Prof Steven Balbus FRS, FInstP: Publications

A powerful local shear instability in weakly magnetized disks. III - Long-term evolution in a shearing sheet. IV - Nonaxisymmetric perturbations

The Astrophysical Journal American Astronomical Society 400 (1992) 595

Authors:

John F Hawley, Steven A Balbus

Anomalous Viscosity in Accretion Disksa

Annals of the New York Academy of Sciences Wiley 675:1 (1992) 9-21

Authors:

JOHN F HAWLEY, STEVEN A BALBUS

Characteristic-based models for the evolution of cooling flows

The Astrophysical Journal American Astronomical Society 395 (1992) 99

Authors:

Stephen D Murray, Steven A Balbus

Is the Oort A-value a universal growth rate limit for accretion disk shear instabilities?

The Astrophysical Journal American Astronomical Society 392 (1992) 662

Authors:

Steven A Balbus, John F Hawley

Multifrequency observations of BL Lacertae in 1988

Astrophysical Journal 382:2 (1991) 508-514

Authors:

N Kawai, M Matsuoka, JN Bregman, HD Aller, MF Aller, PA Hughes, SA Balbus, TJ Balonek, KC Chambers, RES Clegg, SD Clements, RJ Leacock, AG Smith, JS Miller, M Hereld, MG Hoare, VA Hughes, GK Miley, GH Moriarty-Schieven, K Matthews, G Neugebauer, T Ohashi, PF Roche, HA Thronson, E Valtaoja, H Terasranta, JR Webb, R Goodrich, BJ Wills, D Wills

Abstract:

Simultaneous multiwavelength observations of BL Lacertae were performed on two occasions separated by 1 month in 1988 June and July, covering the radio, submillimeter, infrared, optical, ultraviolet, and X-ray wave bands. In the wide-band photon spectra, the X-ray flux lies clearly above the extension of radio-ultraviolet continuum as expected. The slope of the X-ray spectra is significantly flatter than that at optical-ultraviolet regimes, and its spectral index 0.7-1.0 corresponds to the slope at submillimeter band. Comparison with earlier observations, in fact, indicates that the X-ray flux is correlated with the submillimeter band, an not with the others, and supports the SSC model.

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