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gr-qc2026
Causal Gravitational-Wave Production Does Not Generate Infrared Adiabatic Curvature
Ruth Durrer, Alessandro Melchiorri
Short tensor modes can generate a white noise contribution to the local scalar , but this does not induce an infrared-enhanced adiabatic curvature spectrum. For a c…
astro-ph.GA2026
The Rotation Curve of the Milky Way: State of the Art, the Keplerian Decline Debate, and Implications for Dark Matter
Alessandro Melchiorri, Ruchika
For four decades, the roughly flat rotation curve (RC) of the Milky Way (MW) stood as local evidence for an extended dark matter (DM) halo. \textit{Gaia} DR3 has changed the pictur…
astro-ph.CO2026
Present Day Cosmic Acceleration from SDSS and DESI BAO: A Call for Finer Tomography of the DESI Bright Galaxy Survey
Anna Chiara Ferri, Ruchika, Alessandro Melchiorri
The DESI collaboration's Data Release~2 (DR2) provides baryon acoustic oscillation (BAO) measurements from over 14 million galaxies and quasars, and a joint analysis of DESI BAO, C…