J/A+A/547/A83ivo://CDS.VizieR/J/A+A/547/A83doi:10.26093/cds/vizier.35470083CDSGraefener G.Vink J.S.Harries T.J.Langer N.2017-12-05T05:10:40Z2013-03-26T12:17:56ZCDS support team

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

cds-question@unistra.frwolf-rayet-starspolarimetryWolf-Rayet (WR) stars with fast rotating cores are thought to be the direct progenitors of long-duration gamma-ray bursts (LGRBs). A well accepted evolutionary channel towards LGRBs is chemically-homogeneous evolution at low metallicities, which completely avoids a red supergiant (RSG), or luminous blue variable (LBV) phase. On the other hand, strong absorption features with velocities of several hundred km/s have been found in some LGRB afterglow spectra (GRB 020813 and GRB 021004), which have been attributed to dense circumstellar (CS) material that has been ejected in a previous RSG or LBV phase, and is interacting with a fast WR-type stellar wind. Here we investigate the properties of Galactic WR stars and their environment to identify similar evolutionary channels that may lead to the formation of LGRBs. We compile available information on the spectropolarimetric properties of 29 WR stars, the presence of CS ejecta for 172 WR stars, and the CS velocities in the environment of 34 WR stars in the Galaxy. We use linear line-depolarization as an indicator of rotation, nebular morphology as an indicator of stellar ejecta, and velocity patterns in UV absorption features as an indicator of increased velocities in the CS environment.2012A&A...547A..83Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/547/A83CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toIII/215 : 7th Catalog of Galactic Wolf-Rayet stars (van der Hucht, 2001)VI/110 : Final Merged Log of IUE Observations (NASA-ESA, 2000)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/547/A83https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/547/A83http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/547/A83https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/547/A83https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/547/A83http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/547/A83GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/547/A83/table5 (Ring nebulae around 172 Galactic WR stars, from the Surveys by Marston (1997ApJ...475..188M), and Miller & Chu (1993ApJS...85..137M))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/547/A83/table5?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/547/A83/table5?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/547/A83/table5?GETtext/xml+votable180.050000true10.868326164.75983360.0055555555555555565/9482 6/3029 3231 3272 3616 3723 12942 14072 14254-14255 14259 14264 14302 14309 14315 14367 14411 14430 14439 14453 14619 14622 14629-14631 14640-14641 14646 14649 14666 14670 14692-14693 14788 15387 15506 15622 20764 21550 28697 28726 28803 28806 28808-28809 28818 28898 28913 28916 28918-28919 29090 29095 29097 29162 29504 29508 29513 29524 29529 30231 30240 30245 30256 30318 32070 32085 37232 37246-37247 37333 37342-37343 37349 37364 37370 37840 37863 37870 37882 37901 37920 37922-37924 37926 37932 37936 37946 38016-38017 38019 38022 39216 39709 39755 39774 41419 41570 41577 41586 41628 41630 41655 41666-41667 41675 41677 41688 41697-41698 41745 41756 41758 41767-41768 41790 41794 42163 42168 42213 42227 42286 42295-42296 42371 42374 42377 42394 42405 42434-42436 42438 42462 42481 42562 43024 43042 43075https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/547/A83?format=asciiOpticaldefaultJ/A+A/547/A83/table4WR stars with IUE high-resolution data: circumstellar, and spectropolarimetric propertiesHDHD numbermeta.idintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintWRWR number (NNNaa) (G2)meta.id;meta.maincharm_HD[B] Multiplicity index on HDmeta.code.multipcharIUEIUE name, SWPNNNNNmeta.idcharSpTypeSpectral type from van der Hucht (2001, Cat. III/215)src.spTypecharLE[+*-] line effect according to Harries et al. (1998MNRAS.296.1072H) (1)meta.codecharRNDetections of ring nebulae (G1)meta.codecharNFDetections of circumstellar displacements according to Nichols & Fesen (1994A&A...291..283N) (2)meta.codecharl_FWHM1Limit flag on FWHM1meta.code.errorcharFWHM1? CIV 1548 circumstellar broadening velocitieskm/sphys.velocfloatnullableFWHM2? CIV 1550 circumstellar broadening velocitieskm/sphys.velocfloatnullableClassTentative classification of the morphology of the observed CIV absorption features (cf. Fig. 1)meta.code.classcharJ/A+A/547/A83/table5Ring nebulae around 172 Galactic WR stars, from the Surveys by Marston (1997ApJ...475..188M), and Miller & Chu (1993ApJS...85..137M)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSSimbad column added by the CDSmeta.ref.urlcharWRWR name (G2)meta.id;meta.maincharprimaryMa97Nebular classifications by Marston (1997ApJ...475..188M) (G1)src.classcharMC93Nebular classifications by Miller & Chu (1993ApJS...85..137M) (G1)src.classcharCh91Nebular classifications by Chu (1991, IAU Symp., 143, 349) (G1)src.classcharSB10Nebular classifications by Stock & Barlow (2010MNRAS.409.1429S) (G1)src.classcharSimbadSimbad column added by the CDSmeta.refchar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.main