J/ApJ/898/84ivo://CDS.VizieR/J/ApJ/898/84doi:10.26093/cds/vizier.18980084CDSKilic M.Bergeron P.Kosakowski A.Brown W.R.Agueros M.A.Blouin S.2022-09-21T08:38:09Z2021-10-25T08:13:39ZCDS support team

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

cds-question@unistra.frwhite-dwarf-starsvisible-astronomyspectroscopystellar-masseschemical-abundanceseffective-temperatureproper-motionstrigonometric-parallaxWe present follow-up spectroscopy of 711 white dwarfs within 100pc, and we present a detailed model atmosphere analysis of the 100pc white dwarf sample in the Sloan Digital Sky Survey footprint. Our spectroscopic follow-up is complete for 83% of the white dwarfs hotter than 6000K, where the atmospheric composition can be constrained reliably. We identify 1508 DA white dwarfs with pure hydrogen atmospheres. The DA mass distribution has an extremely narrow peak at 0.59M_{sun}_ and reveals a shoulder from relatively massive white dwarfs with M=0.7-0.9M_{sun}_. Comparing this distribution with binary population synthesis models, we find that the contribution from single stars that form through mergers cannot explain the overabundance of massive white dwarfs. In addition, the mass distribution of cool DAs shows a near absence of M>1M_{sun}_ white dwarfs. The pile-up of 0.7-0.9M_{sun}_ and the disappearance of M>1M_{sun}_ white dwarfs is consistent with the effects of core crystallization. Even though the evolutionary models predict the location of the pile-up correctly, the delay from the latent heat of crystallization by itself is insufficient to create a significant pile-up, and additional cooling delays from related effects like phase separation are necessary. We also discuss the population of infrared-faint (ultracool) white dwarfs and demonstrate for the first time the existence of a well-defined sequence in color and magnitude. Curiously, this sequence is connected to a region in the color-magnitude diagrams where the number of white dwarfs with a helium- dominated atmosphere is low. This suggests that the infrared-faint white dwarfs likely have mixed H/He atmospheres.2020ApJ...898...84Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/898/84CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/207 : Palomar-Green catalog UV-excess stellar objects (Green+ 1986)III/235 : Spectroscopically Identified White Dwarfs (McCook+, 2008)II/319 : UKIDSS-DR9 LAS, GCS and DXS Surveys (Lawrence+ 2012)V/147 : The SDSS Photometric Catalogue, Release 12 (Alam+, 2015)I/345 : Gaia DR2 (Gaia Collaboration, 2018)J/ApJS/133/413 : BVRIJHK photometry of cool white dwarfs (Bergeron+, 2001)J/ApJS/156/47 : DA white dwarfs from the Palomar Green Survey (Liebert+, 2005)J/ApJS/167/40 : SDSS4 confirmed white dwarfs catalog (Eisenstein+, 2006)J/AJ/132/1221 : VJHK and SDSS photometry of DA white dwarfs (Holberg+, 2006)J/AJ/131/582 : Cool white dwarfs in the SDSS (Kilic+, 2006)J/ApJS/190/77 : Detailed analysis of cool WDs in the SDSS (Kilic+, 2010)J/ApJ/743/138 : Spectroscopic survey of bright white dwarfs (Gianninas+, 2011)J/ApJ/750/99 : The Pan-STARRS1 photometric system (Tonry+, 2012)J/ApJS/204/5 : SDSS DR7 white dwarf catalog (Kleinman+, 2013)J/MNRAS/449/3966 : Ultracool white dwarfs (Gianninas+, 2015)J/ApJS/219/19 : Census of nearby white dwarfs from SUPERBLINK (Limoges+, 2015)J/MNRAS/462/2295 : 25 parsec local white dwarf population (Holberg+, 2016)J/A+A/595/A35 : Low-mass helium WDs evolutionary models (Istrate+, 2016)J/A+A/616/A10 : 46 open clusters GaiaDR2 HR diag (Gaia Collaboration, 2018)J/ApJ/878/63 : Cool WD atm. models. IV. Spectral evolution (Blouin+, 2019)J/ApJ/886/100 : High-mass white dwarfs in Gaia DR2 (Cheng+, 2019)J/ApJ/885/74 : 1340 Helium rich white dwarfs in the Gaia era (Coutu+, 2019)J/ApJ/882/106 : DB white dwarfs with SDSS & Gaia data (Genest-Beaulieu+, 2019)J/MNRAS/482/4570 : Gaia DR2 white dwarf candidates (Gentile Fusillo+, 2019)J/A+A/628/A102 : Carbon-rich (DQ) white dwarfs in SDSS (Koester+, 2019)J/ApJ/889/49 : The ELM Survey. VIII. Final double WD binaries (Brown+, 