The number fraction of discs around brown dwarfs in Orion OB1a and the 25 Orionis group | Zendy

Juan José Downes | Zendy; C. Román-Zúñiga | Zendy; Javier BallesterosParedes | Zendy; Cecilia Mateu | Zendy; César Briceño | Zendy; Jesús Hernández | Zendy; M. G. Petr-Gotzens | Zendy; Nuria Calvet | Zendy; Lee Hartmann | Zendy; Karina Maucó | Zendy

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The number fraction of discs around brown dwarfs in Orion OB1a and the 25 Orionis group

Author(s) -

Juan José Downes,

C. Román-Zúñiga,

Javier BallesterosParedes,

Cecilia Mateu,

César Briceño,

Jesús Hernández,

M. G. Petr-Gotzens,

Nuria Calvet,

Lee Hartmann,

Karina Maucó

Publication year - 2015

Publication title -

monthly notices of the royal astronomical society

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.058

H-Index - 383

eISSN - 1365-8711

pISSN - 0035-8711

DOI - 10.1093/mnras/stv888

Subject(s) - physics , brown dwarf , astrophysics , t tauri star , stars , low mass , stellar classification , star formation , astronomy

We present a study of 15 new brown dwarfs belonging to the ∼7 Myr old 25 Orionis group and Orion OB1a subassociation with spectral types between M6 and M9 and estimated masses between ∼0.07 and ∼0.01 M⊙. By comparing them through a Bayesian method with low-mass stars (0.8 ≲ M/M⊙ ≲ 0.1) from previous works in the 25 Orionis group, we found statistically significant differences in the number fractio...

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