Access to Astronomical Catalogues

← Click to display the menu
J/A+A/605/A20       Zeeman effect in sulfur monoxide (SO)       (Cazzoli+, 2017)

Zeeman effect in sulfur monoxide. A tool to probe magnetic fields in star forming regions. Cazzoli G., Lattanzi V., Coriani S., Gauss J., Codella C., Asensio Ramos A., Cernicharo J., Puzzarini C. <Astron. Astrophys. 605, A20 (2017)> =2017A&A...605A..20C (SIMBAD/NED BibCode)
ADC_Keywords: Atomic physics Keywords: ISM: molecules - molecular data - methods: data analysis - methods: laboratory: molecular - magnetic fields Abstract: Magnetic fields play a fundamental role in star formation processes and the best method to evaluate their intensity 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 suitability of sulfur monoxide (SO), which is one of the most abundant species in star forming regions, for probing the intensity of magnetic fields via the Zeeman effect. We investigated the Zeeman effect for several rotational transitions of SO in the (sub-)mm spectral regions by using a frequency-modulated, computer-controlled spectrometer, and by applying a magnetic field parallel to the radiation propagation (i.e., perpendicular to the oscillating magnetic field of the radiation). To support the experimental determination of the g factors of SO, a systematic quantum-chemical investigation of these parameters for both SO and O2 has been carried out. Description: The complete list of measured Zeeman components of sulfur monoxide (SO). File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file zeecomp.dat 71 360 Sulfur Monoxide: Zeeman spectra
See also: J/A+A/531/A103 : Collisional excitation of sulfur dioxide (Cernicharo+, 2011) J/ApJ/799/115 : Absorption spectrum of SO up to 2.5THz (Martin-Drumel+ 2015) J/MNRAS/459/3890 : ExoMol line lists for SO2 (Underwood+, 2016) Byte-by-byte Description of file: zeecomp.dat
Bytes Format Units Label Explanations
1- 2 I2 --- N0 Lower level rotational angular momentum, N' 5- 6 I2 --- J0 Lower level total angular momentum, J' 8- 10 I3 --- M0J Lower level rotational level, M'J 12- 13 I2 --- N1 Upper level rotational angular momentum, N" 16- 17 I2 --- J1 Upper level total angular momentum, J" 20- 21 I2 --- M1J Upper level rotational level, M"J 23- 34 F12.5 MHz Freq Frequency 36- 42 F7.5 MHz e_Freq rms uncertainty on Freq 44- 52 F9.5 --- Int Intensity (in arbitrary unit) 54- 61 F8.5 A Current Current (in Ampere) 63- 71 F9.5 G B ? Magnetic field
Acknowledgements: Cristina Puzzarini, cristina.puzzarini(at)unibo.it
(End) Patricia Vannier [CDS] 15-May-2017
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

catalogue service

© UDS/CNRS

Contact