J/A+A/691/A211ivo://CDS.VizieR/J/A+A/691/A211doi:10.26093/cds/vizier.36910211CDSLopez-Sanjuan C.Tremblay P.-E.O'Brien M.W.Spinoso D.Ederoclite A.,Vazquez Ramio H.Cenarro A.J.Marin-Franch A.Civera T.Carrasco J.M.,Gaensicke B.T.Gentile Fusillo N.P.Hernan-Caballero A.Hollands M.A.,del Pino A.Dominguez Sanchez H.Fernandez-Ontiveros J.A.,Jimenez-Esteban F.M.Rebassa-Mansergas A.Schmidtobreick L.Angulo R.E.,Cristobal-Hornillos D.Dupke R.A.Hernandez-Monteagudo C.Moles M.,Sodre L.JrVarela J.2025-02-18T20:01:58Z2024-11-15T09:56:35ZCDS support team

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

cds-question@unistra.frwhite-dwarf-starseffective-temperaturestellar-massesWe used the Javalambre Photometric Local Universe Survey (J-PLUS) second data release (DR2) photometry in 12 optical bands over 2176deg^2^ to estimate the fraction of white dwarfs with the presence of Ca II H+K absorption along the cooling sequence. We compared the J-PLUS photometry against metal-free theoretical models to estimate the equivalent width in the J0395 passband of 10nm centered at 395nm (EWJ0395), a proxy to detect calcium absorption. A total of 4399 white dwarfs with effective temperatures within 30000>Teff>5500K and masses of M>0.45M_{sun}_ were analyzed. Their EWJ0395 distribution was modeled using two populations, corresponding to polluted and non-polluted systems, to estimate the fraction of calcium white dwarfs (fCa) as a function of Teff. The probability of each individual white dwarf presenting calcium absorption, pca, was also computed. The comparison of EWJ0395 with both the measured Ca/He abundance and the identification of metal pollution from spectroscopy shows that EWJ0395 correlates with the presence of Ca II H+K absorption. The fraction of calcium white dwarfs changes along the cooling sequence, increasing from fCa~0 at Teff=13500K to fCa~0.15 at Teff=5500K. This trend reflects the selection function of calcium white dwarfs in the optical. We compare our results with the fractions derived from the 40pc spectroscopic sample and from Sloan Digital Sky Survey (SDSS) spectra. The trend found in J-PLUS observations is also present in the 40pc sample; however, SDSS shows a deficit of metal-polluted objects at Teff<12000K. Finally, we found 39 white dwarfs with pca>0.99. Twenty of them have spectra presented in previous studies, whereas we obtained follow-up spectroscopic observations for six additional targets. These 26 objects were all confirmed as metal-polluted systems.The J-PLUS optical data provide a robust statistical measurement for the presence of Ca II H+K absorption in white dwarfs. We find a 15+/-3% increase in the fraction of calcium white dwarfs from Teff=13500K to 5500K, which reflects their selection function in the optical from the total population of metal-polluted systems.2024A&A...691A.211Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/691/A211CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJ/730/128 : Spectroscopy of DA WD from the SDSS-DR4 (Tremblay+, 2011)J/MNRAS/508/3877 : Catalogue of white dwarfs in Gaia EDR3 (Gentile+, 2021)J/A+A/658/A79 : J-PLUS white dwarf atmospheric parametershttp://archive.cefca.es/catalogues/jplus-dr2 : J-PLUS DR2 Home Pagehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/691/A211https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/691/A211http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/691/A211https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/691/A211https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/691/A211http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/691/A211GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/691/A211/wdpca (Atmospheric parameters and calcium absorption for J-PLUS DR2 white dwarfs)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/691/A211/wdpca?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/691/A211/wdpca?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/691/A211/wdpca?GETtext/xml+votable180.050000true105.140523.01470.0055555555555555564/315 400 403 622 928 931 936-938 941 5/10 32-33 139 227 233-235 239 575 578 580-581 604 625 1239 1243 1255 1258-1259 1265-1267 1270 1272-1273 1276 1278 1324 1380 1408 1423 1427 1443 1519 1522 1528 1541 1557 1559 1599 1605-1607 1609 1616 1618 1620 1624 1635-1636 1640 1681 1684 1781 1952 1970-1971 1974-1975 1990 2018 2368-2369 2381-2382 2385-2387 2390 2394 2396 2400-2401 2403 2451 2460 2471 2476-2477 2479 2481 2483 2486-2487 2492-2493 2495 2538 2647 2651 2672 2726 2749 2780-2781 2795-2796 2800 2816 2819-2820 2829 2832 2834 2837 2839 2841 2843 2852 2855 2858-2859 2864 2880 2933-2935 2941 2946 3017 3028-3029 3152-3154 3164 3167 3189 3343-3344 3354 3357-3358 3363 3365-3366 3372-3373 3375 3378 3380 3393 3627 3716 3718-3720 3722-3723 3736 3738-3739 3756-3757 3760-3761 3763 3771 3786-3787 3808-3809 3812 3824 4013 4015 4024-4026 4029-4031 4074 4349 4462-4463 4475 4509-4510 4514 4518 4521 4523-4524 4529 4535-4537 4539-4542 4549 4551 4556 4558 4561-4562 4576-4578 4827 4830 4839 4841 4844-4845 4847-4848 4850-4852 4856 4865 4868 4870-4871 4877 4881-4882 5050 5103 5982 7148 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20157 20170-20174 20192-20194 20287 20335 20340 20344 20346 20372-20373 20375 20398 20409 20411 20416 20431 20440 20442-20443 20445 20447 20464-20465 20469 23911 23922 23934 24017 24020-24021 24023 28015 28026 28059 28081 28084 28101 28112 28149 28151 28372 28375 28381 28413-28415 28470-28471 28509 28534-28535 28540 28557 28559 28568 28570-28571 28573-28574 28581-28582 28586 28589 28629-28631 28637 28639 28645 28647 28667 28669-28671 32459-32460 32462-32463 32477-32479 32484 32486-32488 32492-32493 32495-32496 32499 32504-32505 32511 32597-32599 32602-32605 32607 32613 32615 32620 32624-32625 32629 32631 32637 32639 32669-32671 32679 32682-32683 32692 32694 32712 32733-32735 32740 32742-32744 32747-32748 32753-32755https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/691/A211?format=asciidefaultJ/A+A/691/A211/wdpcaAtmospheric parameters and calcium absorption for J-PLUS DR2 white dwarfsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTileIDIdentifier of the J-PLUS Tile image in the r band where the object was detectedobs.fieldintNUMBERNumber identifier assigned by SExtractor for the object in the r-band imagemeta.id;meta.mainintRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainpcaProbability of having calcium absorptionstat.fit.goodnessfloatEWJ0395Equivalent width in the J0395 passband0.1nmspect.line.eqWidthfloate_EWJ0395Uncertainty in EWJ03950.1nmstat.errorfloatTeffEffective temperatureKphys.temperature.effectivedoublee_TeffUncertainty in TeffKstat.error;phys.temperature.effectivedoubleMassMasssolMassphys.massfloate_MassUncertainty in masssolMassstat.error;phys.massfloat