J/ApJ/852/78ivo://CDS.VizieR/J/ApJ/852/78doi:10.26093/cds/vizier.18520078CDSWang S.Chen X.de Grijs R.Deng L.2018-11-30T08:41:55Z2018-10-25T09:25:53ZCDS support team

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

cds-question@unistra.frvariable-starsinfrared-photometrystellar-distanceClassical Cepheids are well-known and widely used distance indicators. As distance and extinction are usually degenerate, it is important to develop suitable methods to robustly anchor the distance scale. Here, we introduce a near-infrared optimal distance method to determine both the extinction values of and distances to a large sample of 288 Galactic classical Cepheids. The overall uncertainty in the derived distances is less than 4.9%. We compare our newly determined distances to the Cepheids in our sample with previously published distances to the same Cepheids with Hubble Space Telescope parallax measurements and distances based on the IR surface brightness method, Wesenheit functions, and the main-sequence fitting method. The systematic deviations in the distances determined here with respect to those of previous publications is less than 1%-2%. Hence, we constructed Galactic mid-IR period-luminosity (PL) relations for classical Cepheids in the four Wide-Field Infrared Survey Explorer (WISE) bands (W1, W2, W3, and W4) and the four Spitzer Space Telescope bands ([3.6], [4.5], [5.8], and [8.0]). Based on our sample of hundreds of Cepheids, the WISE PL relations have been determined for the first time; their dispersion is approximately 0.10mag. Using the currently most complete sample, our Spitzer PL relations represent a significant improvement in accuracy, especially in the [3.6] band which has the smallest dispersion (0.066mag). In addition, the average mid-IR extinction curve for Cepheids has been obtained: A_W1_/A_Ks_~0.560, A_W2_/A_Ks_~0.479, A_W3_/A_Ks_~0.507, A_W4_/A_Ks_~0.406, A_[3.6]_/A_Ks_~0.481, A_[4.5]_/A_Ks_~0.469, A_[5.8]_/A_Ks_~0.427, and A_[8.0]_/A_Ks_~0.427mag.2018ApJ...852...78Whttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/852/78CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/293 : GLIMPSE Source Catalog (I + II + 3D) (IPAC 2008)II/328 : AllWISE Data Release (Cutri+ 2013)II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)J/A+AS/143/211 : Galactic Cepheids BVRI photometry (Berdnikov+, 2000)J/A+A/404/423 : BVI photometry of Galactic Cepheids (Tammann+, 2003)J/A+A/476/73 : Cepheid Period/Luminosity relation calib. (Fouque+, 2007)J/ApJ/707/89 : Variation of mid-IR extinction (Gao+, 2009)J/ApJS/193/12 : JHK photometry of Northern Galactic Cepheids (Monson+, 2011)J/ApJ/743/76 : Spitzer photometry of LMC Cepheids (Scowcroft+, 2011)J/A+A/534/A94 : Milky Way Cepheids radial velocities (Storm+, 2011)J/ApJ/759/146 : Spitzer/IRAC photom. for 37 Galactic Cepheids (Monson+, 2012)J/ApJ/747/50 : Distance to Cepheids using Wesenheit function (Ngeow, 2012)J/MNRAS/420/585 : AKARI observations of SMC Cepheids (Ngeow+, 2012)J/MNRAS/447/3342 : Galactic & LMC Cepheids Fourier parameters (Bhardwaj+, 2015)J/AJ/149/117 : LMC infrared survey. I. Photometry of Cepheids (Macri+, 2015)J/A+A/605/A79 : TGAS Cepheids and RR Lyrae stars (Gaia Collaboration+, 2017)J/ApJ/842/42 : Improved reddenings for 59 Galactic Cepheids (Madore+, 2017)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/852/78https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/852/78http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/852/78https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/852/78https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/852/78http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/852/78GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/852/78/table1 (2MASS and WISE mean magnitudes and distances for our 288 Galactic Cepheids)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/852/78/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/852/78/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/852/78/table1?GETtext/xml+votable180.050000true297.099193327.28650720.0055555555555555565/9482 6/1239 1340 1348 1388 1426 1429 1431 1432 1445 1467 1625 1765 1824 1829 1836 1858 1920 3000 3005 3033 3045 3050 3239 3263 3342 3361 3599 3600 3616 3641 3714 3849 4095 12934 12968 12970 12971 12987 13166 13201 13288 13309 