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Title: Herschel photometry of disks around low-mass stars in the R CrA cloud

We report photometric results from a subset of a Herschel-PACS program to observe cool dust in disks around low-mass stars as a complement to our earlier program to measure far-infrared emission from brown dwarfs. In this latest study we observed five low-mass objects in the nearby R Corona Australis region and detected at least three at 70 μm. Using a Monte Carlo radiative transfer code we have investigated the disk masses and geometry based on detailed spectral energy distribution (SED) modeling, and we compare these new results to those from our earlier larger sample of brown dwarfs. In particular, our SED analysis for these five objects shows again that disk geometries of brown dwarfs or low-mass stars are generally similar to their higher mass counterparts like T Tauri disks, but the range of disk mass extends to well below the value found in T Tauri stars.
Authors:
 [1] ;  [2] ;  [3] ;  [4]
  1. Astronomy Department, University of Texas at Austin, 1 University Station C1400, Austin, TX 78712-0259 (United States)
  2. Max Planck Institute for Astronomy, Königstuhl 17, D-69117 Heidelberg (Germany)
  3. Purple Mountain Observatory and Key Laboratory for Radio Astronomy, Chinese Academy of Sciences, Nanjing 210008 (China)
  4. Institute of Theoretical Physics and Astrophysics, University of Kiel, Leibnizstr. 15, D-24098 Kiel (Germany)
Publication Date:
OSTI Identifier:
22370331
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal; Journal Volume: 795; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; COMPARATIVE EVALUATIONS; COMPUTERIZED SIMULATION; DUSTS; DWARF STARS; EMISSION; ENERGY SPECTRA; MASS; MONTE CARLO METHOD; PERTURBED ANGULAR CORRELATION; PHOTOMETRY; PROTOPLANETS; RADIANT HEAT TRANSFER; T TAURI STARS