%0 Generic %1 ebrero2013xrayuv %A Ebrero, J. %A Kaastra, J. S. %A Kriss, G. A. %A de Vries, C. P. %A Costantini, E. %D 2013 %K absorption uv wind x-ray %T The X-ray/UV absorber in NGC 4593 %U http://arxiv.org/abs/1308.1555 %X We present the results of a recent (March 2011) 160 ks Chandra-LETGS observation of the Seyfert galaxy NGC 4593, and the analysis of archival X-ray and UV spectra taken with XMM-Newton and HST/STIS in 2002. We find evidence of a multi-component warm absorber (WA) in the X-rays with four distinct ionisation degrees (log xi = 1.0, log xi = 1.7, log xi = 2.4, and log xi = 3.0) outflowing at several hundreds of km/s. In the UV we detect 15 kinematic components in the absorbers, blueshifted with respect to the systemic velocity of the source, ranging from -60 km/s to -1520 km/s. Although the predicted CIV and NV column densities from the low-ionisation X-ray outflow are in agreement with those measured for some components in the STIS spectrum, there are kinematic discrepancies that may prevent both the X-ray and UV absorbers from originating in the same intervening gas. We derive upper limits on the location of the absorbers finding that the high-ionisation gas lie within ~6 - 29 pc from the central ionising source, while the low-ionisation gas is located at several hundreds of pc. This is consistent with our line of sight passing through different parts of a stratified wind. The total kinetic energy of the outflows injected into the surroundings of the host galaxy only accounts for a tiny fraction of the bolometric luminosity of the source, and it is therefore unlikely that they may cause a significant impact in the interstellar medium of NGC 4593 in a given single episode of activity.

@misc{ebrero2013xrayuv, abstract = {We present the results of a recent (March 2011) 160 ks Chandra-LETGS observation of the Seyfert galaxy NGC 4593, and the analysis of archival X-ray and UV spectra taken with XMM-Newton and HST/STIS in 2002. We find evidence of a multi-component warm absorber (WA) in the X-rays with four distinct ionisation degrees (log xi = 1.0, log xi = 1.7, log xi = 2.4, and log xi = 3.0) outflowing at several hundreds of km/s. In the UV we detect 15 kinematic components in the absorbers, blueshifted with respect to the systemic velocity of the source, ranging from -60 km/s to -1520 km/s. Although the predicted CIV and NV column densities from the low-ionisation X-ray outflow are in agreement with those measured for some components in the STIS spectrum, there are kinematic discrepancies that may prevent both the X-ray and UV absorbers from originating in the same intervening gas. We derive upper limits on the location of the absorbers finding that the high-ionisation gas lie within ~6 - 29 pc from the central ionising source, while the low-ionisation gas is located at several hundreds of pc. This is consistent with our line of sight passing through different parts of a stratified wind. The total kinetic energy of the outflows injected into the surroundings of the host galaxy only accounts for a tiny fraction of the bolometric luminosity of the source, and it is therefore unlikely that they may cause a significant impact in the interstellar medium of NGC 4593 in a given single episode of activity.}, added-at = {2013-08-08T16:51:04.000+0200}, author = {Ebrero, J. and Kaastra, J. S. and Kriss, G. A. and de Vries, C. P. and Costantini, E.}, biburl = {https://www.bibsonomy.org/bibtex/28900c67e0f69e02a9f36d0b2aaa87d0f/miki}, description = {[1308.1555] The X-ray/UV absorber in NGC 4593}, interhash = {a0a56f06c3dfd29f33cf713163b5c8cc}, intrahash = {8900c67e0f69e02a9f36d0b2aaa87d0f}, keywords = {absorption uv wind x-ray}, note = {cite arxiv:1308.1555Comment: 17 pages, 11 figures, 9 tables. Accepted for publication in MNRAS}, timestamp = {2013-08-08T16:51:04.000+0200}, title = {The X-ray/UV absorber in NGC 4593}, url = {http://arxiv.org/abs/1308.1555}, year = 2013 }