| Title | Centripetal acceleration within the subparsec nuclear maser disk of NGC4258. |
| Authors | Greenhill, L. J.; Henkel, C.; Becker, R.; Wilson, T. L.; Wouterloot, J. G. A. |
| Bibcode | 1995A&A...304...21G Search ADS ↗ |
| Abstract | From our monitoring of the H_2_O megamaser spectrum of NGC4258 (M106) during 1984-1986 and 1993-1994, we measure a mean linear drift of 9.5+/-1.1km/s/yr, using an automated analysis, in the velocities of 12 spectral features distributed throughout the `low-velocity' complex, |V-V_o_|<150km/s, where the systemic velocity is V_o_. Features in the high-velocity complexes (|V-V_o_|>700km/s) drifted by less than ~1km/s/yr ... |
| Objects | 45 Objects Search NED ↙ |
