Estimation of mass and cosmological constant of nearby spiral galaxies using galaxy rotation curve

2013/07/07 by B. Aryal, Aryal, B., R. Pandey +7
Earth and Planetary Sciences · Physics and Astronomy · #Cosmology and Gravitation Theories #Cosmology and Nongalactic Astrophysics (astro-ph.CO) #FOS: Physical sciences #Geophysics and Gravity Measurements #Solar and Space Plasma Dynamics

paper · pdf · doi:10.48550/arxiv.1307.1824

openalex publication_date 2013/07/07 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

An expression for rotational velocity of a test particle around the central mass in the invariant plane is derived. For this, a line element of Schwarzschild de-Sitter space-time is used to study the effect of cosmological constant (Λ) on the motion of both massive and massless particles. Using rotation curve data of 15 nearby spiral and barred spiral galaxies, we estimated the mass and Λ of the galaxy. The mass of the galaxies are found to lie in the range 0.13-7.60 × 10⁴⁰ kg. The cosmological constant (Λ) is found to be negative (-0.03 to -0.10 × 10^-40 km^-2), suggesting the importance of anti-de Sitter space in the local bubble. Possible explanation of the results will be discussed.

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