O stars of the Galactic starburst NGC 3603

DOI

The very bright and compact massive young cluster, NGC 3603, has been cited as an example of a starburst in the Milky Way and compared with the much-studied R136/30 Doradus region in the Large Magellanic Cloud. Here we build on the discovery by Mohr-Smith et al. of a large number of reddened O stars around this cluster. We construct a list of 288 candidate O stars with proper motions (PMs), in a region of sky spanning 1.5x1.5deg^2^ centred on NGC 3603, by cross-matching the Mohr-Smith et al. catalogue with Gaia DR2. This provides the basis for a first comprehensive examination of the PMs of these massive stars in the halo of NGC 3603, relative to the much better studied central region. We identify up to 11 likely O star ejections - 8 of which would have been ejected between 0.60 and 0.95Myr ago (supporting the age of ~1Myr that has been attributed to the bright cluster centre). Seven candidate ejections are arranged in a partial ring to the south of the cluster core spanning radii of 9-18arcmin (18-36pc if the cluster is 7kpc away). We also show that the cluster has a halo of a further ~100 O stars extending to a radius of at least 5arcmin, adding to the picture of NGC 3603 as a scaled down version of the R136/30 Dor region.

Cone search capability for table J/MNRAS/486/1034/tableb1 (Complete 288 candidate O stars obtained by cross-matching MS-II and Gaia DR2)

Identifier
DOI http://doi.org/10.26093/cds/vizier.74861034
Source https://dc.g-vo.org/rr/q/lp/custom/CDS.VizieR/J/MNRAS/486/1034
Related Identifier https://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/486/1034
Related Identifier http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/486/1034
Metadata Access http://dc.g-vo.org/rr/q/pmh/pubreg.xml?verb=GetRecord&metadataPrefix=oai_b2find&identifier=ivo://CDS.VizieR/J/MNRAS/486/1034
Provenance
Creator Drew J.E.; Monguio M.; Wright N.J.
Publisher CDS
Publication Year 2022
Rights https://cds.unistra.fr/vizier-org/licences_vizier.html
OpenAccess true
Contact CDS support team <cds-question(at)unistra.fr>
Representation
Resource Type Dataset; AstroObjects
Discipline Astrophysics and Astronomy; Galactic and extragalactic Astronomy; Natural Sciences; Observational Astronomy; Physics; Stellar Astronomy