Near‐Infrared Adaptive Optics Imaging of High‐Redshift Quasars

Falomo, R.; Treves, A.; Kotilainen, Jari; Scarpa, Riccardo; Uslenghi, M.

doi:10.1086/524839

Cited by 30 publications

(56 citation statements)

References 64 publications

(92 reference statements)

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“…At high redshift, the host galaxies appear to be consistent with elliptical morphologies Hyvönen et al 2007;Falomo et al 2004;Kotilainen et al 2007;Falomo et al 2008;Ammons et al 2009), despite the difficulties in constraining the types unambiguously. The merger fraction is <30%, not significantly different from field galaxies.…”

Section: Comparisons With Host Galaxy Morphology Studiesmentioning

confidence: 88%

COSMIC EVOLUTION OF STAR FORMATION IN TYPE-1 QUASAR HOSTS SINCEz= 1

Shi

Rieke

Ogle

et al. 2009

ApJ

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We present Spitzer Infrared Spectrograph observations of a complete sample of 57 Sloan Digital Sky Survey type-1 quasars at z ∼ 1. Aromatic features at 6.2 and/or 7.7 μm are detected in about half of the sample and show profiles similar to those seen in normal galaxies at both low and high redshift, indicating a star formation origin for the features. Based on the ratio of aromatic to star formation infrared (SFIR) luminosities for normal star-forming galaxies at z ∼ 1, we have constructed the SFIR luminosity function (LF) of z ∼ 1 quasars. As we found earlier for low-redshift Palomar-Green (PG) quasars, these z ∼ 1 quasars show a flatter SFIR LF than do z ∼ 1 field galaxies, implying the quasar host galaxy population has on average a higher star formation rate (SFR) than the field galaxies do. As measured from their SFIR LF, individual quasar hosts have on average LIRG-level SFRs, which mainly arise in the circumnuclear regions. By comparing with similar measurements of low-redshift PG quasars, we find that the comoving SFIR luminosity density in quasar hosts shows a much larger increase with redshift than that in field galaxies. The behavior is consistent with pure density evolution since the average SFR and the average SFR/BH accretion rate in quasar hosts show little evolution with redshift. For individual quasars, we have found a correlation between the aromatic-based SFR and the luminosity of the nuclear radiation, consistent with predictions of some theoretical models. We propose that type-1 quasars reside in a distinct galaxy population that shows elliptical morphology but that harbors a significant fraction of intermediate-age stars and is experiencing intense circumnuclear star formation.

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Section: Comparisons With Host Galaxy Morphology Studiesmentioning

confidence: 88%

COSMIC EVOLUTION OF STAR FORMATION IN TYPE-1 QUASAR HOSTS SINCEz= 1

Shi

Rieke

Ogle

et al. 2009

ApJ

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“…They follow closely the correlation found between MBH and the host galaxy luminosity. Figure 10 plots the absolute R-band magnitudes of the quasar hosts versus those of their nuclei, as well as the Rband magnitudes as a function of redshift, for the AO sample as well as other quasars compiled by Kotilainen et al (2007) and Falomo et al (2008). In both plots, the four systems with robust host luminosities occupy the loci found for radio quiet quasars.…”

Section: Quasar Host Galaxies In the Ao Samplementioning

confidence: 97%

“…Davies et al (2010) stated that the PSF is generally matched quite well by the sum of a narrow Gaussian for the core, and either a Moffat or another Gaussian for the halo. Falomo et al (2008) used a Gaussian for the core and an exponential function for the wings. Lagattuta, Auger, & Fassnacht (2010), mentioned above, used three Gaussians: one component represents the diffraction-limited core, another represents the seeing-limited diffuse PSF, and the third encodes structure in the PSF.…”

Section: Modelling With An Analytical Psfmentioning

confidence: 99%

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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“…Similar studies of nearby quasars are abundant enough to permit a statistical analysis of the M BH -M bulge , M BH -σ, and M BH -L scaling relations in samples compiled from the literature (Gültekin et al 2009;Graham et al 2011;McConnell & Ma 2013). The challenge of resolving quasar host galaxies can be overcome at z < 0.5 with deep ground-based imaging (Kotilainen et al 2013; see also Márquez et al 2001), at z ≈ 1 and z ≈ 2 with Hubble Space Telescope imaging (Floyd et al 2013), and at z ≈ 2−3 with adaptive optics (Falomo et al 2008;Wang et al 2013b). Targeting gravitationally lensed quasars is a particularly effective method for obtaining host galaxy properties at high redshift, up to z = 4.5 (Peng et al 2006a,b).…”

Section: Introductionmentioning

confidence: 99%

A glance at the host galaxy of high-redshift quasars using strong damped Lyman-αsystems as coronagraphs

Finley

Petitjean

Pâris

et al. 2013

A&A

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We searched quasar spectra from the SDSS-III Baryon Oscillation Spectroscopic Survey (BOSS) for the rare occurrences where a strong damped Lyman-α absorber (DLA) blocks the Broad Line Region emission from the quasar and acts as a natural coronagraph to reveal narrow Lyα emission from the host galaxy. We define a statistical sample of 31 DLAs in Data Release 9 (DR9) with log N(H i) ≥ 21.3 cm −2 located at less than 1500 km s −1 from the quasar redshift. In 25% (8) of these DLAs, a strong narrow Lyα emission line is observed with flux ∼25 × 10 −17 erg s −1 cm −2 on average. For DLAs without this feature in their troughs, the average 3-σ upper limit is <0.8 × 10 −17 erg s −1 cm −2 . Our statistical sample is nearly 2.5 times larger than the anticipated number of intervening DLAs in DR9 within 1 500 km s −1 of the quasar redshift. We also define a sample of 26 DLAs from DR9 and DR10 with narrow Lyα emission detected and no limit on the H i column density to better characterize properties of the host galaxy emission. Analyzing the statistical sample, we do not find substantial differences in the kinematics, metals, or reddening for the two populations with and without emission detected. The highly symmetric narrow Lyα emission line profile centered in the HI trough indicates that the emitting region is separate from the absorber. The luminosity of the narrow Lyα emission peaks is intermediate between that of Lyα emitters and radio galaxies, implying that the Lyα emission is predominantly due to ionizing radiation from the AGN. Galaxies neighboring the quasar host are likely responsible for the majority (>75%) of these DLAs, with only a minority (<25%) arising from H i clouds located in the AGN host galaxy.

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Near‐Infrared Adaptive Optics Imaging of High‐Redshift Quasars

Cited by 30 publications

References 64 publications

COSMIC EVOLUTION OF STAR FORMATION IN TYPE-1 QUASAR HOSTS SINCEz= 1

COSMIC EVOLUTION OF STAR FORMATION IN TYPE-1 QUASAR HOSTS SINCEz= 1

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

A glance at the host galaxy of high-redshift quasars using strong damped Lyman-αsystems as coronagraphs

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