2016MNRAS.455.4031C


Query : 2016MNRAS.455.4031C

2016MNRAS.455.4031C - Mon. Not. R. Astron. Soc., 455, 4031-4045 (2016/February-1)

The complex stellar populations in the background of open clusters in the third Galactic quadrant.

CARRARO G., SELEZNEV A.F., BAUME G. and TURNER D.G.

Abstract (from CDS):

Multicolour photometry of the stellar populations in five fields in the third Galactic quadrant centred on the clusters NGC 2215, NGC 2354, Haffner 22, Ruprecht 11, and ESO489 SC01 is interpreted in terms of a warped and flared Galactic disc, without resort to an external entity such as the popular Monoceros or Canis Major overdensities. Except for NGC 2215, the clusters are poorly or unstudied previously. The data generate basic parameters for each cluster, including the distribution of stars along the line of sight. We use star counts and photometric analysis, without recourse to Galactic-model-based predictions or interpretations, and confirms earlier results for NGC 2215 and NGC 2354. ESO489 SC01 is not a real cluster, while Haffner 22 is an overlooked cluster aged ∼ 2.5 Gyr.
Conclusion. for Ruprecht 11 are preliminary, evidence for a cluster being marginal. Fields surrounding the clusters show signatures of young and intermediate-age stellar populations. The young population background to NGC 2354 and Ruprecht 11 lies ∼ 8-9 kpc from the Sun and ∼ 1 kpc below the formal Galactic plane, tracing a portion of the Norma-Cygnus arm, challenging Galactic models that adopt a sharp cut-off of the disc 12-14 kpc from the Galactic Centre. The old population is metal-poor with an age of ∼ 2-3 Gyr, resembling star clusters like Tombaugh 2 or NGC 2158. It has a large colour spread and is difficult to locate precisely. Young and old populations follow a pattern that depends critically on the vertical location of the thin and/or thick disc, and whether or not a particular line of sight intersects one, both, or none.

Abstract Copyright: © 2015 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2015)

Journal keyword(s): Galaxy: disc - open clusters and associations: general - open clusters and associations: individual: NGC 2215 - open clusters and associations: individual: NGC 2354 - open clusters and associations: individual: Haffner 22 - open clusters and associations: individual: Ruprecht 11 - open clusters and associations: individual: ESO489 SC01 - Galaxy: structure

Simbad objects: 21

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Number of rows : 21
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 NAME Per Arm PoG 03 30 +45.0           ~ 1338 0
2 Cl Melotte 22 OpC 03 46 24 +24 06.8           ~ 3132 0
3 NAME Gal Anticenter reg 05 46 +28.9           ~ 787 0
4 ESO 489-1 OpC 06 04 58 -26 44.1           ~ 8 0
5 NGC 2158 OpC 06 07 27 +24 05.9           ~ 257 0
6 NGC 2215 OpC 06 20 48 -07 16.6   8.85 8.45     ~ 47 0
7 SA 98- reg 06 52 04.1 -00 23 58           ~ 170 0
8 NGC 2315 rG 07 02 33.038 +50 35 26.18   14.5       ~ 28 0
9 Cl Haffner 2 OpC 07 03 06 -20 49.2           ~ 111 0
10 C 0705-207 OpC 07 07 22 -20 47.7           ~ 7 0
11 NAME CMa Dwarf Galaxy G 07 12.6 -27 40     -0.1     ~ 194 1
12 NGC 2354 OpC 07 14 01 -25 43.4   7.28 6.5     ~ 78 0
13 C 0725-310 OpC 07 26 56 -31 09.3           ~ 6 0
14 NGC 2420 OpC 07 38 24 +21 34.5   9.0 8.3     ~ 420 0
15 NGC 2453 OpC 07 47 35 -27 11.6   8.39 8.3     ~ 54 0
16 NGC 2506 OpC 08 00 02 -10 46.4   8.28 7.6     ~ 236 0
17 Cl Haffner 22 OpC 08 12 26 -27 54.8           ~ 14 0
18 IC 4651 OpC 17 24 51 -49 55.0           ~ 324 0
19 NAME Galactic Center gam 17 45 39.60213 -29 00 22.0000           ~ 12532 0
20 NAME Monoceros Stream St* ~ ~           ~ 330 0
21 NAME Norma-Cygnus Arm reg ~ ~           ~ 76 0

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2021.11.29-01:01:24

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