4-8 October 2015
Hans Harnack Haus
Europe/Berlin timezone
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Contribution Poster

Poster session

Dust properties and gas dynamics in a magnetized prestellar core


  • Dr. Felipe ALVES

Primary authors



Prestellar cores are collapsing objects where gravity struggles against thermal pressure and magnetic fields in order to evolve and form a protostar. Observationally, this evolution may be traced by the gas kinematics and dust properties. In this work, we present recent results toward the object FeST 1-457, an evolved starless cores in the Pipe nebula. We report APEX dust polarization data and IRAM 30-m molecular line data toward this object. The polarization data reveal that the core is embedded in a very uniform magnetic field, and that the dust grains are aligned up to $\sim 10^4$ cm$^{-3}$. Our model predicts a polarization hole for higher densities, which is consistent with radiative torques grain alignment theory. We are currently inspecting the molecular line data (N$_2$H$+$ and NH$_2$D) in order to check for variations between ions and neutral species. Such a variation would imply an unambiguous evidence of gas dynamics affected by the magnetic field.