A star-forming dwarf galaxy candidate in the halo of NGC 4634 Y. Stein, D. J. Bomans, P. Kamphuis, E. Jütte, M. Langener and R.-J. Dettmar A&A, 620 (2018) A29 Published online: 26 November 2018 DOI: 10.1051/0004-6361/201731304