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Using MgII to Investigate Quasars and Their Black-hole Masses

AGN Physics with the Sloan Digital Sky Survey 311 (2004) 79-79

Authors:

M Jarvis, R McLure
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GRS 1915+105: The first three months with INTEGRAL

(2004)

Authors:

DC Hannikainen, O Vilhu, J Rodriguez, NJ Westergaard, S Shaw, GG Pooley, T Belloni, AA Zdziarski, RW Hunstead, K Wu, S Brandt, A Castro-Tirado, PA Charles, AJ Dean, Ph Durouchoux, RP Fender, P Hakala, CR Kaiser, AR King, N Lund, IF Mirabel, J Poutanen
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Quenched millimetre emission from Cygnus X-1 in a soft X-ray state

(2004)

Authors:

SP Tigelaar, RP Fender, RPJ Tilanus, E Gallo, GG Poo ley
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"Soft X-ray transient" outbursts which are not soft

New Astronomy 9:4 (2004) 249-264

Authors:

C Brocksopp, RM Bandyopadhyay, RP Fender

Abstract:

We have accumulated multiwavelength (X-ray, optical, radio) lightcurves for the eight black hole X-ray binaries which have been observed to enter a supposed 'soft X-ray transient' outburst, but remained in the low/hard state throughout the outburst. Comparison of the lightcurve morphologies, spectral behaviour, properties of the quasi-periodic oscillations and the radio jet provides the first study of such objects as a sub-class of X-ray transients. However, rather than assuming that these hard state X-ray transients are different from the 'canonical' soft X-ray transient, we prefer to consider the possibility that new analysis of both soft and hard state X-ray transients in a spectral context will provide a model capable of explaining the outburst mechanisms of (almost) all black hole X-ray binaries. © 2003 Elsevier B.V. All rights reserved.
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Formation and evolution of S0 galaxies: A SAURON case study of NGC 7332

Monthly Notices of the Royal Astronomical Society 350:1 (2004) 35-46

Authors:

J Falcón-Barroso, RF Peletier, E Emsellem, H Kuntschner, K Fathi, M Bureau, R Bacon, M Cappellari, Y Copin, RL Davies, T De Zeeuw

Abstract:

We present SAURON integral-field observations of the S0 galaxy NGC 7332. Existing broadband ground-based and Hubble Space Telescope (HST) photometry reveals a double-disc structure and a boxy bulge interpreted as a bar viewed close to edge-on. The SAURON two-dimensional stellar kinematic maps confirm the existence of the bar and inner disc but also uncover the presence of a cold counter-rotating stellar component within the central 250 pc. The Hβ and [O III] emission line maps show that the ionized gas has a complex morphology and kinematics, including both a component counter-rotating with respect to the stars and a fainter corotating one. Analysis of the absorption line-strength maps show that NGC 7332 is young everywhere. The presence of a large-scale bar can explain most of those properties, but the fact that we see a significant amount of unsettled gas, together with a few peculiar features in the maps, suggests that NGC 7332 is still evolving. Interactions as well as bar-driven processes must thus have played an important role in the formation and evolution of NGC 7332, and presumably of S0 galaxies in general.
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