2015A&A...580A...4C


C.D.S. - SIMBAD4 rel 1.7 - 2020.08.11CEST13:09:42

2015A&A...580A...4C - Astronomy and Astrophysics, volume 580A, 4-4 (2015/8-1)

Insights into the properties of the Local (Orion) spiral arm. NGC 2302: First results and description of the program.

COSTA E., MOITINHO A., RADISZC M., MUNOZ R.R., CARRARO G., VAZQUEZ R.A. and SERVAJEAN E.

Abstract (from CDS):

The spiral structure of the Milky Way (MW) is highly uncertain and is the subject of much discussion nowadays. Even the spiral structure close to the Sun and the real nature of the so-called Local or Orion arm are poorly known. We present the first result from a program that determines the properties of the Local (Orion) spiral arm (LOA), together with a full description of the program. In this context we have made a comprehensive study of the young LOA open cluster NGC 2302, which includes a UBVRI photometric analysis and determination of its kinematic properties - proper motion (PM) and radial velocity (RV) - and of its orbital parameters. Making a geometric registration of our ad-hoc first- and second-epoch CCD frames (12-year timeframe), we determined the mean PM of NGC 2302 relative to the local field of disk stars, and, through a comparison with the UCAC4 catalog, we transformed this relative PM into an absolute one. Using medium-resolution spectroscopy of 26 stars in the field of NGC 2302, we derived its mean RV. We determined the cluster's structure, center, and radius by means of a density analysis of star counts. Photometric diagrams for several color combinations were built using our data, which allowed us to identify the stellar populations present in the field of NGC 2302 and to carry out our photometric membership analysis. Isochrone fits to the photometric diagrams allowed us to determine the fundamental parameters of NGC 2302, including reddening, distance, and age. The kinematic data and derived distance allowed us to determine the space motion of NGC 2302. This was done by adopting a time-independent, axisymmetric, and fully analytic gravitational potential for the MW. We obtained an absolute PM for NGC 2302 of (µα cos δ,µδ)=(-2.09,-2.11)mas/yr, with standard errors of 0.410 and 0.400mas/yr. The mean RV of NGC 2302 turned out to be 31.2km/s with a standard error of 0.7km/s. The density analysis revealed a remarkably spherical concentration of stars centered at α2000=06:51:51.820, δ2000=-07:05:10.68 with a radius of 2.5'. Although densely contaminated by field stars, all our photometric diagrams show a recognizable cluster sequence of bright stars (V≤18). The color-color diagrams show the existence of more than one population, each affected by distinct reddening with the cluster sequence at E(B-V)=0.23. Isochrone fits displaced for this reddening and for a distance modulus of (m-M)0=10.69 (distance, d=1.40 kpc) indicate an age of log(t)=7.90-8.00 with a slight tendency toward the younger age. Inspection of the shape of the orbit of NGC 2302 and the resulting orbital parameters indicate that it is a typical population I object.

Abstract Copyright:

Journal keyword(s): proper motions - open clusters and associations: general - open clusters and associations: individual: NGC 2302 - Galaxy: disk

