Cepheid pulsation models at varying metallicity and DY/DZ

Abstract

In this paper we present an extended set of nonlinear convective pulsation models at varying the metallicity and DY/DZ ratio. The predicted instability strip and bolometric light curves are discussed by comparing the new models with our previous ones. In particular, the dependence on both metal and helium abundances is investigated. By transforming the bolometric light curves into the observational bands we are able to derive both Period-Color-Luminosity and Wesenheit relations for each selected chemical composition. Synthetic Period-Luminosity relations are obtained by populating the instability strip according to specific assumptions on the number of pulsators and the mass distribution. These theoretical results are compared with recent accurate data by Sandage et al. and Kervella et al., in order to test the predictive capabilities of the models. We confirm our previous results that the theoretical metallicity correction to the Key Project Cepheid distance scale depends both on the period range and DY/DZ ratio, becoming important for periods longer than 20 days and DY/DZ > 1.5.

arXiv commentaccepted for publication on ApJ

References in corpus (24)

• Final Results from the Hubble Space Telescope Key Project to Measure the Hubble Constant
• The HST Key Project on the Extragalactic Distance Scale XIII. The Metallicity Dependence of the Cepheid Distance Scale
• New Period-Luminosity and Period-Color Relations of Classical Cepheids: I. Cepheids in the Galaxy
• The Effect of Metallicity on Cepheid-Based Distances
• Cepheid Period-Radius and Period-Luminosity Relations and the Distance to the LMC
• Intermediate-mass star models with different helium and metal contents
• New Period-Luminosity and Period-Color Relations of Classical Cepheids: II. Cepheids in LMC
• The effect of metallicity on the Cepheid Period-Luminosity relation from a Baade-Wesselink analysis of Cepheids in the Galaxy and in the Small Magellanic Cloud
• Theoretical Models for Classical Cepheids: II. Period-Luminosity, Period-Color and Period-Luminosity-Color Relations
• Classical Cepheid Pulsation Models. III. The Predictable Scenario
• Deep Hubble Space Telescope/ACS Observations of I Zw 18: a Young Galaxy in Formation
• Cepheid Calibration of the Peak Brightness of SNe Ia. XI. SN 1998aq in NGC 3982
• Cepheid distances from infrared long-baseline interferometry - I. VINCI/VLTI observations of seven Galactic Cepheids
• DY/DZ from fine structure in the Main Sequence based on Hipparcos parallaxes
• RR Lyrae stars in Galactic globular clusters.III. Pulsational predictions for metal content Z=0.0001 to Z=0.006
• Theoretical models for classical Cepheids. VIII. Effects of helium and heavy elements abundance on the Cepheid distance scale
• Pulsation and evolutionary masses of classical Cepheids. I. Milky Way variables
• Theoretical models for Bump Cepheids
• Period-color and amplitude-color relations in classical Cepheid variables
• The Linearity of the Wesenheit function for the Large Magellanic Cloud Cepheids
• On the distance of Magellanic Clouds: first overtone Cepheids
• Cepheid distances from infrared long-baseline interferometry - II. Calibration of the Period-Radius and Period-Luminosity relations
• Period-luminosity relations for Galactic Cepheid variables with independent distance measurements
• On the pulsation mode identification of short-period Galactic Cepheids

Cited by in corpus (94)

