2002A&A...395..761K


C.D.S. - SIMBAD4 rel 1.7 - 2020.08.14CEST14:14:55

2002A&A...395..761K - Astronomy and Astrophysics, volume 395, 761-777 (2002/12-1)

VLT spectroscopy of NGC 3115 globular clusters.

KUNTSCHNER H., ZIEGLER B.L., SHARPLES R.M., WORTHEY G. and FRICKE K.J.

Abstract (from CDS):

We present results derived from VLT-FORS2 spectra of 24 different globular clusters associated with the lenticular galaxy NGC 3115. A subsample of 17 globular clusters have sufficiently high signal-to-noise to allow precision measurements of absorption line-strengths. Comparing these indices to new stellar population models by Thomas et al. we determine ages, metallicities and element abundance ratios. For the first time these stellar population models explicitly take abundance ratio biases in the Lick/IDS stellar library into account. Our data are also compared with the Lick/IDS observations of Milky Way and M31 globular clusters. Unpublished higher order Balmer lines (HγA,F and HδA,F) from the Lick/IDS observations are given in the Appendix. Our best age estimates show that the observed clusters which sample the bimodal colour distribution of NGC 3115 are coeval within our observational errors (2-3Gyr). Our best calibrated age/metallicity diagnostic diagram (Hβ vs. [MgFe]) indicates an absolute age of 11-12 Gyr consistent with the luminosity weighted age for the central part of NGC3115. We confirm with our accurate line-strength measurements that the (V-I) colour is a good metallicity indicator within the probed metallicity range (-1.5<[Fe/H]<0.0). The abundance ratios for globular clusters in NGC 3115 give an inhomogeneous picture. We find a range from solar to super-solar ratios for both blue and red clusters. This is similar to the data for M31 while the Milky Way seems to harbour clusters which are mainly consistent with [α/Fe] ≃0.3. From our accurate recession velocities we detect, independent of metallicity, clear rotation in the sample of globular clusters. In order to explain the metallicity and abundance ratio pattern, particularly the range in abundance ratios for the metal rich globular clusters in NGC 3115, we favour a formation picture with more than two distinct formation episodes.

Abstract Copyright:

Journal keyword(s): galaxies: abundances - galaxies: individual: NGC 3115 - galaxies: star clusters - galaxies: stellar content - globular clusters: general

Nomenclature: Table 1: [KZS2002] NNa (Nos 2-13, 14a-14b, 15-24, 25a-25b, 26a-26b).

Status at CDS:   Acronym for new objects described in the dictionary of nomenclature and being created in SIMBAD.

CDS comments: Table 1: WHT and HST cross-id. not published.