2020)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/898/84https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/898/84http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/898/84https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/898/84https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/898/84http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/898/84GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/898/84/table1 (The 100pc white dwarf in the SDSS footprint)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/898/84/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/898/84/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/898/84/table1?GETtext/xml+votable180.050000true0.0471-4.054140.0055555555555555565/1631 1657 3109 4539 5054 5214 6900 6/9-11 13-14 33 39 45 49-50 87 105 114 121 125 137 196 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23139 23182-23183 23198 23201 23210 23212 23214 23225 23256 23268 23271 23277 23279-23280 23288 23292 23295 23298 23343 23353 23357 23359 23395 23401-23402 23404 23407 23414 23428 23441 23470-23471 23486-23488 23531 23545-23546 23554 23561 23579-23580 23585 23600 23625 23637 23644 23680 23688 23833 24054 24060 24102 24108 24116 24143 24158 24164 24233-24234 24237-24238 24248 24290-24291 24299-24300 24310 24316 24335 24342 24447 24476-24477 24483 24518 24522 24528 24530 24537 24877 24882-24883 24895 25024 25034 25036 25060 25073 25075 25217 25240 25244 25268 25289 25291 25312 25329 25331 25334 25341 25428 25529 25567 25585 25590 25592 25594 25692 25694 25843 25850-25852 25903 25909 25916 25924 25937-25940 25942 25944 25947 25951 25955 25959 25962 25964 25967 25969 25980 25984 25989 25995 26004-26005 26008 26010 26018-26019 26025 26030-26031 26033 26053 26059 26061 26070 26072-26073 26076 26089 26095 26101 26107-26108 26111 26121 26165 26168-26169 26172-26173 26178 26181-26182 26184 26190 26193 26200 26207 26209 26221 26224 26226 26231 26243-26244 26250-26251 26258 26260 26266-26267 26269 26276 26282 26285 26302 26321-26322 26326 26336 26344 26346 26348-26349 26351-26353 26358-26359 26367 26369 26375 26380-26381 26391 26396 26400-26401 26415 26422 26428 26439 26444 26447 26449 26454 26461 26464 26468-26469 26471 26481 26483 26489-26490 26501 26513-26514 26516 26519 26523 26526 26528-26529 26531 26538 26550 26558 26566-26567 26575 26583 26587 26592 26600-26601 26603 26609-26610 26619 26846 26870 26896 26900 26929 26936 26938 26941 26943 26951 26957 26960 26965 26976 26993 27007 27019 27030 27033 27040 27045 27047 27061-27062 27066 27069 27072 27074 27078 27086 27093 27103 27107-27108 27112 27120 27123 27204 27209 27218 27220 27223-27224 27228 27230-27231 27242-27243 27247-27248 27255 27274 27290-27291 27299 27309 27312-27314 27316 27321 27330-27331 27335-27336 27342 27344 27347 27356 27358 27366 27369 27371 27381 27385-27386 27395 27397-27398 27405-27406 27416 27426 27429 27432 27436 27441 27447-27448 27450 27452 27455 27460 27469 27475 27500 27503-27504 27510 27529 27534 27538-27539 27544-27546 27548 27560 27563 27570 27579 27587 27593 27595 27606 27617 27621 27631-27633 27641-27642 27648 27656 27658 27666 27668 27670 27674-27675 27681 27685 27689 27700 27707 27709-27711 27722 27726 27729-27730 27733 27741 27744 27746 27748 27750 27752-27753 27764 27767 27770 27781 27784 27788 27792 27799 27803 27808 27811 27815 27817-27818 27836-27837 27839 27842 27852-27853 27860 27865-27866 27872 27886 27902 27907 27910 27918 27923 27927 27929-27930 27935 27942 27948 27954 27956 27966-27968 27970 27974-27975 27980 27982 28001-28003 28005-28006 28012 28014 28021 28024 28026 28028-28029 28033 28045 28049 28057 28059-28060 28063 28074-28075 28079 28081 28084 28091 28096 28101 28113 28115-28116 28129 28137 28140 28142 28146 28148 28152-28153 28171 28188 28190 28196 28205 28221 28225-28226 28236-28237 28241 28243 28252 28257 28260 28271-28272 28277 28285 28291 28293 28299 28305 28308 28313 28333 28337 28344 28349 28354 28358 28365 28372 28388 28390-28391 28394 28408 28429 28432 28434 28440 28482 28493 28496 28501 28504 28507 28510-28511 28519-28520 28525 28532-28533 28535-28536 28540 28545 28559 28561 28569 28574 28578 28592 28606 28617 28621 28636 28644 28647 28651-28652 28664 28666 28671 29097 29423 29427 29776 29808 29810 29903 29926 30031-30032 30036 30041 30043-30045 30051 30053 30058 30070 30078 30093 30100 30106 30109 30124 30129 30172 30199 30201 30388 30392 30547 30549 