -00 47 40.073141400   13.3   13.2 12.6 ~ 88 0
28 NGC 1298 GiG 03 20 13.0777329888 -02 06 50.671674648   14.2       ~ 50 1
29 NGC 1550 BiC 04 19 37.9450450152 +02 24 35.918168940   14.0       ~ 183 1
30 NGC 1552 Sy2 04 20 17.6749703952 -00 41 33.814343940   14.4       ~ 41 1
31 NGC 2332 Bla 07 09 34.2024453394 +50 10 56.260580107   14.0   8.2   ~ 56 1
32 IC 2382 LIN 08 28 46.1177925264 +22 03 12.522544344   14.9       ~ 21 0
33 NGC 2693 GiG 08 56 59.2620417624 +51 20 50.738224092 13.45 12.84 11.88     ~ 137 1
34 NGC 2778 GiP 09 12 24.3741783168 +35 01 39.140496840   13.1       ~ 303 0
35 NGC 2880 GiG 09 29 34.5699581472 +62 29 26.020090572   12.6       ~ 166 0
36 NGC 2918 GiG 09 35 44.0389725240 +31 42 19.742708448   13.6       ~ 66 0
37 NGC 2954 LIN 09 40 24.0911388408 +14 55 21.532972188   13.50       ~ 70 0
38 IC 555 GiG 09 41 56.8907047800 +12 17 46.580080452   14.4       ~ 35 0
39 NGC 2950 AG? 09 42 35.1484995048 +58 51 04.584956904   11.8       ~ 223 0
40 NGC 3071 AG? 09 58 52.9914303864 +31 37 13.127629224   15.4       ~ 23 0
41 NGC 3102 GiG 10 04 31.7648115648 +60 06 28.610881308   14.30       ~ 52 0
42 Z 290-8 GiG 10 05 59.9914143792 +58 48 43.947429912   13.6       ~ 28 0
43 NGC 3156 GiG 10 12 41.2457368824 +03 07 45.701284764   12.8       ~ 241 0
44 IC 598 LIN 10 12 48.5669270904 +43 08 43.971776304   13.8       ~ 62 0
45 NGC 3193 GiP 10 18 24.884 +21 53 38.32 12.29 11.83 10.88 12.19   ~ 301 1
46 NGC 3248 GiG 10 27 45.4389454896 +22 50 49.805614320   13.9       ~ 83 0
47 NGC 3266 GiG 10 33 17.6098160184 +64 44 57.720597360   13.5       ~ 68 0
48 NGC 3489 GiG 11 00 18.5483994744 +13 54 04.206202668 11.46 11.12 10.29     ~ 429 1
49 NGC 3524 GiP 11 06 32.1025569504 +11 23 07.539947340   13.4       ~ 45 0
50 NGC 3599 GiP 11 15 26.9494646448 +18 06 37.428503940   13.0       ~ 226 0
51 NGC 3648 GiG 11 22 31.5070422432 +39 52 36.753613320   13.57 12.64     ~ 84 0
52 NGC 3731 LIN 11 34 11.6735853360 +12 30 44.367759108   14.3       ~ 41 0
53 NGC 3757 GiG 11 37 02.8650138288 +58 24 55.817369748   13.5       ~ 87 0
54 NGC 3795B SyG 11 38 08.5586485752 +58 45 29.772328032   14.0       ~ 38 0
55 NGC 3818 EmG 11 41 57.3563891040 -06 09 20.459153376   13   11.78   ~ 186 0
56 NGC 3872 GiP 11 45 49.069 +13 46 00.07   12.9       ~ 96 0
57 NGC 4168 Sy2 12 12 17.2692381408 +13 12 18.688208724 12.58 12.11 11.18     ~ 393 1
58 IC 3065 GiG 12 15 12.5592175920 +14 25 58.469336508   14.7       ~ 109 0
59 IC 3100 LSB 12 17 05.5511674632 +12 17 23.435069208   15.3       ~ 51 0
60 NGC 4261 LIN 12 19 23.2160630 +05 49 29.700024   13.92 12.87     ~ 1290 0
61 IC 781 GiG 12 20 03.2942086416 +14 57 41.415572916   14.8       ~ 72 0
62 NGC 4283 GiG 12 20 20.7691223880 +29 18 39.154727556 13.47 13.00 12.07     ~ 209 1
63 NGC 4296 GiP 12 21 28.3883301288 +06 39 12.835655460   14.0       ~ 54 0
64 NGC 4308 GiG 12 21 56.8514262840 +30 04 27.609537504   14.3       ~ 90 0
65 NGC 4306 GiP 12 22 04.087 +12 47 13.96   14.4       ~ 113 0
