J/A+A/605/A20ivo://CDS.VizieR/J/A+A/605/A20doi:10.26093/cds/vizier.36050020CDSCazzoli G.Lattanzi V.Coriani S.Gauss J.Codella C.Asensio Ramos A.,Cernicharo J.Puzzarini C.2019-02-27T13:34:22Z2017-09-01T08:56:08ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.fratomic-physicsMagnetic 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 O_2_ has been carried out.2017A&A...605A..20Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/605/A20CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/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)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/605/A20https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/605/A20http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/605/A20https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/605/A20https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/605/A20http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/605/A20GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/A+A/605/A20/zeecompSulfur Monoxide: Zeeman spectrarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintN0Lower level rotational angular momentum, N'phys.angMomentumintJ0Lower level total angular momentum, J'phys.angMomentum;phys.atmol.levelintM0JLower level rotational level, M'_J_phys.mol.qnintN1Upper level rotational angular momentum, N"phys.angMomentumintJ1Upper level total angular momentum, J"phys.angMomentum;phys.atmol.levelintM1JUpper level rotational level, M"_J_phys.mol.qnintFreqFrequencyMHzem.freqdoublee_Freqrms uncertainty on FreqMHzstat.errordoubleIntIntensity (in arbitrary unit)spect.line.intensitydoubleCurrentCurrent (in Ampere)Aphys.atmoldoubleB? Magnetic fieldGphys.magFielddoublenullable