Interferometric mapping of magnetic fields: The massive star-forming region G34.4+0.23 MM

被引：25

作者：

Cortes, P. C. ^{[1
]}

Crutcher, R. M. ^{[2
]}

Shepherd, D. S. ^{[3
]}

Bronfman, L. ^{[1
]}

机构：

[1] Univ Chile, Dept Astron, Santiago, Chile

[2] Univ Illinois, Dept Astron, Urbana, IL 61801 USA

[3] Natl Radio Astron Observ, Socorro, NM 87801 USA

来源：

ASTROPHYSICAL JOURNAL | 2008年 / 676卷 / 01期

关键词：

ISM : magnetic fields; stars : formation;

D O I：

10.1086/524355

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report millimeter interferometric observations of polarized continuum and line emission from the massive star-forming region G34.4. Polarized thermal dust emission at 3 mm wavelength and CO J = 1 -> 0 line emission were observed using the Berkeley-Illinois-Maryland Association (BIMA) array. Our results show a remarkably uniform polarization pattern in both dust and in CO J = 1 -> 0 emission. In addition, the line emission presents a consistent uniform polarization pattern over most of the velocity channel maps. These uniform polarization patterns are aligned with the north-south main axis of the filament between the main millimeter source (MM) and the ultra-compact H II region, which are the central sources in G34.4, suggesting a magnetic field orthogonal to this axis. This morphology is consistent with a magnetically supported disk seen roughly edge-on.

引用

页码：464 / 471

页数：8

共 29 条

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Briggs DS, 1999, ASTR SOC P, V180, P127

[2]

Bronfman L, 1996, ASTRON ASTROPHYS SUP, V115, P81

[3] Interferometric mapping of magnetic fields: G30.79 FIR 10 [J].