J/MNRAS/467/1414ivo://CDS.VizieR/J/MNRAS/467/1414doi:10.26093/cds/vizier.74671414CDSMaoz D.Hallakoun N.2024-08-17T20:18:09Z2019-12-16T09:19:44ZCDS support team

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

cds-question@unistra.frwhite-dwarf-starsmultiple-starsradial-velocityFrom a sample of spectra of 439 white dwarfs (WDs) from the ESO-VLT Supernova-Ia Progenitor Survey (SPY), we measure the maximal changes in radial velocity ({Delta}RVmax) between epochs (generally two epochs, separated by up to 470d), and model the observed {Delta}RVmax statistics via Monte Carlo simulations, to constrain the population characteristics of double WDs (DWDs). The DWD fraction among WDs is f_bin_=0.10+/-0.02 (1{sigma}, random) +0.02 (systematic), in the separation range <~4au within which the data are sensitive to binarity. Assuming the distribution of binary separation, a, is a power law, dN/da{prop.to}a^alpha^, at the end of the last common-envelope phase and the start of solely gravitational-wave-driven binary evolution, the constraint by the data is alpha=-1.3+/-0.2(1{sigma}) +/-0.2 (systematic). If these parameters extend to small separations, the implied Galactic WD merger rate per unit stellar mass is R_merge_=(1-80)x10^-13^yr^-1^M_[sun}_^-1^ (2{sigma}), with a likelihood-weighted mean of R_merge_=(7+/-2)x10^-13^yr^-1^M_{sun}_^-1^ (1{sigma}). The Milky Way's specific Type Ia supernova (SN Ia) rate is likely R_Ia_~=1.1x10^-13^yr^-1^M_{sun}_^-1^ and therefore, in terms of rates, a possibly small fraction of all merging DWDs (e.g. those with massive-enough primary WDs) could suffice to produce most or all SNe Ia.2017MNRAS.467.1414Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/467/1414CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/467/1414https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/467/1414http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/467/1414https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/467/1414https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/467/1414http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/467/1414GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/467/1414/tablea1 (Full final WD sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/467/1414/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/467/1414/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/467/1414/tablea1?GETtext/xml+votable180.050000true0.6348333-32.19741670.0055555555555555566/7 87 96 100 108 220 269 279 333 419 651 748 4178 4319 4337 4355 4367 4369 4458 4481 4493 4566 4692 4727 8199 8230 8250 8270 8280 8361 8382 8442 8475 8718 8725 8727 12294 12348 12373 12380 12438 12541 12553 12596 12616 12714 12746-12747 12900-12901 12936 13321-13322 13327 13352 16420 16438 16451 16465 16510 16520 16584 16599 16614 16650 16730 16777 16799 16857 16974 16988 17007 17009 17013 17020 17153 17189 17280 17352 17451 17463 17534 17568 17577 17625-17626 17683 17685 17748 17772 17846 17879 17971 18068 18079 18086 18180 18246 18368 18410 18443 18474 18486 18548 18562 18657 18709 18859 18902 18911 18919 18931 19023 19122 19251 19319 19340 19434 19439 19522 19587 19629 19681 19819 19975 19979 20001 20009 20078 20152 20198 21031 21035 21143 21185 21691 22533 22591 22663 22675 22757 22846 23013 23036 23048 23105 23151 23180 23182 23187 23241 23260 23268 23286-23287 23428 23466 23468 23476 23495 23516 23544-23545 23789 23795 23804 23924 23947 24629 24659 24688 24748 24795 24809 25034 25068 25073 25079 25162 25244 25276 25326 25360 25371 25377 25400 25407 25480 25607 25634 25744 25781 25792 25822 25855-25856 25938 25943 25962 26165 26168 26172 26189 26221 26235 26258 26267 26282 26302 26305 26326 26328 26381 26420 26464 26471 26495 26668 26678 26911 26916 26932 26976 26991 27005 27030 27067 27078 27085 27209 27218 27247 27330 27350 27381 27395 27426 27432 27469 27475 27529 27554 27561 27594-27595 27631 27652 27693 27784 27859 27876 27884 27934 27974 28002 28026 28183 28243 28271 28460 29723 30044 30190 30406 30440 30621 30650 30696 30754 30767 30892 31274 31282 31290 31362 31375 31405 31451 31470 31518 31520 31528 31597 31599 31602 31612 31637 31677 31714 31722 31872 32341 32436 32458 32516 32847 33011 33015 33514 33686 33870 33955 33959 33967 34310 34347 34358 34398 34405 34421 34459 34625 34707 34815 34959 34966 34968 34975 35105 35179 35222 35258 35376 35573 35626 35670-35671 35692 35718 35721 35769 35782 35790 35839 35879 35924 35957 35978 36063 36081 36092 36120 36123 36154 36230 36238 36250 36264 36272 36342 36355 36370 36397 36403 36415 36460 36489 36521 36611 36661 36727 36858 37084 37096 38036 38324 38389 38747 39336 40070 40261 40273 40398 40402 40788 40813 41157 41570 42074 43130 43537 43891 43928 43930 43991 44016 44020 44218 44473 44516 44569 44587 44771 44796 44806 44898 44905 44971 44992 45177 45225 45437 45632 45649 45802 45962 46285 46331 46403 46405 46431 46576 46721 46743 46789 46795 46922 47009 47011 47047 47050 47459 48378 48507 48578 48621 48670 48699 48781 48863https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/467/1414?format=asciidefaultJ/MNRAS/467/1414/tablea1Full final WD sampleSimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNote[*] Note (1)meta.notecharNameWD namemeta.id;meta.maincharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainDeltatEpoch separationdtime.epochfloatDeltaRVmaxMaximum velocity difference between epochskm/sspect.dopplerVeloc;arith.diff;stat.maxfloatsigmaRoot of the summed squares of the RV errors of the two individual RV measurements forming each differencekm/sstat.stdevfloatNsigmaDeltaRVmax/sigma ratiostat.fit.omcfloatM1Derived mass for the photometric-primary WDsolMassphys.massfloatComComments (2)meta.notechar