13310 13931 13933 13990 14009 14047 14205 14238 14239 14260 14262 14267 14271 14283 14295 14303 14323 14324 14328 14402 14404 14409 14411 14424 14427 14431 14436 14445 14533 14601 14607 14625 14630 14637 14653 14690 14698 14709 14718 14770 15360 15388 15392 15429 15461 15618 15633 15660 15698 20827 21514 21542 21632 21648 21671 22044 22069 22071 22074 22106 22115 22116 22124 22219 22221 22227 22267 23619 23622 23635 23660 23662 23778 23846 23852 23922 23936 24002 24146 24226 24326 24372 24411 24453 24478 24479 28717 28779 28808 28819 28831 28893 28916 28918 28991 29032 29081 29089 29095 29104 29110 29126 29160 29166 29216 29468 29523 29533 29665 29772 29875 29897 30128 30211 30222 30223 30245 30258 30270 30307 30311 30321 30322 30333 30504 30580 30609 30641 30646 32012 32074 33804 37203 37223 37235 37303 37329 37332 37334 37336 37340 37357 37364 37674 37713 37721 37723 37757 37829 37856 37867 37870 37888 37903 37904 37923 37926 37927 37938 37939 37963 38020 38022 38023 38026 38029 38049 39125 39217 39232 39244 39245 39348 39374 39410 39416 39759 39766 39771 39790 39796 39889 39891 39892 39908 39933 39935 40491 40494 40608 41375 41385 41461 41556 41599 41605 41608 41667 41673 41698 41721 41722 41762 41810 41813 41833 41842 41862 42153 42155 42156 42185 42297 42352 42378 42445 42500 42820 43017 43022 43028 43041 43047 430608.157980699529898e-21 1.7003137259100215e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/852/78?format=asciiInfrareddefaultJ/ApJ/852/78/table12MASS and WISE mean magnitudes and distances for our 288 Galactic CepheidsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIRDisplay the Spitzer/IRAC data for this Cepheid (link to table 3)meta.ref.urlcharNameCepheid namemeta.id;meta.maincharprimarylogPer[0.4/1.9] Log(Period), days from the literaturelog(d)arith.zpfloatJmagAvg[0.8/10.2] mean J magnitude in 2MASS system (1)magphot.mag;em.IR.Jfloate_JmagAvg[0.01/0.09] Uncertainty in Jmagmagstat.errorfloatHmagAvg[0.4/9.7] mean H magnitude in 2MASS system (1)magphot.mag;em.IR.Hfloate_HmagAvg[0.01/0.09] Uncertainty in Hmagmagstat.errorfloatKsmagAvg[0.4/9.6] mean Ks magnitude in 2MASS system (1)magphot.mag;em.IR.Kfloate_KsmagAvg[0.01/0.07] Uncertainty in Ksmagmagstat.errorfloatW1magAvg[0.5/9.4]? mean ALLWISE W1 (3.4um) multi-epoch magnitudemagphot.mag;stat.mean;em.IR.3-4umfloatnullablee_W1magAvg[0.02/0.4]? Uncertainty in W1magmagstat.errorfloatnullableW2magAvg[0.1/9.4]? mean ALLWISE W2 (4.6um) multi-epoch magnitudemagphot.mag;stat.mean;em.IR.4-8umfloatnullablee_W2magAvg[0.02/0.2]? Uncertainty in W2magmagstat.errorfloatnullableW3magAvg[0.6/9.3]? mean ALLWISE W3 (12um) multi-epoch magnitudemagphot.mag;stat.mean;em.IR.8-15umfloatnullablee_W3magAvg[0.01/0.4]? Uncertainty in W3magmagstat.errorfloatnullableW4magAvg[0.5/7.2]? mean ALLWISE W4 (22um) multi-epoch magnitudemagphot.mag;stat.mean;em.IR.15-30umfloatnullablee_W4magAvg[0.02/0.3]? Uncertainty in W4magmagstat.errorfloatnullableDM[5.3/14.8] Derived Distance Modulusmagphot.mag.distModfloate_DM[0.07/0.3] Uncertainty in DMmagstat.errorfloat2MDisplay the 2MASS data (Cutri+ 2003, II/246) within 2"meta.ref.urlcharWISEADisplay the AllWISE data (Cutri+ 2013, II/328) within 2"meta.ref.urlcharSimbadSimbad column added by the CDSmeta.ref.urlchar_RAPositions from SIMBAD (right ascension part)degpos.eq.ra;meta.main_DEPositions from SIMBAD (declination part)degpos.eq.dec;meta.mainJ/ApJ/852/78/table3Spitzer/IRAC mean magnitudes for Galactic CepheidsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameCepheid namemeta.id;meta.maincharlogPer[0.4/1.9] Log(Period), days from the literaturelog(d)arith.zpfloat3.6magAvg[0.4/9.4]? mean Spitzer/IRAC 3.6um magnitude (1)magphot.mag;em.IR.3-4um;stat.meanfloatnullablee_3.6magAvg[0.001/0.06]? Uncertainty in 3.6magmagstat.errorfloatnullable4.5magAvg[1/9.3]? mean Spitzer/IRAC 4.5um magnitude (1)magphot.mag;stat.mean;em.IR.4-8umfloatnullablee_4.5magAvg[0.001/0.07]? Uncertainty in 4.5magmagstat.errorfloatnullable5.8magAvg[4/8.4]? mean Spitzer/IRAC 5.8um magnitude (1)magphot.mag;stat.mean;em.IR.4-8umfloatnullablee_5.8magAvg[0.01/0.05]? Uncertainty in 5.8magmagstat.errorfloatnullable8.0magAvg[3.9/8.4]? mean Spitzer/IRAC 8.0um magnitude (1)magphot.mag;stat.mean;em.IR.4-8umfloatnullablee_8.0magAvg[0.01/0.04]? Uncertainty in 8.0magmagstat.errorfloatnullable