| | |
| | |
Stat |
Members: 3645 Articles: 2'504'928 Articles rated: 2609
25 April 2024 |
|
| | | |
|
Article overview
| |
|
CoRoT 223992193: A new, low-mass, pre-main sequence eclipsing binary with evidence of a circumbinary disk | Edward Gillen
; Suzanne Aigrain
; Amy McQuillan
; Jerome Bouvier
; Simon Hodgkin
; Silvia H. P. Alencar
; Caroline Terquem
; John Southworth
; Neale P. Gibson
; Ann Marie Cody
; Monika Lendl
; Maria Morales-Calderón
; Fabio Favata
; John Stauffer
; Giuseppina Micela
; | Date: |
15 Nov 2013 | Abstract: | We present the discovery of CoRoT 223992193, a double-lined, detached
eclipsing binary, comprising two pre-main sequence M dwarfs, discovered by the
CoRoT space mission during a 23-day observation of the 3 Myr old NGC 2264
star-forming region. Using multi-epoch optical and near-IR follow-up
spectroscopy with FLAMES on the Very Large Telescope and ISIS on the William
Herschel Telescope we obtain a full orbital solution and derive the fundamental
parameters of both stars by modelling the light curve and radial velocity data.
The orbit is circular and has a period of $3.8745745 pm 0.0000014$ days. The
masses and radii of the two stars are $0.67 pm 0.01$ and $0.495 pm 0.007$
$M_{odot}$ and $1.30 pm 0.04$ and $1.11 ~^{+0.04}_{-0.05}$ $R_{odot}$,
respectively. This system is a useful test of evolutionary models of young
low-mass stars, as it lies in a region of parameter space where observational
constraints are scarce; comparison with these models indicates an apparent age
of $sim$3.5-6 Myr. The systemic velocity is within $1sigma$ of the cluster
value which, along with the presence of lithium absorption, strongly indicates
cluster membership. The CoRoT light curve also contains large-amplitude,
rapidly evolving out-of-eclipse variations, which are difficult to explain
using starspots alone. The system’s spectral energy distribution reveals a
mid-infrared excess, which we model as thermal emission from a small amount of
dust located in the inner cavity of a circumbinary disk. In turn, this opens up
the possibility that some of the out-of-eclipse variability could be due to
occultations of the central stars by material located at the inner edge or in
the central cavity of the circumbinary disk. | Source: | arXiv, 1311.3990 | Services: | Forum | Review | PDF | Favorites |
|
|
No review found.
Did you like this article?
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)
|
| |
|
|
|
| News, job offers and information for researchers and scientists:
| |