2019AJ....158...35S

Query : 2019AJ....158...35S

2019AJ....158...35S - Astron. J., 158, 35-35 (2019/July-0)

The Swift UVOT Stars Survey. III. Photometry and color-magnitude diagrams of 103 Galactic open clusters.

SIEGEL M.H., LAPORTE S.J., PORTERFIELD B.L., HAGEN L.M.Z. and GRONWALL C.A.

Abstract (from CDS):

As part of the Swift/Ultraviolet-Optical Telescope Stars Survey, we present near-ultraviolet (NUV; 3000-1700 Å) point-source photometry for 103 Galactic open clusters. These data, taken over the span of the mission, provide a unique and unprecedented set of NUV point-source photometry on simple stellar populations. After applying a membership analysis fueled mostly by Gaia DR2 proper motions, we find that 49 of these 103 have clear precise color-magnitude diagrams (CMDs) amenable to investigation. We compare the CMDs to theoretical isochrones and find good agreement between the theoretical isochrones and the CMDs. The exceptions are the fainter parts of the main sequence and the red giant branch in the uvw2 - uvw1 CMDs, which is most likely due to either the difficulty of correcting for the red leak in the uvw2 filter or limitations in our understanding of UV opacities for cool stars. For the most part, our derived cluster parameters-age, distance, and reddening-agree with the consensus literature, but we find a few clusters that warrant substantial revision from literature values, notably NGC 2304, NGC 2343, NGC 2360, NGC 2396, NGC 2428, NGC 2509, NGC 2533, NGC 2571, NGC 2818, Collinder 220, and NGC 6939. A number of these are clusters in the third Galactic quadrant, where previous studies may have mistaken the disk sequence for the cluster. However, the Gaia DR2 proper motions clearly favor a different sequence. A number of clusters also show white dwarf and blue straggler sequences. We confirm the presence of extended main-sequence turnoffs in NGC 2360 and NGC 2818 and show hints of them in a number of other clusters that may warrant future spectroscopic study. Most of the clusters in the study have low extinction, and the rest are well fit by a "Milky Way-like" extinction law. However, Collinder 220 hints at a possible "LMC-like" extinction law. We finally provide a comprehensive point-source catalog to the community as a tool for future investigation.

Abstract Copyright: © 2019. The American Astronomical Society. All rights reserved.

Journal keyword(s): open clusters and associations: general - stars: early-type - stars: general

