J/MNRAS/449/574ivo://CDS.VizieR/J/MNRAS/449/574doi:10.26093/cds/vizier.74490574CDSRocchetto M.Farihi J.Gansicke B.T.Bergfors C.2024-08-14T20:21:27Z2016-01-06T15:09:52ZCDS support team

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

cds-question@unistra.frwhite-dwarf-starsstellar-massesmillimeter-astronomyphotometrysubmillimeter-astronomyWhite dwarfs whose atmospheres are polluted by terrestrial-like planetary debris have become a powerful and unique tool to study evolved planetary systems. This paper presents results for an unbiased Spitzer Infrared Array Camera search for circumstellar dust orbiting a homogeneous and well-defined sample of 134 single white dwarfs. The stars were selected without regard to atmospheric metal content but were chosen to have (1) hydrogen-rich atmospheres, (2) 17000<Teff<25000K and correspondingly young post-main-sequence ages of 15-270Myr, and (3) sufficient far-ultraviolet brightness for a corresponding Hubble Space Telescope COS snapshot. Five white dwarfs were found to host an infrared bright dust disc, three previously known, and two reported here for the first time, yielding a nominal 3.7^+2.4^_-1.0_ percent of white dwarfs in this post-main-sequence age range with detectable circumstellar dust. Remarkably, the complementary Hubble observations indicate that a fraction of 27 percent show metals in their photosphere that can only be explained with ongoing accretion from circumstellar material, indicating that nearly 90 percent of discs escape detection in the infrared, likely due to small emitting surface area. This paper also presents the distribution of disc fractional luminosity as a function of cooling age for all known dusty white dwarfs, suggesting possible disc evolution scenarios and indicating an undetected population of circumstellar discs.2015MNRAS.449..574Rhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/449/574CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-tohttp://www.astronomy.villanova.edu/WDcatalog : Villanova white dwarf cataloghttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/449/574https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/449/574http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/449/574https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/449/574https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/449/574http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/449/574GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/449/574/tablea1 (Stellar parameters and flux determinations for the science targets)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/449/574/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/449/574/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/449/574/tablea1?GETtext/xml+votable180.050000true0.645416717.45550.0055555555555555566/220 419 480 748 905 2102 2184 4458 5118 5166 5190 5636 5713 5760 5927 6118 7257 7312 7483 7498 7606 7672 8280 8442 8475 8683 8965 9044 9165 9484 9602 10297 10462 10504 10637 11027 11416 11712 11984 12541 12746 12901 12936 13322 13327 13352 16438 16451 16599 17007 17451 17683 17685 17699 17879 18246 18341 18562 18652 18972 19141 19340 19428 19629 19702 19819 19979 20100 20152 22675 23013 23151 23241 23476 23495 23544 24629 24659 25034 25276 25326 25607 25792 25943 26258 26282 26305 26326 26464 27209 27218 27338 27504 27594 27631 27839 28002 28183 28212 28559 30465 31265 31290 31451 31714 32341 33514 33984 34310 34398 34405 34625 34966 34975 35258 35376 35790 35839 36063 36081 36120 36370 36469 38389 40273 40944 41157 42760 43130 43928 44992 45031 45632 45802 47047 48378 48728 488632.5144872812864278e-20 5.517906024225661e-20https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/449/574?format=asciiRadiodefaultJ/MNRAS/449/574/tablea1Stellar parameters and flux determinations for the science targetsSimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintWDWD name (HHMM+DDd.N)meta.id;meta.maincharTeffEffective temperatureKphys.temperature.effectiveintloggSurface gravitylog(cm.s**-2)phys.gravityfloatVmag? V magnitudemagphot.mag;em.opt.VfloatnullableMwd? WD masssolMassphys.massfloatnullableMms? Main-sequence progenitor masssolMassphys.massfloatnullablelog(tcool)Cooling timelog(yr)time.epochfloatF3.6um? Flux at 3.6umuJyphot.mag;em.IR.3-4umintnullablee_F3.6um? rms uncertainty on F3.6umuJystat.errorintnullableF4.5um? Flux at 4.5umuJyphot.mag;em.IR.4-8umintnullablee_F4.5um? rms uncertainty on F4.5umuJystat.errorintnullableF5.7um? Flux at 5.7umuJyphot.flux.density;em.IR.4-8umintnullablee_F5.7um? rms uncertainty on F5.7umuJystat.errorintnullableF7.9um? Flux at 7.9umuJyphot.flux.density;em.IR.8-15umintnullablee_F7.9um? rms uncertainty on F7.9umuJystat.errorintnullable_RAPositions from Simbad and http://www.astronomy.villanova.edu/WDcatalog/ (right ascension part)degpos.eq.ra;meta.main_DEPositions from Simbad and http://www.astronomy.villanova.edu/WDcatalog/ (declination part)degpos.eq.dec;meta.main