NGC 6334 VSMA spectro-polarimetric observations towards an intermediate/high-mass star forming region

Carmen Juárez in collaboration with

Josep Miquel Girart, Ya-Wen Tang, Patrich Koch and H. Baobab Liu

The Soul of High-Mass Star Formation ConferencePuerto Varas, Chile, March 16, 2015

Introduction

SMA legacy project “Filaments, star formation and magnetic fields”: 345 GHz polarization observation of a sample of 21 massive star forming regions.

The goal is to make progress in understanding the role of the magnetic field in the formation of filaments, dense cores and massive stars.

NGC 6334 V: d~1.3 kpc, Lbol ~105 LSun

Star formation activity: CO outflow, OH maser, far infrared emission, …

Spitzer 4.5 µm

~0.05 pc8”

870 micron dust continuum

Total mass ~10-22 MSun, main core mass ~3-7 MSun.

H13CO+ 4-3

0.05 pc

Hot core

34SO2, SO2, CH3OH, CH3OCH3, HC3N

!

!

M~4 MSun

Gravitationally boundCH3OCHO 31(0,31)-30(1,30)

Polarization

0.05 pc 0.05 pc

Summary

The dust emission presents three main cores, one of them being more active presenting emission from many molecules and higher velocity dispersion (hot core).

The estimated total mass is ~10-22 MSun. The hot core mass is ~3-7 MSun and agrees with a gravitationally bound system.

H13CO+ 4-3 and CH3OH 7(1,7)-6(1,6) transitions trace extended emission with “ring” like shape and clear E-W velocity gradients.

Spitzer 4.5 um shows clear E-W molecular outflow.

Polarization data shows strong detection with the magnetic field following the dust continuum structure.