VizieR on-line data: <Available at CDS (J/A+A/580/A4): table2.dat>

Simbad objects: 111

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Number of rows : 111

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 NAME Per Arm PoG 03 30 +45.0           ~ 1257 0
2 UCAC4 416-021453 * 06 51 35.0765633707 -06 59 34.933691377       15.38   ~ 1 0
3 UCAC4 415-021394 * 06 51 35.0768497339 -07 06 28.980883492     13.288 13.214   ~ 1 0
4 UCAC4 415-021400 * 06 51 35.7064152252 -07 02 29.625899469     15.910 15.580   ~ 1 0
5 UCAC4 415-021407 * 06 51 37.1936545026 -07 01 38.705861579     15.801 15.471   ~ 1 0
6 UCAC4 416-021466 * 06 51 37.7017794993 -06 59 36.471259167     13.127 12.940   ~ 1 0
7 UCAC4 415-021417 * 06 51 40.1502410098 -07 02 30.428804545       14.422   ~ 1 0
8 UCAC4 415-021418 * 06 51 40.1829072724 -07 04 08.972670620     14.520 14.379   ~ 1 0
9 UCAC4 415-021421 * 06 51 40.2901889245 -07 03 12.866092195   15.914 14.647 14.254   ~ 1 0
10 UCAC4 416-021477 * 06 51 40.3245292860 -06 57 45.354684263     15.412 15.084   ~ 1 0
11 UCAC4 415-021423 * 06 51 40.6554875098 -07 01 13.294095002     15.615 15.263   ~ 1 0
12 UCAC4 415-021425 * 06 51 40.9624177053 -07 06 10.760392844     14.630 14.301   ~ 1 0
13 UCAC4 415-021428 * 06 51 41.6626247818 -07 05 38.351896264     15.368 15.284   ~ 1 0
14 TYC 4812-193-1 * 06 51 42.1320129487 -07 05 09.110540030   10.92 10.883 10.985   ~ 1 0
15 TYC 4812-361-1 * 06 51 42.5386419771 -07 04 13.432179248   11.84 12.341 12.423   ~ 2 0
16 UCAC4 416-021500 * 06 51 44.2672785735 -06 59 55.403732315     13.511 13.366   ~ 2 0
17 UCAC4 415-021446 * 06 51 45.1320532597 -07 00 48.014739375     15.065 14.857   ~ 1 0
18 UCAC4 415-021447 * 06 51 45.1583010237 -07 07 12.630075563       14.635   ~ 1 0
19 UCAC4 416-021505 * 06 51 45.2208325480 -06 59 28.922056171     14.772 14.658   ~ 1 0
20 UCAC4 415-021452 * 06 51 46.1958140677 -07 04 36.160391627     15.046 14.899   ~ 1 0
21 UCAC4 415-021454 * 06 51 46.8225211256 -07 03 54.666035577     14.796 14.675   ~ 1 0
22 UCAC4 415-021457 * 06 51 47.2596298977 -07 05 05.635431898     15.805 15.586   ~ 1 0
23 TYC 4812-505-1 * 06 51 47.5061874737 -07 01 23.223206555   11.93 10.802 10.590   ~ 1 0
24 UCAC4 415-021460 * 06 51 47.9879057453 -07 06 54.723669926     16.407 16.150   ~ 1 0
25 UCAC4 415-021466 * 06 51 49.3395304638 -07 00 34.444810805     14.176 14.037   ~ 1 0
26 UCAC4 415-021467 * 06 51 49.6467107484 -07 07 16.511467992       14.727   ~ 1 0
27 UCAC4 416-021524 * 06 51 50.0796 -06 58 57.461     14.223 14.924   ~ 1 0
28 UCAC4 415-021471 * 06 51 50.2944141417 -07 06 03.121857895     12.768 12.823   ~ 1 0
29 TYC 4812-514-1 * 06 51 50.7409394271 -07 04 48.937187041   10.34 10.19 10.386   ~ 1 0
30 UCAC4 415-021476 * 06 51 51.3747556206 -07 07 25.873125426     14.359 14.184   ~ 1 0
31 UCAC4 415-021482 * 06 51 52.2314135196 -07 03 29.459955756     14.108 13.734   ~ 1 0
32 UCAC4 415-021488 * 06 51 52.5110463032 -07 00 56.116240385     14.558 14.300   ~ 1 0