Simbad objects: 70

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Number of rows : 70

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 NAME Mayall II GlC 00 32 46.53 +39 34 40.5   14.564 13.807 13.208 12.684 ~ 370 1
2 BA 3-17 GlC 00 39 33.72 +40 31 14.7 16.550 16.410 15.56 14.940 14.39 ~ 77 0
3 Bol 12 GlC 00 40 32.4598109034 +41 21 44.200706344 15.990 15.860 15.17 14.620 14.14 ~ 75 0
4 Bol 338 GlC 00 40 58.871 +40 35 47.41 15.189 15.060 14.259 13.754 13.27 ~ 71 0
5 [MLV92] 237751 GlC 00 41 01.151 +41 13 45.41 16.040 15.400 14.17 13.560 12.570 ~ 79 0
6 2MASS J00415300+4047096 GlC 00 41 53.0057629599 +40 47 09.637051361 16.050 15.810 15.00 14.480 14.03 ~ 74 0
7 M 31 G 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 10959 1
8 Bol 158 GlC 00 43 14.41 +41 07 21.3 15.900 15.560 14.65 14.150 13.550 ~ 113 1
9 [JSD2015] AP 2564 GlC 00 43 17.6290874889 +41 27 45.012855603 16.77 16.030 15.00 14.430 13.87 ~ 75 0
10 NAME Mayall IV GlC 00 43 17.85 +39 49 13.2 15.900 15.710 15.219 14.639 14.122 ~ 82 0
11 [JSD2015] AP 2927 GlC 00 43 25.5991585074 +41 15 37.108999499 16.78 16.270 15.26   14.07 ~ 68 0
12 Bol 178 GlC 00 43 30.78 +41 21 16.5 15.91 15.820 14.97 14.530 14.12 ~ 43 0
13 2MASX J00434551+4136578 GlC 00 43 45.5000374851 +41 36 57.607952934 17.04 16.300 15.33 14.760 14.18 ~ 83 0
14 Bol 212 GlC 00 44 03.07 +41 04 56.3 16.230 16.220 15.39 15.000 14.480 ~ 46 0
15 [JSD2015] AP 881 GlC 00 44 14.3252318610 +41 19 19.376228666 15.89 15.660 14.76 14.230 13.74 ~ 67 0
16 2E 166 GlC 00 44 29.5614604627 +41 21 35.695495111 15.50 15.000 14.220 13.679 13.02 ~ 124 0
17 [JSD2015] AP 483 GlC 00 44 40.2320952192 +41 15 00.522937543 16.46 16.390 15.62 15.200 14.67 ~ 62 0
18 Bol 240 GlC 00 45 25.0383976564 +41 06 22.131507926 16.030 15.930 15.210 14.730 14.210 ~ 76 0
19 NGC 1023 IG 02 40 24.012 +39 03 47.70 10.91 10.35 9.35 7.83   ~ 603 2
20 NGC 1380 GiP 03 36 27.590 -34 58 34.68 11.32 10.94 9.93 9.37   ~ 378 1
21 NGC 1399 BiC 03 38 29.083 -35 27 02.67 11.05 9.74 9.59 8.12   ~ 1450 1
22 GD 71 WD* 05 52 27.6197286025 +15 53 13.228639956 11.675 12.783 13.032 13.169 13.337 DA1.5 335 0
23 M 81 Sy2 09 55 33.17306143 +69 03 55.0609270   7.89 6.94     ~ 3975 5
24 [KZS2002] 3 Gl? 10 05 06.1 -07 44 30           ~ 1 0
25 [KZS2002] 2 Gl? 10 05 06.5 -07 45 01           ~ 1 0
26 [KZS2002] 6 Gl? 10 05 09.38 -07 43 50.0           ~ 2 0
27 [KZS2002] 4 Gl? 10 05 09.9 -07 45 01           ~ 1 0
28 [KZS2002] 5 Gl? 10 05 11.4 -07 45 01           ~ 1 0
29 [KZS2002] 8 Gl? 10 05 12.6 -07 44 09     19.794     ~ 1 0
30 [KZS2002] 7 * 10 05 12.70 -07 44 26.7     20.333   19.201 ~ 5 0
31 [KZS2002] 10 Gl? 10 05 13.03 -07 43 39.8     21.12   20.19 ~ 3 0
32 [KZS2002] 9 Gl? 10 05 13.17 -07 43 57.9     19.789   18.772 ~ 3 0
33 NGC 3115 GiG 10 05 13.978 -07 43 06.89   11   9.37   ~ 930 2
34 [JSR2014] A21 Gl? 10 05 14.4002514820 -07 43 33.846897138     20.544     ~ 2 0
35 [KZS2002] 11 Gl? 10 05 14.73 -07 43 54.5     21.59   20.47 ~ 3 0
36 [KZS2002] 13 Gl? 10 05 15.24 -07 43 32.6     21.01   20.09 ~ 4 0
37 [KZS2002] 14a Gl? 10 05 16.69 -07 43 27.7     21.25   20.21 ~ 2 0
38 [KZS2002] 15 Gl? 10 05 16.84 -07 43 07.7     20.91   20.01 ~ 4 0
39 [JSR2014] A15 Gl? 10 05 17.1471006284 -07 43 19.198714875     20.522     ~ 2 0
40 [KZS2002] 17 Gl? 10 05 17.22 -07 42 47.8     20.438   19.338 ~ 3 0
41 [KZS2002] 19 Gl? 10 05 17.36 -07 42 06.6     21.97   21.12 ~ 3 0
42 [KZS2002] 20 Gl? 10 05 17.68 -07 41 56.0     21.83   20.98 ~ 3 0
43 [KZS2002] 16 Gl? 10 05 18.08 -07 43 14.1     21.44   20.61 ~ 3 0
44 NAME [LIW2015] 92 LXB 10 05 18.43 -07 42 43.7     21.42   20.29 ~ 8 0
45 [KZS2002] 22 GlC 10 05 19.026 -07 41 45.25   22.55 21.82     ~ 6 0
46 [KZS2002] 21 Gl? 10 05 20.1 -07 42 16           ~ 1 0
47 [JSR2014] A5 Gl? 10 05 20.1567367864 -07 41 43.859424391           ~ 2 0
48 [KZS2002] 24 GlC 10 05 21.1767480234 -07 41 37.106297762           ~ 5 0
49 [KZS2002] 26a Gl? 10 05 22.69 -07 41 12.3   22.43 21.51     ~ 3 0
50 [KZS2002] 26b Gl? 10 05 22.9 -07 41 07           ~ 1 0
51 [KZS2002] 25a Gl? 10 05 23.4 -07 41 59           ~ 1 0
52 [JSR2014] A9 Gl? 10 05 23.6465576728 -07 41 53.879804732           ~ 2 0
53 M 104 LIN 12 39 59.43185 -11 37 22.9954 9.51 9.55 8.00 8.05   ~ 1276 3
54 M 53 GlC 13 12 55.25 +18 10 05.4   8.95 7.79     ~ 719 0
55 M 3 GlC 13 42 11.62 +28 22 38.2     6.39     ~ 2270 0
56 M 5 GlC 15 18 33.22 +02 04 51.7   7.34 5.95     ~ 1779 0
57 M 107 GlC 16 32 31.86 -13 03 13.6   9.96 8.85     ~ 704 0
58 M 13 GlC 16 41 41.634 +36 27 40.75     5.8     ~ 2013 0
59 NGC 6229 GlC 16 46 58.641 +47 31 36.38   9.38 9.86     ~ 315 0
60 M 12 GlC 16 47 14.18 -01 56 54.7   8.52 6.07     ~ 581 0
61 M 92 GlC 17 17 07.39 +43 08 09.4     6.52     ~ 1909 0
62 NGC 6356 GlC 17 23 34.99 -17 48 46.9   10.01 7.42     ~ 320 1
63 NGC 6624 GlC 18 23 40.51 -30 21 39.7           ~ 776 1
64 M 69 GlC 18 31 23.10 -32 20 53.1   9.32 8.31     ~ 407 1
65 NGC 6712 GlC 18 53 04.32 -08 42 21.5   9.85 8.69     ~ 468 0
66 M 71 GlC 19 53 46.49 +18 46 45.1   7.91 6.1     ~ 1027 0
67 M 72 GlC 20 53 27.70 -12 32 14.3   9.95 8.96     ~ 368 0
68 NGC 7006 GlC 21 01 29.465 +16 11 16.49     10.46     ~ 486 0
69 M 15 GlC 21 29 58.33 +12 10 01.2   3       ~ 2913 0
70 M 2 GlC 21 33 27.02 -00 49 23.7     6.25     ~ 903 1

    Equat.    Gal    SGal    Ecl

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2020.08.14-14:14:55

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