2006A&A...445...69S


Query : 2006A&A...445...69S

2006A&A...445...69S - Astronomy and Astrophysics, volume 445, 69-77 (2006/1-1)

Near-IR photometry of asymptotic giant branch stars in the dwarf elliptical galaxy NGC 147.

SOHN Y.-J., KANG A., RHEE J., SHIN M., CHUN M.-S. and KIM H.-I.

Abstract (from CDS):

Near-infrared J, H and K' images were used to investigate the stellar contents of the asymptotic giant branch (AGB) population in the nearby dwarf elliptical galaxy NGC 147. The obtained (K, J-K) and (K, H-K) color-magnitude diagrams contain stars of AGB and red giant branch populations, where the former consists of a group of bright blue stars, a dominant population of M giant and a red C star population. We identified 91 AGB C stars in NGC 147 with the mean absolute magnitude and colors of <MK≥-7.56, <(J-K)0≥1.81 and <(H-K)0≥0.74. The estimated number ratio of C stars to M giant stars (C/M) is 0.16±0.02. The estimated local C/M ratios of 0.14±0.02 for the inner region (r<70'') and 0.19±0.03 for the outer region (r>70'') indicate a weak radial gradient. The mean bolometric magnitude of 91 C stars in NGC 147 is <Mbol≥-4.32±0.49. The bolometric luminosity function of M giant stars in NGC 147 extends up to Mbol=-5.8mag, and that of only C stars spans -5.6<Mbol←3.5. The color histograms of AGB stars in (J-K) and (H-K) show a main peak containing M giant stars, a red tail containing C stars with a weak excess, and a blue excess possibly due to bright blue foreground stars and AGB stars younger than M giants. The comparison of the theoretical isochrone models with the color distribution and the brightness of AGB stars indicates that most of the bright M giants in NGC 147 were formed at log(tyr)∼8.4 with a range of 8.2∼8.6. Ages of the majority of M giant stars in NGC 147 are similar to those of younger M giant stars in its companion NGC 185, while their formation occurred more recently than the older M giant stars in NGC 185 by ∼2Gyr.

Abstract Copyright:

Journal keyword(s): galaxies: individual: NGC 147 - galaxies: stellar content - stars: AGB and post-AGB

VizieR on-line data: <Available at CDS (J/A+A/445/69): table2.dat>

Nomenclature: Table 2: [SKR2006] NN (Nos 1-91).

