J/A+A/638/A131ivo://CDS.VizieR/J/A+A/638/A131doi:10.26093/cds/vizier.36380131CDSNapiwotzki R.Karl C.A.Lisker T.Catalan S.Drechsel H.Heber U.,Homeier D.Koester D.Leibundgut B.Marsh T.R.Moehler S.Nelemans G.,Reimers D.Renzini A.Stroeer A.Yungelson L.2022-01-14T08:18:09Z2020-06-25T06:26:40ZCDS support team

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

cds-question@unistra.frspectroscopic-binary-starswhite-dwarf-starsradial-velocityClose double degenerate binaries are one of the favoured progenitor channels for type Ia supernovae, but it is unclear how many suitable systems there are in the Galaxy. We report results of a large radial velocity survey for double degenerate (DD) binaries using the UVES spectrograph at the ESO VLT (ESO SNIa Progenitor surveY - SPY). Exposures taken at different epochs are checked for radial velocity shifts indicating close binary systems.We observed 689 targets classified as DA (displaying hydrogen-rich atmospheres), of which 46 turned out to possess a cool companion. We measured radial velocities (RV) of the remaining 643 DA white dwarfs.We managed to secure observations at two or more epochs for 625 targets, supplemented by eleven objects meeting our selection criteria from literature. The data reduction and analysis methods applied to the survey data are described in detail. The sample contains 39 double degenerate binaries, only four of which were previously known. 20 are double-lined systems, in which features from both components are visible, the other 19 are single-lined binaries. We provide absolute RVs transformed to the heliocentric system suitable for kinematic studies. Our sample is large enough to sub-divide by mass: 16 out of 44 low mass targets (<=0.45M_{sun}_) are detected as DDs, while just 23 of the remaining 567 with multiple spectra and mass >0.45M_{sun}_ are double. Although the detected fraction amongst the low mass objects (36.4+/-7.3%) is significantly higher than for the higher-mass, carbon/oxygen-core dominated part of the sample (3.9+/-0.8%), it is lower than the detection efficiency based upon companion star masses of 0.05M_{sun}_ or higher and a 100% binary fraction. This suggests either companion stars of mass below 0.05M_{sun}_ or some of the low mass white dwarfs are single.2020A&A...638A.131Nhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/638/A131CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/378/556 : UVES/VLT spectra of white dwarfs (Koester+, 2001)J/A+A/400/877 : White dwarfs 3D kinematics, SPY project (Pauli+, 2003)J/A+A/447/173 : White dwarfs 3D-kinematics, SPY project. II. (Pauli+, 2006)J/MNRAS/467/1414 : Radial velocity changes for 439 white dwarfs (Maoz+, 2017)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/638/A131https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/638/A131http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/638/A131https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/638/A131https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/638/A131http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/638/A131GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/638/A131/objects (List of spectra)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/638/A131/objects?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/638/A131/objects?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/638/A131/objects?GETtext/xml+votable180.050000true192.921-28.11313890.0055555555555555566/7 60 87 95-96 100 108 177 180 220 233 238 269 277 279 326 333 419 421 436 480 518 528 538 651 677 696 709 748 4162 4178 4319 4337 4355 4367 4369 4458 4481 4493 4566 4570 4692 4727 4825 8199 8230 8250 8270 8280 8361 8382 8442 8475 8546 8595 8718 8725 8727 8761 8965 12294 12302 12348-12349 12352 12373 12380 12438 12541 12553 12576 12596 12616 12704 12714 12746-12747 12900-12901 12936 13321-13322 13327 13352 16420 16422 16438 16451 16465 16467 16510 16520 16584 16599 16614 16650 16729-16730 16754 16759 16764 16777 16799 16857 16910 16948 16974 16988 17007 17009 17013 17020 17153 17170 17189 17208 17280 17352 17451 17463 17534 17536 17568 17577 17625-17626 17647 17683 17685 17699 17733 17748 17753 17772 17840 17846 17879 17918 17943 17971 18068 18079 18086 18133 18180 18182 18246 18368-18369 18410 18443 18474 18486 18548 18555 18560 18562 18652 18657 18709 18714 18849 18859 18875 18890 18902 18911 18919 18931 18961 18972 19023 19122 19141 19251 19265 19298 19319 19340 19408 19428 19434 19439 19467 19522 19587 19629 19681 19702 19717 19816 19819 19970 19975 19979 20001 20009 20078 20152 20198 20738 20760 21031 21035 21143 21185 21416 21691 21885 22051 22149 22533 22591 22663 22675 22749 22757 22846 22870 22943 23013 23036 23048 23090 