On-axis spatially resolved spectroscopy of low redshift quasar host galaxies

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dc.contributor.authorCourbin, F
dc.contributor.authorLetawe, G
dc.contributor.authorMagain, P
dc.contributor.authorWisotzki, L
dc.contributor.authorJablonka, P
dc.contributor.authorJahnke, DK
dc.contributor.authorKuhlbrodt, B
dc.contributor.authorAlloin, D
dc.contributor.authorMeylan, G
dc.contributor.authorMinniti, D
dc.contributor.authorBurud, I
dc.date.accessioned2025-01-21T01:10:22Z
dc.date.available2025-01-21T01:10:22Z
dc.date.issued2002
dc.description.abstractWe present the first result of a comprehensive spectroscopic study of quasar host galaxies. On-axis, spatially resolved spectra of low redshift quasars have been obtained with FORS1, mounted on the 8.2 m ESO Very Large Telescope, Antu. The spectra are spatially deconvolved using a spectroscopic version of the "MCS deconvolution algorithm". The algorithm decomposes two dimensional spectra into the individual spectra of the central point-like nucleus and of its host galaxy. Applied to HE 1503+0228 at z = 0.135 (M-B = -23.0), it provides us with the spectrum of the host galaxy between 3600 Angstrom and 8500 Angstrom (rest-frame), at a mean resolving power of 700. The data allow us to measure several of the important Lick indices. The stellar populations and gas ionization state of the host galaxy of HE 1503+0228 are very similar to the ones measured for normal non-AGN galaxies. Dynamical information is also available for the gas and stellar components of the galaxy. Using deconvolution and a deprojection algorithm, velocity curves are derived for emission lines, from the center up to 400 away from the nucleus of the galaxy. Fitting a simple three-components mass model (point mass, spherical halo of dark matter, disk) to the position-velocity diagram, we infer a mass of M(r < 1 kpc) = (2.0 +/- 0.3) x 10(10) M-. within the central kiloparsec of the galaxy, and a mass integrated over 10 kpc of M(r < 10 kpc) = (1.9 +/- 0.3) x 10(11) M-., with an additional 10% error due to the uncertainty on the inclination of the galaxy. This, in combination with the analysis of the stellar populations indicates that the host galaxy of HE 1503+0228 is a normal spiral galaxy.
dc.fuente.origenWOS
dc.identifier.doi10.1051/0004-6361:20021246
dc.identifier.eissn1432-0746
dc.identifier.issn0004-6361
dc.identifier.urihttps://doi.org/10.1051/0004-6361:20021246
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/96677
dc.identifier.wosidWOS:000178885000014
dc.issue.numero3
dc.language.isoen
dc.pagina.final872
dc.pagina.inicio863
dc.revistaAstronomy & astrophysics
dc.rightsacceso restringido
dc.subjectgalaxies : kinematics and dynamics
dc.subjectgalaxies : stellar content
dc.subjectquasars : individual : HE 1503+0228
dc.subjecttechniques : image processing
dc.titleOn-axis spatially resolved spectroscopy of low redshift quasar host galaxies
dc.typeartículo
dc.volumen394
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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