Simbad objects: 97

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Number of rows : 97
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 [SKR2006] 1 AB* 00 33 06.50 +48 31 13.3           ~ 1 0
2 [SKR2006] 2 C* 00 33 06.610 +48 31 35.60           ~ 2 0
3 [SKR2006] 3 AB* 00 33 06.68 +48 28 39.9           ~ 1 0
4 [SKR2006] 4 AB* 00 33 06.74 +48 29 53.9           ~ 1 0
5 [SKR2006] 5 C* 00 33 07.215 +48 31 29.62       22.190 21.031 KIII 4 0
6 [SKR2006] 6 C* 00 33 07.379 +48 30 38.03           ~ 2 0
7 [SKR2006] 7 AB* 00 33 07.92 +48 30 01.5           ~ 1 0
8 [SKR2006] 8 AB* 00 33 08.27 +48 29 29.8           KIII 2 0
9 [SKR2006] 10 C* 00 33 08.430 +48 29 33.56           ~ 2 0
10 [SKR2006] 9 AB* 00 33 08.43 +48 29 41.4           ~ 1 0
11 [SKR2006] 12 C* 00 33 08.502 +48 29 36.66       20.696 19.584 ~ 3 0
12 [SKR2006] 11 AB* 00 33 08.53 +48 30 01.8           ~ 1 0
13 [SKR2006] 13 C* 00 33 08.682 +48 29 53.42           ~ 2 0
14 [SKR2006] 14 AB* 00 33 08.77 +48 31 04.2           ~ 1 0
15 [SKR2006] 15 AB* 00 33 08.85 +48 29 19.6           ~ 1 0
16 [SKR2006] 16 C* 00 33 08.925 +48 30 19.56       21.152 20.009 ~ 3 0
17 [SKR2006] 17 C* 00 33 08.986 +48 30 39.36       21.244 19.983 ~ 3 0
18 [SKR2006] 18 AB* 00 33 08.99 +48 29 25.6           ~ 1 0
19 [SKR2006] 19 AB* 00 33 09.05 +48 28 43.4           ~ 1 0
20 [SKR2006] 20 AB* 00 33 09.21 +48 31 32.6           ~ 1 0
21 [SKR2006] 21 C* 00 33 09.227 +48 29 52.84           ~ 2 0
22 [SKR2006] 22 C* 00 33 09.578 +48 29 39.45           ~ 2 0
23 [SKR2006] 24 AB* 00 33 10.36 +48 28 37.9           ~ 1 0
24 [SKR2006] 23 AB* 00 33 10.36 +48 28 50.6           ~ 1 0
25 [SKR2006] 25 AB* 00 33 10.38 +48 29 43.1           ~ 1 0
26 [SKR2006] 26 AB* 00 33 10.39 +48 30 05.6           ~ 1 0
27 [SKR2006] 27 AB* 00 33 11.18 +48 29 10.7           ~ 1 0
28 [SKR2006] 28 AB* 00 33 11.47 +48 28 47.2           ~ 1 0
29 [SKR2006] 29 AB* 00 33 11.49 +48 29 11.4           ~ 1 0
30 [MNM2010] NGC 147 2 LP* 00 33 11.781 +48 30 16.24           KIII 3 0
31 [SKR2006] 31 C* 00 33 11.986 +48 30 41.10           ~ 2 0
32 [SKR2006] 32 C* 00 33 12.083 +48 31 05.08           ~ 2 0
33 NGC 147 GiG 00 33 12.120 +48 30 31.46   12.0 9.5     ~ 643 1
34 [SKR2006] 33 AB* 00 33 12.13 +48 30 45.9           ~ 1 0
35 [SKR2006] 34 C* 00 33 12.283 +48 29 32.28           ~ 2 0
36 [SKR2006] 35 AB* 00 33 12.41 +48 29 37.1           ~ 1 0
37 [SKR2006] 36 C* 00 33 12.506 +48 30 51.55           ~ 2 0
38 [SKR2006] 37 AB* 00 33 12.55 +48 31 01.6           ~ 1 0
39 [SKR2006] 38 AB* 00 33 12.79 +48 31 02.8           ~ 1 0
40 [SKR2006] 39 C* 00 33 12.886 +48 29 50.98           KIII 3 0
41 [SKR2006] 40 C* 00 33 13.136 +48 30 05.32       20.971 19.857 ~ 3 0
42 [SKR2006] 41 AB* 00 33 13.33 +48 31 13.5           ~ 1 0
43 [SKR2006] 42 AB* 00 33 13.58 +48 29 06.2           KIII 4 0
44 [SKR2006] 44 C* 00 33 13.75 +48 30 15.0       21.675 20.106 ~ 2 0
45 [SKR2006] 43 C* 00 33 13.752 +48 31 11.17       20.922 19.760 ~ 3 0
46 [SKR2006] 46 C* 00 33 14.065 +48 28 48.95       20.924 19.612 ~ 3 0
47 [SKR2006] 45 AB* 00 33 14.12 +48 28 57.8           ~ 1 0
48 [SKR2006] 47 AB* 00 33 14.33 +48 31 21.4           ~ 1 0
49 [SKR2006] 48 C* 00 33 14.372 +48 29 42.97           ~ 2 0
