2001A&A...376L..22N


Query : 2001A&A...376L..22N

2001A&A...376L..22N - Astronomy and Astrophysics, volume 376, L22-25 (2001/9-3)

Exploring brown dwarf disks.

NATTA A. and TESTI L.

Abstract (from CDS):

We discuss the spectral energy distribution of three very low mass objects in Chamaeleon I for which ground-based spectroscopy and photometry as well as ISO measurements in the mid-infrared are available (Comeron et al., 2000A&A...359..269C; Persi et al., 2000A&A...357..219P). One of these stars (Cha Hα1) is a bona-fide brown dwarf, with mass 0.04-0.05M. We show that the observed emission is very well described by models of circumstellar disks identical to those associated to T Tauri stars, scaled down to keep the ratio of the disk-to-star mass constant and to the appropriate stellar parameters. This result provides a first indication that the formation mechanism of T Tauri stars (via core contraction and formation of an accretion disk) extends to objects in the brown dwarf mass range.

Abstract Copyright:

Journal keyword(s):

Simbad objects: 5

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Number of rows : 5
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 2MASS J04181710+2828419 TT* 04 18 17.1091861192 +28 28 41.921033525     22.175     M6.4 77 0
2 NAME Cha 1 MoC 11 06 48 -77 18.0           ~ 1022 1
3 [NC98] Cha HA 1 Y*O 11 07 16.6694944374 -77 35 53.222755937   22.8 21.0   16.38 M7.5/8e 83 0
4 [NC98] Cha HA 9 BD* 11 07 18.5742862738 -77 32 51.553842979     23.1   17.57 M5.5e 48 0
5 V* HK Cha Or* 11 07 42.3440888366 -77 33 59.381952754   21.9 19.8   15.26 ~ 76 0

    Equat.    Gal    SGal    Ecl

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2021.07.26-23:30:30

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