2008A&A...486..877B


C.D.S. - SIMBAD4 rel 1.7 - 2019.10.23CEST16:08:20

2008A&A...486..877B - Astronomy and Astrophysics, volume 486, 877-890 (2008/8-2)

Structural and compositional properties of brown dwarf disks: the case of 2MASS J04442713+2512164.

BOUY H., HUELAMO N., PINTE C., OLOFSSON J., BARRADO Y NAVASCUES D., MARTIN E.L., PANTIN E., MONIN J.-L., BASRI G., AUGEREAU J.-C., MENARD F., DUVERT G., DUCHENE G., MARCHIS F., BAYO A., BOTTINELLI S., LEFORT B. and GUIEU S.

Abstract (from CDS):

To improve our understanding of substellar formation, we have performed a compositional and structural study of a brown dwarf disk. We present the results of photometric, spectroscopic, and imaging observations of 2MASS J04442713+2512164, a young brown dwarf (M7.25) member of the Taurus association. Our dataset, combined with results from the literature, provides a complete coverage of the spectral energy distribution from the optical range to the millimeter, including the first photometric measurement of a brown dwarf disk at 3.7mm, and allows us to perform a detailed analysis of the disk properties. The target was known to have a disk. High-resolution optical spectroscopy shows that it is accreting intensely, and powers both a jet and an outflow. The disk structure is similar to what is observed for more massive TTauri stars. Spectral decomposition models of Spitzer/IRS spectra suggest that the mid-infrared emission from the optically thin disk layers is dominated by grains with intermediate sizes (1.5µm). Crystalline silicates are significantly more abundant in the outer part and/or deeper layers of the disk, implying very efficient mixing and/or additional annealing processes. Submillimeter and millimeter data indicate that most of the disk mass is in large grains (>1mm).

Abstract Copyright:

Journal keyword(s): stars: low-mass, brown dwarfs - stars: circumstellar matter - stars: formation

CDS comments: Paragraph. 2.3 reference star 2MASS J04441794+2524513 is 2MASS J04441794+2524512 is Simbad. Fig.9 star Par-Lup-3-1 is NAME SST-Lup3-1 in Simbad.

Simbad objects: 12

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Number of rows : 12

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2019
#notes
1 3C 84 Sy2 03 19 48.1597607660 +41 30 42.114155434   13.10 12.48 11.09   ~ 3461 3
2 3C 111 Sy1 04 18 21.2773655604 +38 01 35.801523843   19.75 18.05     ~ 839 1
3 NAME Taurus Dark Cloud SFR 04 41.0 +25 52           ~ 3310 0
4 2MASS J04441794+2524512 * 04 44 17.9468346612 +25 24 51.221756959           M4III 16 0
5 IRAS S04414+2506 BD* 04 44 27.1421731772 +25 12 16.439761677           M7e 59 0
6 QSO B0507+179 QSO 05 10 02.36912982 +18 00 41.5816534   20.0 19.0 19.09   ~ 276 1
7 QSO J0530+13 QSO 05 30 56.41672 +13 31 55.1495     20.0 19.35   ~ 871 1
8 NAME Cha I MoC 11 06 48 -77 18.0           ~ 936 1
9 NAME Lupus III SFR 16 09.6 -39 03           ~ 262 0
10 2MASS J16115979-3823383 TT* 16 11 59.7951623767 -38 23 38.375533996   18.17 16.55 16.24 14.26 M5.0e 34 0
11 VB 8 Fl* 16 55 35.2561420232 -08 23 40.752903617   18.7 16.916 14.566 12.24 M7Ve 372 0
12 VB 10 Fl* 19 16 57.6103282334 +05 09 01.588675251   19.42 17.30     M8V 426 1

    Equat.    Gal    SGal    Ecl

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2019.10.23-16:08:20

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