Zeeman effect in sulfur monoxide: A probe to observe magnetic fields in star forming regions?

Puzzarini, Cristina

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https://hdl.handle.net/2142/96840 Copy

Description

Title

Zeeman effect in sulfur monoxide: A probe to observe magnetic fields in star forming regions?

Author(s)

Puzzarini, Cristina

Contributor(s)

• Cernicharo, Jose
• Ramos, Andrés Asensio
• Codella, Claudio
• Gauss, Jürgen
• Coriani, Sonia
• Lattanzi, Valerio
• Cazzoli, Gabriele

Issue Date

2017-06-20

Keyword(s)

Atacama Large Millimeter/submillimeter Array (ALMA)'s molecular view

Abstract

Magnetic fields play a fundamental role in star formation processes and the best method to evaluate their intensity is is to measure the Zeeman effect of atomic and molecular lines. However, a direct measurement of the Zeeman spectral pattern from interstellar molecular species is challenging due to the high sensitivity and high spectral resolution required. So far, the Zeeman effect has been detected unambiguously in star forming regions for very few non-masing species, such as OH and CN. We decided to investigate the ability of sulfur monoxide (SO), which is one of the most abundant species in star forming regions, for probing the intensity of magnetic fields via Zeeman effect. The Zeeman effect for several rotational transitions of SO in the (sub-)mm spectral regions has been investigated by using a frequency-modulated, computer-controlled spectrometer, and by applying a magnetic field parallel to the radiation source. To support the experimental determination of the $g$ factors of SO, a systematic quantum-chemical investigation of these parameters for both SO and O$_2$ has been carried out. An effective experimental-computational strategy for providing accurate $g$ factors as well as for identifying the rotational transitions showing the strongest Zeeman effect has been presented. Our investigation supports SO as a good candidate for probing magnetic fields in high-density star forming regions._x000d_

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

text

Language

eng

Permalink

http://hdl.handle.net/2142/96840

DOI

https://doi.org/10.15278/isms.2017.TF09

Copyright and License Information

Copyright 2017 Cristina Puzzarini

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