A Herschel Search For Cold Dust in Brown Dwarf Disks: First Results

Abstract

We report initial results from a {\it Herschel} program to search for far-infrared emission from cold dust around a statistically significant sample of young brown dwarfs. The first three objects in our survey are all detected at 70\micron, and we report the first detection of a brown dwarf at 160\micron. The flux densities are consistent with the presence of substantial amounts of cold dust in the outer disks around these objects. We modeled the SED's with two different radiative transfer codes. We find that a broad range of model parameters provides a reasonable fit to the SED's, but that the addition of our 70\micron, and especially the 160\micron\ detection enables strong lower limits to be placed on the disk masses since most of the mass is in the outer disk. We find likely disk masses in the range of a few $\times 10^{-6}$ to $10^{-4}$ \msun. Our models provide a good fit to the SED's and do not require dust settling.

References in corpus (15)

• Herschel Space Observatory - An ESA facility for far-infrared and submillimetre astronomy
• The Photodetector Array Camera and Spectrometer (PACS) on the Herschel Space Observatory
• Monte Carlo radiative transfer in protoplanetary disks
• A Submillimeter View of Circumstellar Dust Disks in $\rho$ Ophiuchus
• Exploring brown dwarf disks: A 1.3 mm survey in Taurus
• The Disk Population of the Chamaeleon I Star-Forming Region
• The Planetary Mass Companion 2MASS1207-3932 B: Temperature, Mass and Evidence for an Edge-On Disk
• Evidence Against an Edge-On Disk Around the Extrasolar Planet 2MASS 1207 b and a New Thick Cloud Explanation for its Under-Luminosity
• Substellar Objects in Nearby Young Clusters (SONYC): The bottom of the Initial Mass Function in NGC1333
• An Improbable Solution to the Underluminosity of 2M1207B: A Hot Protoplanet Collision Afterglow
• An accurate distance to 2M1207Ab
• SSPMJ1102-3431 brown dwarf characterization from accurate proper motion and trigonometric parallax
• New Brown Dwarf Disks in the TW Hydrae Association
• Structural and compositional properties of brown dwarf disks: the case of 2MASS J04442713+2512164
• Protoplanetary Disk Masses in IC348: A Rapid Decline in the Population of Small Dust Grains After 1 Myr

Cited by in corpus (23)

• The Formation and Early Evolution of Low-mass Stars and Brown Dwarfs
• Protoplanetary Disk Masses from Stars to Brown Dwarfs
• Explaining millimeter-sized particles in brown dwarf disks
• A Herschel Survey of Cold Dust in Disks Around Brown Dwarfs and Low-Mass Stars
• Dust masses of disks around 8 Brown Dwarfs and Very Low-Mass Stars in Upper Sco OB1 and Ophiuchus
• The Herschel DIGIT Survey of Weak-line T Tauri Stars: implications for disk evolution and dissipation
• A search for pre-substellar cores and proto-brown dwarf candidates in Taurus: multiwavelength analysis in the B213-L1495 clouds
• JWST/NIRSpec Observations of the Planetary Mass Companion TWA 27B
• Hints for Small Disks around Very Low-Mass Stars and Brown Dwarfs
• First millimeter detection of the disk around a young, isolated, planetary-mass object
• ALMA Observations of the Young Substellar Binary System 2M1207
• A "Rosetta Stone" for protoplanetary disks: The synergy of multi-wavelength observations
• Herschel survey of brown dwarf disks in Rho Ophiuchi
• The bipolar outflow and disk of the brown dwarf ISO217
• The low-mass stellar population in the young cluster Tr37: Disk evolution, accretion, and environment
• Brown dwarf disks with Herschel: Linking far-infrared and (sub)-mm fluxes
• The Herschel/PACS view of disks around low-mass stars in Chamaleon-I
• A homogeneous analysis of disks around brown dwarfs
• Millimeter Spectral Indices and Dust Trapping By Planets in Brown Dwarf Disks
• Discovery of an outflow of the very low-mass star ISO 143
• Herschel/PACS view of disks around low-mass stars and brown dwarfs in the TW Hya association
• Herschel PACS and SPIRE Observations of TWA brown dwarf discs
• The Perkins INfrared Exosatellite Survey (PINES) I. Survey Overview, Reduction Pipeline, and Early Results