23101 23103 23105 23151 23180 23182 23187 23198 23241 23260 23268 23286-23287 23304 23428 23457 23466 23468 23476 23490 23495 23516 23544-23545 23789 23795 23804 23924 23947 24629 24659 24688 24727 24748 24795 24805 24809 24836 24975 25034 25068 25073 25079 25162 25244 25276 25326 25360 25371 25377 25400 25407 25480 25560 25607 25613 25634 25693 25712 25744 25764 25781 25792 25805 25809 25822 25835 25855-25856 25879 25938 25943 25962 26108 26145 26165 26168 26172 26188-26189 26221 26224 26235 26258 26267 26282 26297 26299 26302 26305 26321 26326 26328 26381 26386 26420 26464 26471 26495 26668 26678 26708 26714 26791 26911 26916 26932 26976 26991 27005 27030 27067 27078 27085 27209 27218 27223 27236 27247 27286 27330 27350 27375 27381 27395 27426 27429 27432 27441 27469 27475 27490 27529 27536 27554 27561 27594-27595 27631 27652 27693 27783-27784 27839 27859 27876 27884 27934 27974 28002 28026 28110 28183 28212 28234 28243 28259 28271 28460 28982 29505 29522 29723 30044 30093 30190 30251 30406 30415 30440 30617 30621 30650 30694 30696 30754 30767 30892 31172 31274 31282 31290 31362 31375 31405 31407 31428 31451 31456 31470 31518 31520 31528 31597 31599 31602 31612 31637 31647 31677 31690 31714 31722 31726 31872 32341 32436 32458 32516 32847 33011 33015 33514 33639 33686 33870 33955 33959 33967 33984 34197 34310 34347 34358 34398 34405 34421 34459 34625 34650 34676 34707 34760 34815 34822 34959 34966 34968 34975 35093 35105 35179 35222 35246 35258 35274 35300 35376 35447 35490 35565 35573 35596 35626 35670-35671 35692 35718 35721 35769 35782 35790 35796 35806 35839 35879 35912 35924 35957 35978 36063 36081 36092 36120 36123 36154 36208 36230 36238 36250 36264 36272 36342 36355 36366 36370 36382 36397 36403 36415 36460 36469 36485 36489 36521 36567 36589 36611 36661 36670 36727 36858 37084 37096 37427 37473 37808 38036 38324 38389 38747 39336 39464 39612 39880 40070 40261 40273 40398 40402 40788 40813 40944 41017 41157 41570 42074 42700-42701 42760 43130 43537 43891 43928 43930 43991 44002 44016 44020 44218 44473 44516 44569 44587 44611 44771 44796 44806 44898 44905 44971 44992 45014 45110 45177 45225 45437 45632 45649 45782 45802 45809 45909 45921 45962 46180 46285 46331 46358 46385 46403 46405 46431 46576 46612 46653 46695 46700 46721 46743 46789 46795 46922 47009 47011 47047 47050 47459 47501 47539 47957 48378 48507 48516 48578 48621 48670 48699 48724 48728 48781 48863https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/638/A131?format=asciidefaultJ/A+A/638/A131/objectsList of spectrarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNamestar namemeta.id;meta.maincharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainspShow the spectrummeta.ref.urlcharFileNameName of spectrum file, in subdirectory sp (1)meta.id;meta.filecharJ/A+A/638/A131/tableb1RV measurements for the SPY DA white dwarfsComCommentsmeta.notecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameObject namemeta.id;meta.maincharHJDHeliocentric Julian date at mid-exposure (HJD-2400000)dtime.epochdoubleHRVHeliocentric radial velocity (1)km/sspect.dopplerVeloc;pos.heliocentricfloate_HRVrms uncertainty on HRVkm/sstat.errorfloatb_lambda? Lower limit of the wavelength range used to fit the line profiles (2)0.1nmem.wl;stat.minfloatnullableB_lambda? Upper limit of the wavelength range used to fit the line profiles (2)0.1nmem.wl;stat.maxfloatnullable<RV>? Weighted average of heliocentric radial velocity measurementskm/sspect.dopplerVeloc;pos.heliocentric;stat.meanfloatnullablee_<RV>? rms uncertainty on <RV> (3)km/sstat.errorfloatnullablel_chi2Limit flag on chi2meta.code.errorcharchi2? chi^2^ value (4)stat.fit.chi2;stat.valuedoublenullablel_logpLimit flag on logpmeta.code.errorcharlogp? Logarithmic probability that chi^2^ is as high or higher for a star with constant radial velocity (5)stat.fit.goodnessfloatnullablen_logp[dd DD] Note (6)meta.notecharJ/A+A/638/A131/tablec2Gaia DR2 IDs, effective temperatures, gravities and masses for the SPY DA white dwarfsSimbadNameSimbad column added by the CDSmeta.idcharnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameObject Namemeta.id;meta.maincharGaiaDR2? Gaia DR2 IDmeta.idnullableTeffEffective temperatureKphys.temperature.effectiveintn_Teff[)] ) for fixed valuemeta.notecharloggSurface gravitylog(cm.s**-2)phys.gravityfloatn_logg[)] ) for fixed valuemeta.notecharMass? MasssolMassphys.massfloatnullableRemReferences/remarks (1)meta.notecharJ/A+A/638/A131/telluricTelluric template for water absorption correction (data for Fig. 3)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlambdaWavelength0.1nmem.wldoubleStrengthRelative absorption strength of telluric absorption (mostly water vapour) at Paranalphys.absorptionfloat