J/A+A/684/A170ivo://CDS.VizieR/J/A+A/684/A170doi:10.26093/cds/vizier.36840170CDSDas S.Molnar L.Kanbur S.M.Joyce M.Bhardwaj A.Singh H.P.,Marconi M.Ripepi V.Smolec R.2024-11-29T20:01:45Z2024-04-19T09:19:27ZCDS support team

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

cds-question@unistra.frvariable-starsastronomical-modelschemical-abundancesphotometryvisible-astronomyIn the era of the Hubble tension, it is crucial to obtain a precise calibration of the period-luminosity (PL) relations of classical pulsators. Type II Cepheids (T2Cs; often exhibiting negligible or weak metallicity dependence on PL relations) used in combination with RR Lyraes and the tip of the red giant branch may prove useful as an alternative to classical Cepheids for the determination of extragalactic distances. We present new theoretical period-luminosity (PL) and period-Wesenheit (PW) relations for a fine grid of convective BL Her, the shortest period T2Cs, models computed using MESA-RSP and compare our results with the empirical relations from Gaia DR3. We use the state-of-the-art 1D non-linear radial stellar pulsation tool MESA-RSP to compute models of BL Her stars over a wide range of input parameters - metallicity (-2.0dex<=[Fe/H]<=0.0dex), stellar mass (0.5M_{sun}_-0.8M_{sun}_), stellar luminosity (50L_{sun}_-300L_{sun}_) and effective temperature (full extent of the instability strip; in steps of 50K). The BL Her stars in the All Sky region exhibit statistically different PL slopes compared to the theoretical PL slopes computed using the four sets of convection parameters. We find the empirical PL and PW slopes from BL Her stars in the Magellanic Clouds to be statistically consistent with the theoretical relations computed using the different convection parameter sets in the Gaia passbands. There is negligible effect of metallicity on the PL relations in the individual Gaia passbands. However, there exists a small but significant negative coefficient of metallicity in the PWZ relations for the BL Her models using the four sets of convection parameters. This could be attributed to the increased sensitivity of bolometric corrections to metallicities at wavelengths shorter than the V band. Our BL Her models also suggest a dependence of the mass-luminosity relation on metallicity. We found the observed Fourier parameter space to be covered well by our models. Higher mass models (>0.6M_{sun}_) may be needed to reliably model the observed light curves of BL Her stars in the All Sky region. We also found the theoretical light curve structures (especially the Fourier amplitude parameters) to be affected by the choice of convection parameters.2024A&A...684A.170Dhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/684/A170CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/355 : Gaia DR3 Part 1. Main source (Gaia Collaboration, 2022)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/684/A170https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/684/A170http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/684/A170https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/684/A170https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/684/A170http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/684/A170GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/684/A170/table4 (Light curve parameters of observed BL Her stars from the Gaia DR3 catalogue)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/684/A170/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/684/A170/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/684/A170/table4?GETtext/xml+votable180.050000true263.9789397-22.57414390.0055555555555555565/7179 7205 7216-7217 7226 8274 6/1861 3008 3052 4364 4392 6386 6811 9395 9436 10117 12405 12542 12685 12872 12904 12967 12984 12993 13307 14049 14265 14345 14351 14401 14416 14421 14493 14536 14559 14562 15237 15369 15398 15412 15434 15447 15684 17424 17882 18389 19720 21514 22120 23332 24503 27390 28675 28685 28696 28701 28704 28709-28712 28714 28729-28732 28734-28735 28741 28747 28750 28754 28763 28771 28777-28782 28789 28792-28793 28795-28796 