50 [SKR2006] 49 AB* 00 33 15.16 +48 30 07.0           ~ 1 0
51 [SKR2006] 50 C* 00 33 15.717 +48 31 45.02       21.274 20.020 ~ 3 0
52 [SKR2006] 51 AB* 00 33 15.74 +48 30 36.7           ~ 1 0
53 [SKR2006] 52 AB* 00 33 15.84 +48 29 03.2           ~ 1 0
54 [SKR2006] 53 AB* 00 33 16.22 +48 30 08.0           ~ 1 0
55 [SKR2006] 54 C* 00 33 16.26 +48 31 23.2       22.018 20.554 ~ 2 0
56 [SKR2006] 55 C* 00 33 16.44 +48 31 38.4       21.865 20.403 ~ 2 0
57 [SKR2006] 56 C* 00 33 16.529 +48 31 58.91           ~ 2 0
58 [SKR2006] 57 AB* 00 33 16.57 +48 29 09.4           ~ 1 0
59 [SKR2006] 58 AB* 00 33 16.60 +48 29 53.3           ~ 1 0
60 [SKR2006] 59 AB* 00 33 16.63 +48 29 50.7           ~ 1 0
61 [SKR2006] 60 C* 00 33 16.74 +48 31 41.5       22.165 20.538 ~ 2 0
62 [SKR2006] 61 AB* 00 33 16.80 +48 31 26.8           ~ 1 0
63 [SKR2006] 62 AB* 00 33 17.29 +48 28 54.7           ~ 1 0
64 [SKR2006] 63 AB* 00 33 17.43 +45 31 41.5           ~ 1 0
65 [SKR2006] 64 C* 00 33 17.464 +48 31 18.94           ~ 2 0
66 [SKR2006] 65 C* 00 33 17.737 +48 31 45.94           ~ 2 0
67 [SKR2006] 66 C* 00 33 17.863 +48 30 26.10       20.842 19.536 ~ 3 0
68 [SKR2006] 67 C* 00 33 18.152 +48 29 28.57       20.564 19.519 ~ 3 0
69 [SKR2006] 68 C* 00 33 18.414 +48 29 46.85           ~ 2 0
70 [SKR2006] 69 AB* 00 33 19.582 +48 30 51.63           KIII 3 0
71 [SKR2006] 70 AB* 00 33 19.93 +48 29 59.2           ~ 1 0
72 [SKR2006] 71 C* 00 33 20.125 +48 31 07.14       21.840 20.519 ~ 3 0
73 [SKR2006] 73 C* 00 33 20.567 +48 30 56.92       20.874 19.806 ~ 3 0
74 [SKR2006] 72 AB* 00 33 20.61 +48 31 29.6           KIII 2 0
75 [SKR2006] 74 AB* 00 33 20.89 +48 29 26.8           KIII 2 0
76 [SKR2006] 75 C* 00 33 21.656 +48 30 03.85       21.538 20.213 ~ 3 0
77 [SKR2006] 77 C* 00 33 21.843 +48 30 44.26       20.932 19.606 ~ 3 0
78 [NKO2003] NGC 147 05791380 C* 00 33 21.854 +48 31 23.86       21.816 20.289 ~ 3 0
79 [SKR2006] 78 AB* 00 33 22.40 +48 31 09.4           KIII 2 0
80 [SKR2006] 79 AB* 00 33 22.67 +48 28 55.1           ~ 1 0
81 [SKR2006] 80 AB* 00 33 22.91 +48 31 58.6           ~ 1 0
82 [SKR2006] 81 AB* 00 33 24.16 +48 31 32.7           ~ 1 0
83 [SKR2006] 82 AB* 00 33 24.32 +48 31 11.5           ~ 1 0
84 [SKR2006] 83 C* 00 33 24.371 +48 31 36.34       22.327 20.704 ~ 3 0
85 [SKR2006] 84 AB* 00 33 25.08 +48 29 19.6           ~ 1 0
86 [SKR2006] 85 AB* 00 33 25.66 +48 31 52.5           ~ 1 0
87 [SKR2006] 86 C* 00 33 26.414 +48 31 40.98           ~ 2 0
88 [SKR2006] 87 C* 00 33 26.43 +48 30 39.3       21.565 20.242 ~ 2 0
89 [SKR2006] 88 AB* 00 33 26.83 +48 30 30.3           ~ 1 0
90 [SKR2006] 89 C* 00 33 27.656 +48 30 33.00       21.802 20.560 ~ 3 0
91 [SKR2006] 90 AB* 00 33 27.75 +48 30 52.7           ~ 1 0
92 [SKR2006] 91 AB* 00 33 28.16 +48 29 29.2           ~ 1 0
93 NGC 185 Sy2 00 38 57.970 +48 20 14.56   9.10 9.2     ~ 752 1
94 M 110 GiG 00 40 22.0544552438 +41 41 07.496294862   8.92 8.07     ~ 1244 1
95 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 6078 1
96 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 15667 1
97 NAME Local Group GrG ~ ~           ~ 7440 0

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2021.12.02-07:08:39

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