@misc{10481/93375, year = {2005}, url = {https://hdl.handle.net/10481/93375}, abstract = {We present an HI synthesis imaging study of NGC 864 (CIG 96), a spiral galaxy well isolated from similarly sized companions, yet presenting an intriguing asymmetry in its integral HI spectrum. The asymmetry in the HI profile is associated with a strong kinematical perturbation in the gaseous envelope of the galaxy, where at one side the decay of the rotation curve is faster than Keplerian. We detect a small (M(HI) = 5 × 106 M_⊙) galaxy with a faint optical counterpart at ~80 kpc projected distance from NGC 864. This galaxy is probably not massive enough to have caused the perturbations in NGC 864. We discuss alternatives, such as the accretion of a gaseous companion at a radial velocity lower than the maximum.}, publisher = {EDP Sciences}, title = {The large asymmetric HI envelope of the isolated galaxy NGC 864 (CIG 96)}, doi = {10.1051/0004-6361:20052743}, author = {Espada Fernández, Daniel and Bosma, A. and Verdes-Montenegro, L. and Athanassoula, E. and Leon, S. and Sulentic, J. and Yun, M. S.}, }