High-redshift quasar host galaxies with adaptive optics

Kuhlbrodt, B.; Örndahl, Eva; Wisotzki, L.; Jahnke, K.

doi:10.1051/0004-6361:20041305

Cited by 17 publications

(24 citation statements)

References 45 publications

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“…This was also concluded by other studies employing separately observed PSF calibrators (e.g., Kuhlbrodt et al 2005). The reason is PSF variability, both in the science targets and the separatelyobserved stars.…”

Section: Morphological Modelling Techniquesupporting

confidence: 85%

Subaru Telescope adaptive optics observations of gravitationally lensed quasars in the Sloan Digital Sky Survey

Rusu

Oguri

Minowa

et al. 2016

Mon. Not. R. Astron. Soc.

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We present the results of an imaging observation campaign conducted with the Subaru Telescope adaptive optics system (IRCS+AO188) on 28 gravitationally lensed quasars and candidates (23 doubles, 1 quad, 1 possible triple and 3 candidates) from the SDSS Quasar Lens Search. We develop a novel modelling technique that fits analytical and hybrid point spread functions (PSFs), while simultaneously measuring the relative astrometry, photometry, as well as the lens galaxy morphology. We account for systematics by simulating the observed systems using separately observed PSF stars. The measured relative astrometry is comparable with that typically achieved with the Hubble Space Telescope, even after marginalizing over the PSF uncertainty. We model for the first time the quasar host galaxies in 5 systems, without a-priory knowledge of the PSF, and show that their luminosities follow the known correlation with the mass of the supermassive black hole. For each system, we obtain mass models far more accurate than those previously published from low-resolution data, and we show that in our sample of lensing galaxies the observed light profile is more elliptical than the mass, for ellipticity 0.25. We also identify eight doubles for which the sources of external and internal shear are more reliably separated, and should therefore be prioritized in monitoring campaigns aimed at measuring time-delays in order to infer the Hubble constant.

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Section: Morphological Modelling Techniquesupporting

confidence: 85%

Subaru Telescope adaptive optics observations of gravitationally lensed quasars in the Sloan Digital Sky Survey

Rusu

Oguri

Minowa

et al. 2016

Mon. Not. R. Astron. Soc.

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“…With black hole masses in the range 7.04 < log (M BH ) < 8.94, all values from our sample are lower than the ones found by Kuhlbrodt et al (2005). However, this is sensible as we studied low to moderate luminosity quasars whereas Kuhlbrodt et al (2005) studied high luminosity quasars.…”

Section: Comparison With Previous Work and Discussioncontrasting

confidence: 56%

Quasar host galaxies in the FORS deep field

Villforth

Heidt²,

Nilsson

2008

A&A

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Context. The evolution of quasar host galaxies is still hardly studied at high redshifts (z > 2), although this is a very interesting redshift range as both the quasar activity and the star formation rate density have their peak at z ≈ 2−3. This makes it especially interesting to study properties of quasar host galaxies, such as the star formation rate or the black hole mass at this redshift. A proper classification of quasar host galaxies at high redshift would help to answer the question which role quasars play in galaxy evolution. Aims. In this paper we study different properties of quasars and their host galaxies at high redshifts up to z ≈ 3.4. We compare our results to those of other authors and discuss the correlation between galaxy evolution and quasar activity. Methods. We analysed broad-band images in eight filters (from U to K) of eight quasars in the FORS Deep Field with redshifts between z = 0.87 and z = 3.37. A fully 2-dimensional decomposition was carried out to detect and resolve the host galaxies. Using the magnitudes in different filters, we investigated the presumed galaxy type, galaxy age, star formation rate and the mass of the central black hole of the host galaxies. In addition, the masses of the central black hole for the whole sample were derived using the corresponding quasar spectra. Results. We were able to resolve the host galaxies of two out of eight quasars between z = 0.87 and z = 2.75. Additionally, two host galaxies were possibly resolved. Conclusions. The resolved low-redshift quasar (z = 0.865) was identified as a late type galaxy with a moderate star formation rate of 1.8 M /yr hosting a supermassive black hole with a mass of < ∼ 10 8 M . The resolved high redshift host galaxy (z = 2.7515) shows moderate star formation of 4.4−6.9 M /yr, for the black hole mass we found a lower limit of >10 7 M . All quasars host supermassive black hole with masses in the range ∼10 7 −10 9 M . Our findings are well consistent with those of other authors.

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“…It is worth pointing out that even with the exquisite 0B05 resolution images of the Hubble Space Telescope (HST ) in the optical, the task remains nontrivial because of the small host galaxy size and its low surface brightness, which decreases as 1 þ z ð Þ 4 . Despite technical challenges, careful observations are detecting more and more quasar hosts at high z, even from the ground, using deep imaging and adaptive optics ( Fynbo et al 2002;Lacy et al 2002;Hutchings 2003;Sánchez & González-Serrano 2003;Kuhlbrodt et al 2005).…”

Section: Introductionmentioning

confidence: 99%

Probing the Coevolution of Supermassive Black Holes and Quasar Host Galaxies

Peng¹,

Impey²,

Ho³

et al. 2006

ApJ

161

159

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At low redshift, there are fundamental correlations between the mass of supermassive black holes (M BH ) and the mass (M bulge ) and luminosity of the host galaxy bulge. We investigate the same relation at z k 1. Using virial mass estimates for 11 quasars at z k 2 to measure their black hole mass, we find that black holes at high z fall nearly on the same M BH versus R-band magnitude (M R ) relation (to $0.3 mag) as low-redshift active and inactive galaxies, without making any correction for luminosity evolution. Using a set of conservative assumptions about the host galaxy stellar population, we show that at z k 2 (10 Gyr ago), the ratio of M BH /M bulge was 3-6 times larger than today. Barring unknown systematic errors on the measurement of M BH , we also rule out scenarios in which moderately luminous quasar hosts at z k 2 were fully formed bulges that passively faded to the present epoch. On the other hand, five quasar hosts at z % 1 are consistent with the current-day M BH -M R relationship after taking into account evolution that is appropriate for E/S0 galaxies. Therefore, z % 1 host galaxies appear to fit the hypothesis that they are fully formed early-type galaxies. We also find that most quasar hosts with absolute magnitudes brighter than M R ¼ À23 cannot fade below L Ã galaxies today, regardless of their stellar population makeup, because their black hole masses are too high and they must arrive at the local M BH -M R relationship by z ¼ 0.

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High-redshift quasar host galaxies with adaptive optics

Cited by 17 publications

References 45 publications

Subaru Telescope adaptive optics observations of gravitationally lensed quasars in the Sloan Digital Sky Survey

Subaru Telescope adaptive optics observations of gravitationally lensed quasars in the Sloan Digital Sky Survey

Quasar host galaxies in the FORS deep field

Probing the Coevolution of Supermassive Black Holes and Quasar Host Galaxies

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