2009A&A...498..419S


C.D.S. - SIMBAD4 rel 1.7 - 2019.12.13CET09:12:51

2009A&A...498..419S - Astronomy and Astrophysics, volume 498, 419-423 (2009/5-1)

On the possible generation of the young massive open clusters Stephenson 2 and BDSB 122 by ω Centauri.

SALERNO G.M., BICA E., BONATTO C. and RODRIGUES I.

Abstract (from CDS):

Passing through the disk of a galaxy, a massive object such as a globular cluster can trigger star formation. We test the hypothesis that the most massive globular cluster in the Galaxy, ωCentauri, which crossed the disk approximately 24±2Myr ago, may have triggered the formation of the open clusters Stephenson 2 and BDSB 122. The orbits of ω Centauri, Stephenson 2, and BDSB 122 are computed for the three-component model of Johnston, Hernquist & Bolte (1996ApJ...465..278J), which considers the disk, spheroidal, and halo gravitational potentials. With the reconstructed orbit of ω Centauri, we show that the latest impact site is consistent, within significant uncertainties, with the birth-site of the young massive open clusters BDSB 122 and Stephenson 2. Within the uncertainties, this scenario is consistent with the timescale of their backward motion in the disk, shock propagation and delayed star formation. Together with open cluster formation associated with density waves in spiral arms, the present results are consistent with massive globular clusters being additional progenitors of open clusters, the most massive ones in particular.

Abstract Copyright:

Journal keyword(s): galaxy: globular clusters: individual: omega Centauri - galaxy: open clusters and associations: individual: BDSB 122 - galaxy: open clusters and associations: individual: Stephenson 2

Simbad objects: 19

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Number of rows : 19

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 Cartwheel G 00 37 41.107 -33 42 58.79   19.26   18.52   ~ 247 1
2 W 3 MoC 02 27 04.10 +61 52 27.1           ~ 945 3
3 [FSR2007] 0584 OpC 02 27 15.0 +61 37 28           ~ 20 0
4 NAME Per Arm PoG 03 30 +45.0           ~ 1202 0
5 NAME Crux-Scutum Spiral Arm reg 12 30 -60.0           ~ 265 0
6 NGC 4559 H2G 12 35 57.6399424117 +27 57 35.859639262   10.46 10.01     ~ 522 1
7 NGC 5139 GlC 13 26 47.28 -47 28 46.1   6.12 5.33     ~ 2923 0
8 NAME Car-Sgr Arm PoG 15 00 -40.0           ~ 412 1
9 NAME Nor Arm PoG 16 00 -50.0           ~ 318 0
10 NGC 6231 OpC 16 54 08.51 -41 49 36.0   2.83 2.6     ~ 475 0
11 [DBS2003] 122 Cl* 17 17 02 -36 21.0           ~ 7 0
12 NGC 6397 GlC 17 40 42.09 -53 40 27.6   7.39 5.17     ~ 1762 1
13 NAME Gal Center reg 17 45 40.04 -29 00 28.1           ~ 11087 0
14 RSGC 1 OpC 18 37 58 -06 53.0           ~ 84 0
15 Cl Stephenson 2 OpC 18 39 20 -06 01.7           ~ 80 0
16 NGC 6946 H2G 20 34 52.332 +60 09 13.24   10.5       ~ 2190 2
17 NAME Cyg Superbubble PoC 20 47 +41.2           ~ 72 1
18 NAME Outer Arm PoG 21 48 +69.4           ~ 206 0
19 NAME Local Arm reg ~ ~           ~ 346 0

    Equat.    Gal    SGal    Ecl

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2019.12.13-09:12:51

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