Proposed FOSSIL Space Mission Design Aims for High-Precision CMB Spectral Distortion Measurements
What Was Observed (Empirical Data)
No empirical astronomical observations or physical detections were made in this study, which presents a conceptual design for a proposed space observatory. The FOSSIL instrument concept is designed with 130 spectral channels spanning 50 GHz to 2 THz to measure chemical-potential (mu) and Compton (y and relativistic y) CMB spectral distortions. The proposal outlines an architecture aimed at achieving monopole sensitivity approximately three orders of magnitude superior to the legacy COBE/FIRAS instrument.
The Reality Check (Anti-Hype Analysis)
This publication outlines an unselected mission proposal rather than an approved or funded project, meaning no evidence regarding dark matter, inflation, or primordial black holes has been detected. Achieving the modeled three-order-of-magnitude sensitivity leap will require overcoming immense technical hurdles, including unprecedented systematic error control and complex foreground separation from Galactic dust. Any potential cosmological constraints remain entirely theoretical until such an instrument is constructed, launched, and validated with real observational data.
PRIMARY SOURCE:
arXiv Astrophysics (astro-ph)