2008A&A...489.1065M


C.D.S. - SIMBAD4 rel 1.7 - 2020.08.09CEST05:11:14

2008A&A...489.1065M - Astronomy and Astrophysics, volume 489, 1065-1071 (2008/10-3)

Spectroscopy of globular clusters in the low-luminosity spiral galaxy NGC 45.

MORA M.D., LARSEN S.S. and KISSLER-PATIG M.

Abstract (from CDS):

Extragalactic globular clusters have been studied in elliptical galaxies and in a few luminous spiral galaxies, but little is known about globular clusters in low-luminosity spirals. Past observations with the ACS have shown that NGC 45 hosts a large population of globular clusters (19), as well as several young star clusters. In this work we aim to confirm the bona fide globular cluster status for 8 of 19 globular cluster candidates and to derive metallicities, ages, and velocities. VLT/FORS2 multislit spectroscopy in combination with the Lick/IDS system was used to derive velocities and to constrain metallicities and [α/Fe] element ratio of the globular clusters. We confirm the 8 globular clusters as bona fide globular clusters. Their velocities indicate halo or bulge-like kinematics, with little or no overall rotation. From absorption indices such as Hβ, Hγ, and Hδ and the combined [MgFe]' index, we found that the globular clusters are metal-poor [Z/H]≤-0.33dex and [α/Fe]≤0.0 element ratio. These results argue in favor of a population of globular clusters formed during the assembling of the galaxy.

Abstract Copyright:

Journal keyword(s): galaxies: individual: NGC 45 - galaxies: star clusters

Simbad objects: 23

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Number of rows : 23

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 [MLK2007] 35 Cl* 00 14 03.530 -23 10 48.78 21.93 22.21 21.62   20.73 ~ 3 0
2 [MLK2007] 33 Cl* 00 14 03.640 -23 10 44.86 22.250 21.981 21.358   20.355 ~ 2 0
3 [MLK2007] 34 Cl* 00 14 03.910 -23 10 54.72   21.225 20.452     ~ 2 0
4 NGC 45 LSB 00 14 03.989 -23 10 55.53 11.92 11.21 10.73 10.58 10.4 ~ 228 1
5 [MLK2007] 47 Cl* 00 14 04.410 -23 11 16.09   21.46 20.74   19.75 ~ 3 0
6 [MLK2007] 45 Cl* 00 14 04.680 -23 11 18.17   22.23 21.51   20.43 ~ 3 0
7 [MLK2007] 43 Cl* 00 14 04.940 -23 10 54.24   21.24 20.524   19.483 ~ 3 0
8 [MLK2007] 40 Cl* 00 14 06.930 -23 10 47.12   20.53 19.978   19.035 ~ 3 0
9 NGC 121 GlC 00 26 49.0 -71 32 10   11.2 11.24     ~ 275 0
10 HD 3567 PM* 00 38 31.9476246205 -08 18 33.395481958 9.54 9.70 9.23     F7/8wF3 190 0
11 M 31 G 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 10949 1
12 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 9478 1
13 NAME Scl Group GrG 01 00 06 -33 44.2           ~ 463 0
14 * psi02 Psc ** 01 07 57.1726151056 +20 44 20.709599970   5.685 5.563     A3V 62 0
15 [MLK2007] 42 Cl* 01 14 04.180 -23 10 34.09   21.671 20.997   19.985 ~ 2 0
16 M 33 GiG 01 33 50.904 +30 39 35.79 6.17 6.27 5.72     ~ 5148 1
17 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 14874 1
18 V* V2564 Oph LP? 18 04 40.0713993238 +03 46 44.716089845 9.53 8.59 7.30 6.24 5.43 F6/7V 243 0
19 HD 180928 PM* 19 19 00.0954907407 -15 32 11.650001328 9.06 7.49 6.06 4.94 4.11 K4III 88 0
20 HD 195633 PM* 20 32 23.9917031781 +06 31 03.251333868 9.05 9.03 8.52     G0Vw 126 0
21 HD 221148 PM* 23 29 32.0811959294 -04 31 57.881823844   7.34 6.25     K3-IIIbFe2 130 0
22 NGC 7793 GiG 23 57 49.7533807411 -32 35 27.708304655 10.26 9.74 9.28 9.06 9.7 ~ 923 2
23 NAME Local Group GrG ~ ~           ~ 7000 0

    Equat.    Gal    SGal    Ecl

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2020.08.09-05:11:14

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