Formation and Early Evolution of Circumstellar Disks in Turbulent Molecular Cloud Cores
arXiv:1210.0526 · doi:10.1093/mnras/sts111
Abstract
We investigate the formation and evolution of circumstellar disks in turbulent cloud cores until several 104 years after protostar formation using smoothed particle hydrodynamics (SPH) calculations. The formation and evolution process of circumstellar disk in turbulent cloud cores differs substantially from that in rigidly rotating cloud cores. In turbulent cloud cores, a filamentary structure appears before the protostar formation and the protostar forms in the filament. If the turbulence is initially sufficiently strong, the remaining filament twists around the protostar and directly becomes a rotation-supported disk. Upon formation, the disk orientation is generally misaligned with the angular momentum of its host cloud core and it dynamically varies during the main accretion phase, even though the turbulence is weak. This is because the angular momentum of the entire cloud core is mainly determined by the large scale velocity field whose wavelength is comparable to the cloud scale, whereas the angular momentum of the disk is determined by the local velocity field where the protostar forms and these two velocity fields do not correlate with each other. In the case of disk evolution in a binary or multiple stars, the disks are misaligned with each other at least during the main accretion phase, because there is no correlation between the velocity fields around the position where each protostar forms. In addition, each disk is also misaligned with the binary orbital plane. Such misalignment can explain the recent observations of misaligned disks and misaligned protostellar outflows.
arXiv comment15 pages, 14 figures, accepted for publication to MNRAS
References in corpus (30)
- Shrinking binary and planetary orbits by Kozai cycles with tidal friction
- Modelling Accretion in Protobinary Systems
- An energy-conserving formalism for adaptive gravitational force softening in SPH and N-body codes
- One-Point Probability Distribution Functions of Supersonic Turbulent Flows in Self-Gravitating Media
- Collapse of a Molecular Cloud Core to Stellar Densities: The First Three-Dimensional Calculations
- Testing the locality of transport in self-gravitating accretion discs - II. The massive disc case
- Simulating star formation in molecular cloud cores I. The influence of low levels of turbulence on fragmentation and multiplicity
- Observational Implications of Precessing Protostellar Discs and Jets
- Collapse and Fragmentation in Finite Sheets
- Formation Process of the Circumstellar Disk: Long-term Simulations in the Main Accretion Phase of Star Formation
- Turbulent Molecular Cloud Cores: Rotational Properties
- Numerical requirements for simulations of self gravitating and non-self gravitating disks
- Simulating star formation in molecular cores II. The effects of different levels of turbulence
- Emergence of Protoplanetary Disks and Successive Formation of Gaseous Planets by Gravitational Instability
- The Origin and Formation of the Circumstellar Disk
- TURBULENCE IN MOLECULAR CLOUDS
- Collapse of a molecular cloud core to stellar densities: the formation and evolution of pre-stellar discs
- Spatially resolved mid-infrared observations of the triple system T Tauri
- A Pulsed, Precessing Jet in Cepheus A
- Protostellar disks formed from rigidly rotating cores
- Protostellar discs formed from turbulent cores
- The influence of the turbulent perturbation scale on prestellar core fragmentation and disk formation
- Planet Formation In Highly Inclined Binary Systems I. Planetesimals Jump Inwards And Pile Up
- Formation of Protoplanets from Massive Planetesimals in Binary Systems
- Multi-wavelength observations of the young binary system Haro 6-10: The case of misaligned discs
- Protostellar collapse of magneto-turbulent cloud cores: shape during collapse and outflow formation
- Search for Outer Massive Bodies around Transiting Planetary Systems: Candidates of Faint Stellar Companions around HAT-P-7
- Classification of the Circumstellar Disk Evolution During the Main Accretion Phase
- SMA CO(2-1) Observations of CG30: A Protostellar Binary System with a High-Velocity Quadrupolar Molecular Outflow
- A Multiple System of Radio Sources at the Core of the L723 Multipolar Outflow
Cited by in corpus (25)
- Effects of Ohmic and ambipolar diffusion on the formation and evolution of the first cores, protostars and circumstellar discs
- Conditions for Circumstellar Disk Formation: Effects of Initial Conditions and Sink Treatment
- Bimodality of circumstellar disk evolution induced by Hall current
- Effects of radiation transfer on the structure of self-gravitating disks, their fragmentation and evolution of the fragments
- The impact of the Hall effect during cloud core collapse:implications for circumstellar disk evolution
- Massive Outflows Driven by Magnetic Effects in Star Forming Clouds with High Mass Accretion Rates
- Apparent disk-mass reduction and planetesimal formation in gravitationally unstable disks in Class 0/I YSOs
- ALMA observations of a misaligned binary protoplanetary disk system in Orion
- Does misalignment between magnetic field and angular momentum enhance or suppress circumstellar disk formation?
- Formation, orbital and thermal evolution, and survival of planetary-mass clumps in the early phase of circumstellar disk evolution
- Non-ideal magnetohydrodynamics vs turbulence I: Which is the dominant process in protostellar disc formation?
- Early evolution of disk, outflow, and magnetic field of young stellar objects: Impact of dust model
- FAUST III. Misaligned rotations of the envelope, outflow, and disks in the multiple protostellar system of VLA 16232417
- Star-disk alignment in the protoplanetary disks: SPH simulation of the collapse of turbulent molecular cloud cores
- An explicit scheme for ohmic dissipation with smoothed particle magneto-hydrodynamics
- Misaligned Twin Molecular Outflows From Class-0 Proto-stellar Binary System VLA 1623A Unveiled by ALMA
- Magnetic field and early evolution of circumstellar disks
- Kinematics of a young low-mass star forming core: Understanding the evolutionary state of the First Core Candidate L1451-mm
- Precessing Jet and Large Dust Grains in the V380 Ori NE Star-forming Region
- Formation of low mass protostars and their circumstellar disks
- Collapse and Fragmentation of Magnetic Molecular Cloud Cores with the Enzo AMR MHD Code. II. Prolate and Oblate Cores
- Gravitational Fragmentation of Extremely Metal-poor Circumstellar Discs
- Birth of magnetized low-mass protostars and circumstellar disks
- Star-forming environments in smoothed particle magnetohydrodynamics simulations I: Clump extraction and properties
- A new formation scenario of a counter-rotating circumstellar disk: spiral-arm accretion from a circumbinary disk in a triple protostar system