Magnetic Field in The Isolated Massive Dense Clump IRAS 20126+4104

Abstract

We measured polarized dust emission at 350um towards the high-mass star forming massive dense clump IRAS 20126+4104 using the SHARC II Polarimeter, SHARP, at the Caltech Submillimeter Observatory. Most of the observed magnetic field vectors agree well with magnetic field vectors obtained from a numerical simulation for the case when the global magnetic field lines are inclined with respect to the rotation axis of the dense clump. The results of the numerical simulation show that rotation plays an important role on the evolution of the massive dense clump and its magnetic field. The direction of the cold CO 1-0 bipolar outflow is parallel to the observed magnetic field within the dense clump as well as the global magnetic field, as inferred from optical polarimetry data, indicating that the magnetic field also plays a critical role in an early stage of massive star formation. The large-scale Keplerian disk of the massive (proto)star rotates in almost opposite sense to the clump's envelope. The observed magnetic field morphology and the counter-rotating feature of the massive dense clump system provide hints to constrain the role of magnetic fields in the process of high mass star formation.

13 pages, 4 figures, accepted for publication in The Astrophysical Journal Letters

References in corpus (8)

• Theory of Star Formation
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Cited by in corpus (9)

• Exploring Magnetic Field Structure in Star-Forming Cores with Polarization of Thermal Dust Emission
• The Importance of the Magnetic Field from an SMA-CSO-Combined Sample of Star-Forming Regions
• A Hot and Massive Accretion Disk around the High-Mass Protostar IRAS 20126+4104
• Origin of Misalignments: Protostellar Jet, Outflow, Circumstellar Disc, and Magnetic Field
• Interpreting the Role of the Magnetic Field from Dust Polarization Maps
• Mid-Infrared Polarization of Herbig Ae/Be Discs
• Magnetic Field Structures in Star Forming Regions: Mid-Infrared Imaging Polarimetry of K3-50
• The magnetic field at milliarcsecond resolution around IRAS20126+4104
• The SOUL view of IRAS20126+4104. Kinematics and variability of the H${}_2$ jet from a massive protostar