Dark matter: A phenomenological existence proof
arXiv:astro-ph/0601489
Abstract
The non-Keplerian galactic rotational curves and the gravitational lensing data strongly indicate a significant dark matter component in the universe. Moreover, these data can be combined to deduce the equation of state of dark matter. Yet, the existence of dark matter has been challenged following the tradition of critical scientific spirit. In the process, the theory of general relativity itself has been questioned and various modified theories of gravitation have been proposed. Within the framework of the Einsteinian general relativity, here I make the observation that if the universe is described by a spatially flat Friedmann-Robertson-Walker cosmology with Einsteinian cosmological constant then the resulting cosmology predicts a significant dark matter component in the universe. The phenomenologically motivated existence proof refrains from invoking the data on galactic rotational curves and gravitational lensing, but uses as input the age of the universe as deciphered from studies on globular clusters.
8 pages, 3 figures (Latex: iopart style). v2: several new references added (otherwise, same as v1). v3: minor typo in the caption of Fig. 1 corrected
References in corpus (14)
- Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
- Measurements of Omega and Lambda from 42 High-Redshift Supernovae
- First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Determination of Cosmological Parameters
- Type Ia Supernova Discoveries at z>1 From the Hubble Space Telescope: Evidence for Past Deceleration and Constraints on Dark Energy Evolution
- Cosmological parameters from SDSS and WMAP
- The Case for a Positive Cosmological Lambda-term
- The Supernova Legacy Survey: Measurement of Omega_M, Omega_Lambda and w from the First Year Data Set
- Cosmological Results from High-z Supernovae
- Relativistic gravitation theory for the MOND paradigm
- Detection of weak gravitational lensing distortions of distant galaxies by cosmic dark matter at large scales
- Dark matter: A spin one half fermion field with mass dimension one?
- Combining rotation curves and gravitational lensing: How to measure the equation of state of dark matter in the galactic halo
- The Study of the Pioneer Anomaly: New Data and Objectives for New Investigation
- The Standard Cosmology