J/ApJ/944/56ivo://CDS.VizieR/J/ApJ/944/56doi:10.26093/cds/vizier.19440056CDSAmorim L.L.Kepler S.O.Kulebi B.Jordan S.Romero A.D.2025-10-13T20:09:28Z2025-02-26T08:58:24ZCDS support team

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

cds-question@unistra.frwhite-dwarf-starsmagnetic-fieldseffective-temperaturevisible-astronomyspectroscopyWhite dwarfs are excellent research laboratories as they reach temperatures, pressures, and magnetic fields that are unattainable on Earth. To better understand how these three physical parameters interact with each other and with other stellar features, we determined the magnetic field strength for a total of 804 hydrogen-rich white dwarfs (WDs) of which 287 are not in the literature. We fitted the spectra observed with the Sloan Digital Sky Survey using atmospheric models that consider the Zeeman effect due to the magnetic field at each point in the stellar disk. Comparing magnetic and nonmagnetic WDs, the literature already shows that the magnetic ones have on average higher mass than the nonmagnetic. In addition to that, magnetic fields are more common in cooler WDs than in hotter WDs. In consonance, we found that those with higher magnetic field strengths tend to have higher masses, and lower temperatures, for which models indicate the crystallization process has already started. This reinforces the hypothesis that the field is being generated and/or amplified in the cooling process of the white dwarf. Our sample constitutes the largest number of white dwarfs with determined magnetic fields to date.2023ApJ...944...56Ahttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/944/56CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/294 : The SDSS Photometric Catalog, Release 7 (Adelman-McCarthy+, 2009)II/306 : The SDSS Photometric Catalog, Release 8 (Adelman-McCarthy+, 2011)V/139 : The SDSS Photometric Catalog, Release 9 (Adelman-McCarthy+, 2012)V/147 : The SDSS Photometric Catalogue, Release 12 (Alam+, 2015)V/154 : Sloan Digital Sky Surveys (SDSS), Release 16 (DR16) (Ahumada+, 2020)J/AJ/130/734 : Magnetic WDs from SDSS DR2 and DR3 (Vanlandingham+, 2005)J/A+A/506/1341 : Magnetic fields in white dwarfs (Kuelebi+, 2009)J/MNRAS/429/2934 : SDSS magnetic white dwarf stars (Kepler+, 2013)J/MNRAS/480/1547 : Full Evolutionary Sequences of Massive WDs (Lauffer+, 2018)J/MNRAS/499/1890 : Gaia white dwarfs within 40pc. II. (McCleery+, 2020)J/MNRAS/508/3877 : Catalogue of white dwarfs in Gaia EDR3 (Gentile+, 2021)J/ApJ/935/L12 : Magnetic field measurements of young WDs (Bagnulo+, 2022)J/MNRAS/518/3055 : Gaia white dwarfs within 40pc. III (O'Brien+, 2023)J/A+A/682/A5 : Gaia white dwarfs Classification (Vincent+, 2024)J/A+A/690/A10 : Magnetic fields in featureless WDs (Berdyugin+, 2024)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/944/56https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/944/56http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/944/56https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/944/56https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/944/56http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/944/56GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/944/56/table1 (The SDSS magnetic white dwarfs rich in hydrogen (DAHs))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/944/56/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/944/56/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/944/56/table1?GETtext/xml+votable180.050000true173.054125-0.51022220.0055555555555555565/5721 6/27-28 48 258 521 693 706 725 727 898 904-905 914 920 990 992 1009 1700 1703 2035 2039 2065-2066 2072 2089 2250 2300 2640 2644 2679 4097 4125 4134 4147 4151 4156 4188-4189 4192 4194 4201-4202 4204 4218-4219 4222 4227 4229 4239 4248 4250-4251 4257-4258 4263 4272 4276 4279 4285-4286 4290 4298 4331 4333 4344 4363 4387 4394 4416 4419 4431 4438 4454 4475 4493 4503 4509-4510 4512 4521 4525 4530 4536-4537 4540 4546 4586 4589 4622 4626 4640 4644 4654 4657 4673-4675 4694 4699 4703 4705 4708 4715 4717 4720 4723 4738 4745 4748 4755 4766 4770 4782 4793 4800 4810 4812-4813 4820 4822 4845 4852 4868 4880-4882 4892-4893 4896 4914 4947 4968 4981 4998 5011 5022 5030 5035 5042 5063 5081 5094-5095 5121 5124 5132 5154 5178-5179 5182 5193 5225 5227 5235 5260-5261 5266 5276 5296 5352 5356 5358 5367 5381 5398 5431 5470 5475 5508 5522 5539 5596 5598 5613 5616 5667 5676 5748 5776 5783 5795-5796 5804 5835 5852 5859 5896 5910 5916 5942 5950 