J/A+A/601/A32ivo://CDS.VizieR/J/A+A/601/A32doi:10.26093/cds/vizier.36010032CDSSredzinska J.Czerny B.Hryniewicz K.Krupa M.Kurcz A.Marziani P.,Adhikari T.P.Basak R.You B.Wang J.M.Hu C.Pych W.Bilicki M.2017-05-11T15:52:12Z2017-04-25T08:12:56ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frquasarsgalaxiesvisible-astronomyspectroscopyThe MgII emission line is visible in the optical band for intermediate redshift quasars (0.4<z<1.6) and it is thus an extremely important tool to measure the black hole mass and to understand the structure of the Broad Line Region. We aim to determine the substructure and the variability of the MgII line with the aim to identify which part of the line comes from a medium in Keplerian motion. Using the Southern African Large Telescope (SALT) with the Robert Stobie Spectrograph (RSS) we performed ten spectroscopic observations of quasar HE 0435-4312 (z=1.2231) over a period of three years (Dec 23/24, 2012 to Dec 7/8, 2015). Both the MgII line and the FeII pseudo-continuum increase with time. We clearly detect the systematic shift of the MgII line with respect to the FeII over the years, corresponding to the acceleration of 104+/-14km/s/year in the quasar rest frame. The MgII line shape is clearly non-Gaussian but single-component, and the increase in line equivalent width and line shift is not accompanied with significant evolution of the line shape. We analyse the conditions in the MgII and FeII formation region and we note that the very large difference in the covering factor and the turbulent velocity also support the conclusion that the two regions are spatially separated. The measured acceleration of the line systematic shift is too large to connect it with the orbital motion at a distance of the Broad Line Region (BLR) in this source. It may imply a precessing inner disk illuminating the BLR. Further monitoring is still needed to better constrain the variability mechanism.2017A&A...601A..32Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/601/A32CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/601/A32https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/601/A32http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/601/A32https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/601/A32https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/601/A32http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/601/A32GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/A+A/601/A32/obs08HE 0435-4312 spectrum, 09 Aug 2015recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlambdaObserved frame (Wavelength)0.1nmpos.frame;obs.fielddoubleFobsObservation fluxct/sphot.fluxdoubleFbckgBackground fluxct/sphot.fluxdoubleJ/A+A/601/A32/obs09HE 0435-4312 spectrum, 06 Oct 2015recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlambdaObserved frame (Wavelength)0.1nmpos.frame;obs.fielddoubleFobsObservation fluxct/sphot.fluxdoubleFbckgBackground fluxct/sphot.fluxdoubleJ/A+A/601/A32/obs10HE 0435-4312 spectrum, 07 Dec 2015recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlambdaObserved frame (Wavelength)0.1nmpos.frame;obs.fielddoubleFobsObservation fluxct/sphot.fluxdoubleFbckgBackground fluxct/sphot.fluxdoubleJ/A+A/601/A32/obs02HE 0435-4312 spectrum, 18 Feb 2013recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlambdaObserved frame (Wavelength)0.1nmpos.frame;obs.fielddoubleFobsObservation fluxct/sphot.fluxdoubleFbckgBackground fluxct/sphot.fluxdoubleJ/A+A/601/A32/obs03HE 0435-4312 spectrum, 20 Aug 2013recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlambdaObserved frame (Wavelength)0.1nmpos.frame;obs.fielddoubleFobsObservation fluxct/sphot.fluxdoubleFbckgBackground fluxct/sphot.fluxdoubleJ/A+A/601/A32/obs04HE 0435-4312 spectrum, 03 Feb 2014recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlambdaObserved frame (Wavelength)0.1nmpos.frame;obs.fielddoubleFobsObservation fluxct/sphot.fluxdoubleFbckgBackground fluxct/sphot.fluxdoubleJ/A+A/601/A32/obs05HE 0435-4312 spectrum, 23 Aug 2014recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlambdaObserved frame (Wavelength)0.1nmpos.frame;obs.fielddoubleFobsObservation fluxct/sphot.fluxdoubleFbckgBackground fluxct/sphot.fluxdoubleJ/A+A/601/A32/obs06HE 0435-4312 spectrum, 24 Nov 2014recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlambdaObserved frame (Wavelength)0.1nmpos.frame;obs.fielddoubleFobsObservation fluxct/sphot.fluxdoubleFbckgBackground fluxct/sphot.fluxdoubleJ/A+A/601/A32/obs07HE 0435-4312 spectrum, 09 Jan 2015recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlambdaObserved frame (Wavelength)0.1nmpos.frame;obs.fielddoubleFobsObservation fluxct/sphot.fluxdoubleFbckgBackground fluxct/sphot.fluxdoubleJ/A+A/601/A32/table1Log of spectroscopic observations with SALTrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNoObservation numbermeta.id;meta.mainintObs.DateObservation datetime.epoch;obsnullableMJDModified Julian date of observationdtime.epochfloatExpTimeExposure time(s)stime.duration;obs.exposurecharSeeingSeeingarcsecinstr.obsty.seeingcharComCommentsmeta.notecharFileNameName of the file with spectrummeta.id;meta.filecharspShow the spectrummeta.ref.urlcharJ/A+A/601/A32/he0435HE 0435-4312 broad band spectrumrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlognuRest frame (z=1.2231)log(Hz)em.freqdoublelognuLnuRest-frame luminosity {nu}L_{nu}_log(mW.m**-2)phys.luminositydoublee_lognuLnurms uncertainty on lognuLnulog(mW.m**-2)stat.errordoubleJ/A+A/601/A32/obs01HE 0435-4312 spectrum, 23 Dec 2012recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlambdaObserved frame (Wavelength)0.1nmpos.frame;obs.fielddoubleFobsObservation fluxct/sphot.fluxdoubleFbckgBackground fluxct/sphot.fluxdouble