Research articles

search articles

My Pages

Stat

Members: 3645
Articles: 2'506'133
Articles rated: 2609

26 April 2024

» arxiv » 1501.1330

Article overview

The Gaia-ESO Survey: Discovery of a spatially extended low-mass population in the Vela OB2 association
G.G. Sacco ; R.D. Jeffries ; S. Randich ; E. Franciosini ; R.J. Jackson ; M. Cottaar ; L. Spina ; F. Palla ; M. Mapelli ; E.J. Alfaro ; R. Bonito ; F. Damiani ; A. Frasca ; A. Klutsch ; A. Lanzafame ; A. Bayo ; D. Barrado ; F. Jimenez-Esteban ; G. Gilmore ; G. Micela ; A. Vallenari ; C. Allende Prieto ; E. Flaccomio ; G. Carraro ; M.T. Costado ; P. Jofre ; C. Lardo ; L. Magrini ; L. Morbidelli ; L. Prisinzano ; L. Sbordone ;
Date:	6 Jan 2015
Abstract:	The nearby (distance~350-400 pc), rich Vela OB2 association, includes $gamma^2$ Velorum, one of the most massive binaries in the solar neighbourhood and an excellent laboratory for investigating the formation and early evolution of young clusters. Recent Gaia-ESO survey observations have led to the discovery of two kinematically distinct populations in the young (10-15 Myr) cluster immediately surrounding $gamma^2$ Velorum. Here we analyse the results of Gaia-ESO survey observations of NGC 2547, a 35 Myr cluster located two degrees south of $gamma^2$ Velorum. The radial velocity distribution of lithium-rich pre-main sequence stars shows a secondary population that is kinematically distinct from and younger than NGC 2547. The radial velocities, lithium absorption lines, and the positions in a colour-magnitude diagram of this secondary population are consistent with those of one of the components discovered around $gamma^2$ Velorum. This result shows that there is a young, low-mass stellar population spread over at least several square degrees in the Vela OB2 association. This population could have originally been part of a cluster around $gamma^2$ Velorum that expanded after gas expulsion or formed in a less dense environment that is spread over the whole Vela OB2 region.
Source:	arXiv, 1501.1330
Services:	Forum \| Review \| PDF \| Favorites

No review found.

Did you like this article?

This article or document is ...
important:
of broad interest:
readable:
new:
correct:
Global appreciation:

Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.

browser Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)

ScienXe.org
» my Online CV
» Free

News, job offers and information for researchers and scientists:

home

contact

sitemap