VizieR on-line data: <Available at CDS (J/AJ/158/35): table1.dat table2.dat>

Simbad objects: 112

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Number of rows : 112
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 Cl Blanco 1 OpC 00 03 04.1 -29 48 55           ~ 380 0
2 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 13622 1
3 NGC 188 OpC 00 47 14.8 +85 14 42           ~ 990 0
4 NGC 752 OpC 01 56 53.7 +37 45 06           ~ 712 0
5 IC 1805 OpC 02 32 52.1 +61 28 36           ~ 542 1
6 NGC 1039 OpC 02 42 09.1 +42 44 02           ~ 467 0
7 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 7988 0
8 Cl Melotte 25 OpC 04 30 27.4 +16 46 43           ~ 3309 0
9 NGC 1896 OpC 05 25.7 +29 18           ~ 16 1
10 NGC 1996 OpC 05 38.0 +25 46           ~ 18 1
11 NAME 30 Dor Nebula SFR 05 38 36.0 -69 05 11           ~ 1276 2
12 NGC 2143 OpC 06 03.1 +05 46           ~ 17 1
13 NGC 2184 OpC 06 06 49.8 -02 02 22           ~ 49 1
14 NGC 2180 err 06 09 48 +04 48.4           ~ 23 0
15 NGC 2192 OpC 06 15 16.5 +39 50 39     10.9     ~ 52 0
16 NGC 2204 OpC 06 15 31.5 -18 40 28   9.35 8.6     ~ 172 0
17 NGC 2243 OpC 06 29 34.3 -31 16 58   10.12 9.4     ~ 298 0
18 NGC 2240 OpC 06 33 10 +35 15.0           ~ 27 1
19 NGC 2251 OpC 06 34 44.8 +08 21 15   7.69 7.3     ~ 123 0
20 NGC 2252 OpC 06 35 01.10 +05 25 13.4     7.7     ~ 29 0
21 NGC 2270 OpC 06 43 57 +03 28.7           ~ 27 1
22 M 41 OpC 06 46 03.1 -20 43 07   4.89 4.5     ~ 308 0
23 NGC 2281 OpC 06 48 19.7 +41 02 35   6.05 5.4     ~ 182 0
24 Cl Berkeley 75 OpC 06 49 00.0 -23 59 51           ~ 71 0
25 NGC 2301 OpC 06 51 51.0 +00 28 35   6.30 6.0     ~ 173 0
26 Cl Berkeley 29 OpC 06 53 03.6 +16 55 24   14.3       ~ 187 0
27 NGC 2306 OpC 06 54 25 -07 12.3           ~ 20 0
28 NGC 2304 OpC 06 55 12.5 +17 59 03     10.0     ~ 49 0
29 Cl Berkeley 31 OpC 06 57 37.5 +08 17 18           ~ 142 0
30 NGC 2319 OpC 07 00 32 +03 02.6           ~ 16 1
31 Cl Haffner 2 OpC 07 03 06.2 -20 49 07           ~ 146 0
32 NGC 2343 OpC 07 08 00.0 -10 37 17   7.05 6.7     ~ 91 0
33 HD 54387 * 07 08 16.0832334480 -10 37 25.831188012   9.72 8.46     G8/K1III+(F/G) 22 0
34 NGC 2355 OpC 07 16 59.1 +13 46 09     9.7     ~ 127 0
35 NGC 2358 OpC 07 17 02.6 -17 08 44           ~ 44 1
36 NGC 2360 OpC 07 17 45.8 -15 38 21           ~ 213 0
37 NGC 2367 OpC 07 20 06.7 -21 52 39           ~ 76 0
38 Cl Berkeley 37 OpC 07 20 17.5 -01 00 07           ~ 31 0
39 NAME Saurer A Cluster OpC 07 20.9 +01 48           ~ 70 0
40 NGC 2374 OpC 07 24 02.3 -13 15 12   8.46 8.0     ~ 63 0
41 Cl Melotte 66 OpC 07 26 19.2 -47 41 14   8.73       ~ 213 0
42 NGC 2395 OpC 07 27 06 +13 35.0           ~ 41 0
43 NGC 2396 OpC 07 27 59.9 -11 42 19     7.4     ~ 42 0
44 NGC 2422 OpC 07 36 35.8 -14 30 15           ~ 275 0
45 NGC 2423 OpC 07 37 11.3 -13 51 45           ~ 175 0
46 NGC 2420 OpC 07 38 24.6 +21 34 26   9.0 8.3     ~ 523 0
47 NGC 2428 OpC 07 39 21.0 -16 33 54           ~ 42 0
48 NGC 2430 OpC 07 39.6 -16 21           ~ 22 0
49 NGC 2437 OpC 07 41 45.4 -14 50 42           ~ 174 0
50 NGC 2451A OpC 07 42 55.4 -38 15 05           ~ 159 0
51 NGC 2447 OpC 07 44 34.6 -23 51 22           ~ 170 1
52 Cl Berkeley 39 OpC 07 46 48.1 -04 39 59           ~ 209 1
53 NGC 2477 OpC 07 52 11.4 -38 32 47   6.64 5.8     ~ 314 0
54 ESO 123-26 OpC 07 52 50.7 -60 20 25           ~ 32 0
55 NGC 2479 OpC 07 55 03.2 -17 43 48     9.6     ~ 37 0
