J/A+A/530/A28ivo://CDS.VizieR/J/A+A/530/A28doi:10.26093/cds/vizier.35300028CDSGeier S.Hirsch H.Tillich A.Maxted P.F.L.Bentley S.J.,Ostensen R.H.Heber U.Gaensicke B.T.Marsh T.R.Napiwotzki R.,Barlow B.N.O'Toole S.J.2017-06-22T14:29:01Z2011-10-10T13:11:43ZCDS support team

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

cds-question@unistra.frspectroscopic-binary-starssubdwarf-starsradial-velocityThe project Massive Unseen Companions to Hot Faint Underluminous Stars from SDSS (MUCHFUSS) aims at finding sdBs with compact companions like supermassive white dwarfs (M>1.0M_{sun}_), neutron stars or black holes. The existence of such systems is predicted by binary evolution theory and recent discoveries indicate that they are likely to exist in our Galaxy. A determination of the orbital parameters is sufficient to put a lower limit on the companion mass by calculating the binary mass function. If this lower limit exceeds the Chandrasekhar mass and no sign of a companion is visible in the spectra, the existence of a massive compact companion is proven without the need for any additional assumptions. We identified about 1100 hot subdwarf stars from the SDSS by colour selection and visual inspection of their spectra. Stars with high velocities have been reobserved and individual SDSS spectra have been analysed. In total 127 radial velocity variable subdwarfs have been discovered. Binaries with high RV shifts and binaries with moderate shifts within short timespans have the highest probability of hosting massive compact companions. Atmospheric parameters of 69 hot subdwarfs in these binary systems have been determined by means of a quantitative spectral analysis. The atmospheric parameter distribution of the selected sample does not differ from previously studied samples of hot subdwarfs. The systems are considered the best candidates to search for massive compact companions by follow-up time resolved spectroscopy.2011A&A...530A..28Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/530/A28CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/442/1023 : Radial velocity of 17 bright subdwarf B stars (Edelmann+ 2005)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/530/A28https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/530/A28http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/530/A28https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/530/A28https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/530/A28http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/530/A28GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/530/A28/targets (Priority targets for follow-up)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/530/A28/targets?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/530/A28/targets?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/530/A28/targets?GETtext/xml+votable180.050000true5.8499583-0.49811110.005555555555555556Cone search capability for table J/A+A/530/A28/tablea1 (Orbital parameters of all known hot subdwarf binaries from literature)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/530/A28/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/530/A28/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/530/A28/tablea1?GETtext/xml+votable180.050000true133.34862516.82647220.0055555555555555566/1957 2042 2302 2641 2981 3092 4078 4293 4346 4476 4497 5021 5270 5289 5474 5544 5639 5710 5823 5943 6103 6108 6129-6130 6365 6471 6613 6655 7170 7557 7830 8016 8284 8308 8388 8539 8696 8707 8770 8982 9328 9338 9664 9683 9775 9959 10024 10094 10123 10182 10308 10379 10418 10657 10872 11159 11294 11354 11680 12484 12526 12538 12818 13339 13646 13650 13767 13799 14396 14578 14669 14770 14779 16278 16625 16744 18063 18132 18372 18550 18748 18906 18997 19052 19111 19270 20279 20383 20474 21867 23510 25061 25068 25845 25921 25956 26015 26112 26215 26348 26564 26609 26780 26837 26886 26959 27001 27177 27324 27379 27478 27496 27905 27956 28390 28415 28580 28586 28646 28880 28973 30043 30168 31138 31341 31372 31393 31491 31669 32380 32476 32486 32553 32557 32672 33097 33795 34101 35150 35383 35713 35720 35798 36307 36382 38751 42955 44026 44789 44969 45027 45270 46795 47985 49122 49129https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/530/A28?format=asciiOpticaldefaultJ/A+A/530/A28/targetsPriority targets for follow-upSimbadNameSimbad column added by the CDSmeta.idcharONameOther namemeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintn_SDSSSimbad column added by the CDSmeta.idcharSDSSObject name (JHHMMSS.ss+DDMMSS.s)meta.id;meta.maincharn_Class[*d] Other analysis (1)meta.notecharClassBinary class (2)src.classcharTeff? Effective temperatureKphys.temperature.effectiveintnullablee_Teff? rms uncertainty on TeffKstat.error;phys.temperature.effectiveintnullablelogg? Surface gravitylog(cm.s**-2)phys.gravityfloatnullablee_logg? rms uncertainty on logglog(cm.s**-2)stat.errorfloatnullablel_logyLimit flag on logymeta.code.error;pos.cartesian.ycharlogy? Helium abundancephys.abund.Yfloatnullablee_logy? rms uncertainty on logystat.error;pos.cartesian.yfloatnullabled? Heliocentric distancekpcpos.distance;pos.heliocentricfloatnullableE_d? Error on d (upper value)kpcstat.error;stat.maxfloatnullablee_d? Error on d (lower value)kpcstat.errorfloatnullableDRVRadial velocity shiftkm/sspect.dopplerVelocinte_DRVrms uncertainty on DRVkm/sstat.errorintDtTime interval, {Delta}tdtime.epochdoublegmagg magnitudemagphot.mag;em.opt.BfloatNspNumber of individual spectrameta.numberintS/NS/N of the coadded spectra at ~=4100{AA}stat.snrintSloanDisplay the SDSS data for this objectmeta.ref.urlchar_RARight ascension (derived from SDSS) for Eq=J2000degpos.eq.ra;meta.main_DEDeclination (derived from SDSS) for Eq=J2000degpos.eq.dec;meta.mainJ/A+A/530/A28/tablea1Orbital parameters of all known hot subdwarf binaries from literatureSimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameObject namemeta.id;meta.maincharn_NameNotes about the nature of the subdwarf (1)meta.notecharPerPerioddtime.perioddoublegamma? System velocitykm/sphys.veloc;pos.barycenterfloatnullablee_gamma? rms uncertainty on gammakm/sstat.errorfloatnullableK? Radial velocity semi-amplitudekm/sspect.dopplerVelocfloatnullablee_K? rms uncertainty on Kkm/sstat.errorfloatnullableK2? Second component radial velocity semi-amplitudekm/sspect.dopplerVelocintnullablee_K2? rms uncertainty on K2km/sstat.errorintnullableRefReference, in refs.dat filemeta.ref;pos.frame;meta.fileint_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.mainnullable_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.mainnullableJ/A+A/530/A28/refsReferencesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRefReference numbermeta.id;meta.mainintprimaryBibCodeBibCodemeta.bib.bibcodecharAutAuthor's namemeta.bib.authorcharComCommentsmeta.notechar