SIMBAD references

2018ApJ...867...79C - Astrophys. J., 867, 79-79 (2018/November-1)

Magnetic field uniformity across the GF 9-2 YSO, L1082C dense core, and GF 9 filamentary dark cloud.


Abstract (from CDS):

The orientation of the magnetic field (B field) in the filamentary dark cloud GF 9 was traced from the periphery of the cloud into the L1082C dense core that contains the low-mass, low-luminosity Class 0 young stellar object (YSO) GF 9-2 (IRAS 20503+6006). This was done using SOFIA HAWC+ dust thermal emission polarimetry (TEP) at 216 µm in combination with Mimir near-infrared background starlight polarimetry (BSP) conducted in the H band (1.6 µm) and K band (2.2 µm). These observations were augmented with published I-band (0.77 µm) BSP and Planck 850 µm TEP to probe B-field orientations with offset from the YSO in a range spanning 6000 au to 3 pc. No strong B-field orientation change with offset was found, indicating remarkable uniformity of the B-field from the cloud edge to the YSO environs. This finding disagrees with weak-field models of cloud core and YSO formation. The continuity of inferred B-field orientations for both TEP and BSP probes is strong evidence that both are sampling a common B field that uniformly threads the cloud, core, and YSO region. Bayesian analysis of Gaia DR2 stars matched to the Mimir BSP stars finds a distance to GF 9 of 270 ± 10 pc. No strong wavelength dependence of B-field orientation angle was found, contrary to previous claims.

Abstract Copyright: © 2018. The American Astronomical Society. All rights reserved.

Journal keyword(s): instrumentation: polarimeters - magnetic fields - polarization - stars: formation - stars: protostars - techniques: polarimetric

VizieR on-line data: <Available at CDS (J/ApJ/867/79): table1.dat>

Errata: erratum vol. 869, art. 86 (2018)

Status at CDS : Examining the need for a new acronym. // All or part of tables of objects will not be ingested in SIMBAD.

Simbad objects: 7

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