Exploring Brown Dwarf Disks

Abstract

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. 2000; Persi et al. 2000). One of these stars (Cha Halpha1) is a bona-fide brown dwarf, with mass 0.04-0.05 Msun. 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.

4 pages, 4 figures, A&A Letters in press

References in corpus (3)

• The Formation of Brown Dwarfs as Ejected Stellar Embryos
• Evidence for Circumstellar Disks around Young Brown Dwarfs in the Trapezium Cluster
• A Three Micron Survey of the Chamaeleon I Dark Cloud

Cited by in corpus (84)

• Embedded Clusters in Molecular Clouds
• The James Webb Space Telescope
• The Formation of a Star Cluster: Predicting the Properties of Stars and Brown Dwarfs
• Very Low Mass Stars and Brown Dwarfs in Taurus-Auriga
• From Molecular Cores to Planet-forming Disks: A SIRTF Legacy Program
• Stellar, brown dwarf and multiple star properties from a radiation hydrodynamical simulation of star cluster formation
• Accretion in Brown Dwarfs: an Infrared View
• The Luminosity & Mass Function of the Trapezium Cluster: From B stars to the Deuterium Burning Limit
• The "Mysterious" Origin of Brown Dwarfs
• An empirical criterion to classify T Tauri stars and substellar analogs using low-resolution optical spectroscopy
• The Formation and Early Evolution of Low-mass Stars and Brown Dwarfs
• Characterizing Young Brown Dwarfs using Low Resolution Near-IR Spectra
• The Disk Population of the Chamaeleon I Star-Forming Region
• A Disk Census for Young Brown Dwarfs
• Gravity Indicators in the Near-Infrared Spectra of Brown Dwarfs
• Rotation and accretion of very low mass objects in the SigmaOri cluster
• Near-infrared cross-dispersed spectroscopy of brown dwarf candidates in the Upper Sco association
• Tracing the Mass during Low-Mass Star Formation, IV: Observations and Modeling of the Submillimeter Continuum Emission from Class I Protostars
• Young, Low-Mass Brown Dwarfs with Mid-Infrared Excesses
• A Survey for Circumstellar Disks Around Young Substellar Objects
• 17 new very low-mass members in Taurus. The brown dwarf deficit revisited
• Direct evidence of a sub-stellar companion around CT Cha
• Brown dwarf disks with ALMA: evidence for truncated dust disks in Ophiuchus
• Evolution of Young Brown Dwarf Disks in the Mid-Infrared
• Brown dwarf disks with ALMA
• The Disk Fractions of Brown Dwarfs in IC 348 and Chamaeleon I
• The young stellar population in the Serpens Cloud Core: An ISOCAM survey
• New Low-Mass Stars and Brown Dwarfs with Disks in the Chamaeleon I Star-Forming Region
• Very Low-Mass Objects in the Coronet Cluster: The Realm of the Transition Disks
• The stellar mass-accretion rate relation in T Tauri stars and brown dwarfs
• The substellar mass function in sigma Orionis. II. Optical, near-infrared and IRAC/Spitzer photometry of young cluster brown dwarfs and planetary-mass objects
• The First Detailed Look at a Brown Dwarf Disk
• Pebble-driven Planet Formation around Very Low-mass Stars and Brown Dwarfs
• Rotation and variability of very low mass stars and brown dwarfs near Epsilon Ori
• Discovery of a Bipolar Outflow from 2MASSW J1207334-393254, A 24 Jupiter Mass Brown Dwarf
• Spectroscopy of Very Low Mass Stars and Brown Dwarfs in the Lambda Orionis Star Forming Region
• Optical Linear Polarization of Late M- and L-Type Dwarfs
• Photometric variability of young brown dwarfs in the sigma Orionis open cluster
• ALMA observations of rho-Oph 102: grain growth and molecular gas in the disk around a young Brown Dwarf
• The Decay of Accreting Triple Systems as Brown Dwarf Formation Scenario
• The brown dwarf population in the Chamaeleon I cloud
• The Structure of Brown Dwarf Circumstellar Disks
• No disks around low-mass stars and brown dwarfs in the young sigma Orionis cluster?
• Grain growth and dust settling in a brown dwarf disk: Gemini/T-ReCS observations of CFHT-BD-Tau 4
• Spitzer Identification of the Least Massive Known Brown Dwarf with a Circumstellar Disk
• Brown dwarf formation by binary disruption
• Flared Disks and Silicate Emission in Young Brown Dwarfs
• Companions of old brown dwarfs, and very low mass stars
• A Young Very Low-Mass Object surrounded by warm dust
• Demographics of disks around young very low-mass stars and brown dwarfs in Lupus
• HST, VLT, and NTT imaging search for wide companions to bona-fide and candidate brown dwarfs in the Cha I dark cloud
• Radiation thermo-chemical models of protoplanetary discs. III. Impact of inner rims on Spectral Energy Distributions
• Probing Dust around Brown Dwarfs: The naked LP 944-20 and the Disk of Cha Ha2
• Young massive stars in the ISOGAL survey II. The catalogue of bright YSO candidates
• X-ray Emission near the Substellar Limit: The sigma Orionis and Taurus Star Forming Regions
• Mass loss at the lowest stellar masses
• Sequential star formation at the periphery of the HII regions Sh 217 and Sh 219
• First millimeter detection of the disk around a young, isolated, planetary-mass object
• Very low-mass members of the Lupus 3 cloud
• The very low-mass population of the Corona Australis and Chamaeleon II star forming regions
• ALMA Observations of the Young Substellar Binary System 2M1207
• A young binary Brown Dwarf in the R-CrA star formation region
• The bipolar outflow and disk of the brown dwarf ISO217
• Brown dwarf disks with Herschel: Linking far-infrared and (sub)-mm fluxes
• Disk Masses and Dust Evolution of Protoplanetary Disks Around Brown Dwarfs
• Uncovering the Outflow Driven by the Brown Dwarf LS-RCr A1: H-alpha as a Tracer of Outflow Activity in Brown Dwarfs
• Spectral energy distribution simulations of a possible ring structure around the young, red brown dwarf G196-3B
• A mid-infrared study of very low mass stars and brown dwarfs in Upper Scorpius
• Submillimeter Observations of the Young Low-Mass Object IRAS 04158+2805
• Modeling the Protoplanetary Disks of Two Brown Dwarfs in the Taurus Molecular Cloud
• Looking for outflows from brown dwarfs
• A giant planet shaping the disk around the very low-mass star CIDA 1
• VLA observations of the disk around the young brown dwarf 2MASS J044427+2512
• Optical spectra of selected Chamaeleon I young stellar objects
• An IPHAS-based search for accreting very low-mass objects using VO tools
• ALMA observations of the early stages of substellar formation in the Lupus 1 and 3 molecular clouds
• High resolution spectroscopy of Brown Dwarfs in Taurus: Detection of accretion in KPNO Tau 3
• Disks, accretion and outflows of brown dwarfs
• MINDS. Cha Hα 1, a brown dwarf with a hydrocarbon-rich disk
• Confirmation of the binary status of Cha Halpha 2 - a very young low-mass binary in Chamaeleon
• A search for water maser emission from brown dwarfs and low-luminosity young stellar objects
• Effects of Rotation on the Spectra of Brown Dwarfs
• New constraints on the presence of debris disks around G 196-3 B and VHS J125601.92-125723.9 b
• Young stars and their circumstellar disks in the Sigma Orionis cluster