Revealing two orthogonally polarized spectral components in Vela X-1 with IXPE Sofia V. Forsblom, Sergey S. Tsygankov, Valery F. Suleimanov, Alexander A. Mushtukov and Juri Poutanen A&A, 696 (2025) A224 Published online: 23 April 2025 DOI: 10.1051/0004-6361/202553867