DETECTION OF A MAGNETIZED DISK AROUND A VERY YOUNG PROTOSTAR

Journal Article · Wed Jan 01 04:00:00 EST 2014 · Astrophysical Journal Letters

DOI:https://doi.org/10.1088/2041-8205/780/1/L6· OSTI ID:22364073

Rao, Ramprasad ^[1]; Girart, Josep M. ^[2]; Lai, Shih-Ping ^[3]

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1. Institute of Astronomy and Astrophysics, Academia Sinica, 645 N. Aohoku Place, Hilo, HI 96720 (United States)
2. Institut de Ciències de l'Espai, (CSIC-IEEC), Campus UAB, Facultat de Ciències, C5p 2, E-08193 Bellaterra Catalonia (Spain)
3. Institute of Astronomy and Department of Physics, National Tsing Hua University, Hsinchu 30013, Taiwan (China)

We present subarcsecond resolution polarimetric observations of the 878 μm thermal dust continuum emission obtained with the Submillimeter Array toward the IRAS 16293–2422 protostellar binary system. We report the detection of linearly polarized dust emission arising from the circumstellar disk associated with the IRAS 16293–2422 B protostar. The fractional polarization of ≅ 1.4% is only slightly lower than that expected from theoretical calculations in such disks. The magnetic field structure on the plane of the sky derived from the dust polarization suggests a complex magnetic field geometry in the disk, possibly associated with a rotating disk that is wrapping the field lines as expected from the simulations. The polarization around IRAS 16293–2422 A at subarcsecond angular resolution is only marginally detected.

• OSTI ID: 22364073
• Journal Information: Astrophysical Journal Letters, Journal Name: Astrophysical Journal Letters Journal Issue: 1 Vol. 780; ISSN 2041-8205
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
ACCRETION DISKS
ASTROPHYSICS
COMPUTERIZED SIMULATION
COSMIC DUST
DETECTION
EMISSION
MAGNETIC FIELDS
POLARIZATION
PROTOSTARS
RESOLUTION
SKY
STARS