33 BD-06 1780 * 06 51 52.8431882880 -07 04 15.906896944   10.33 10.793 10.878   ~ 4 0
34 UCAC4 415-021490 * 06 51 53.2047559865 -07 06 53.609946568     15.488 14.984   ~ 1 0
35 NGC 2302 OpC 06 51.9 -07 05           ~ 40 0
36 TYC 4812-1032-1 * 06 51 54.0829621583 -07 06 04.339043696   12.05 11.896 11.947   ~ 1 0
37 UCAC4 415-021498 * 06 51 54.4112705247 -07 05 28.559287359     13.176 14.626   ~ 1 0
38 UCAC4 415-021500 * 06 51 54.5264000424 -07 05 22.557892414     12.605 12.803   ~ 1 0
39 UCAC4 415-021503 * 06 51 55.1004427862 -07 03 27.499952879     13.596 13.458   ~ 1 0
40 UCAC4 415-021504 * 06 51 55.1283214877 -07 04 28.634093956       14.677   ~ 1 0
41 TYC 4812-997-1 * 06 51 55.4020801849 -07 04 37.735311302   11.53 11.628 11.691   ~ 1 0
42 UCAC4 415-021516 * 06 51 56.5786912548 -07 02 24.076328096     15.588 15.213   ~ 1 0
43 UCAC4 415-021517 * 06 51 56.6138087260 -07 01 38.798464358     14.272 13.977   ~ 1 0
44 UCAC4 416-021567 * 06 51 57.1481900147 -06 57 20.130746612       15.625   ~ 1 0
45 UCAC4 415-021520 * 06 51 57.1592645208 -07 06 15.434973366     14.559 14.298   ~ 1 0
46 UCAC4 415-021522 * 06 51 57.3035663245 -07 04 01.335171625     14.467 14.025   ~ 1 0
47 TYC 4812-847-1 * 06 51 57.4099860216 -07 01 08.385725527   11.31 11.311 11.351   ~ 1 0
48 TYC 4812-904-1 * 06 51 57.6448706370 -07 05 27.688904988   11.76 11.666 11.807   ~ 1 0
49 UCAC4 416-021573 * 06 51 58.1839262113 -06 58 05.517878153     15.402 14.988   ~ 1 0
50 UCAC4 415-021535 * 06 51 58.4038381660 -07 07 44.137815219     14.378 14.251   ~ 1 0
51 UCAC4 415-021539 * 06 51 58.7862270644 -07 06 24.790497256       13.519   ~ 1 0
52 UCAC4 415-021540 * 06 51 59.1967516162 -07 06 21.742774676       14.451   ~ 1 0
53 UCAC4 415-021547 * 06 52 00.2514123218 -07 03 37.247562384     13.963 13.506   ~ 1 0
54 UCAC4 415-021550 * 06 52 00.7586786171 -07 00 59.740056616     12.897 12.574   ~ 1 0
55 UCAC4 416-021604 * 06 52 03.1859625195 -06 58 03.811863841     15.107 14.753   ~ 1 0
56 TYC 4812-499-1 * 06 52 03.4698486447 -07 04 25.528794289   12.50 11.67 11.806   ~ 1 0
57 UCAC4 415-021569 * 06 52 03.9658073355 -07 02 18.407860366     15.200 14.950   ~ 1 0
58 UCAC4 415-021571 * 06 52 04.0458049530 -07 07 25.162180789     15.509 15.230   ~ 1 0
59 UCAC4 415-021572 * 06 52 04.3329122583 -07 04 57.399994504       13.611   ~ 1 0
60 UCAC4 415-021573 * 06 52 05.2884127949 -07 00 02.362378353     14.430 14.274   ~ 1 0
61 UCAC4 415-021576 * 06 52 05.9462088652 -07 01 04.094111288     15.811 15.704   ~ 1 0
62 UCAC4 415-021582 * 06 52 07.0469902776 -07 02 44.892584592     15.446 15.247   ~ 1 0
63 V* EH Mon Al* 06 52 08.7658418205 -07 03 52.971246487     13.334 13.028   ~ 9 0
64 UCAC4 415-021599 * 06 52 09.6670868583 -07 01 33.880326491     13.685 13.590   ~ 1 0
65 UCAC4 416-021642 * 06 52 09.7884901658 -06 57 59.170995237     15.381 15.137   ~ 1 0
66 UCAC4 415-021606 * 06 52 11.9840637020 -07 04 47.933126922     15.860 15.385   ~ 1 0
