2025ApJ...988...58L

Query : 2025ApJ...988...58L

2025ApJ...988...58L - Astrophys. J., 988, 58 (2025/July-3)

Spectroscopic Study of Globular and Fuzzy Clusters in Lenticular Galaxy NGC 1023.

LOPEZ-SANTAMARIA M.A., MAYYA Y.D., LOMELI-NUNEZ L., RODRIGUEZ-MERINO L.H., ALZATE J.A., CORTESI A., OVANDO P.A. and ROSA-GONZALEZ D.

Abstract (from CDS):

We here report the results from spectroscopic observations of a sample of 26 globular cluster (GC) and 21 faint fuzzy (FF) candidates in the lenticular galaxy NGC 1023 using the 10.4 m Gran Telescopio Canarias. Using the recessional velocities and stellar absorption features, we determine that 18 and 9 of the observed candidates are bona fide GCs and FFs, respectively. The majority of the rejected FF candidates are background emission line galaxies for which we determine their redshifts. We used the spectroscopic data to determine velocity, age, metallicity, and extinction of all bona fide clusters. We find that FFs are clearly younger (age = 7-9 Gyr) than GCs (age > 10 Gyr). Both kinds of clusters in this galaxy are metal-rich ([Fe/H] = -0.58 ± 0.33). The ages and metallicities of individual FFs reported here are the first such measurements in any galaxy and agree with the previously reported measurement on stacked spectrum. The kinematical analysis reaffirms that the FFs belong to the disk of the galaxy, suggesting that their progenitors are most likely massive, compact disk clusters that have been able to survive for long timescales. We propose that the fuzzy appearance of FFs as compared to the GCs is a consequence of the dynamical evolution of their progenitor super star clusters in the disks of low-mass galaxies.

Abstract Copyright: © 2025. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Star clusters - Spectroscopy - Lenticular galaxies - Globular star clusters - Extragalactic astronomy