56 NGC 2482 OpC 07 55 09.9 -24 16 39   7.71 7.3     ~ 102 0
57 NGC 2516 OpC 07 58 00.5 -60 46 36           ~ 793 0
58 NGC 2506 OpC 08 00 02.3 -10 46 22   8.28 7.6     ~ 313 0
59 NGC 2509 OpC 08 00 48.4 -19 03 28     9.3     ~ 39 0
60 NGC 2527 OpC 08 05 02.4 -28 07 06   6.81 6.5     ~ 119 0
61 NGC 2533 OpC 08 07 05.8 -29 52 21   8.19 7.6     ~ 69 0
62 NGC 2547 OpC 08 10 01.5 -49 12 08           ~ 445 0
63 NGC 2539 OpC 08 10 39.1 -12 49 52   7.05 6.5     ~ 164 0
64 NGC 2546 OpC 08 12 39.8 -37 39 34   6.46 6.3     ~ 125 0
65 NGC 2548 OpC 08 13 34.0 -05 43 11           ~ 227 0
66 NGC 2567 OpC 08 18 36.9 -30 38 15   7.77 7.4     ~ 97 0
67 NGC 2571 OpC 08 18 54.3 -29 45 45   7.16 7.0     ~ 85 0
68 NGC 2627 OpC 08 37 13.9 -29 57 04     8.4     ~ 74 0
69 NGC 2658 OpC 08 43 27.6 -32 39 50     9.2     ~ 55 0
70 NGC 2669 OpC 08 46 29.5 -52 55 05   6.35 6.1     ~ 81 0
71 NGC 2682 OpC 08 51 23.5 +11 48 54           ~ 2528 0
72 NGC 2818 OpC 09 16 10.8 -36 37 09           ~ 108 1
73 NGC 2825 GiG 09 19 22.4341968552 +33 44 33.940540536   15.3   13.69   ~ 38 0
74 NGC 2866 OpC 09 22 06.1 -51 06 03           ~ 26 2
75 NGC 2925 OpC 09 33 15.7 -53 24 39     8.3     ~ 80 0
76 NGC 3114 OpC 10 01 55.0 -60 02 16   4.47 4.2     ~ 213 0
77 NGC 3228 OpC 10 21 34.1 -51 45 39           ~ 98 0
78 Cl Westerlund 2 OpC 10 23 58.1 -57 45 49           ~ 400 0
79 Cl Collinder 220 OpC 10 25 44.7 -57 55 38           ~ 39 0
80 THA 35-II-42 WR* 10 25 56.5024585224 -57 48 43.519215708   14.168 12.661 12.102   WN5ha/O3+O3Vz((f*)) 105 0
81 C 1051-620 OpC 10 52 50 -62 18.3           ~ 10 0
82 CWNU 1078 OpC 10 55 52 -60 24.6           ~ 17 0
83 Cl Loden 306 OpC 11 06 08 -61 06.0           ~ 21 0
84 NGC 3603 OpC 11 14 57.9 -61 14 32           ~ 1136 1
85 NGC 3680 OpC 11 25 19.8 -43 14 38   8.40 7.6     ~ 340 0
86 Cl Loden 372 OpC 11 31 04.7 -58 30 28           ~ 28 0
87 Cl Melotte 111 OpC 12 11 54.9 +25 16 36           ~ 520 0
88 Cl Hogg 16 OpC 13 29 18 -61 12.0           ~ 69 0
89 Cl Lynga 2 OpC 14 24 23.9 -61 19 34   6.65 6.4     ~ 78 0
90 Cl Ruprecht 115 OpC 16 12 52.8 -52 23 46           ~ 38 0
91 Cl Pismis 22 OpC 16 14 12.5 -51 52 08           ~ 31 0
92 Cl Westerlund 1 OpC 16 47 02.4 -45 51 07           ~ 655 1
93 Cl HM 1 OpC 17 19 00 -38 49.0           ~ 52 0
94 NGC 6400 OpC 17 40 14.9 -36 57 01     8.8     ~ 39 0
95 Cl Ruprecht 131 OpC 17 49.2 -29 15           ~ 17 0
96 NGC 6649 OpC 18 33 26.2 -10 23 54   10.35 8.9     ~ 154 0
97 NGC 6791 OpC 19 20 52.8 +37 46 40   10.52 9.5     ~ 1120 0
98 NGC 6823 OpC 19 43 11.3 +23 18 32   7.71 7.1     ~ 279 2
99 NGC 6866 OpC 20 03 57.7 +44 10 22   8.04 7.6     ~ 185 0
100 Cl Alessi 10 OpC 20 04 51.3 -10 31 20           ~ 50 0
101 NGC 6882 OpC 20 11.8 +26 49     14.1     ~ 78 0
102 Cl Berkeley 87 OpC 20 21 35.0 +37 25 14           ~ 141 0
103 NGC 6939 OpC 20 31 40.6 +60 38 54           ~ 171 0
104 Cl Alessi 12 OpC 20 43 27.0 +23 51 12           ~ 57 0
105 NGC 6991 OpC 20 54 31.8 +47 23 26           ~ 77 2
106 NGC 7036 err 21 10 02 +15 31.1           ~ 17 0
107 NGC 7039 OpC 21 10 35.0 +45 36 09   8.06 7.6     ~ 73 0
108 Cl Berkeley 55 OpC 21 16 56.6 +51 45 41           ~ 41 0
109 NGC 7058 OpC 21 21 46.1 +50 49 43           ~ 48 0
110 NGC 7063 OpC 21 24 30.2 +36 29 45   7.32 7.0     ~ 99 0
111 NGC 7092 OpC 21 31 04.0 +48 17 47           ~ 245 0
112 NGC 7209 OpC 22 04 50.7 +46 30 11   8.24 7.7     ~ 144 0

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