66 NGC 4309A GiP 12 22 14.7398629440 +07 10 01.648488468           ~ 70 0
67 NGC 4328 GiG 12 23 20.0385680184 +15 49 13.327474224   14.04       ~ 96 1
68 NGC 4350 GiP 12 23 57.814 +16 41 36.08   11.5 11.08     ~ 331 0
69 NGC 4352 GiG 12 24 05.0220445416 +11 13 05.086056576   14.0       ~ 174 0
70 NGC 4365 GiG 12 24 28.228 +07 19 03.07   11.5       ~ 871 0
71 IC 3292 GiG 12 24 48.3555488664 +18 11 42.410950008   15.5       ~ 90 0
72 NGC 4370 GiG 12 24 54.932 +07 26 40.44 16.09 15.59 13.84     ~ 148 0
73 NGC 4379 GiG 12 25 14.7458757864 +15 36 26.755074576 13.05 12.63 11.72     ~ 239 1
74 IC 3303 GiG 12 25 15.1991817360 +12 42 52.784461080   15.1 14.24   13.29 ~ 80 0
75 NGC 4387 GiG 12 25 41.6768484264 +12 48 37.804615956 13.42 13.01 12.12   10.87 ~ 409 1
76 IC 3328 GiP 12 25 57.9238048368 +10 03 13.552350912   14.9       ~ 172 0
77 NGC 4415 GiG 12 26 40.4842511880 +08 26 08.595255480   14.2       ~ 120 0
78 NGC 4417 GiP 12 26 50.6084412168 +09 35 03.354168804   12.2       ~ 268 0
79 NGC 4421 GiG 12 27 02.5337064504 +15 27 41.371676640 12.81 12.47 11.60     ~ 120 1
80 NGC 4431 GiP 12 27 27.3817521552 +12 17 25.041554808 14.17 13.74 12.89     ~ 171 2
81 NGC 4434 GiG 12 27 36.6771662112 +08 09 15.640206876   13.2       ~ 275 0
82 NGC 4435 GiG 12 27 40.503 +13 04 44.48 12.23 11.74 10.80     ~ 474 2
83 NGC 4436 GiP 12 27 41.2343736168 +12 18 57.193481304 14.20 13.91 12.98     ~ 138 1
84 NGC 4442 GiG 12 28 03.8815318272 +09 48 13.426522272   11.2       ~ 298 0
85 IC 794 GiG 12 28 08.6096744256 +12 05 35.874205512   14.07 13.44   12.39 ~ 121 1
86 NGC 4452 GiG 12 28 43.2980346552 +11 45 18.201826692 13.27 12.87 11.98     ~ 215 1
87 NGC 4458 GiP 12 28 57.5613938232 +13 14 30.946545276 13.27 12.93 12.07     ~ 429 2
88 NGC 4464 GiG 12 29 21.2937802368 +08 09 23.807609316   13.5       ~ 242 0
89 IC 3413 GiG 12 29 22.5171098280 +11 26 01.955382504   15.2       ~ 82 0
90 LEDA 41180 AG? 12 29 34.9891966080 +08 03 28.781563608           ~ 91 0
91 NGC 4473 GiG 12 29 48.878 +13 25 45.55 11.60 11.16 10.20     ~ 671 1
92 NGC 4474 GiG 12 29 53.5396737408 +14 04 06.881708604   12.6       ~ 278 0
93 NGC 4476 GiG 12 29 59.0772974472 +12 20 55.292203464 13.28 13.01 12.19     ~ 340 1
94 NGC 4478 GiP 12 30 17.4160005576 +12 19 42.790577160 12.82 12.36 11.45   10.17 ~ 508 1
95 NGC 4479 GiG 12 30 18.3716396496 +13 34 39.522722196 13.73 13.40 12.44     ~ 197 2
96 NGC 4486B GiG 12 30 31.985 +12 29 24.85   14.5       ~ 428 0
97 NGC 4483 GiG 12 30 40.6442816856 +09 00 56.391019596   13.4       ~ 179 0
98 NAME Virgo Cluster ClG 12 30 47.8 +12 23 07           ~ 7107 0
99 NGC 4488 GiG 12 30 51.3727669680 +08 21 35.998048692   13.8       ~ 101 0
100 NGC 4489 GiG 12 30 52.2472748976 +16 45 31.866359004   13.2       ~ 264 0
101 IC 3468 GiG 12 32 14.2119323256 +10 15 05.173970472   14.6       ~ 148 0
102 IC 798 GiG 12 32 33.4026417888 +15 24 55.432700280   15.3       ~ 108 0
103 NGC 4515 GiG 12 33 04.9652329656 +16 15 55.889535096   13.3       ~ 157 0
