Properties of bow-shock sources at the Galactic center J. Sanchez-Bermudez, R. Schödel, A. Alberdi, K. Muzić, C. A. Hummel and J.-U. Pott A&A, 567 (2014) A21 Published online: 04 July 2014 DOI: 10.1051/0004-6361/201423657