J/PAZh/33/679ivo://CDS.VizieR/J/PAZh/33/679CDSArkhipova V.P.Esipov V.F.Ikonnikova N.P.Komissarova G.V.Noskova R.I.2017-06-28T06:57:51Z2008-01-22T15:43:19ZCDS support team

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

cds-question@unistra.frsupergiant-starsvisible-astronomyWide-band photometryWe present our long-term photometric and spectroscopic observations of a high-latitude B supergiant with an infrared excess - the protoplanetary nebula IRAS 18062+2410. Our UBV observations in 2000-2006 have confirmed the rapid irregular photometric variability of the star with a maximum amplitude as high as 0.4m in V that we found previously. The B-V and U-B color indices vary with amplitudes as high as 0.10m and 0.25m, respectively, and show no clear correlation with the brightness. Our V-band CCD observations on 11 nights in 2006 have revealed brightness trends during the night. The variability of IRAS 18062+2410 is similar in pattern to the light variations in other hot post-AGB objects and some of the nuclei of young planetary nebulae. We assume that pulsations and a variable stellar wind can be responsible for the variability of these stars. In addition to the rapid variability, our 12-year-long observations have revealed a systematic decline in the mean brightness of IRAS 18062+2410.2007PAZh...33..679Ahttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/PAZh/33/679CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/PAZh/25/30 : UBV photometry of IRAS 18062+2410 (Arkhipova+, 1999)J/PAZh/26/705 : UBV observations of post-AGB supergiants (Arkhipova+, 2000)J/PAZh/27/187 : UBV observations of HD 179821 (Arkhipova+, 2001)J/PAZh/27/841 : UBV and line identification of V1853 Cyg (Arkhipova+, 2001)J/PAZh/29/858 : FG Sagittae: new observations (Arkhipova+, 2003)J/PAZh/30/297 : BVRI + fluxes if HM Sge in 1986-2000 (Arkhipova+, 2004)J/PAZh/30/855 : UBV light curves of IRAS 19200+3457 (Arkhipova+, 2004)J/PAZh/32/48 : UBV photometry of HD 331319 (Arkhipova+, 2006)J/PAZh/32/662 : Photometric Variability of HD 51585 (Arkhipova+, 2006)J/PAZh/32/737 : UBV light curve and spectroscopy of StHa62 (Arkhipova+, 2006)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/PAZh/33/679https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/PAZh/33/679http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/PAZh/33/679https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/PAZh/33/679https://vizier.iucaa.in/viz-bin/votable?-source=J/PAZh/33/679http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/PAZh/33/679GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/PAZh/33/679/table1UBV observations of IRAS18062+2410 in 2000-2006recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJDJulian datedtime.epochdoubleUmagU magnitudemagphot.mag;em.opt.UfloatBmagB magnitudemagphot.mag;em.opt.BfloatVmagV magnitudemagphot.mag;em.opt.VfloatU-BU-B color indexmagphot.color;em.opt.U;em.opt.BfloatB-VB-V color indexmagphot.color;em.opt.B;em.opt.VfloatJ/PAZh/33/679/table4Equivalent widths of H{beta}, H{alpha}, and [NII] 6584 linesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJDJulian datedtime.epochintEW(Hb)? Equivalent widths of H{beta}0.1nmspect.line.eqWidth;em.line.Hbeta;spect.linefloatnullableEW(Ha)? Equivalent widths of H{alpha}0.1nmspect.line.eqWidth;em.line.Halpha;spect.linefloatnullableEW(NII)? Equivalent widths of [NII] 65840.1nmspect.line.eqWidthfloatnullable