2000AJ....120..131M

Query : 2000AJ....120..131M

2000AJ....120..131M - Astron. J., 120, 131-138 (2000/July-0)

The ratio of α-elements to iron in early-type galaxies from TiO and Mg2.

MILONE A., BARBUY B. and SCHIAVON R.P.

Abstract (from CDS):

In order to derive the ratio of α-elements to iron in galaxies, we have observed the strongest TiO band heads of the γ and γ' systems at 7000-7500 Å in a sample of a dozen early-type galaxies. The equivalent widths of the TiO bands are compared with synthetic spectra for single-aged stellar populations and composite galaxy models, all computed with [α/Fe]=0.0 and +0.3. The same method is also applied to the <Fe> and Mg2 Lick indices for the sample galaxies. The results obtained are [Ti/Fe]~[Mg/Fe]~+0.3, indicating a clear enhancement of the α-elements-to-iron ratio for our sample of early-type galaxies.

Abstract Copyright: ∼

Journal keyword(s): Galaxies: Abundances - Galaxies: Elliptical and Lenticular, cD - Galaxies: Stellar Content

Simbad objects: 17

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Number of rows : 17
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 3115 GiG 10 05 13.9270507008 -07 43 06.982712292   11   9.37   ~ 1067 2
2 NGC 3136 GiG 10 05 48.0247938960 -67 22 40.395096300   11.60 11.00 10.05   ~ 101 0
3 NGC 3904 GiG 11 49 13.206 -29 16 36.09   11.82 10.96 10.29   ~ 162 0
4 NGC 3923 GiG 11 51 01.783 -28 48 22.36 11.41 10.59 9.80 8.88   ~ 459 1
5 M 87 AGN 12 30 49.42338414 +12 23 28.0436859 10.16 9.59 8.63   7.49 ~ 7815 3
6 M 60 GiC 12 43 39.9708251934 +11 33 09.688174067   10.3       ~ 1395 1
7 NGC 4958 Sy1 13 05 48.8957905464 -08 01 12.999361656   12.10   10.77   ~ 109 0
8 NGC 5061 Sy2 13 18 05.054 -26 50 14.00   11.18 10.41 9.66 13.59 ~ 181 0
9 NGC 5333 GiG 13 54 24.2218215576 -48 30 44.914287240   12.82   11.23   ~ 50 0
10 * 18 Lib PM* 14 58 53.5813630608 -11 08 38.462393832   7.146 5.857     K3-IIICN2 129 0
11 NGC 5813 LIN 15 01 11.2302420864 +01 42 07.141569696 12.00 11.45 10.46 10.06   ~ 673 2
12 HD 136028 * 15 18 26.1268629072 -00 27 40.443035364 9.22 7.40 5.89     K2/3III 54 0
13 HD 148513 PM* 16 28 33.9807973104 +00 39 54.001143144 8.65 6.85 5.39     K3V 170 0
14 NGC 6553 GlC 18 09 15.68 -25 54 27.9   9.08       ~ 644 0
15 * eta Sct PM* 18 57 03.6701923416 -05 50 46.734335232   5.904 4.818     K1-III 106 0
16 NGC 6868 Sy2 20 09 54.08207 -48 22 46.2470   11.58 9.22 10.01 7.91 ~ 239 2
17 NGC 7144 GiG 21 52 42.4890937656 -48 15 13.729791132   11.87 10.71 10.39   ~ 156 1

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