3 papers
astro-ph.IM2026
Building a Roadmap for Hubble science into the 2030s: Crucial UV spectroscopy of Oe stars in nearby galaxies
A. Wofford, D. Pauli, A. A. C. Sander +12
Hubble's unique COS G130M+G160M and STIS E140M UV spectral capabilities are essential for characterizing and understanding fundamental properties of main-sequence O-type emission-l…
astro-ph.SR2026
Evolution of a long-period Cataclysmic Variable from the viewpoint of the donor star: the case of SDSS J085210.48+783246.6
G. Tovmassian, D. Belloni, I. Mora Zamora +8
Cataclysmic variables were long considered to be close binaries consisting of a white dwarf and a Roche-lobe-filling, near-zero-age main-sequence (ZAMS) red or brown dwarf. Recent…
astro-ph.HE2026
Nature of 4FGL J2249.4+6229: Evidence for a redback system with a cool companion and low X-ray and -ray luminosities
A. V. Karpova, D. A. Zyuzin, S. V. Zharikov +1
We report the identification of the likely X-ray and optical counterpart to the unassociated Fermi source 4FGL J2249.4+6229. To clarify its nature, we investigate the X-ray data fr…