Pulsars, transients and relativistic astrophysics

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Local Three-dimensional Simulations of an Accretion Disk Hydromagnetic Dynamo

The Astrophysical Journal American Astronomical Society 464 (1996) 690

Authors:

John F Hawley, Charles F Gammie, Steven A Balbus
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Three-dimensional Magnetohydrodynamical Simulations of Vertically Stratified Accretion Disks

The Astrophysical Journal American Astronomical Society 463 (1996) 656

Authors:

James M Stone, John F Hawley, Charles F Gammie, Steven A Balbus
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The chemical composition towards the Galactic anti-centre. I. Observations and model atmosphere analyses

Astronomy and Astrophysics Supplement Series EDP Sciences 116:3 (1996) 483-494

Authors:

SJ Smartt, PL Dufton, WRJ Rolleston
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A new deep infrared finder chart for the Cygnus X-3 field

Astronomy and Astrophysics 308:2 (1996) 497-498

Authors:

RP Fender, SJ Bell Burnell

Abstract:

We present a new deep K-band infrared finder chart for the Cygnus X-3 field, revealing the presence of at least ten previously undetected infrared objects within a few arc seconds of the source. Although these newly-discovered objects have in all likelihood not affected previous infrared spectroscopy or photometry of Cyg X-3, knowledge of their locations is an important consideration for future deep infrared spectroscopy of the source.

A metal deficient early B-type star near the edge of the galactic disk

Astronomy and Astrophysics 305:1 (1996) 164-170

Authors:

SJ Smartt, RL Dufton, WRJ Rolleston

Abstract:

High resolution spectra of an early B-type star associated with the H II region detected by de Geus et al. (1993) are analysed using LTE model atmosphere techniques to derive stellar atmospheric parameters and a chemical composition. A distance to the star of 8.2 kpc is estimated, placing it near the edge of the galactic disk and closer than the kinematic distance of 20 kpc to the H II region, calculated by de Geus et al. A differential line by line abundance analysis with respect to the spectroscopic standard τ Sco indicates a significant metal depletion, with elements down on average by -0.5 dex.