67 UCAC4 415-021610 PM* 06 52 12.9243769872 -07 07 49.167572186     15.940 15.691   ~ 1 0
68 UCAC4 415-021611 * 06 52 13.5486021289 -07 07 23.547904092     12.700 12.305   ~ 1 0
69 UCAC4 416-021650 * 06 52 13.5812 -06 59 10.708     15.953 15.715   ~ 1 0
70 UCAC4 415-021613 * 06 52 14.3363442805 -07 05 54.262619208     13.024 12.816   ~ 1 0
71 UCAC4 415-021614 * 06 52 15.0083 -07 06 48.060     14.177 14.263   ~ 1 0
72 UCAC4 416-021656 * 06 52 15.1347248327 -06 58 07.528555214     16.136 16.000   ~ 1 0
73 UCAC4 415-021625 * 06 52 17.1061908866 -07 03 56.775192904     14.130 13.735   ~ 1 0
74 UCAC4 415-021633 * 06 52 18.7013824574 -07 08 07.043793286     15.171 15.386   ~ 1 0
75 2MASS J06521888-0702435 * 06 52 18.8832512565 -07 02 43.519201128           ~ 1 0
76 UCAC4 415-021634 * 06 52 18.9638893094 -07 06 54.224651937       15.679   ~ 1 0
77 NGC 2309 OpC 06 56 08.5 -07 10 30           ~ 17 0
78 NGC 2311 OpC 06 57 47.3 -04 36 36     9.6     ~ 28 0
79 NGC 2335 OpC 07 06 49 -10 01.7   7.76 7.2     ~ 68 0
80 NGC 2343 OpC 07 08 06 -10 37.0   7.05 6.7     ~ 63 0
81 NGC 2353 OpC 07 14 30 -10 16.0   7.30 7.1     ~ 80 0
82 NGC 2367 OpC 07 20 06 -21 52.9   7.98 7.9     ~ 59 0
83 C 0722-261 OpC 07 24 39 -26 13.0   9.90 9.4     ~ 38 0
84 NGC 2383 OpC 07 24 40 -20 56.9   8.88 8.4     ~ 52 0
85 NGC 2384 OpC 07 25 10 -21 01.3   7.47 7.4     ~ 65 0
86 C 0726-153 OpC 07 28 22 -15 24.3   10.81 10.3     ~ 19 0
87 C 0726-152 OpC 07 28 35 -15 21.9   12.60 11.5     ~ 19 0
88 NGC 2401 OpC 07 29 24 -13 58.3     12.6     ~ 20 0
89 NGC 2414 OpC 07 33 12 -15 27.2   8.33 7.9     ~ 66 0
90 NGC 2425 OpC 07 38 15 -14 52.8           ~ 26 0
91 NAME Puppis reg 07 40 -28.0           ~ 80 0
92 NGC 2439 OpC 07 40 45 -31 41.6   7.31 6.9     ~ 129 0
93 NGC 2432 OpC 07 40 53 -19 04.6     10.2     ~ 24 0
94 NGC 2453 OpC 07 47 37 -27 11.6   8.39 8.3     ~ 49 0
95 Cl Haffner 16 OpC 07 50 20 -25 28.0   10.14 10.0     ~ 40 0
96 C 0750-262 OpC 07 52 39 -26 22.8   10.09 9.3     ~ 40 1
97 C 0750-261 OpC 07 52 47 -26 17.0   9.60 9.4     ~ 46 0
98 NGC 2533 OpC 08 07 04 -29 53.0   8.19 7.6     ~ 46 0
99 C 0810-324 OpC 08 12 27 -32 35.0   8.14 7.8     ~ 45 1
100 NGC 2571 OpC 08 18 56 -29 45.0   7.16 7.0     ~ 65 0
101 NGC 2588 OpC 08 23 13 -32 58.2     11.8     ~ 13 0
102 NGC 2635 OpC 08 38 28 -34 45.6   12.06 11.2     ~ 27 0
103 C 0850-374 OpC 08 52 03 -37 36.6           ~ 6 0
104 Cl Ruprecht 158 OpC 08 52 26 -37 33.3           ~ 9 0
105 NAME Sgr Arm PoG 19 00 -30.0           ~ 524 1
106 NGC 6791 OpC 19 20 53 +37 46.3   10.52 9.5     ~ 872 0
107 W 51 SNR 19 23 50 +14 06.0           ~ 1145 1
108 NAME Outer Arm PoG 21 48 +69.4           ~ 223 0
109 NAME Vela Field reg ~ ~           ~ 152 0
110 NAME Local Arm reg ~ ~           ~ 376 0
111 NAME Ori Arm PoG ~ ~           ~ 178 0

    Equat.    Gal    SGal    Ecl

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2020.08.11-13:09:42

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