First eROSITA study of nearby M dwarfs and the rotation-activity relation in combination with TESS E. Magaudda, B. Stelzer, St. Raetz, A. Klutsch, M. Salvato and J. Wolf A&A, 661 (2022) A29 Published online: 18 May 2022 DOI: 10.1051/0004-6361/202141617