2018MNRAS.480.2386M

Query : 2018MNRAS.480.2386M

2018MNRAS.480.2386M - Mon. Not. R. Astron. Soc., 480, 2386-2404 (2018/October-3)

Young star clusters and the structure of the second Galactic quadrant.

MOLINA LERA J.A., BAUME G. and GAMEN R.

Abstract (from CDS):

Aiming to improve the knowledge of the Galactic structure in the second Galactic quadrant, we selected 10 young open clusters from a sample of more than 200 covered by the SDSS. Our study was based on a photometric data set provided by SDSS and APASS in the visible and by 2MASS and WISE in the infrared. We also carried out spectroscopic observations with GMOS/GEMINI and made use of spectroscopic information available in the literature. The analysis was performed with a suite of tools developed by us to systematically determine the main parameters of the studied clusters, and to identify possible pre-main-sequence populations. We obtained novel parameters and found that the studied clusters are scattered at distances ranging from 1.7 to 8.8 kpc, covering three spiral arms. In particular, we located two of the clusters over the 'Outer Arm' and other two probably belong to the more distant 'New Arm'. Hence, it was possible to get a better picture of the structure of the outer part of the Galaxy. We also obtained traces of coeval star formation processes in all of the selected clusters with a pre-main-sequence population and identified young stellar object candidates in one of them. Regarding the most massive members of the clusters, we discovered 14 B-type stars, eight of them earlier than B3 and another one was identified as a Be star.

Abstract Copyright: © 2018 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): stars: early-type - stars: formation - open clusters and associations - Galaxy: structure

