Multiwavelength campaign on Mrk 509

Abstract

Context. We present in this paper the results of a 270 ks Chandra HETGS observation in the context of a large multiwavelength campaign on the Seyfert galaxy Mrk 509. Aims. The HETGS spectrum allows us to study the high ionisation warm absorber and the Fe-K complex in Mrk 509. We search for variability in the spectral properties of the source with respect to previous observations in this campaign, as well as for evidence of ultra-fast outflow signatures. Methods. The Chandra HETGS X-ray spectrum of Mrk 509 was analysed using the SPEX fitting package. Results. We confirm the basic structure of the warm absorber found in the 600 ks XMM-Newton RGS observation observed three years earlier, consisting of five distinct ionisation components in a multikinematic regime. We find little or no variability in the physical properties of the different warm absorber phases with respect to previous observations in this campaign, except for component D2 which has a higher column density at the expense of component C2 at the same outflow velocity (−240 km s −1 ). Contrary to prior reports we find no −700 km s −1 outflow component. The O viii absorption line profiles show an average covering factor of 0.81 ± 0.08 for outflow velocities faster than −100 km s −1 , similar to those measured in the UV. This supports the idea of a patchy wind. The relative metal abundances in the outflow are close to proto-solar. The narrow component of the Fe Kα emission line shows no changes with respect to previous observations which confirms its origin in distant matter. The narrow line has a red wing that can be interpreted to be a weak relativistic emission line. We find no significant evidence of ultra-fast outflows in our new spectrum down to the sensitivity limit of our data.

Evidence that 50% of BALQSO Outflows Are Situated at Least 100 pc from the Central Source

“…Unfortunately, the two mechanisms invoked to explain trough variability provide very different R estimates; therefore, unless we can ascertain the underlying mechanism for trough variability, it is impossible to deduce robust constraints on R from studying trough variability. The best-studied case of AGN trough variability is from two monitoring campaigns of NGC 5548, where many simultaneous determinations of UV trough shapes, the UV broadband flux curve, and X-ray flux are available (see Kaastra et al 2014;Peterson et al 2014). For this case, the changes in the ionizing flux model yield R estimates fully consistent with the excited-state trough method , while the material crossing the line-of-sight model is inconsistent with the R derived from the excited-state trough method.…”

Stratified disc wind models for the AGN broad-line region: ultraviolet, optical, and X-ray properties

“…There are other observational examples, some of which show simultaneous UV and X-ray absorption (e.g. Reynolds 1997;Miller et al 2008;Crenshaw et al 2003;Kaspi et al 2001Kaspi et al , 2004Steenbrugge et al 2005;Ebrero et al 2013;Kaastra et al 2014). The absorbing effects of disc winds may also prove important for explaining puzzling phenomena such as changinglook quasars and the BLR anomaly in NGC 5548 (Dehghanian et al 2019).…”

Probing the Anisotropy of the Milky Way Gaseous Halo-II: Sightline toward Mrk 509

“…Since we are interested in z = 0 highly ionized metal lines we fit the continuum spectrum in the 15 − 23Å range with a powerlaw, absorbed by the Galactic column density. Mrk 509 is known to have intrinsic absorption (Kaastra et al 2014 and references there in), so we fit the intrinsic absorbers of Mrk 509 with multiple gaussians.…”

“…We also present detailed reanalysis of the Chandra High Energy Transmission Grating (HETG) 2012 observation of Mrk 509 . Kaastra et al (2014) have analyzed and modeled the intrinsic absorbers of Mrk 509 . Here we focus on the redshift zero absorption lines.…”