The radio jets and accretion disk in NGC 4261

Authors

Ann E. Wehrle
Dayton L. Jones
David L. Meier
B. Glenn Piner, Whittier CollegeFollow

Publication Title

New Astronomy Reviews

Volume

46

Publication Date

2002

Document Type

Article

First and Last Page

235

Abstract

The nearby (41 Mpc) FR-I radio galaxy NGC 4261 contains a pair of symmetric kpc-scale jets, emerging from the vicinity of a 5×10⁸ M_☉ black hole. We present new VLBA observations of NGC 4261 at 22 and 43 GHz which we combine with previous observations at 1.6 and 8.4 GHz. We find that the orientation of the radio jet axis is the same on pc and kpc scales, indicating that the spin axis of the inner accretion disk and black hole has remained unchanged for at least 10⁶ (and more likely >10⁷) years. This suggests that a single merger event may be responsible for the supply of gas in the nucleus of NGC 4261. We also use our VLBA images to probe the structure of the accretion disk on sub-parsec scales through free-free absorption of synchrotron emission from the base of symmetric radio jets.

Recommended Citation

Wehrle, A. E., Jones, D. L., Meier, D. L., & Piner, B. (2002). The radio jets and accretion disk in NGC 4261. New Astronomy Reviews, 46, 235. Retrieved from https://poetcommons.whittier.edu/phys/50