J/ApJ/598/L43ivo://CDS.VizieR/J/ApJ/598/L43doi:10.26093/cds/vizier.15989043CDSWisniewski J.P.Bjorkman K.S.Magalhaes A.M.2004-04-25T17:36:01Z2004-04-25T17:34:24ZCDS support team

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

cds-question@unistra.frvariable-starspolarimetryWe present imaging polarimetry observations of the eruptive variable V838 Monocerotis and its neighboring field obtained in 2002 October. The polarization of field stars confirms the previously determined interstellar polarization along the line of sight to V838 Mon. While V838 Mon showed intrinsic polarization shortly after its second outburst on 2002 February 8, all subsequent observations only showed a quiescent interstellar polarization component. We find that V838 Mon once again showed significant intrinsic polarization in 2002 October, suggesting the presence of an asymmetrical geometry of scattering material close to the star. Furthermore, an observed 90{deg} position angle flip in the intrinsic polarization from 2002 February to October suggests that the distribution of nearby circumstellar material has experienced significant changes. We discuss the opacity changes in the evolving circumstellar cloud around V838 Mon that may explain these observations.2003ApJ...598L..43Whttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/598/L43CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/PAZh/28/764 : UBVR photometry of Nova Mon 2002 (V838 Mon) (Goranskii+, 2002)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/598/L43https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/598/L43http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/598/L43https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/598/L43https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/598/L43http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/598/L43GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/598/L43/table2 (Filter polarimetry of targets shown in Figure 1a,b)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/598/L43/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/598/L43/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/598/L43/table2?GETtext/xml+votable180.050000true106.02083-3.847220.0055555555555555566/22082https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/598/L43?format=asciiOpticaldefaultJ/ApJ/598/L43/table1Summary of Our Observations of V838 Mon and Polarimetric Observations from the LiteraturerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFilterFiltermeta.code;instr.filtercharn_Filter[*] Note on Filter (1)meta.notecharDateObservation date (in 2002)time.epochcharPolPolarisation%phys.polarizationfloate_Pol? rms uncertainty on Pol%stat.errorfloatnullablePAPosition angledegpos.posAngfloate_PA? rms uncertainty on PAdegstat.errorfloatnullablePolI? Intrinsic polarisation%phys.polarizationfloatnullablee_PolI? rms uncertainty on PolI%stat.errorfloatnullablePAI? Intrinsic position angledegpos.posAngfloatnullableRef[1-4] Reference (2)meta.refcharJ/ApJ/598/L43/table2Filter polarimetry of targets shown in Figure 1a,bFiltFiltermeta.code;instr.filtercharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainFigRefLabel in Figure 1a,bmeta.bib.figintPolPercent polarization%phys.polarizationfloate_PolError in Pol%stat.errorfloatPAPosition angledegpos.posAngfloat