J/A+A/587/A115ivo://CDS.VizieR/J/A+A/587/A115doi:10.26093/cds/vizier.35870115CDSMartayan C.Lobel A.Baade D.Mehner A.Rivinius T.Boffin H.M.J.,Girard J.Mawet D.Montagnier G.Blomme R.Kervella P.Sana H.,Stefl S.Zorec J.Lacour S.Le Bouquin J.-B.Martins F.Merand A.,Patru F.Selman F.Fremat Y.2017-12-06T07:37:51Z2016-03-02T11:41:25ZCDS support team

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

cds-question@unistra.frvariable-starsLuminous blue variables (LBVs) are rare massive stars with very high luminosity. They are characterized by strong photometric and spectroscopic variability related to transient eruptions. The mechanisms at the origin of these eruptions is not well known. In addition, their formation is still problematic and the presence of a companion could help to explain how they form. This article presents a study of seven LBVs (about 20% of the known Galactic population), some Wolf-Rayet stars, and massive binaries. We probe the environments that surround these massive stars with near-, mid-, and far-infrared images, investigating potential nebula/shells and the companion stars. To investigate large spatial scales, we used seeing-limited and near diffraction-limited adaptive optics images to obtain a differential diagnostic on the presence of circumstellar matter and to determine their extent. From those images, we also looked for the presence of binary companions on a wide orbit. Once a companion was detected, its gravitational binding to the central star was tested. Tests include the chance projection probability, the proper motion estimates with multi-epoch observations, flux ratio, and star separations.2016A&A...587A.115Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/587/A115CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/587/A115https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/587/A115http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/587/A115https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/587/A115https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/587/A115http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/587/A115GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/587/A115/tableb1 (Catalogue of objects surrounding HD168625 in a radius of 18" as shown in Fig. 1)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/587/A115/tableb1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/587/A115/tableb1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/587/A115/tableb1?GETtext/xml+votable180.050000true275.3312083-16.37393330.005555555555555556Cone search capability for table J/A+A/587/A115/tableb2 (Catalogue of objects surrounding the Pistol Star within a box of 14"x14" as defined in Fig. A1-A8)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/587/A115/tableb2?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/587/A115/tableb2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/587/A115/tableb2?GETtext/xml+votable180.050000true266.5629167-28.83432780.005555555555555556Cone search capability for table J/A+A/587/A115/list (List of fits images)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/587/A115/list?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/587/A115/list?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/587/A115/list?GETtext/xml+votable180.050000true266.56296-28.834450.0055555555555555566/28830 28890 29090 29116 29558 306944.925240337479573e-20 1.0188844282367877e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/587/A115?format=asciidefaultJ/A+A/587/A115/tableb1Catalogue of objects surrounding HD168625 in a radius of 18" as shown in Fig. 1StarStar namemeta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainl_LpmagLimit flag on Lpmagmeta.code.errorcharLpmagNACO Lp (3.80um) magnitude (1)magphot.mag;em.IR.3-4umfloate_Lpmag? rms uncertainty on Lpmagmagstat.error;phot.mag;em.IR.3-4umfloatnullableJ/A+A/587/A115/tableb2Catalogue of objects surrounding the Pistol Star within a box of 14"x14" as defined in Fig. A1-A8recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarStar name (1)meta.id;meta.maincharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainKmag? NACO K magnitude (2)magphot.mag;em.IR.Kfloatnullableu_KmagUncertainty flag on Kmag (1)meta.code.errorchare_Kmag? rms uncertainty on Kmagmagstat.error;phot.mag;em.IR.KfloatnullableJ/A+A/587/A115/listList of fits imagesNyNumber of pixels along Y-axismeta.numberintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameStar namemeta.id;meta.maincharClassClassification (from table1) (1)src.classcharn_Class[c] c: Classification form Raw et al. (2012A&A...542A..95R)meta.notecharRAJ2000Right Ascension of center (J2000)degpos.eq.ra;meta.mainDEJ2000Declination of center (J2000)degpos.eq.dec;meta.mainscaleScale of the imagearcsec/pixinstr.scalefloatNxNumber of pixels along X-axismeta.numberintObs.DateObservation datetime.epoch;obscharsizeSize of FITS fileKibytephys.size;meta.fitsintFileNameName of FITS file, in subdirectory fitsmeta.id;meta.fitscharTitleTitle of the FITS filemeta.title;meta.fitscharSimbadSimbad column added by the CDSmeta.ref.urlchar