Theoretical astrophysics and plasma physics at RPC

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COSMOLOGY - COLD DARK MATTER UNDER A CLOUD

NATURE 358:6382 (1992) 104-105
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FE-II EMISSION-LINES .2. EXCITATION MECHANISMS IN COOL STARS

ASTROPHYSICAL JOURNAL 384:2 (1992) 613-623

Authors:

PG JUDGE, C JORDAN, U FELDMAN
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GALACTIC ACCRETION AND ANGULAR-MOMENTUM REORIENTATION

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 255:4 (1992) 729-736

Authors:

T QUINN, J BINNEY
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WARPS

ANNUAL REVIEW OF ASTRONOMY AND ASTROPHYSICS 30 (1992) 51-74
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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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