104 NGC 4516 GiG 12 33 07.5371910504 +14 34 29.746318476   13.9       ~ 90 0
105 IC 3487 GiG 12 33 13.601 +09 23 49.76   15.1       ~ 85 0
106 IC 3499 GiG 12 33 44.9919553104 +10 59 44.614881240   14.5       ~ 70 0
107 NGC 4526 GiC 12 34 03.02853 +07 41 56.9040   10.6       ~ 707 0
108 NGC 4528 GiG 12 34 06.0685723920 +11 19 16.528093428 13.39 12.97 12.06     ~ 201 1
109 IC 3509 GiG 12 34 11.5324571232 +12 02 56.163023196   15.3       ~ 125 0
110 IC 3540 GiC 12 35 27.2277280584 +12 45 00.945699012   14.8       ~ 68 0
111 NGC 4551 GiP 12 35 37.9542692328 +12 15 50.284593432 13.49 12.97 12.02     ~ 371 1
112 NGC 4598 GiG 12 40 11.9356455312 +08 23 01.483673064   14.1       ~ 70 0
113 IC 3653 GiG 12 41 15.7273825296 +11 23 13.997694300   14.7       ~ 122 0
114 NGC 4648 GiG 12 41 44.3891511144 +74 25 15.700353240   12.6       ~ 125 0
115 M 59 GiG 12 42 02.2581375168 +11 38 48.909507756   11.0       ~ 721 0
116 IC 810 GiG 12 42 09.0797376720 +12 35 48.515221536   14.7     12.2 ~ 60 0
117 NGC 4638 GiP 12 42 47.4239240016 +11 26 32.970950556   12.2 11.23     ~ 295 1
118 NAME NGC 4636 Group GrG 12 42 49.5 +02 41 08           ~ 570 0
119 NGC 4636 LIN 12 42 49.8333280080 +02 41 15.951929028   12.62 11.84     ~ 1156 1
120 NGC 4660 GiP 12 44 31.9814021280 +11 11 25.739106972   12.1       ~ 434 0
121 IC 3773 GiG 12 47 15.2968038432 +10 12 12.944157012   14.3       ~ 142 0
122 NGC 5342 GiG 13 51 25.898 +59 51 46.85   14.4       ~ 68 0
123 NGC 5370 LIN 13 54 09.3709053024 +60 40 40.949916888   14.3       ~ 58 0
124 Z 246-28 GiG 13 56 58.0631953080 +45 58 23.672587944   14.3       ~ 66 0
125 NGC 5422 GiG 14 00 42.0190513968 +55 09 51.863031684   13.1       ~ 164 0
126 NGC 5424 GiG 14 02 55.7022079632 +09 25 14.475840672   14.3       ~ 79 1
127 NGC 5459 AG? 14 05 00.1861428336 +13 07 54.829119900   14.5       ~ 41 0
128 NGC 5481 AG? 14 06 41.2682134344 +50 43 23.823257124   13.5       ~ 136 0
129 NGC 5500 GiG 14 10 15.2332280184 +48 32 46.013176572   14.5       ~ 72 0
130 NGC 5582 GiP 14 20 43.1108121696 +39 41 36.927369816   13.0       ~ 128 0
131 NGC 5576 GiP 14 21 03.691 +03 16 15.78 12.25 11.85 10.96     ~ 347 1
132 NGC 5590 GiG 14 21 38.4096020760 +35 12 17.499866256   13.6       ~ 59 1
133 NGC 5596 Sy2 14 22 28.7352964296 +37 07 19.885639836   14.5       ~ 69 0
134 NGC 5603 LIN 14 23 01.5271319064 +40 22 38.684070588   14.0       ~ 49 1
135 NGC 5611 AG? 14 24 04.7758256208 +33 02 50.707920444   13.5       ~ 94 0
136 NGC 5631 Sy2 14 26 33.2913328320 +56 34 57.424681848   13.51 12.55     ~ 204 0
137 NGC 5623 rG 14 27 08.6649857774 +33 15 08.993540267   13.53 12.53 12.86 12.16 ~ 55 1
138 NGC 5629 GiG 14 28 16.3720374384 +25 50 55.459877604   14.2       ~ 78 0
139 NGC 5644 GiG 14 30 25.5804273288 +11 55 40.778045760   14.1       ~ 35 0
140 Z 192-59 AG? 14 46 21.127 +34 22 14.34   14.4       ~ 103 0
141 NGC 5770 GiG 14 53 15.0128865696 +03 57 35.024994900 13.49 13.15 12.26     ~ 109 1
