I investigate the underlying physics by combining theory and observations!
I am an astronomer and currently FONDECYT Fellow affiliated to Universidad de Chile in Santiago, Chile.
I am interested in polarimetry as a powerful tool to probe protoplanetary disks and low-mass star-forming regions. In my free time, I am exploring the vast beauty of Chile.
On the following pages, I prepared an overview for you about myself and my research. Enjoy!
info (standard email sign) gesabertrang.com
News: In June 2018, I will start at MPIA with Mario Flock
My latest research activities
My academic career
PhD (Dr. rer. nat.) on "Observations and simulations of polarized radiation as tracer of magnetic fields in star formation"...
Diploma in physics (Dipl.-Phys.) Thesis title: "Magnetic fields in star formation"...
Grant (~125,000 USD) from the Chilean government to carry out independent research, hosted at Universidad de Chile (w Laura Perez)....
Grant (~112,000 USD) to carry out independent research within the Millenium ALMA Disk nucleus (MAD), hosted at Universidad de Chile (w Simon Casassus) and Universidad Diego Portales (w Lucas Cieza)....
What I do
Young stars are surrounded by disks of dust and gas. These circumstellar disks are the birthplaces of planets. Understanding the physical processes in these disk is vital for the understanding of planet formation. It has been predicted that magnetic fields are an important factor on a wide range of physical processes in protoplanetary disks, such as the migration of planet(esimals) and the mere evolution of disks. Yet, observational constraints are still pending. In the classical picture, (sub-)mm continuum polarisation is the tracer for magnetic fields in disks. Aspherical dust grains, whose thermal emission is intrinsically polarized, get aligned by the magnetic field due to radiative torques. In recent years, however, this picture has been challenged. New theoretical studies show that (sub-)mm continuum polarisation can also be created by scattering of the thermal dust emission or arise from aspherical grains which are aligned by the radiation field rather than the magnetic field. These three mechanisms trace fundamentally different physics in protoplanetary disks, yet, their polarisation predictions are not clearly distinguishable. I am applying 3D radiative transfer simulations of the polarized continuum and gas emission in combination with observations to disentangle the different mechanisms behind the measured polarization aiming at constraining magnetic fields in protoplanetary disks.
Magnetic fields in Bok globules are very exciting since they may be the missing mechanism in the understanding of low-mass star formation. Without this additional influence, theory overpredicts the star formation rate (SFR) by two orders of magnitude.
Get in touch with me
Get in touch
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Departamento de Astronomia
Universidad de Chile
Camino El Observatorio #1515,
Las Condes, Santiago, Chile.
info [standard email sign] gesabertrang.com