Comparison of Different Methods to Determine the Distance to LMC

2025/03/27 by Medina, Juan José Sánchez
#Astrophysics of Galaxies (astro-ph.GA) #FOS: Physical sciences #Instrumentation and Methods for Astrophysics (astro-ph.IM)

paper · doi:10.48550/arxiv.2503.21120

Abstract

This research paper aims to compare different methods for calculating the distance to the Large Magellanic Cloud (LMC). The distance, d_LMC, is determined using stellar parallax, variable stars (RR Lyrae and Classical Cepheids), redshift, and celestial mechanics, from which the systematic and standard errors are calculated. After analyzing each method, the final distance is obtained as d_LMC = 50.4802 ± 0.0638_std Kpc, differing by +0.5102 Kpc from the currently most accepted value of d_LMC = 49.97 Kpc (Pietrzyński, 2014). In this paper, the value of d_LMC was derived by combining the distances determined from RR Lyrae and Classical Cepheid variable stars, celestial mechanics and parallax.

Related

• The Distance to the Large Magellanic Cloud
• Determination of the LMC distance modulus from the Classical Cepheid Period-Luminosity relation
• The LMC distance modulus from Hipparcos RR Lyrae and classical Cepheid data
• The Distance to the Magellanic Clouds
• The distance modulus of the Large Magellanic Cloud based on double-mode RR Lyrae stars