Poster Presentation

Inner envelope rotation of the massive YSO GL 2591

Author(s): Fernando Olguin (NTHU), Melvin Hoare (University of Leeds), Katharine Johnston (University of Leeds)

Presenter: Fernando Olguin choupay (National Tsing Hua University)

We studied the distribution of matter of the prototypical MYSO GL 2591 by modelling high-resolution multi-wavelength observations. We utilised radiative transfer models to constrain the dust density and temperature distributions from spatially resolved high-resolution dust continuum observations. These distributions were then used to study the velocity structure of the inner envelope (~5000-10000 au) by modelling methyl cyanide observations. Our results show that the density distribution of a slowly rotating collapsing core (or Ulrich solution) with bipolar outflow cavities and a disc can reproduce some of the observed continuum observations. However, the methyl cyanide observations show that the inner envelope is rotating faster than predicted by the continuum model. This can be explained by the simplicity of the Ulrich solution and may be solved by including other physical processes, e.g. magnetic fields to increase the rotation at the observed scales.