142 NGC 5813 LIN 15 01 11.2302420864 +01 42 07.141569696 12.00 11.45 10.46 10.06   ~ 673 2
143 NGC 5831 GiG 15 04 07.0002600408 +01 13 11.705607012   13.1   11.19   ~ 304 0
144 NGC 5845 GiG 15 06 00.7823239488 +01 38 01.704838596   13.8 11.20 12.06 9.94 ~ 403 0
145 NGC 5865 GiP 15 09 49.4195561280 +00 28 12.385857792   13.5       ~ 99 0
146 NGC 5966 LIN 15 35 52.1114846664 +39 46 08.023434852   13.9       ~ 81 0
147 NGC 5982 LIN 15 38 39.778 +59 21 21.21   12.4       ~ 302 0
148 NGC 6003 GiG 15 49 25.6424078208 +19 01 55.476683436   14.4       ~ 44 0
149 IC 1153 LIN 15 57 03.0027166560 +48 10 06.149934372   13.6       ~ 55 0
150 Z 319-36 GiG 15 57 07.8313234224 +63 55 02.983011960   13.9       ~ 27 0
151 NGC 6017 AG? 15 57 15.4406348832 +05 59 54.256163604   13.8       ~ 75 0
152 Z 250-30 GiG 15 58 40.2287387232 +48 40 56.693834040   14.3       ~ 34 0
153 NGC 6030 GiG 16 01 51.4174712664 +17 57 26.915090976   14.5       ~ 43 0
154 Z 108-150 GiG 16 06 42.0913690032 +16 19 10.605201636   14.3       ~ 39 0
155 IC 1211 AG? 16 16 51.9794910072 +53 00 21.703117284   13.80       ~ 60 0
156 NGC 6125 AG? 16 19 11.5344941208 +57 59 02.863041504   13.0       ~ 106 0
157 NGC 6126 GiG 16 21 27.9256198560 +36 22 35.826504132   14.5       ~ 33 0
158 NGC 6137 rG 16 23 03.1194649896 +37 55 20.550626868   14.1       ~ 130 1
159 NGC 7194 GiG 22 03 30.9364457736 +12 38 12.415007364   14.5       ~ 63 0
160 NGC 7280 GiP 22 26 27.5758899936 +16 08 53.421593496   13.6       ~ 169 0
161 NGC 7391 EmG 22 50 36.1354224576 -01 32 41.420188356   13.7       ~ 69 0
162 NGC 7411 G 22 54 34.9180471368 +20 14 10.353168420   14.8       ~ 17 0
163 NGC 7454 GiG 23 01 06.5120307216 +16 23 18.484008792   13.6       ~ 157 0
164 NGC 7461 AG? 23 01 48.3342056808 +15 34 57.265786776   14.5       ~ 49 0
165 UGC 12454 GrG 23 15 09.25 +09 40 45.8   15.0       ~ 15 0
166 NGC 7557 GiP 23 15 39.7623297912 +06 42 29.924345880   15.0       ~ 43 0
167 NGC 7569 AG? 23 16 44.5361951424 +08 54 20.317228488   14.8       ~ 33 0
168 NGC 7611 GiG 23 19 36.5915702280 +08 03 48.102500664   14.0       ~ 77 0
169 NGC 7612 GiG 23 19 44.2115813880 +08 34 34.873328280   14.3       ~ 56 0
170 Z 476-7 GiG 23 19 51.18 +26 15 45.6   14.1       ~ 14 0
171 NAME Peg Cluster ClG 23 20 14.7 +08 12 23           ~ 131 0
172 NGC 7623 GiG 23 20 30.0039351816 +08 23 44.814596208   13.9       ~ 88 0
173 NGC 7628 GiG 23 20 54.8892466368 +25 53 54.897931680   13.8       ~ 32 0
174 NGC 7671 GiP 23 27 19.3401587400 +12 28 02.728494624   14.3       ~ 71 0
175 Z 497-36 GiG 23 32 43.4912105376 +29 27 38.433171780   14.5       ~ 30 0
176 NGC 7698 G 23 34 01.5623037528 +24 56 40.699353732   14.5       ~ 27 0
177 NGC 7703 GiG 23 34 46.8800843088 +16 04 32.585386764   14.8       ~ 34 0
178 NGC 7707 AG? 23 34 51.3974652960 +44 18 14.569087500   14.8       ~ 17 0
179 NGC 7711 GiG 23 35 39.3728741856 +15 18 07.098903144   14.0       ~ 79 0
180 NAME Local Group GrG ~ ~           ~ 9325 0

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