2011A&A...534A..41K


Query : 2011A&A...534A..41K

2011A&A...534A..41K - Astronomy and Astrophysics, volume 534A, 41-41 (2011/10-1)

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

KRISS G.A., ARAV N., KAASTRA J.S., EBRERO J., PINTO C., BORGUET B., EDMONDS D., COSTANTINI E., STEENBRUGGE K.C., DETMERS R.G., BEHAR E., BIANCHI S., BLUSTIN A.J., BRANDUARDI-RAYMONT G., CAPPI M., MEHDIPOUR M., PETRUCCI P. and PONTI G.

Abstract (from CDS):

We present medium-resolution (λ/Δλ∼20000) ultraviolet spectra covering the 1155-1760Å spectral range of the Seyfert 1 galaxy Mrk 509obtained using the Cosmic Origins Spectrograph (COS) on the Hubble Space Telescope (HST). Our observations were obtained simultaneously with a Low Energy Transmission Grating Spectrometer observation using the Chandra X-ray Observatory, and they are part of a multiwavelength campaign in September through December 2009 which also included observations with XMM-Newton, Swift, and INTEGRAL. Our spectra are the highest signal-to-noise observations to date of the intrinsic absorption components seen in numerous prior ultraviolet observations. To take advantage of the high S/N, we describe special calibrations for wavelength, flat-field and line-spread function corrections that we applied to the COS data. We detect additional complexity in the absorption troughs compared to prior observations made with the Space Telescope Imaging Spectrograph (STIS) on HST. We attribute the UV absorption to a variety of sources in Mrk 509, including an outflow from the active nucleus, the interstellar medium and halo of the host galaxy, and possible infalling clouds or stripped gaseous material from a merger that are illuminated by the ionizing radiation of the active nucleus. Variability between the STIS and COS observation of the most blue-shifted component (#1) allows us to set an upper limit on its distance of <250pc. Similarly, variability of component 6 between FUSE observations limits its distance to <1.5kpc. The absorption lines in all components only partially cover the emission from the active nucleus with covering fractions that are lower than those seen in the prior STIS observations and are comparable to those seen in spectra from the Far Ultraviolet Spectroscopic Explorer (FUSE). Given the larger apertures of COS and FUSE compared to STIS, we favor scattered light from an extended region near the active nucleus as the explanation for the partial covering. As observed in prior X-ray and UV spectra, the UV absorption has velocities comparable to the X-ray absorption, but the bulk of the ultraviolet absorption is in a lower ionization state with lower 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.

Abstract Copyright:

Journal keyword(s): galaxies: active - galaxies: individual: Mrk 509 - quasars: absorption lines - galaxies: Seyfert - ultraviolet: galaxies - X-rays: galaxies

Simbad objects: 7

goto Full paper

goto View the references in ADS

Number of rows : 7
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 M 77 GiP 02 42 40.771 -00 00 47.84 9.70 9.61 8.87 10.1 9.9 ~ 4236 2
2 NGC 3783 Sy1 11 39 01.7095761008 -37 44 19.008597647   12.46 13.43 11.33 12.1 ~ 1516 0
3 NGC 4151 Sy1 12 10 32.5771747733 +39 24 21.057727323   12.18 11.48     ~ 3474 2
4 Mrk 279 Sy1 13 53 03.4356451470 +69 18 29.410672989   15.15 14.46     ~ 711 0
5 NGC 5548 Sy1 14 17 59.5401093128 +25 08 12.600227883   14.35 13.73     ~ 2480 0
6 NAME HVC Complex C HVC 16 34.8 +63 07           ~ 230 1
7 Mrk 509 Sy1 20 44 09.7504131334 -10 43 24.724854084   13.35 13.12 10.7   ~ 1164 0

To bookmark this query, right click on this link: simbad:objects in 2011A&A...534A..41K and select 'bookmark this link' or equivalent in the popup menu


2021.09.19-03:35:37

© Université de Strasbourg/CNRS

    • Contact