Suzaku observation of the LINER NGC 4102
Abstract
Low ionisation nuclear emission-line region (LINER) nuclei have been claimed to be different than other active galactic nuclei (AGN) due to the presence of complex absorbing structures along the line-of-sight and/or an inefficient mode of accretion onto the supermassive black hole. However, this issue is still open. We have investigated the broad band X-ray spectrum of NGC 4102, one of the most luminous LINERs in the Swift/BAT survey. We studied a 80 ksec Suzaku spectrum of NGC 4102, together with archival Chandra and Swift/BAT observations. We also studied the optical (3.5m/TWIN at Calar Alto observatory) and near-infrared (WHT/LIRIS at Observatorio Roque los Muchachos) spectra that were taken contemporaneous to the Suzaku data. There is strong evidence that NGC 4102 is a Compton-thick AGN, as suggested by the Swift/BAT detected intrinsic continuum and the presence of a strong narrow, neutral FeKa emission line. We have also detected ionised FeXXV emission lines in the Suzaku spectrum of the source. NGC 4102 shows a variable soft excess found at a significantly higher flux state by the time of Suzaku observations when compared to Chandra observations. Finally, a complex structure of absorbers is seen with at least two absorbers apart from the Compton-thick one, derived from the X-ray spectral analysis and the optical extinction.
Keywords
Cite
@article{arxiv.1012.3080,
title = {Suzaku observation of the LINER NGC 4102},
author = {O. Gonzalez-Martin and I. Papadakis and V. Braito and J. Masegosa and I. Marquez and S. Mateos and J. A. Acosta-Pulido and M. A. Martinez and J. Ebrero and P. Esquej and P. O'Brien and J. Tueller and R. S. Warwick and M. G. Watson},
journal= {arXiv preprint arXiv:1012.3080},
year = {2015}
}
Comments
11 pages, 6 figures and 3 tables. Accepted for publication in Astronomy & Astrophysics