Ultra Long Period Cepheids as standard candles from Gaia to Rubin-LSST

Abstract

An analysis of the Ultra Long Period Cepheids (ULPs) properties could significantly contribute to understanding the Hubble constant tension, e.g. the current discrepancy between determinations based on local distance indicators and those relying on cosmic microwave background measurements. These highly luminous variables are observable beyond 100 Mpc, so if they were confirmed to behave as standard candles, they would allow us a direct measurement of cosmological distances without any secondary distance indicator, thus reducing potential systematic errors in the calibration of the cosmic distance scale. This paper presents an analysis of the largest known sample of 73 ULPs, including 15 objects in nearby galaxies, with new accurate and homogeneous photometry obtained by Gaia DR3, and a new object, in our Galaxy, identified as Long Period Variable in Gaia DR3, but recently reclassified as ULP. The obtained results suggest that, by improving photometric accuracy, the ULP Period-Wesenheit relation shows a smaller dispersion than that obtained in literature and is in better agreement with the Classical Cepheid (CC) one, supporting the hypothesis that ULPs are the extension of the CCs at higher period, mass and luminosity. However, to reach this aim, it is necessary to enrich the sample with high-quality data. The Rubin-LSST survey offers the possibility to achieve this thanks to its photometric characteristics and time extension. In particular, we will explore the capabilities of the Rubin-LSST survey to recover ULP theoretical light-curves by using a new tool called PulsationStarRecovery, built by our group for this type of analysis.

arXiv commentAccepted, ApJS (Rubin Cadence Focus Issues), 17 pages, 12 figures

References in corpus (31)

• Gaia Data Release 3: Summary of the content and survey properties
• LSST: from Science Drivers to Reference Design and Anticipated Data Products
• 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
• A 2.4% Determination of the Local Value of the Hubble Constant
• Estimating distances from parallaxes. V: Geometric and photogeometric distances to 1.47 billion stars in Gaia Early Data Release 3
• A 3% Solution: Determination of the Hubble Constant with the Hubble Space Telescope and Wide Field Camera 3
• H0LiCOW XIII. A 2.4% measurement of $H_0$ from lensed quasars: $5.3\sigma$ tension between early and late-Universe probes
• An Improved Distance to NGC 4258 and its Implications for the Hubble Constant
• Periodograms for Multiband Astronomical Time Series
• Hubble Space Telescope Observations of Mira Variables in the Type Ia Supernova Host NGC 1559: An Alternative Candle to Measure the Hubble Constant
• Consistent Calibration of the Tip of the Red Giant Branch in the Large Magellanic Cloud on the Hubble Space Telescope Photometric System and a Re-determination of the Hubble Constant
• Optimization of the Observing Cadence for the Rubin Observatory Legacy Survey of Space and Time: a pioneering process of community-focused experimental design
• YBC, a stellar bolometric corrections database with variable extinction coefficients: an application to PARSEC isochrones
• Gaia DR3: Specific processing and validation of all-sky RR Lyrae and Cepheid stars -- The Cepheid sample
• A Study of Cepheids in M81 with the Large Binocular Telescope (Efficiently Calibrated with HST)
• Cepheid theoretical models and observations in HST/WFC3 filters: the effect on the Hubble constant Ho
• The Cepheid Distance to the Seyfert 1 Galaxy NGC 4151
• Optical Identification of Cepheids in 19 Host Galaxies of Type Ia Supernovae and NGC 4258 with the Hubble Space Telescope
• The Araucaria Project: The effect of blending on the Cepheid distance to NGC 300 from Advanced Camera for Surveys images
• Using Ultra Long Period Cepheids to Extend the Cosmic Distance Ladder to 100 Mpc and Beyond
• Stellar Crowding and the Science Case for Extremely Large Telescopes
• The VMC survey - XXIII. Model fitting of light and radial velocity curves of Small Magellanic Cloud classical Cepheids
• The Gaia EDR3 view of Johnson-Kron-Cousins standard stars: the curated Landolt and Stetson collections
• Gaia Data Release 3: The Gaia Andromeda Photometric Survey
• Cepheid Metallicity in the Leavitt Law (C- MetaLL) survey: II.High-resolution spectroscopy of the most metal poor Galactic Cepheids
• Ultra Long Period Cepheids: a primary standard candle out to the Hubble flow
• Cepheids in M31 - The PAndromeda Cepheid sample
• Simulating the Legacy Survey of Space and Time stellar content with TRILEGAL
• A Cepheid-Based Distance to the Seyfert Galaxy NGC 6814
• VI-Band Follow-Up Observations of Ultra-Long-Period Cepheid Candidates in M31
• New insights into the use of Ultra Long Period Cepheids as cosmological standard candles

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• The CosmoVerse White Paper: Addressing observational tensions in cosmology with systematics and fundamental physics