2013ApJ...773L..36C

Query : 2013ApJ...773L..36C

2013ApJ...773L..36C - Astrophys. J., 773, L36 (2013/August-3)

Chemical abundance evidence of enduring high star formation rates in an early-type galaxy: high [Ca/Fe] in NGC 5128 globular clusters.

COLUCCI J.E., DURAN M.F., BERNSTEIN R.A. and McWILLIAM A.

Abstract (from CDS):

We present [Fe/H], ages, and Ca abundances for an initial sample of 10 globular clusters in NGC 5128 obtained from high-resolution, high signal-to-noise ratio echelle spectra of their integrated light. All abundances and ages are obtained using our original technique for high-resolution integrated light abundance analysis of globular clusters. The clusters have a range in [Fe/H] between -1.6 and -0.2. In this sample, the average [Ca/Fe] for clusters with [Fe/H] ←0.4 is +0.37±0.07, while the average [Ca/Fe] in our Milky Way (MW) and M31 GC samples is +0.29±0.09 and +0.24±0.10, respectively. This may imply a more rapid chemical enrichment history for NGC 5128 than for either the MW or M31. This sample provides the first quantitative picture of the chemical history of NGC 5128 that is directly comparable to what is available for the MW. Data presented here were obtained with the MIKE echelle spectrograph on the Magellan Clay Telescope.

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Journal keyword(s): galaxies: abundances - galaxies: elliptical and lenticular, cD - galaxies: individual: NGC 5128 - galaxies: star clusters: general - galaxies: stellar content

VizieR on-line data: <Available at CDS (J/ApJ/773/L36): table1.dat table2.dat table3.dat>

Simbad objects: 16

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Number of rows : 16
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 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 13622 1
2 MCG-06-07-001 G 02 39 59.3 -34 26 57   9.02 7.4     ~ 1894 1
3 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
4 [VHH81] 41 GlC 13 24 38.9656460520 -43 20 06.486409572 20.20 19.59 18.59 17.94 17.32 ~ 28 0
5 [VHH81] 29 GlC 13 24 40.3771770240 -43 18 05.308939512 19.77 19.15 18.15 17.54 16.89 ~ 36 0
6 [VHH81] 31 GlC 13 24 57.4193525592 -43 01 08.176077660 20.09 19.42 18.38 17.75 17.06 ~ 15 0
7 [VHH81] 4 GlC 13 25 01.8018131256 -43 09 25.486559676 19.10 18.86 18.04 17.50 16.98 ~ 19 0
8 [HGH92] G342 GlC 13 25 05.83 -42 59 00.6 19.65 19.14 18.18 17.57 16.96 ~ 8 0
9 NAME Centaurus A BLL 13 25 27.61521044 -43 01 08.8050291   8.18 6.84 6.66   ~ 4774 3
10 [VHH81] 44 GlC 13 25 31.7317181472 -43 19 22.746120024 19.76 19.50 18.69 18.14 17.66 ~ 30 0
11 [VHH81] 17 GlC 13 25 39.7188791400 -42 55 59.137358376 18.82 18.51 17.63 17.10 16.57 ~ 36 0
12 [HGH92] G370 GlC 13 25 42.2393866248 -42 59 16.933062264 19.61 19.29 18.39 17.86 17.32 ~ 11 0
13 [VHH81] 19 GlC 13 25 43.3840630536 -43 07 22.928276928 19.37 19.01 18.12 17.59 17.03 ~ 17 0
14 [VHH81] 7 GlC 13 26 05.3936216880 -42 56 32.376406056 18.38 18.03 17.17 16.65 16.23 ~ 42 0
15 * alf Boo RG* 14 15 39.67207 +19 10 56.6730 2.46 1.18 -0.05 -1.03 -1.68 K1.5IIIFe-0.5 2417 1
16 NAME Local Group GrG ~ ~           ~ 9325 0

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