3 papers
astro-ph.EP2026
A targeted, parallax-based search for Planet Nine
Hector Socas-Navarro, Ignacio Trujillo
The hypothesized Planet Nine is thought to reside in the distant outer solar system, potentially explaining various anomalies in the orbits of extreme trans-Neptunian objects (ETNO…
astro-ph.HE2025
Arecibo Wow! II: Revised Properties of the Wow! Signal from Archival Ohio SETI Data
Abel Méndez, Kevin N. Ortiz Ceballos, Jorge I. Zuluaga +8
The Wow! Signal, detected in 1977 by the Ohio State University SETI project, remains one of the most intriguing unexplained radio transients. The most recent significant revision o…
astro-ph.SR2024
Observations of umbral flashes in the resonant sunspot chromosphere
T. Felipe, S. J. González Manrique, D. MartÃnez-Gómez +4
In sunspot umbrae, the core of some chromospheric lines exhibits periodic brightness enhancements known as umbral flashes. The consensus is that they are produced by the upward pro…