28799-28800 28802 28804-28806 28815 28829 28836 28838-28839 28841 28844 28846-28847 28849-28850 28854-28856 28860 28872 28876 28882 28884 28890 28893-28895 28898 28909-28911 28914 28922 28930 28957 28961 28964 28973 29057 29059-29060 29067-29069 29093 29111 29122 29150 29160 29166 29174 29184-29185 29187-29188 29191 29195-29196 29199 29203-29204 29206 29216 29219 29222-29223 29225 29248 29251-29252 29257 29260-29261 29272 29274 29276 29283 29287 29289 29293 29326 29336 29428 29440 29452 29474 29488 29490 29493 29525 29540 29575 29652 29654 29758 29769 29802 29852 29881 29955 30194 30211 30215 30219 30239 30244 30260 30277 30297 30308 30329 30347 30354 30398 30436 30445 30507 30596 30630 30648 30705 30743 30773 30775 30870 31049 31057 31192 31584 31778 31792 31815 31820 31905 32000 32072 32090 32093 32170 32842 32954 33043 33045-33046 33049 33051-33052 33055 33059 33061 33077-33078 33084 33090-33091 33094-33095 33100 33102 33105 33109 33114-33115 33118 33121-33123 33137 33141 33144-33145 33287 33294-33295 33304-33305 33307 33316-33317 33324 33331 33445 33800-33801 36892 37007 37231 37244 37294 37347 37504 37513 37701 37742 37807 37820 37933 37978 38077 38596 39158 39307 39725 39782 39838 40052 40167 40627 41102 41311 41399 41413 41446 41471 41535 41555 41587 41596 41611 41626 41664 41685 41719 41742 41804 41824 41831 41837 41865 41876 41878 41894 41897 42022 42050 42109 42116 42123 42141-42142 42151-42152 42161 42164 42186 42209 42222 42258 42278 42300 42323 42333 42335 42337 42346-42347 42351 42354-42355 42367 42410-42411 42426 42430 42433 42476-42477 42479-42480 42490 42503 42515 42547 42561 42564 42577 42599 42674 42765 42780 42792 42807 42822 42829 42832-42833 42836-42837 42841 42847 42863 42865 42869-42870 42907 42925 42965 43026-43027 43046 43098 43133 43153 43227 43411 43624 43656 44176 44310 44369 44560 46059 46302 47127 47168 47268 47285 47726 47914 48035 48525https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/684/A170?format=asciiOpticaldefaultJ/A+A/684/A170/table2Light curve parameters of BL Her models computed using MESA-RSPrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintZMass fraction of heavy elementsphys.abund.ZdoubleXMass fraction of hydrogenphys.abund.XdoublelambdaGaia passband: G, Gbp, Grpinstr.bandpasscharMStellar mass in units of solar masssolMassphys.massfloatModeMode of pulsation (FU=Fundamental)meta.code;src.varcharTeffEffective temperatureKphys.temperature.effectiveintlogLStellar luminosity in units of solar luminositylog(solLum)phys.luminosityintlogPLogarithmic pulsation periodlog(d)time.periodfloatAmpAmplitude of the theoretical light curvemagphot.magfloatm0Mean magnitudemagphot.magfloatR21Fourier amplitude parameter R21src.var.amplitudefloatR31Fourier amplitude parameter R31src.var.amplitudefloatphi21Fourier phase parameter phi21stat.Fourierfloatphi31Fourier phase parameter phi31stat.FourierfloatlogRStellar radius in units of solar radiuslog(solRad)phys.size.radius;arith.ratiofloatSetConvection set usedinstr.setupcharJ/A+A/684/A170/table4Light curve parameters of observed BL Her stars from the Gaia DR3 catalogueSimbadSimbad column added by the CDSmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSub-regionGaia DR3 sub-region (All Sky, LMC, SMC)meta.id.parentcharlambdaGaia passband: G, Gbp, Grpinstr.bandpasscharGaiaDR3Gaia DR3 Source IDmeta.id;meta.mainlogPLogarithmic pulsation periodlog(d)time.periodfloatOrderOrder of Fourier fit (N= 4 to 8)stat.fit.param;meta.modelledintAmpAmplitude of the observed light curvemagphot.magfloatm0Mean magnitudemagphot.magfloate_m0Error in mean magnitudemagstat.errorfloatR21Fourier amplitude parameter R21src.var.amplitudefloate_R21Error in the Fourier amplitude parameter R21stat.errorfloatR31Fourier amplitude parameter R31src.var.amplitudefloate_R31Error in the Fourier amplitude parameter R31stat.errorfloatphi21Fourier phase parameter phi21stat.Fourierfloate_phi21Error in the Fourier phase parameter phi21stat.errorfloatphi31Fourier phase parameter phi31stat.Fourierfloate_phi31Error in the Fourier phase parameter phi31stat.errorfloat_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