Cepheid metallicity in the Leavitt law (C-MetaLL) survey -- III. Simultaneous derivation of the Gaia parallax offset and Period-Luminosity-Metallicity coefficients

Abstract

Classical Cepheids (DCEPs) are the most important standard candles in the extra-galactic distance scale thanks to the Period-Luminosity ($\mathrm{PL}$), Period-Luminosity-Color ($\mathrm{PLC}$) and Period-Wesenheit ($\mathrm{PW}$) relations that hold for these objects. The advent of the {\it Gaia} mission, and in particular the Early Data Release 3 (EDR3) provided accurate parallaxes to calibrate these relations. In order to fully exploit {\it Gaia} measurements, the zero point (ZP) of {\it Gaia} parallaxes should be determined with an accuracy of a few $\mu \mathrm{as}$. The individual ZP corrections provided by the {\it Gaia} team depend on the magnitude and the position on the sky of the target. In this paper, we use an implicit method that relies on the Cepheid $\mathrm{PL}$ and $\mathrm{PW}$ relations to evaluate the ensemble {\it Gaia} parallax zero point. The best inferred estimation of the offset value needed to additionally correct (after the {\it Gaia} team correction) the {\it Gaia} parallaxes of the present DCEP sample, amounts to $-22\pm 4\mu \mathrm{as}$. This value is in agreement with the most recent literature values and confirms that the correction proposed by the {\it Gaia} team over-corrected the parallaxes.\\ As a further application of our results, we derive an estimate of the Large Magellanic Cloud distance (${\mu }_0=18.49\pm 0.06\mathrm{mag}$), in very good agreement with the currently accepted value obtained through geometric methods.

12 pages, 12 figures, accepted for publication in MNRAS

References in corpus (23)

• The Gaia mission
• A Comprehensive Measurement of the Local Value of the Hubble Constant with 1 km/s/Mpc Uncertainty from the Hubble Space Telescope and the SH0ES Team
• Estimating distances from parallaxes. V: Geometric and photogeometric distances to 1.47 billion stars in Gaia Early Data Release 3
• Gaia Early Data Release 3: Parallax bias versus magnitude, colour, and position
• Cosmic Distances Calibrated to 1% Precision with Gaia EDR3 Parallaxes and Hubble Space Telescope Photometry of 75 Milky Way Cepheids Confirm Tension with LambdaCDM
• A distance to the Large Magellanic Cloud that is precise to one per cent
• Gaia EDR3 view on Galactic globular clusters
• Gaia Early Data Release 3 -- Catalogue validation
• Parallax Systematics and Photocenter Motions of Benchmark Eclipsing Binaries in Gaia EDR3
• The Milky Way Cepheid Leavitt law based on Gaia DR2 parallaxes of companion stars and host open cluster populations
• An Improved Calibration of the Wavelength Dependence of Metallicity on the Cepheid Leavitt law
• The Parallax Zero-Point of Gaia Early Data Release 3 from LAMOST Primary Red Clump Stars
• Gaia EDR3 Parallax Zero-point Offset based on W Ursae Majoris-type Eclipsing Binaries
• The influence of metallicity on the Leavitt Law from geometrical distances of Milky Way and Magellanic Clouds Cepheids
• Classical Cepheid period-Wesenheit-metallicity relation in the Gaia bands
• An updated metal-dependent theoretical scenario for Classical Cepheids
• Cepheid Metallicity in the Leavitt Law (C-MetaLL) survey: I. HARPS-N@TNG spectroscopy of 47 Classical Cepheid and 1 BL Her variables
• RR Lyrae variables in Messier 53: Near-infrared Period--Luminosity relations and the calibration using Gaia Early Data Release 3
• On the Period--Luminosity--Metallicity relation of Classical Cepheids
• Metallicities from high resolution spectra of 49 RR Lyrae Variables
• Cepheid Metallicity in the Leavitt Law (C- MetaLL) survey: II.High-resolution spectroscopy of the most metal poor Galactic Cepheids
• A Maximum Likelihood Calibration of the Tip of the Red Giant Branch Luminosity from High Latitude Field Giants using Gaia Early Data Release 3 Parallaxes
• A spatially dependent correction of Gaia EDR3 parallax zero-point offset based on 0.3 million LAMOST DR8 giant stars

Cited by in corpus (10)

• Investigating Gaia EDR3 parallax systematics using asteroseismology of Cool Giant Stars observed by Kepler, K2, and TESS II. Deciphering Gaia parallax systematics using red clump stars
• Investigating Gaia EDR3 parallax systematics using asteroseismology of Cool Giant Stars observed by Kepler, K2, and TESS I. Asteroseismic distances to 12,500 red-giant stars
• Period-Luminosity Relations for Galactic classical Cepheids in the Sloan bands
• Search for Classical Cepheids in Galactic Open Clusters and Calibration of the Period Wesenheit Metallicity Relation in the Gaia Bands
• The Milky Way as Seen by Classical Cepheids I: Distances Based on Mid-infrared Photometry
• The VMC Survey -- LIV. Anomalous Cepheids in the Magellanic Clouds Period-Luminosity relations in the near-infrared bands
• Cepheid Metallicity in the Leavitt Law (C-MetaLL) survey: IX. Metallicity dependence of Period-Wesenheit relations based on a homogeneous spectroscopic sample
• The model fitting of Gaia DR3 Classical Cepheid light and radial velocity curves
• Forward-modelling Milky Way Cepheids: selection effects and physical priors in the Gaia-HST calibration
• New theoretical predictions on Type II Cepheids: towards a self consistent Pop. II distance scale