3 papers
astro-ph.SR2026
Eppur binaria non è esclusa: Pulsations in CZ Tuc appear to be tidally excited by its veiled companion
Piotr A. Kołaczek-Szymański, Patryk Iwanek, Jim Fuller +3
Long secondary periods (LSPs), observed in about one-third of pulsating red giants, remain unexplained despite decades of study, with binarity and non-radial oscillations as the le…
astro-ph.SR2026
Eppur binaria non é esclusa: Gaia astrometry does not disfavor a binary origin for Long Secondary Periods
Patryk Iwanek, Piotr A. Kołaczek-Szymański, Dorota M. Skowron +2
We present an independent reassessment of the nearby long secondary period (LSP) stars analyzed by Shariat et al. (2026). By inspecting long-term All Sky Automated Survey (ASAS) li…
astro-ph.HE2026
HD3191, the high-mass X-ray binary that wasn't there
Gregor Rauw, Yaël Nazé, Piotr Antoni Kołaczek-Szymański
The rapidly rotating B1 IV:nn star HD3191 lies within the error box of a flaring Fermi gamma-ray source. Although the counterpart of the Fermi source is likely an active galaxy, HD…