Cepheid distances based on Gaia and VMC@VISTA observations

2020/02/24 by V. Ripepi, Ripepi, V., R. Molinaro +5
Physics and Astronomy · #Astrophysics of Galaxies (astro-ph.GA) #FOS: Physical sciences #Solar and Stellar Astrophysics (astro-ph.SR) #astro-ph.GA #astro-ph.SR

paper · pdf · doi:10.48550/arxiv.2002.10584

8 pages, 3 figures, invited talk to appear on Astronomical Society of the Pacific Conference Series "RRLyrae/Cepheid2019: Frontiers of Classical Pulsators: Theory and Observations", Cloudcroft, NM, USA October 13-18, 2019. Corrected typo

arxiv created 2020/02/28 · arxiv updated 2020/03/02

Abstract

We present new accurate Period-Luminosity (PL) and Period-Wesenheit (PW) relations in the V,J,Ks bands based on a sample of more than 4500 Cepheids in the Large Magellanic Cloud (LMC) whose photometry was obtained in the context of the VISTA Magellanic Clouds (VMC) Survey. The excellent precision of these data allows us to study the geometry of the LMC and to establish a solid baseline for extra-galactic distance scale studies. To calibrate the zero points of these PL/PW relations, we adopted Gaia Data Release 2 parallaxes for more than 2000 Milky Way Cepheids. The implications for the measurement of H₀ are briefly discussed.

Related

• The VMC Survey -- LIV. Anomalous Cepheids in the Magellanic Clouds Period-Luminosity relations in the near-infrared bands
• The VMC Survey -- L. Type II Cepheids in the Magellanic Clouds
• The Galactic Calibration of the Cepheid Period-Luminosity Relation and its Implications for the Universal Distance Scale
• Determination of the LMC distance modulus from the Classical Cepheid Period-Luminosity relation
• Period-Luminosity Relations For Magellanic Clouds Cepheids Based on OGLE-III Data: A Comparison