J/A+A/576/A30ivo://CDS.VizieR/J/A+A/576/A30doi:10.26093/cds/vizier.35760030CDSInno L.Matsunaga N.Romaniello M.Bono G.Monson A.Ferraro I.,Iannicola G.Persson E.Buonanno R.Freedman W.Gieren W.,Groenewegen M.A.T.Ita Y.Laney C.D.Lemasle B.Madore B.F.,Nagayama T.Nakada Y.Nonino M.Pietrzynski G.Primas F.Scowcroft V.,Soszynski I.Tanabe T.Udalski A.2018-05-29T17:16:40Z2015-06-12T15:43:11ZCDS support team

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

cds-question@unistra.frvariable-starsinfrared-photometryWe present new near-infrared (NIR) light-curve templates for fundamental (FU, J, H, Ks) and first overtone (FO, J) classical Cepheids. The new templates together with period-luminosity and period-Wesenheit (PW) relations provide Cepheid distances from single-epoch observations with a precision only limited by the intrinsic accuracy of the method adopted. The templates rely on a very large set of Galactic and Magellanic Cloud Cepheids (FU, ~600; FO, ~200) with well-sampled NIR (IRSF data set) and optical (V, I; OGLE data set) light-curves. To properly trace the change in the shape of the light-curve as a function of pulsation period, we split the sample of calibrating Cepheids into ten different period bins. The templates for the first time cover FO Cepheids and the short-period range of FU Cepheids (P<=5-days). Moreover, the phase zero-point is anchored to the phase of the mean magnitude along the rising branch. The new approach has several advantages in sampling the light-curve of bump Cepheids when compared with the canonical phase of maximum light. We also provide new empirical estimates of the NIR-to-optical amplitude ratios for FU and FO Cepheids. We perform detailed analytical fits using seventh-order Fourier series and multi-Gaussian periodic functions. The latter are characterized by fewer free parameters (nine vs. fifteen). The mean NIR magnitudes based on the new templates are up to 80% more accurate than single-epoch NIR measurements and up to 50% more accurate than the mean magnitudes based on previous NIR templates, with typical associated uncertainties ranging from 0.015mag (J band) to 0.019mag (K_S_ band). Moreover, we find that errors on individual distance estimates for Small Magellanic Cloud Cepheids derived from NIR PW relations are essentially reduced to the intrinsic scatter of the adopted relations. Thus, the new templates are the ultimate tool for estimating precise Cepheid distances from NIR single-epoch observations, which can be safely adopted for future interesting applications, including deriving the 3D structure of the Magellanic Clouds.2015A&A...576A..30Ihttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/576/A30CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/AJ/128/2239 : JHKs photometry of 92 LMC Cepheids (Persson+, 2004)J/ApJS/193/12 : JHK photometry of Northern Galactic Cepheids (Monson+, 2011)J/AcA/58/163 : VI light curves of LMC classical Cepheids (Soszynski+, 2008)J/AcA/60/17 : VI light curves of SMC classical Cepheids (Soszynski+, 2010)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/576/A30https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/576/A30http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/576/A30https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/576/A30https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/576/A30http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/576/A30GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/576/A30/cepheids (Pylsation parameters for the calibrating Cepheids: FU (fundamental, table2) and FO (first overtone, table3))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/576/A30/cepheids?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/576/A30/cepheids?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/576/A30/cepheids?GETtext/xml+votable180.050000true119.5920364-29.13009470.0055555555555555565/8275 8280 6/1239 1340 1388 1426 1429 1431-1432 1445 1467 1625 1765 1824 1829 1836 1858 3000 3005 3033 3045 3342 3361 3599-3600 3616 12934 12968 12970-12971 12987 13201 13288 13309-13310 13931 13933 14047 14205 14238 14260 14262 14267 14271 14283 14295 14303 14323-14324 14328 14402 14404 14409 14411 14424 14427 14431 14436 14445 14601 14625 14630 14690 14709 14718 15360 15618 15698 21514 21542 21632 21648 21671 22044 22071 22124 22219 22227 23619 23622 23635 23662 23778 23852 23922 24002 24326 24372 24411 24453 24478-24479 28779 29081 29095 29104 29126 29166 29468 29533 29665 29772 29875 29897 30211 30222 30245 30258 30270 30321-30322 30333 30504 30641 33053-33054 33073 33075-33078 33088 33091 33094-33095 33098-33099 33106 33126 33293 33295 33306 33317 33804 37888 37931 38022 39771 41461 41667 41673 41722 41810 41862 423787.952274030004205e-20 3.852589004194616e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/576/A30?format=asciiInfrareddefaultJ/A+A/576/A30/cepheidsPylsation parameters for the calibrating Cepheids: FU (fundamental, table2) and FO (first overtone, table3)SimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintModemeta.code;src.varcharGalGalaxy (MW, LMC or SMC)src.class.starGalaxycharIDPrimary identificationmeta.id;meta.maincharOIDOGLE identification for LMC and SMC Cepheids (LMC-CEP-NNNN or SMC-CEP-NNNN)meta.idcharlogP[0.15/1.84] log(Period)log(d)arith.zpdouble<Vmag>Average V magnitudemagphot.mag;em.opt.Vfloat<Jmag>? Average J magnitudemagphot.mag;em.IR.Jfloatnullable<Hmag>? Average H magnitudemagphot.mag;em.IR.Hfloatnullable<Ksmag>? Average Ks magnitudemagphot.mag;em.IR.KfloatnullableVampAmplitude of pulsation in V bandmagphot.mag;em.opt.VfloatJamp? Amplitude of pulsation in J bandmagphot.mag;em.IR.JfloatnullableHamp? Amplitude of pulsation in H bandmagphot.mag;em.IR.HfloatnullableKamp? Amplitude of pulsation in Ks bandmagphot.mag;em.IR.KfloatnullableJD0Zero-point, defined as the epoch of the mean magnitude along the rising branchdtime.epochdoubleSamSample designation (1)meta.idchar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.main