The Effect of Misalignment between Rotation Axis and Magnetic Field on Circumstellar Disk

Abstract

The formation of circumstellar disks is investigated using three-dimensional resistive magnetohydrodynamic simulations, in which the initial prestellar cloud has a misaligned rotation axis with respect to the magnetic field. We examine the effects of (i) the initial angle difference between the global magnetic field and the cloud rotation axis (${\theta }_0$) and (ii) the ratio of the thermal to gravitational energy (${\alpha }_0$). We study $16$ models in total and calculate the cloud evolution until $\sim 5000$ yr after protostar formation. Our simulation results indicate that an initial non-zero ${\theta }_0$ ($>0$) promotes the disk formation but tends to suppress the outflow driving, for models that are moderately gravitationally unstable, ${\alpha }_0\lesssim 1$. In these models, a large-sized rotationally-supported disk forms and a weak outflow appears, in contrast to a smaller disk and strong outflow in the aligned case (${\theta }_0=0$). Furthermore, we find that when the initial cloud is highly unstable with small ${\alpha }_0$, the initial angle difference ${\theta }_0$ does not significantly affect the disk formation and outflow driving.

27 pages, 21 figures, 2 tables, Accepted for publication in ApJ

References in corpus (22)

• Spiral Density Waves in a Young Protoplanetary Disk
• Magnetic Braking and Protostellar Disk Formation: The Ideal MHD Limit
• Formation of a Keplerian disk in the infalling envelope around L1527 IRS: transformation from infalling motions to Kepler motions
• Radiation Magnetohydrodynamic Simulations of Protostellar Collapse: Non-Ideal Magnetohydrodynamic Effects and Early Formation of Circumstellar Disks
• Resolved images of a protostellar outflow launched by an extended disk wind
• Signs of Early-Stage Disk Growth Revealed with ALMA
• Magnetic Fields and Rotations of Protostars
• Effects of Ohmic and ambipolar diffusion on the formation and evolution of the first cores, protostars and circumstellar discs
• Magnetically self-regulated formation of early protoplanetary discs
• Grand Design Spiral Arms in A Young Forming Circumstellar Disk
• Evolution of Rotating Molecular Cloud Core with Oblique Magnetic Field
• The role of magnetic fields in the formation of protostellar discs
• Observations of Infalling and Rotational Motions on a 1,000-AU Scale around 17 Class 0 and 0/I Protostars: Hints of Disk Growth and Magnetic Braking?
• The impact of the Hall effect during cloud core collapse:implications for circumstellar disk evolution
• Molecular outflow launched beyond the disk edge
• The First Two Thousand Years of Star Formation
• Effect of Angular Momentum Alignment and Strong Magnetic Fields on the Formation of Protostellar Disks
• Misalignment of Magnetic Fields, Outflows and Discs in Star-forming Clouds
• Origin of Misalignments: Protostellar Jet, Outflow, Circumstellar Disc, and Magnetic Field
• Massive Outflows Driven by Magnetic Effects II: Comparison with Observations
• Dependence of Hall Coefficient on Grain Size and Cosmic Ray Rate and Implication for Circumstellar Disk Formation
• ALMA Observations of SMM11 Reveal an Extremely Young Protostar in Serpens Main Cluster

Cited by in corpus (9)

• Formation and evolution of protostellar accretion discs. I. Angular-momentum budget, gravitational self-regulation, and numerical convergence
• FAUST II. Discovery of a Secondary Outflow in IRAS 15398-3359: Variability in Outflow Direction during the Earliest Stage of Star Formation?
• The JCMT BISTRO survey: alignment between outflows and magnetic fields in dense cores/clumps
• Crescent-Shaped Molecular Outflow from the Intermediate-mass Protostar DK Cha Revealed by ALMA
• Impact of Magnetic Braking on High-mass Close Binary Formation
• Centrifugal Barrier and Super-Keplerian Rotation in Protostellar Disk Formation
• Can High-velocity Protostellar Jets Help to Drive Low-velocity Outflow?
• Effects of magnetic field orientations in dense cores on gas kinematics in protostellar envelopes
• Non-ideal MHD and protostellar feedback effects on disc formation and evolution in numerical simulations of star cluster formation