• A 3% Solution: Determination of the Hubble Constant with the Hubble Space Telescope and Wide Field Camera 3
• A Redetermination of the Hubble Constant with the Hubble Space Telescope from a Differential Distance Ladder
• Carnegie Hubble Program: A Mid-Infrared Calibration of the Hubble Constant
• The Hubble Constant: A Summary of the HST Program for the Luminosity Calibration of Type Ia Supernovae by Means of Cepheids
• The influence of chemical composition on the properties of Cepheid stars. II-The iron content
• On the Effect of Rotation on Populations of Classical Cepheids II. Pulsation Analysis for Metallicities 0.014, 0.006, and 0.002
• Insights into the Cepheid distance scale
• I Zw 18 revisited with HST/ACS and Cepheids: New Distance and Age
• Gaia Data Release 2: Variable stars in the colour-absolute magnitude diagram
• Quantitative Spectroscopy of Blue Supergiant Stars in the Disk of M81: Metallicity, Metallicity Gradient and Distance
• Cepheid Calibrations of Modern Type Ia Supernovae:Implications for the Hubble Constant
• Gaia Data Release 1. Testing the parallaxes with local Cepheids and RR Lyrae stars
• Old-Aged Stellar Population Distance Indicators
• On the distance of the Magellanic Clouds using Cepheid NIR and optical-NIR Period Wesenheit Relations
• Gaia Data Release 1 - The Cepheid & RR Lyrae star pipeline and its application to the south ecliptic pole region
• Comparison of Distances from RR Lyrae Stars, the Tip of the Red-Giant Branch and Classical Cepheids
• Cepheids in external galaxies. I. The maser-host galaxy NGC 4258 and the metallicity dependence of P-L and P-W relations
• The VMC Survey. V. First results for Classical Cepheids
• A Study of Cepheids in M81 with the Large Binocular Telescope (Efficiently Calibrated with HST)
• Classical Cepheid Pulsation Models. XI. Effects of convection and chemical composition on the Period-Luminosity and Period-Wesenheit relations
• Blue Straggler masses from pulsation properties. I. The case of NGC6541
• The panchromatic view of the Magellanic Clouds from Classical Cepheids. I. Distance, Reddening and Geometry of the Large Magellanic Cloud disk
• Cepheid theoretical models and observations in HST/WFC3 filters: the effect on the Hubble constant Ho
• Galactic Cepheids with Spitzer: I. Leavitt Law and Colors
• An Improved Calibration of the Wavelength Dependence of Metallicity on the Cepheid Leavitt law
• Uncertainties on the theoretical predictions for classical Cepheid pulsational quantities
• New NIR light-curve templates for classical Cepheids
• The expansion field: The value of H_0
• Pulsation Models for Ultra-Low (Z=0.0004) Metallicity Classical Cepheids
• The VMC Survey. VIII. First results for Anomalous Cepheids
• Classical Cepheid period-Wesenheit-metallicity relation in the Gaia bands
• A Global Physical Model for Cepheids
• On the Application of Wesenheit Function in Deriving Distance to Galactic Cepheids
• An updated metal-dependent theoretical scenario for Classical Cepheids
• New period-luminosity and period-color relations of classical Cepheids. IV. The low-metallicity galaxies IC 1613, WLM, Pegasus, Sextans A and B, and Leo A in comparison to SMC
• High-precision distance measurements with classical pulsating stars
• The VMC Survey. XIX. Classical Cepheids in the Small Magellanic Cloud
• Multi-Epoch HST Observations of IZw18: Characterization of Variable Stars at Ultra-Low Metallicities
• Synthetic properties of bright metal-poor variables. II. BL Her stars
• The VMC survey - XXIII. Model fitting of light and radial velocity curves of Small Magellanic Cloud classical Cepheids
• The Carnegie Chicago Hubble Program: The Mid-Infrared Colours of Cepheids and the Effect of Metallicity on the CO Band-head at $4.6\mu$m
• Theoretical fits of the δCephei light, radius and radial velocity curves
• An extended theoretical scenario for Classical Cepheids. I. Modeling Galactic Cepheids in the Gaia photometric system
• A Comparative Study of Multiwavelength Theoretical and Observed Light Curves of Cepheid Variables
• Using classical Cepheids to study the far side of the Milky Way disk: I. Spectroscopic classification and the metallicity gradient
• Period-Age-Metallicity and Period-Age-Color-Metallicity relations for Classical Cepheids: an application to the Gaia EDR3 sample
• On the Period--Luminosity--Metallicity relation of Classical Cepheids
