3 papers
astro-ph.SR2026
An Empirical Effective-Temperature Calibrations for Galactic B/A Supergiants
N. L. Vaidman, A. S. Miroshnichenko, Sh. T. Nurmakhametova +9
We present empirical effective temperature Teff calibrations for Galactic supergiants of spectral types B5-A5 based on optical spectra. The relationships were derived from a refere…
astro-ph.SR2025
Dynamical Masses and Radiative Transfer Modeling of HD 698: a Be Binary in Evolutionary Transition
Ilfa A. Gabitova, Alex C. Carciofi, Tajan H. de Amorim +13
We present a detailed analysis of the early post-mass-transfer binary HD 698 (V742 Cas) combining high-resolution optical spectroscopy, long-baseline interferometry, and radiative-…
astro-ph.SR2025
Hot donors in cataclysmic variables: The case of EI Psc
J. Kára, S. Zharikov, M. Wolf +4
Context: We present results of time-resolved optical spectroscopy and photometry of the short-orbital period dwarf nova EI Psc. Aims: This study aims to determine fundamental syste…