English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We present medium resolution (R~20,000) HST/COS ultraviolet spectra covering1155-1760 A of the Seyfert 1 Mrk 509 obtained simultaneously with aChandra/LETGS spectrum as part of a multiwavelength campaign in 2009 thatincluded observations with XMM-Newton, SWIFT, and Integral. Our high S/Nspectrum detects additional complexity in the absorption troughs from a varietyof sources in Mrk 509, including the outflow from the active nucleus, the ISMand halo of the host galaxy, and infalling clouds or stripped gas from a mergerthat are illuminated by the AGN. Variability between the STIS and COSobservation of the -400 km/s component allows us to set an upper limit on itsdistance of < 250 pc. Similarly, variability of a component at +150 km/sbetween two prior FUSE observations limits its distance to < 1.5 kpc. The UVabsorption only partially covers the emission from the AGN nucleus. Coveringfractions are lower than those previously seen with STIS, and are comparable tothose seen with FUSE. Given the larger apertures of COS and FUSE compared toSTIS, we favor scattered light from an extended region near the AGN as theexplanation for the partial covering. As observed in prior X-ray and UVspectra, the UV absorption has velocities comparable to the X-ray absorption,but the bulk of the ultraviolet absorption is in a lower ionization state withlower total column density than the gas responsible for the X-ray absorption.We conclude that the outflow from the active nucleus is a multiphase wind.

Multiwavelength campaign on Mrk 509. VI. HST/COS observations of the far-ultraviolet spectrum