5968 6009 6011 6050 6086 6091 6103 6107 6118 6120 6161 6218 6242 6245 6255 6300 6306 6344 6357 6362 6384-6385 6398 6402 6418 6443 6450 6452 6456 6459 6468 6485 6499 6510 6558 6560 6568 6604 6736 6738 6916 6932 6977 7163 7180 7183 7223 7236 7248 7253 7261 7282 7287 7299 7316 7320 7325 7328 7368 7397 7433 7439 7466 7476 7504 7522 7524-7525 7528 7553 7555 7788 8139 8142 8168 8207 8219 8224-8225 8267 8276 8297 8311 8329 8359 8363-8364 8413 8448 8461 8463 8469 8474 8501 8507 8516 8519 8525 8529 8532 8564 8591 8624 8653 8657 8662 8666 8692 8708 8713 8749 8844 8853 8860 8882 8911 8945 8965 8972 8982 9035 9044 9048 9074 9092 9096 9099 9211 9230 9238 9256 9258 9270 9280-9281 9290 9311 9325 9333 9340 9342-9343 9383 9426 9433 9477 9479 9510-9511 9583 9602 9606 9642 9742 9747 9762 9793 9797 9801 9833 9849 9873-9874 9876 9878 9885 9890 9900 9903 9945 9948 9988 10002 10030 10075 10085 10094-10095 10104 10114 10194 10213 10233-10234 10236 10252 10286 10290 10326 10357 10382 10386 10410 10412 10437 10497 10525 10536 10570 10583-10585 10599 10622 10632 10665 10680 10696 10713 10734 10739 10769 10776 10782 10853 10856 10858 10860 10862 10887 10906 10936 10949 10981 11082 11094 11111 11150 11159 11203 11213 11217 11224 11243 11258 11305 11346 11376 11379 11425 11444 11450 11470 11484 11489 11810 11812 11827 11836-11837 11880 11942-11943 11945 12308 12357 12399 12538 12551-12552 12743 12789 12818 12820-12821 13345 13383 13391 13415 13424 13434 13637 13649 13805 13810 14157 14996 15917-15918 16272-16273 16894 17256 17298 17362 17550 17556 17749 17763 17772 17774 17797 17806 17815-17816 17820 17836 17869 17904 17913 17982 18020 18069 18112 18169 18275 18321 18392 18398 18410 18750 18777 18788 18795 18838-18839 18852 18855 18864 18881 18910 18948 19021-19022 19031 19033 19045 19050-19051 19058 19187 19271 19294 19380 19411 19415 19511 19538 19599 19679 19727 19735 19747 19758 19780 19797 19840 19880 19919 19941 19990 19992 20033 20153 20155 20248 20252 20268 20311 20452 20455 20472 21597 21783 21852 21878 21964 21967 21970 22008-22010 22015 22352-22353 22360 22391 22654 22715 22740 22760 22893 23049 23052 23196 23204 23206 23208 23214 23216 23218 23232 23272 23275 23399 23418 23464 23466 24060 25333 25335 25340 25947 25950 25975-25976 26070 26166 26191 26207 26239 26262 26275-26277 26287-26288 26360 26392 26421 26444 26447 26482-26483 26501 26521 26561 26572 26593 26602 26946 26956 26963 26977 26980 26984 27059 27112 27116 27199 27230 27243 27248 27251 27254 27256 27282 27285 27310 27313 27315-27316 27328 27330 27342 27354 27363 27396 27405 27427 27438 27476 27491 27522 27545 27573 27580 27585 27605 27622 27635 27637 27656 27703 27710-27711 27726 27811 27817-27818 27822 27865 27876 27884 27917 27932 27934 27936 27948-27949 27953 27956 27975 27990 28043 28067 28076 28145 28222-28223 28229 28238 28276 28333 28337 28372 28381 28383 28432 28437 28539 28555 28558 28566 28569 28572 28583 28592 28615 28620 28624 30038 31339 31367 31388 31402 31424 31433 31435 31438 31443 31446 31452 31598 31611-31612 31619 31621 31633 31642 31649 31651 31653 31672 31674 31678 31684 31692 31707 31713 31907 32426 32443 32481 32484 32489-32490 32497 32509 32556 32672 36728 36733 36786 36809 36838 45048 45054 49011 49014 49016 49020-49022 49077https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/944/56?format=asciiOpticaldefaultJ/ApJ/944/56/table1The SDSS magnetic white dwarfs rich in hydrogen (DAHs)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSDSSSDSS Position-based identifier (JHHMMSS.ss+DDMMSS.s)meta.id;meta.maincharSp-IDSDSS Plate-MJD-Fiber identifiermeta.id;obscharMstar[0.18/1.4]? Mass (1)solMassphys.massfloatnullableTeff[5212/67365]? Effective Temperature (1)Kphys.temperature.effectiveintnullableTSDSS[8000/50000] Temperature used for model (2)Kphys.temperatureintB[0.5/779] Dipole magnetic field strength of the offset dipole from best fit YAWP model (3)MGphys.magField;meta.modelledfloate_B? Uncertainty in B (4)MGstat.error;phys.magFieldcharzoff[-0.5/0.5]? Z-offset from the center in the YAWP model in stellar radius R_*_ (3)pos;arith.difffloatnullablei[0/90] Inclination of the dipole in the YAWP model to the line of sight (3)degsrc.orbital.inclination;meta.modelledfloatspOnline SDSS interactive spectrum from SDSS-DR17meta.ref.urlcharSimbadSimbad column added by the CDSmeta.ref.urlchar_RAPositions from SDSS names (right ascension part)degpos.eq.ra;meta.main_DEPositions from SDSS names (declination part)degpos.eq.dec;meta.main