activity
19962019
most citedExact Ground State Properties of Disordered Ising-Systems

69 citations · 197 across the 7 of their papers we have counts for

collaborators

7 papers

astro-ph.GA2019★ 25 cited

Optical continuum photometric reverberation mapping of the Seyfert-1 galaxy Mrk509

F. Pozo Nuñez, N. Gianniotis, J. Blex +6

We present the results of a two year optical continuum photometric reverberation mapping campaign carried out on the nucleus of the Seyfert-1 galaxy Mrk509. Specially designed narr…

astro-ph.GA2019★ 35 cited

The first spectroscopic dust reverberation programme on active galactic nuclei: the torus in NGC 5548

H. Landt, M. J. Ward, D. Kynoch +16

We have recently initiated the first spectroscopic dust reverberation programme on active galactic nuclei (AGN) in the near-infrared. Spectroscopy enables measurement of dust prope…

astro-ph.GA2018★ 5 cited

Analyzing temporal variations of AGN emission line profiles in the context of (dusty) cloud structure formation in the broad line region

J. Esser, J. -U. Pott, H. Landt +1

The formation processes and the exact appearance of the dust torus and broad line region (BLR) of active galactic nuclei (AGN) are under debate. Theoretical studies show a possible…

astro-ph.GA2014★ 4 cited

Properties of optically selected BL Lac candidates from the SDSS

S. D. Kügler, K. Nilsson, J. Heidt +2

\textbf{Context.} Deep optical surveys open the avenue for find large numbers of BL Lac objects that are hard to identify because they lack the unique properties classifying them a…

cond-mat.dis-nn1997★ 35 cited

Modified Scaling Relation for the Random-Field Ising Model

U. Nowak, K. D. Usadel, J. Esser

We investigate the low-temperature critical behavior of the three dimensional random-field Ising ferromagnet. By a scaling analysis we find that in the limit of temperature $T \to…

cond-mat.dis-nn1996★ 69 cited

Exact Ground State Properties of Disordered Ising-Systems

J. Esser, U. Nowak, K. D. Usadel

Exact ground states are calculated with an integer optimization algorithm for two and three dimensional site-diluted Ising antiferromagnets in a field (DAFF) and random field Ising…