R. Observatory

He II λ4686 EMISSION FROM THE MASSIVE BINARY SYSTEM IN η CAR: CONSTRAINTS TO THE ORBITAL ELEMENTS AND THE NATURE OF THE PERIODIC MINIMA

Western Michigan University, Astrophysics, Canada., 2016, The Astrophysical Journal.

The nuclear regions of NGC 7582 from [Ne II] spectroscopy at 12.8 μm - an estimate of the black hole mass

M. Lacy, M. Wold, H. Kaeufl, 2006, astro-ph/0608461.