Substructure Formation in a Protostellar Disk of L1527 IRS

Abstract

We analyze multi-frequency, high-resolution continuum data obtained by ALMA and JVLA to study detailed structure of the dust distribution in the infant disk of a Class~0/I source, L1527 IRS. We find three clumps aligning in the north-south direction in the $7\mathrm{mm}$ radio continuum image. The three clumps remain even after subtracting free-free contamination, which is estimated from the $1.3\mathrm{cm}$ continuum observations. The northern and southern clumps are located at a distance of $\sim 15\mathrm{au}$ from the central clump and are likely optically thick at $7\mathrm{mm}$ wavelength. The clumps have similar integrated intensities. The symmetric physical properties could be realized when a dust ring or spiral arms around the central protostar is projected to the plane of the sky. We demonstrates for the first time that such substructure may form even in the disk-forming stage, where the surrounding materials actively accrete toward a disk-protostar system.

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Cited by in corpus (5)

• Global Three-Dimensional Simulations of Outer Protoplanetary Disks with Ambipolar Diffusion
• Ring formation by coagulation of dust aggregates in early phase of disk evolution around a protostar
• ORion Alma New GEneration Survey (ORANGES) I. Dust continuum and free-free emission of OMC-2/3 filament protostars
• Magnetic Spirals in Accretion Flows Originated from Misaligned Magnetic Field
• Early Initiation of Inner Solar System Formation at Dead-Zone Inner Edge