2018MNRAS.481L..11B


Query : 2018MNRAS.481L..11B

2018MNRAS.481L..11B - Mon. Not. R. Astron. Soc., 481, L11 (2018/November-3)

A sextet of clusters in the Vela OB2 region revealed by Gaia.

BECCARI G., BOFFIN H.M.J., JERABKOVA T., WRIGHT N.J., KALARI V.M., CARRARO G., DE MARCHI G. and DE WIT W.-J.

Abstract (from CDS):

Using Gaia DR2 data, combined with OmegaCAM ground-based optical photometry from the Accretion Disc with OmegaCAM survey, and detailed radial velocity measurements from ESO-Gaia, we analyse in detail a 10 x 5 deg region around the Wolf-Rayet Star γ2 Vel, including the previously known clusters Gamma Vel and NGC2547. Using clustering analysis that considers positions, proper motions, and parallax, we discover six clusters or associations - four of which appear new. Analysis of the colour-magnitude diagram for these clusters shows that four of them formed coevally from the same molecular clouds 10 Myr ago, while NGC 2547 formed together with a newly discovered cluster 30 Myr ago. This study shows the incredible wealth of data provided by Gaia for the study of young stellar clusters.

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

Journal keyword(s): stars: formation - stars: pre-main-sequence - open clusters and associations

Nomenclature: Table 1: [BBJ2018] N (Nos 1-6).

Simbad objects: 9

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Number of rows : 9
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 Magellanic Clouds GrG 03 00 -71.0           ~ 6423 1
2 [BBJ2018] 1 Cl* 07 49 27.948 -46 20 23.92           ~ 1 0
3 [BBJ2018] 2 Cl* 07 58 15.914 -49 12 43.47           ~ 1 0
4 [BBJ2018] 6 Cl* 07 59 59.811 -46 31 30.05           ~ 1 0
5 Ass Vel OB 2 As* 08 09 22.478 -47 21 03.46           ~ 248 0
6 * gam02 Vel WR* 08 09 31.95013 -47 20 11.7108 0.64 1.58 1.83 1.85 2.00 WC8+O7.5III-V 872 0
7 NGC 2547 OpC 08 09 52.360 -49 10 35.01           ~ 366 0
8 [BBJ2018] 5 Cl* 08 12 03.162 -46 24 00.83           ~ 1 0
9 Ass Cyg OB 2 As* 20 33.2 +41 19           ~ 882 0

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2022.10.05-21:36:54

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