2024MNRAS.528.1445L

Query : 2024MNRAS.528.1445L

2024MNRAS.528.1445L - Mon. Not. R. Astron. Soc., 528, 1445-1459 (2024/February-3)

Ages and metallicities of globular clusters in M81 using GTC/OSIRIS spectra.

LOMELI-NUNEZ L., MAYYA Y.D., RODRIGUEZ-MERINO L.H., OVANDO P.A., ALZATE J.A., ROSA-GONZALEZ D., CUEVAS-OTAHOLA B., BRUZUAL G., CORTESI A., GOMEZ-GONZALEZ V.M.A. and ESCUDERO C.G.

Abstract (from CDS):

We here present the results of an analysis of the optical spectroscopy of 42 globular cluster (GC) candidates in the nearby spiral galaxy M81 (3.61 Mpc). The spectra were obtained using the long-slit and multi-object spectroscopic modes of the OSIRIS instrument at the 10.4-m Gran Telescopio Canarias at a spectral resolution of ∼1000. We used the classical H β versus [MgFe]' index diagram to separate genuine old GCs from clusters younger than 3 Gyr. Of the 30 spectra with continuum signal-to-noise ratio >10, we confirm 17 objects to be classical GCs (age >10 Gyr, -1.4 < [Fe/H] < -0.4), with the remaining 13 being intermediate-age clusters (1-7.5 Gyr). We combined age and metallicity data of other nearby spiral galaxies (≲18 Mpc) obtained using similar methodology like the one we have used here to understand the origin of GCs in spiral galaxies in the cosmological context. We find that the metal-poor ([Fe/H] < -1) GCs continued to form up to 6 Gyr after the first GCs were formed, with all younger systems (age <8 Gyr) being metal rich.

Abstract Copyright: © 2024 The Author(s). Published by Oxford University Press on behalf of Royal Astronomical Society.

Journal keyword(s): galaxies: evolution - galaxies: formation - galaxies: spiral - galaxies: star clusters: general - galaxies: star clusters: individual - galaxies: star formation

