J/A+A/538/A136ivo://CDS.VizieR/J/A+A/538/A136doi:10.26093/cds/vizier.35380136CDSAmiri N.Vlemmings W.H.T.Kemball A.J.van Langevelde H.J.2018-03-21T05:26:30Z2012-02-14T07:02:48ZCDS support team

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

cds-question@unistra.frastrophysical-masersradio-astronomymagnetic-fieldspolarimetrySiO maser emission occurs in the extended atmosphere of evolved stars and can be studied at high angular resolution. As compact, high-brightness components they can be used as important tracers of the dynamics at distances close to the central star. The masers also serve as probes of the evolutionary path from spherically symmetric AGB stars to aspherical PNe. Very long baseline interferometry (VLBI) observations of Mira variables indicate that SiO masers are significantly linearly polarized with linear polarization fractions up to 100%. However, no information is available at high angular resolution for SiO masers in higher mass loss OH/IR stars. Theory indicates a different SiO pumping mechanism in higher mass loss evolved stars. We extend the VLBI SiO maser studies to OH/IR stars. The observations enable us to understand the SiO pumping mechanisms in higher mass-loss evolved objects and to compare them with Mira variables. Additionally, polarimetric observations of SiO masers help us to understand the magnetic field strength and morphology and to distinguish between conflicting polarization theories.2012A&A...538A.136Ahttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/538/A136CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/538/A136https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/538/A136http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/538/A136https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/538/A136https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/538/A136http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/538/A136GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/538/A136/maps (*List of FITS maps)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/538/A136/maps?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/538/A136/maps?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/538/A136/maps?GETtext/xml+votable180.050000true290.402659.46570.005555555555555556Cone search capability for table J/A+A/538/A136/table1 (Results of the magnetic field determination of the SiO maser features of OH 44.8-2.3 obtained from the VLBA observations)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/538/A136/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/538/A136/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/538/A136/table1?GETtext/xml+votable180.050000true290.4026541807089.46569998611110.005555555555555556Associated datahttps://cdsarc.cds.unistra.fr/assocdata/?obs_collection=J/A+A/538/A1366/306142.8492099152324443e-23 2.8492099152324443e-23https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/538/A136?format=asciiRadiodefaultJ/A+A/538/A136/maps*List of FITS mapsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSourceSource name (OH 44.8-2.3)meta.id;meta.maincharRAJ2000Right ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.mainFileNameName of the FITS map im subdirectory mapsmeta.id;meta.fitscharTitleTitle of the map (1)meta.notecharAssocDataAssociated Data web pagemeta.bib.pagecharDownloadDownload the FITS mapmeta.ref.urlcharJ/A+A/538/A136/table1Results of the magnetic field determination of the SiO maser features of OH 44.8-2.3 obtained from the VLBA observationsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeqSequential number of featuremeta.recordintRAJ2000Right ascension (J2000.0)pos.eq.ra;meta.mainDEJ2000Declination (J2000.0)pos.eq.dec;meta.mainVelVelocity (LSR)km/sphys.veloc;pos.lsrfloatIIntensity of SiO maser feature (43GHz)Jyphot.flux.density;em.mm.30-50GHzfloatml? Linear polarization fraction%phys.polarization.linearintnullablel_BLimit flag on Bmeta.code.errorcharBMagnetic field (Gauss)0.0001Tphys.magFieldfloate_B? rms uncertainty on B (Gauss)0.0001Tstat.errorfloatnullable