activity
19952009
most citedSupermassive black hole formation during the assembly of pre-galactic discs

490 citations · 5.3k across the 84 of their papers we have counts for

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Showing 1998Show all

7 papers · 1 filter

astro-ph1998

Lyman Break Galaxies at z~3 and Beyond

C. C. Steidel, K. L. Adelberger, M. Dickinson +2

We report on the status of large surveys of photometrically selected star forming galaxies at z~3 and z~4, with particular emphasis on both the advantages and the limitations of se…

astro-ph1998

Intrinsic Size and Shape of Sgr A*: 3.6 AU by <1 AU

K. Y. Lo, Z. -Q. Shen, J. -H. Zhao +1

By means of near-simultaneous multi-wavelength VLBA measurements, we determine for the first time the intrinsic size of Sgr A* to be 3.6 AU by <1 AU with the major axis oriented es…

astro-ph1998

Peculiar Motions and the Galaxy Density Field

C. Marinoni, G. Giuricin, B. Costantini +1

We use an all--sky, complete sample of nearby galaxies, extracted from the LEDA data base, to map the optical galaxy density field in the nearby universe. In order to determine thi…

astro-ph1998

EUVE-RXTE simultaneous observations of NGC 4051: variability and spectrum

I. Cagnoni, A. Fruscione, I. M. McHardy +1

We present timing and spectral analysis of the data collected by the Extreme Ultraviolet Explorer Satellite (EUVE) for the Seyfert 1 galaxy NGC 4051 during 1996. NGC 4051 was obser…

astro-ph1998

Signatures of Resonant Absoprtion in X-ray Spectra of Type 1 AGN

F. Nicastro, F. Fiore, G. Matt

We present photoionization models accounting for both photoelectric and resonant absorption. We demonstrate that resonance absorption lines are detectable even in moderate resoluti…

hep-ph1998

On the evolution of abelian-Higgs string networks

J. N. Moore, E. P. S. Shellard

We study the evolution of abelian-Higgs string networks in numerical simulations. These are compared against a modified velocity-dependent one scale model for cosmic string network…