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 Cl Berkeley 7 OpC 01 54 11.7 +62 22 03           ~ 49 0
2 2MASS J01541267+6222454 * 01 54 12.6737665512 +62 22 45.415457616           B5.0V 4 0
3 LS I +62 190 Pu* 01 54 12.9246021336 +62 22 39.795837924   12.50 12.78     B2.0V 14 0
4 LS I +62 191 ** 01 54 15.3491728992 +62 21 55.197687276     11.00 10.87   B1.5III 14 0
5 UCAC4 757-018897 * 01 55 36.8850102048 +61 21 52.372386396     14.75 14.51   B8.0V 4 0
6 Cl Czernik 5 OpC 01 55 42.5 +61 21 13           ~ 24 0
7 UCAC4 757-018925 * 01 55 45.0525878784 +61 21 17.696586024     14.41 14.51   B7.0V 4 0
8 2MASS J02020467+6249397 * 02 02 04.6854464280 +62 49 39.666765864           B5.0V 5 0
9 Cl Czernik 6 OpC 02 02 08.4 +62 50 23           ~ 38 0
10 TYC 4037-454-1 * 02 02 09.6104529216 +62 50 58.844534928   12.70 13.02     B2.0V 5 0
11 BD+62 338 ** 02 02 11.4419501544 +62 50 31.070953284 8.76   9.47 9.32   B3.0III 35 0
12 Cl Czernik 7 OpC 02 02.4 +62 15           ~ 19 0
13 UCAC4 762-016871 * 02 03 08.7722826696 +62 14 32.571444048       14.26   B7.0V 1 0
14 UCAC4 762-016872 * 02 03 09.0415116120 +62 15 55.019050848     13.58 13.49   B3.0V 1 0
15 NAME Per Arm PoG 03 30 +45.0           ~ 1672 0
16 UCAC4 713-030544 * 04 02 18.5644867440 +52 26 15.295817508       15.89   B2.0V 1 0
17 UCAC4 713-030547 * 04 02 18.8618031430 +52 26 19.657047838   14.02 13.11 13.08   B0.0III 4 0
18 DSH J0402.3+5226 OpC 04 02 19.1 +52 26 57           ~ 21 1
19 LBN 151.25+02.12 HII 04 19 41.01 +53 08 31.3           ~ 70 2
20 UCAC4 716-032283 * 04 19 41.5050690744 +53 10 11.808884712       15.80   B3.0V 3 0
21 SDSS J041942.58+531016.9 * 04 19 42.5940266280 +53 10 16.918671936           B6.0V 1 0
22 2MASS J04194278+5310176 EB* 04 19 42.8348881608 +53 10 17.975122536           B1.0V 4 0
23 [KPS2012] MWSC 0365 OpC 04 19 45 +53 10.5           ~ 12 0
24 GSC 03719-00546 * 04 19 51.5593319397 +53 09 28.977375132 13.64 14 13.23     O9.5V 13 1
25 DSH J0542.7+3057A OpC 05 42 45.9 +30 57 33           ~ 12 1
26 NAME Crux-Scutum Spiral Arm reg 12 30 -60.0           ~ 323 0
27 NAME Car-Sgr Arm PoG 15 00 -40.0           ~ 581 1
28 2MASS J21165127+5146073 * 21 16 51.2678135112 +51 46 07.391784396 17.088 16.644 15.079     B3-4III 6 0
29 2MASS J21165138+5144481 s*r 21 16 51.3714480384 +51 44 47.995079856 19.667 16.883 14.046     K0Ib 8 0
30 2MASS J21165450+5145422 * 21 16 54.4940587368 +51 45 42.134191812 19.761 17.353 14.722     G8II 7 0
31 2MASS J21165467+5144458 * 21 16 54.6684558216 +51 44 45.764060424 18.326 17.753 16.199     B4-5IV-V 6 0
32 2MASS J21165645+5146489 SB* 21 16 56.4530936664 +51 46 48.869772744 19.531 17.044 14.203     K4II 7 0
33 Cl Berkeley 55 OpC 21 16 56.6 +51 45 41           ~ 41 0
34 2MASS J21165723+5144226 * 21 16 57.2301305328 +51 44 22.664971356 17.712 17.169 15.645     B5-7III-IV 6 0
35 2MASS J21165758+5145233 * 21 16 57.5829944304 +51 45 23.301256500 18.337 17.665 16.035     B3-5IV-V 3 0
36 2MASS J21165840+5143262 s*r 21 16 58.4131201872 +51 43 26.121636912           K1Ib 5 0
37 2MASS J21165948+5145195 * 21 16 59.4819798360 +51 45 19.525478220 17.905 17.373 15.807     B3-5IV-V 6 0
38 2MASS J21165970+5145535 * 21 16 59.7022915752 +51 45 53.510807700 19.505 17.030 14.397     K0Ib-II 7 0
39 ASASSN-V J211659.94+514556.7 cC* 21 16 59.8973660784 +51 45 58.711092804 17.276 15.785 13.629     F8Ib 20 0
40 2MASS J21170172+5146491 * 21 17 01.7250962208 +51 46 49.180026612 17.879 17.270 15.744     B6-8III 6 0
41 2MASS J21170229+5146581 * 21 17 02.2980363504 +51 46 58.200459960 16.641 16.139 14.613     B3-4III 6 0
42 2MASS J21170291+5145280 * 21 17 02.9152153368 +51 45 27.961139340 18.108 17.413 15.768     B5-7III-IV 6 0
43 NAME Outer Arm PoG 21 48 +69.4           ~ 370 0
44 [RHM2011] 10 * 22 58 40.4401370736 +58 47 06.071749836           B5V 2 0
45 SH 2-152 HII 22 58 40.8107767416 +58 46 59.226036024           ~ 147 1
46 [BDS2003] 36 Cl* 22 58 41 +58 46.9           ~ 3 0
47 [RHM2011] 3 * 22 58 42.1975496472 +58 45 32.992894008           B2-3V 3 0
48 [RHM2011] 4 * 22 58 42.2188175808 +58 45 45.861925788           B2-3V 3 0
49 [RHM2011] 11 * 22 58 42.9165082368 +58 47 26.859897204           G6.5V 2 0
50 [RHM2011] 13 * 22 58 43.0667614536 +58 48 36.191835072           G8-9III 2 0
51 [RHM2011] 5 * 22 58 47.0810936568 +58 46 20.135570520           B2V 3 0
52 [RHM2011] 12 * 22 58 48.0518481888 +58 48 00.215033040           G8V 2 0
53 [RHM2011] 1 * 22 58 48.78648 +58 44 53.8620           B1V 2 0
54 BFS 18 HII 23 06.3 +60 16           ~ 9 0
55 [BDS2003] 42 OpC 23 06 22 +60 16.2           ~ 4 0
56 NAME Ori Arm PoG ~ ~           ~ 218 0
57 NAME Local Arm reg ~ ~           ~ 649 0
58 NAME Norma-Cygnus Arm reg ~ ~           ~ 79 0

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