Simbad objects: 50

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Number of rows : 50
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 [SMR2010] R04R10733 Cl* 09 54 46.430 +69 03 57.46   21.268       ~ 1 0
3 [SMR2010] R05R04684 Cl* 09 54 47.321 +69 05 24.33   20.820       ~ 1 0
4 [SMR2010] R05R01311 Cl* 09 54 49.099 +69 06 05.70   22.248       ~ 1 0
5 [SMR2010] R04R02765 Cl* 09 54 50.428 +69 05 08.60   21.945       ~ 1 0
6 [SMR2010] R02R14402 Cl* 09 54 51.177 +69 07 50.29   21.555       ~ 1 0
7 [SMR2010] R05R08459 Cl* 09 55 19.343 +69 05 50.31   21.298       ~ 1 0
8 [SMR2010] R05R09834 Cl* 09 55 20.295 +69 05 37.85   21.472       ~ 1 0
9 [SMR2010] R05R06584 Cl* 09 55 22.042 +69 06 37.84   18.185       ~ 1 0
10 [SMR2010] R05R10583 Cl* 09 55 22.189 +69 05 19.09   19.257       ~ 1 0
11 [SMR2010] R05R12224 Cl* 09 55 23.496 +69 04 52.72   22.291       ~ 1 0
12 [SMR2010] R05R11972 Cl* 09 55 23.915 +69 04 59.66   21.572       ~ 1 0
13 [SMR2010] R09R02775 Cl* 09 55 30.224 +69 01 59.70   21.725       ~ 1 0
14 [SMR2010] R09R01598 Cl* 09 55 30.807 +69 01 28.92   22.205       ~ 1 0
15 [SMR2010] R06R14272 Cl* 09 55 30.921 +69 07 38.91   19.317       ~ 1 0
16 [SMR2010] R06R17963 Cl* 09 55 31.195 +69 06 02.40   21.434       ~ 1 0
17 [SMR2010] R06R15830 Cl* 09 55 31.421 +69 06 18.31   22.759       ~ 1 0
18 [SMR2010] R06R14182 Cl* 09 55 32.009 +69 07 12.61   23.080       ~ 1 0
19 [SMR2010] R06R15013 Cl* 09 55 32.971 +69 06 39.97   19.858       ~ 1 0
20 M 81 Sy2 09 55 33.1726556496 +69 03 55.062505368   7.89 6.94     ~ 4725 3
21 [SMR2010] R09R03952 Cl* 09 55 33.590 +69 02 32.02   22.689       ~ 1 0
22 [SMR2010] R06R14078 Cl* 09 55 34.534 +69 06 42.45   21.789       ~ 1 0
23 [SMR2010] R06R13269 Cl* 09 55 36.862 +69 06 33.14   21.326       ~ 1 0
24 [SMR2010] R06R15901 Cl* 09 55 36.953 +69 04 55.52   22.008       ~ 1 0
25 [SMR2010] R10R02298 Cl* 09 55 37.202 +69 04 15.66   20.935       ~ 1 0
26 [SMR2010] R09R02463 Cl* 09 55 37.406 +69 02 07.73   19.649       ~ 1 0
27 [SMR2010] R09R01067 Cl* 09 55 37.465 +69 01 25.69   23.013       ~ 1 0
28 [SMR2010] R10R05960 Cl* 09 55 37.924 +69 03 28.12   19.696       ~ 1 0
29 [SMR2010] R06R11333 Cl* 09 55 38.629 +69 06 55.25   21.389       ~ 1 0
30 [SMR2010] R06R14067 Cl* 09 55 39.468 +69 05 32.83   20.797       ~ 1 0
31 [SMR2010] R10R01848 Cl* 09 55 40.127 +69 04 32.44   21.124       ~ 1 0
32 [SMR2010] R10R03509 Cl* 09 55 40.137 +69 04 10.33   18.797       ~ 1 0
33 [SMR2010] R06R13765 Cl* 09 55 40.608 +69 05 24.94   21.159       ~ 1 0
34 [SMR2010] R09R03511 Cl* 09 55 40.905 +69 02 37.64   21.768       ~ 1 0
35 [SMR2010] R06R14042 Cl* 09 55 41.116 +69 05 04.07   22.242       ~ 1 0
36 [SMR2010] R10R07655 Cl* 09 55 41.455 +69 03 11.44   21.370       ~ 1 0
37 [SMR2010] R10R09559 Cl* 09 55 46.031 +69 03 00.66   18.996       ~ 1 0
38 [SMR2010] R12R17286 Cl* 09 55 50.342 +68 58 22.87   20.804       ~ 1 0
39 [SMR2010] R10R11530 Cl* 09 55 50.421 +69 02 42.89   23.421       ~ 1 0
40 [SMR2010] R06R03030 Cl* 09 55 51.978 +69 07 39.70   19.944       ~ 1 0
41 M 82 AGN 09 55 52.430 +69 40 46.93 9.61 9.30 8.41     ~ 6156 6
42 [SMR2010] R10R11944 Cl* 09 55 54.633 +69 02 52.76   19.710       ~ 1 0
43 [SMR2010] R10R14199 Cl* 09 55 57.856 +69 02 23.30   20.491       ~ 1 0
44 NAME M 81 Triplet GrG 09 56.0 +69 00           ~ 26 1
45 [SMR2010] R10R10692 Cl* 09 56 08.549 +69 03 51.31   19.118       ~ 1 0
46 [SMR2010] R13R19709 Cl* 09 56 11.262 +68 59 00.63   19.399       ~ 1 0
47 NGC 3077 GiP 10 03 19.0965510921 +68 44 01.556166166 11.23 10.85 10.14 9.74   ~ 808 0
48 Feige 34 HS* 10 39 36.7358839104 +43 06 09.212615280 9.613 10.91 11.14 11.319 11.464 sdOp 731 0
49 M 85 GiP 12 25 24.053 +18 11 27.89   10.2       ~ 678 0
50 Ross 640 WD* 16 28 25.0030896166 +36 46 15.846877416   14.01   13.9   DZ6 220 0

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