30706 30758-30759 30778 30799 30818 30821 30827 30833 30839 30846 30917 30926-30927 30939 30960 30965-30967 31020 31023 31037 31039 31063 31066 31068 31070 31081 31098 31100 31120 31128 31139 31150 31163 31166 31172 31184-31185 31223 31283 31285 31287 31289-31291 31295 31299 31303 31308-31309 31311 31317 31323 31330 31334 31346 31353 31357 31369-31370 31375-31376 31381 31384 31386 31388 31411 31418 31424 31426 31432-31434 31441-31442 31446-31447 31450-31451 31455 31460 31470 31474 31482 31488 31507 31526 31530 31533 31538-31539 31546 31548 31573 31580 31594 31596-31598 31607-31608 31612 31615-31617 31622 31626 31630 31632 31640 31645 31647-31649 31652 31656 31660-31661 31677 31682 31687 31690 31692 31698 31700 31702 31704 31708 31710 31713 31716 31718-31719 31722 31726 31732 31735 31739 31741 31745 31759 31762 31780 31787 31789 31879 31882 31884 31892 31905 31907 31913 31915 31938 31953 32098 32105 32108 32118 32156 32188 32264 32268 32289 32293 32327 32376 32379 32387 32389 32394 32399 32403 32410 32412 32418 32429 32436-32437 32439 32447 32450-32451 32457-32458 32462 32469-32470 32473 32475 32477 32484 32488 32492-32493 32497 32500 32504-32505 32517 32526 32528 32530-32531 32552 32559-32560 32649 32672 32674 32676-32678 32684-32685 32698 32702 32761 32763-32764 32766 36328 36330 36461-36463 36509 36530 36536-36537 36542 36549 36560 36578 36588 36591 36600 36717 36727 36733 36764 36798 36805 36807 36809 36863 40951 40955-40956 40959 44367 44396 44406 44410-44411 44487 44494 44516 44521 44597 44618 44654 44867 44898 44900 44902 44904-44905 44988 45001 45039 45049 48743 48754 48756 48852 48855 48881-48883 48888 48891 48928-48930 48937 48951 48966 48971 48996 49008-49009 49016 49077 49098 49120 49122 49124 49126 49128 49139-49140 49142 491472.1130535859712245e-19 4.851276835901009e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/898/84?format=asciiOpticaldefaultJ/ApJ/898/84/table1The 100pc white dwarf in the SDSS footprintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDObject identifier (truncated name: JHHMM+DDMM)meta.idcharGaiaGaia DR2 source identifiermeta.id;meta.mainprimaryPDisplay the physical parameters for this white dwarfmeta.ref.urlcharRA_ICRSGaia DR2 barycentric right ascension (ICRS) at Ep=2015.5degpos.eq.ra;meta.mainDE_ICRSGaia DR2 barycentric declination (ICRS) at Ep=2015.5degpos.eq.dec;meta.mainplx[10/232] Gaia DR2 parallaxmaspos.parallax.trigfloate_plx[0.02/1.3] Uncertainty in plxmasstat.error;pos.parallaxfloatpmRA[-1093/1232] Gaia DR2 Proper motion along RAmas/yrpos.pm;pos.eq.rafloate_pmRA[0/2.4] Uncertainty in pmRAmas/yrstat.error;pos.pm;pos.eq.rafloatpmDE[-2712/747] Gaia DR2 Proper motion along DEmas/yrpos.pm;pos.eq.decfloate_pmDE[0.0/3.1] Uncertainty in pmDEmas/yrstat.error;pos.pm;pos.eq.decfloatGmag[12/20.6] Gaia DR2 G band apparent magnitudemagphot.mag;em.optfloatBPmag[11.9/21.2] Gaia DR2 blue passband apparent magnitudemagphot.mag;em.opt.BfloatRPmag[11.9/20.3] Gaia DR2 red passband apparent magnitudemagphot.mag;em.opt.RfloatSloanDisplay the online SDSS-DR14 data for the nearest objectmeta.ref.urlcharSimbadSimbad column added by the CDSmeta.ref.urlchar_RA.icrsRight ascension (ICRS) at Epoch=J2000, proper motions taken into accountdegpos.eq.ranullableindexed_DE.icrsDeclination (ICRS) at Epoch=J2000, proper motions taken into accountdegpos.eq.decnullableindexedJ/ApJ/898/84/paramPhysical parameters of the white dwarfs (Tables 3-7)TypeWhite dwarf typesrc.spTypecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDObject identifier (truncated name: JHHMM+DDMM)meta.idcharGaiaGaia DR2 source identifiermeta.id;meta.mainTeff[4668/53603] Effective temperatureKphys.temperature.effectiveinte_Teff[6/7768]? Uncertainty in TeffKstat.error;phys.temperature.effectiveintnullablelog(g)[6.7/9.5] Log surface gravitylog(cm.s**-2)phys.abund;arith.ratiofloate_log(g)[0.002/0.1] Uncertainty in log (g)log(cm.s**-2)stat.errorfloatMass[0.1/1.4] MasssolMassphys.massfloate_MassUncertainty in MasssolMassstat.error;phys.massfloatlogH/He[-5/-1]? Log H/He abundance ratiophys.abund;arith.ratiofloatnullablelogC/He[-7/-3.2]? Log C/He abundance ratiophys.abund;arith.ratiofloatnullablelogCa/He[-11.3/-7.8]? Log Ca/He abundance ratiophys.abund;arith.ratiofloatnullable