Simbad objects: 58

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Number of rows : 58
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 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 12317 1
2 [FAS2014] 152 GlC 02 40 05.782 +39 03 05.87           ~ 3 0
3 [FAS2014] 327 Cl? 02 40 08.1 +39 03 15           ~ 2 0
4 [FAS2014] 223 Cl? 02 40 10.0 +39 03 15           ~ 2 0
5 [FAS2014] 160 GlC 02 40 10.762 +39 03 45.61           ~ 3 0
6 [FAS2014] 312 Cl? 02 40 12.4 +39 02 49           ~ 2 0
7 [LB2002] n1023-25 GlC 02 40 12.991 +39 04 29.78           ~ 4 0
8 [FAS2014] 336 GlC 02 40 13.614 +39 04 19.81           ~ 3 0
9 [FAS2014] 173 PN 02 40 14.25 +39 03 16.3           ~ 3 0
10 [FAS2014] 289 Cl? 02 40 14.8 +39 03 47           ~ 2 0
11 [BL2002] N1023-FF-18 GlC 02 40 16.344 +39 03 28.91     22.68     ~ 5 0
12 [LB2002] n1023-21 GlC 02 40 16.8267554640 +39 03 51.925074768           ~ 4 0
13 [FAS2014] 114 PN 02 40 17.56 +39 03 47.3           ~ 4 0
14 [FAS2014] 154 GlC 02 40 17.933 +39 03 12.53           ~ 3 0
15 [FAS2014] 18 Cl? 02 40 18.7 +39 03 32           ~ 2 0
16 [FAS2014] 231 Cl? 02 40 20.5 +39 03 33           ~ 2 0
17 [FAS2014] 170 Cl? 02 40 21.0 +39 04 02           ~ 2 0
18 [BL2002] N1023-FF-12 GlC 02 40 21.528 +39 04 16.72     22.99     ~ 6 0
19 [FAS2014] 377 Cl? 02 40 21.9 +39 04 34           ~ 2 0
20 [FAS2014] 192 Cl? 02 40 23.4 +39 02 56           ~ 2 0
21 [LB2002] n1023-15 GlC 02 40 23.95 +39 04 48.7           ~ 3 0
22 NGC 1023 AG? 02 40 24.0133575864 +39 03 47.663392896 10.91 10.35 9.35 7.83   ~ 689 2
23 [FAS2014] 102 GlC 02 40 24.6159905544 +39 05 19.884705144           ~ 3 0
24 [FAS2014] 364 Cl? 02 40 26.0 +39 03 37           ~ 2 0
25 [BL2002] N1023-FF-10 Cl* 02 40 26.40 +39 04 19.6     23.31     ~ 4 0
26 [FAS2014] 157 Cl? 02 40 26.8 +39 04 21           ~ 2 0
27 [FAS2014] 375 GlC 02 40 27.202 +39 04 22.33           ~ 3 0
28 [FAS2014] 348 Cl* 02 40 27.8 +39 04 38           ~ 2 0
29 [FAS2014] 338 Cl? 02 40 29.1 +39 04 17           ~ 2 0
30 [FAS2014] 345 GlC 02 40 29.513 +39 03 38.52           ~ 3 0
31 [FAS2014] 325 Cl? 02 40 30.1 +39 04 21           ~ 2 0
32 [FAS2014] 259 Cl? 02 40 31.4 +39 04 07           ~ 2 0
33 [FAS2014] 319 Cl? 02 40 32.2 +39 04 06           ~ 2 0
34 [FAS2014] 286 Cl? 02 40 32.5 +39 03 02           ~ 2 0
35 [BL2002] N1023-FF-2 Cl* 02 40 33.79 +39 04 31.2     23.29     ~ 4 0
36 [FAS2014] 279 Cl? 02 40 34.3 +39 04 02           ~ 2 0
37 EO NGC 1023 170 G 02 40 34.723 +39 05 24.11     19.08 18.51   ~ 4 0
38 [FAS2014] 328 Cl? 02 40 36.0 +39 03 48           ~ 2 0
39 [FAS2014] 305 Cl* 02 40 36.4 +39 04 17           ~ 3 0
40 NGC 1023A GiG 02 40 37.1 +39 03 33       14.52   ~ 52 1
41 [FAS2014] 334 Cl? 02 40 37.1 +39 05 28           ~ 2 0
42 [FAS2014] 330 Cl? 02 40 37.6 +39 05 26           ~ 2 0
43 [FAS2014] 292 Cl? 02 40 38.4 +39 03 48           ~ 2 0
44 [FAS2014] 222 Cl? 02 40 39.0 +39 04 07           ~ 2 0
45 [FAS2014] 354 Cl? 02 40 39.7 +39 04 14           ~ 2 0
46 [FAS2014] 91 Cl? 02 40 40.9 +39 03 18           ~ 2 0
47 [FAS2014] 168 Cl? 02 40 42.0 +39 05 37           ~ 2 0
48 [FAB2017] NGC1023 S24 GlC 02 40 42.638 +39 05 00.82           ~ 3 0
49 [FAS2014] 361 Cl? 02 40 43.3 +39 05 28           ~ 2 0
50 [FAS2014] 233 GlC 02 40 44.184 +39 04 55.60           ~ 3 0
51 BD+52 913 WD* 05 05 30.6180977592 +52 49 51.919301604 10.25 11.44 11.69 11.93 12.108 DA.8 1153 0
52 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
53 M 81 Sy2 09 55 33.1726556496 +69 03 55.062505368   7.89 6.94     ~ 4725 3
54 M 82 AGN 09 55 52.430 +69 40 46.93 9.61 9.30 8.41     ~ 6156 6
55 NAME Antennae IG 12 01 53.170 -18 52 37.92           ~ 1749 0
56 M 51 Sy2 13 29 52.698 +47 11 42.93   9.26 8.36 8.40   ~ 4565 4
57 M 101 GiP 14 03 12.583 +54 20 55.50   8.46 7.86 7.76   ~ 3138 2
58 NAME Local Group GrG ~ ~           ~ 9325 0

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