Stellar-mass-dependent disk structure in coeval planet-forming disks

László Szucs, Daniel Apai, Ilaria Pascucci, Cornelis P. Dullemond

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

Previous studies suggest that the planet-forming disks around very low mass stars/brown dwarfs may be flatter than those around more massive stars, in contrast to model predictions of larger scale heights for gas-disks around lower-mass stars. We conducted a statistically robust study to determine whether there is evidence for stellar-massdependent disk structure in planet-forming disks. We find a statistically significant difference in the Spitzer/IRAC color distributions of disks around very low mass and low mass stars all belonging to the same star-forming region, the Chamaeleon I star-forming region. We show that self-consistently calculated flared disk models cannot fit the median spectral energy distributions (SEDs) of the two groups. These SEDs can only be explained by flatter disk models, consistent with the effect of dust settling in disks. We find that, relative to the disk structure predicted for flared disks, the required reduction in disk scale height is anti-correlated with the stellar mass; i.e., disks around lower-mass stars are flatter. Our results show that the initial and boundary conditions of planet formation are stellar-mass-dependent, an important finding that must be considered in planet formation models.

Original languageEnglish (US)
Pages (from-to)1668-1673
Number of pages6
JournalAstrophysical Journal
Volume720
Issue number2
DOIs
StatePublished - Sep 10 2010
Externally publishedYes

Fingerprint

stellar mass
planets
planet
stars
scale height
spectral energy distribution
brown dwarf stars
energy
boundary condition
dust
settling
massive stars
prediction
gas
distribution
boundary conditions
color

Keywords

  • Brown dwarfs
  • Infrared: stars
  • Planets and satellites: formation
  • Protoplanetary disks
  • Stars: low-mass

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

Stellar-mass-dependent disk structure in coeval planet-forming disks. / Szucs, László; Apai, Daniel; Pascucci, Ilaria; Dullemond, Cornelis P.

In: Astrophysical Journal, Vol. 720, No. 2, 10.09.2010, p. 1668-1673.

Research output: Contribution to journalArticle

Szucs, László ; Apai, Daniel ; Pascucci, Ilaria ; Dullemond, Cornelis P. / Stellar-mass-dependent disk structure in coeval planet-forming disks. In: Astrophysical Journal. 2010 ; Vol. 720, No. 2. pp. 1668-1673.
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