2009A&A...508..859B


C.D.S. - SIMBAD4 rel 1.7 - 2021.02.24CET19:48:11

2009A&A...508..859B - Astronomy and Astrophysics, volume 508, 859-867 (2009/12-3)

A proto brown dwarf candidate in Taurus.

BARRADO D., MORALES-CALDERON M., PALAU A., BAYO A., DE GREGORIO-MONSALVO I., EIROA C., HUELAMO N., BOUY H., MORATA O. and SCHMIDTOBREICK L.

Abstract (from CDS):

We search for brown dwarfs at the Class 0/I evolutionary stage, or proto brown dwarfs. We present a multi wavelength study, ranging from optical at 0.8µm to radio wavelengths at 6cm, of a cool, very faint, and red multiple object, SSTB213 J041757, detected by Spitzer toward the Barnard 213 dark cloud, in Taurus. The SED of SSTB213 J041757 displays a clear excess at long wavelengths resembling that of a Class I object. The mid-IR source has two possible counterparts, A and B, in the near-IR and optical images, and the 350 µm observations detect clear extended emission, presumably from an envelope around the two sources. The position of A & B in the (Ic-J) versus (J-[3.6]) colour-colour diagram is consistent with them being Galactic sources and not extragalactic contaminants. A proper-motion study confirms this result for A, while it is inconclusive for B. The temperature and mass of the two possible central objects, according to COND evolutionary models, range between 1550-1750K and 3-4MJupiter, and 950-1300K and 1-2MJupiter, for A and B, respectively. The integrated SED provides bolometric temperatures and luminosities of 280K and 0.0034L, assuming that the emission at wavelengths >5µm is associated with component A, and 150K and 0.0033L, assuming that the emission at wavelengths >5µm is associated with component B, which would imply the SSTB213 J041757 object has a luminosity well below the luminosity of other very low luminosity objects discovered up to date. With these characteristics, SSTB213 J041757 seems to be a promising, and perhaps double, proto brown dwarf candidate.

Abstract Copyright:

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

Nomenclature: [BMP2009] SSTB213 J041757.75+274105.5 (N=1). [BMP2009] SSTB213 J041757.75+274105.5 A (Nos A-C).

Simbad objects: 12

goto Full paper

goto View the reference in ADS

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 - 2021
#notes
1 [BMP2009] SSTB213 J041757.75+274105.5 A * 04 17 57.71 +27 41 07.2           M2: 4 1
2 [BMP2009] SSTB213 J041757.75+274105.5 B IR 04 17 57.75 +27 41 04.8           ~ 6 0
3 [BMP2009] SSTB213 J041757.75+274105.5 C BD? 04 17 57.75 +27 41 05.5           ~ 1 0
4 SSTB213 J041757.77+274105.0 BD? 04 17 57.77 +27 41 05.0           ~ 9 1
5 Barnard 213 DNe 04 20 51 +27 16.3           ~ 164 0
6 NAME Tau-Aur Complex SFR 04 30 +25.0           ~ 1245 0
7 V* HL Tau Or* 04 31 38.471952 +18 13 58.08504   15.89 14.49 14.39   K5 1240 0
8 IRAS 04287+1807 mul 04 31 38.8 +18 13 57           ~ 796 0
9 NAME Taurus Complex SFR 04 41.0 +25 52           ~ 3637 0
10 Cl Collinder 69 OpC 05 35 06 +09 56.0     2.8     ~ 240 0
11 ACO 3526 ClG 12 48 51.8 -41 18 21           ~ 990 2
12 NAME LDN 1014 IRS Y*O 21 24 07.58 +49 59 08.9           ~ 76 0

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2009A&A...508..859B and select 'bookmark this link' or equivalent in the popup menu


2021.02.24-19:48:11

© Université de Strasbourg/CNRS

    • Contact