• A new and homogeneous metallicity scale for Galactic classical Cepheids II. The abundance of iron and alpha elements
• Temperature Differences in the Cepheid Instability Strip Require Differences in the Period-Luminosity Relation in Slope and Zero Point
• Ultra Long Period Cepheids: a primary standard candle out to the Hubble flow
• The Cepheid distance to the maser-host galaxy NGC 4258: Studying systematics with the Large Binocular Telescope
• On a new and homogeneous metallicity scale for Galactic classical Cepheids - I. Physical parameters
• Nonlinear Period-Luminosity Relation for the Large Magellanic Cloud Cepheids: Myths and Truths
• CORS Baade-Wesselink distance to the LMC NGC 1866 blue populous cluster
• The Araucaria Project. A Wide-Field Photometric Survey for Cepheid Variables in NGC 3109
• Observational studies of Cepheid amplitudes. II Metallicity dependence of pulsation amplitudes
• Spectroscopic properties of a two-dimensional time-dependent Cepheid model II. Determination of stellar parameters and abundances
• The Metallicity Dependence of the Cepheid P-L Relation in M101
• Updated theoretical Period-Age and Period-Age-Color relations for Galactic Classical Cepheids: an application to the Gaia DR2 sample
• Blue straggler masses from pulsation properties. II. Topology of the Instability Strip
• Investigations of the Non-Linear LMC Cepheid Period-Luminosity Relation with Testimator and Schwarz Information Criterion Methods
• A critical discussion on the $H_0$ tension
• On the Enhancement of Mass Loss in Cepheids Due to Radial Pulsation. II. The Effect of Metallicity
• Infrared photometry of Cepheids in the LMC clusters NGC 1866 and NGC 2031
• Spectroscopic properties of a two-dimensional time-dependent Cepheid model I. Description and validation of the model
• Cepheid Metallicity in the Leavitt Law (C- MetaLL) survey: VI: Radial abundance gradients of 29 chemical species in the Milky Way Disk
• The VMC Survey - XX. Identification of new Cepheids in the Small Magellanic Cloud
• Problems and possibilities in fine-tuning of the Cepheid P-L relationship
• The Cepheids of NGC1866: A Precise Benchmark for the Extragalactic Distance Scale and Stellar Evolution from Modern UBVI Photometry
• Theoretical Cepheid Period-Luminosity And Period-Color Relations In Spitzer IRAC Bands
• Predicted properties of Galactic and Magellanic Classical Cepheids in the SDSS filters
• Period-Color and Amplitude-Color Relations in Classical Cepheid Variables - VI. New Challenges for Pulsation Models
• Young and Intermediate-age Distance Indicators
• Dissecting Galaxies with Quantitative Spectroscopy of the Brightest Stars in the Universe
• Predicted masses of Galactic Cepheids in the Gaia Data Release 2
• A hierarchical Bayesian model to infer PL(Z) relations using Gaia parallaxes
• New insights into the use of Ultra Long Period Cepheids as cosmological standard candles
• Search for Classical Cepheids in Galactic Open Clusters and Calibration of the Period Wesenheit Metallicity Relation in the Gaia Bands
• Distances to Galaxies from the Brightest Stars in the Universe
• Allan Sandage and the Cosmic Expansion
• Stellar Populations in the Galactic Center
• Classical Cepheids, what else?
• Multipopulation aftereffects on the color-magnitude diagram and Cepheid variables of young stellar systems
• On the impact of Helium abundance on the Cepheid Period-Luminosity and Wesenheit relations and the Distance Ladder
• The influential effect of blending, bump, changing period and eclipsing Cepheids on the Leavitt law
• The VELOCE modulation zoo II. Humps and splitting patterns in spectral lines of classical Cepheids
• Pulsating variable stars in the Magellanic Clouds
• Asteroseismology, standard candles and the Hubble Constant: what is the role of asteroseismology in the era of precision cosmology?
• Cepheid Metallicity in the Leavitt Law (C-MetaLL) survey: IX. Metallicity dependence of Period-Wesenheit relations based on a homogeneous spectroscopic sample
• The light curve model fitting of LMC Cepheids: MESA-RSP versus Stellingwerf's code predictions
• Empirical instability strip for classical Cepheids II. The Small Magellanic Cloud galaxy
• The CUBES Science Case
• Multiwavelength light curve analysis of Cepheid variables
• Very metal poor Classical Cepheids: variables in IZw18