
TL;DR
This paper investigates theoretical models of tachyon-based stars, revealing their properties, stability conditions, and potential for supermassive configurations, with implications for cosmological objects.
Contribution
It provides the first detailed analysis of self-gravitating tachyon stars, including their structure, stability, and maximum mass and size formulas based on tachyon mass.
Findings
Pure tachyon stars cannot exist in nature due to causality and equilibrium constraints.
Stable tachyon star cores can have masses exceeding solar masses, especially for small tachyon masses.
Maximum tachyon core mass and radius follow universal formulas depending on tachyon mass.
Abstract
We consider a self-gravitating body composed of ideal Fermi gas of tachyons at zero temperature. The Oppenheimer-Volkoff equation is solved for various central densities and various tachyon mass parameter . Although a pure tachyon star has finite mass, it cannot occur in nature because the equilibrium condition P=0 and the causality condition cannot be satisfied simultaneously. A stable configuration with tachyon content must be covered with a non-tachyon envelope. The boundary between the tachyon core and the envelope is determined by the critical pressure , which depends on the tachyon mass . The tachyon core is dominant and its mass can exceed many times the solar mass when is much smaller than the nucleon mass , while at large compared with , the main contribution to the total stellar mass is due to the envelope whose material determines the…
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Taxonomy
TopicsCosmology and Gravitation Theories · Solar and Space Plasma Dynamics · Stellar, planetary, and galactic studies
