A5107987164- Galaxies: Formation, Evolution, Phenomena
- Astrophysical Phenomena and Observations
- Astronomy and Astrophysical Research
- Gamma-ray bursts and supernovae
- Astrophysics and Star Formation Studies
- Astrophysics and Cosmic Phenomena
- Stellar, planetary, and galactic studies
- Astronomical Observations and Instrumentation
- Experimental Learning in Engineering
- Mobile Learning in Education
- Museums and Cultural Heritage
- Regional Development and Policy
- Spacecraft Design and Technology
- Technology Assessment and Management
- Radio, Podcasts, and Digital Media
- Space Science and Extraterrestrial Life
- Particle Detector Development and Performance
- Plant Water Relations and Carbon Dynamics
National Institute for Astrophysics
2017-2022
Institute for Space Astrophysics and Planetology
2022
Roma Tre University
2016-2020
Centre National de la Recherche Scientifique
2019-2020
Astronomical Observatory of Rome
2016-2020
Aix-Marseille Université
2019-2020
Feedback from accreting SMBHs is often identified as the main mechanism responsible for regulating star-formation in AGN host galaxies. However, relationships between activity, radiation, winds, and are complex still far being understood. We study scaling relations properties, galaxy properties winds. then evaluate wind mean impact on global history, taking into account short duty cycle with respect to that of star-formation. first collect observations 94 detected massive winds at sub-pc kpc...
The AGN bolometric correction is a key element to understand BH demographics and compute accurate accretion histories from luminosities. However, current estimates still differ each other by up factor of two three, rely on extrapolations at the lowest highest Here we revisit this fundamental issue presenting general hard X-ray ($K_{X}$) optical ($K_{O}$) corrections, computed combining several samples spanning widest (about 7 dex) luminosity range ever used for kind studies. We analysed...
ABSTRACT Code Investigating GALaxy Emission (cigale) is a powerful multiwavelength spectral energy distribution (SED) fitting code for extragalactic studies. However, the current version of cigale not able to fit X-ray data, which often provide unique insights into active galactic nucleus (AGN) intrinsic power. We develop new module cigale, allowing it SEDs from infrared (IR). also improve AGN UV-to-IR wavelengths. implement modern clumpy two-phase torus model, skirtor. To account moderately...
Models and observations suggest that both the power effects of AGN feedback should be maximised in hyper-luminous (LBol > 1047 erg s-1) quasars, i.e. objects at brightest end luminosity function. In this paper, we present first results a multiwavelength observing programme, focusing on sample WISE/SDSS selected (WISSH) broad-line quasars z ≈ 1.5–5. The WISSH project has been designed to reveal most energetic AGN-driven outflows, estimate their occurrence peak quasar activity, extend study...
We have undertaken a multi-band observing program aimed at obtaining complete census of winds in sample WISE/SDSS selected hyper-luminous (WISSH) QSOs z~2-4. analyzed the rest-frame optical (LBT/LUCI and VLT/SINFONI) UV (SDSS) spectra 18 randomly WISSH to measure SMBH mass study properties both NLR BLR traced by blueshifted/skewed [OIII] CIV emission lines, respectively. These are powered with masses $\ge$10$^9$ Msun accreting 0.4<$\lambda_{Edd}$<3.1. found existence two sub-populations...
We imaged with ALMA and ARGOS/LUCI the molecular gas dust stellar continuum in XID2028, an obscured QSO at z=1.593, where presence of a massive outflow ionized component traced by [O III]5007 emission has been resolved up to 10 kpc. This target represents unique test case study 'feedback action' peak epoch AGN-galaxy coevolution. The detected CO(5-4) transition 1.3mm continuum, ~30 ~20 {\sigma} significance respectively, both emissions confined central (<4 kpc) radius area. Our analysis...
We perform a survey of the X-ray properties 41 objects from WISE/SDSS selected Hyper-luminous (WISSH) quasars sample, composed by 86 broad-line (QSOs) with bolometric luminosity $L_{Bol}\geq 2\times 10^{47}\,erg\, s^{-1}$, at z~2-4. All but 3 QSOs show unabsorbed 2-10 keV luminosities $L_{2-10}\geq10^{45} \,erg \,s^{-1}$. Thanks to their extreme radiative output across Mid-IR-to-X-ray range, WISSH offer opportunity significantly extend and validate existing relations involving $L_{2-10}$....
Context. Studying the coupling between energy output produced by central quasar and host galaxy is fundamental to fully understand evolution. Quasar feedback indeed supposed dramatically affect properties depositing large amounts of momentum into interstellar medium (ISM).
Sources at the brightest end of QSO luminosity function during peak epoch star formation and black hole accretion (z~2-4, i.e. Cosmic noon) are privileged sites to study feeding & feedback cycle massive galaxies. We perform first systematic cold gas properties in most luminous QSOs, by characterising their host-galaxies environment. analyse ALMA, NOEMA JVLA observations FIR continuum, CO [CII] emission lines eight QSOs ($L_{\rm Bol}>3\times10^{47}$ erg/s) from WISSH sample z~2.4-4.7. report...
The masses of supermassive black holes at the centres local galaxies appear to be tightly correlated with mass and velocity dispersions their galactic hosts. However, Mbh-Mstar relation inferred from dynamically measured inactive is up an order-of-magnitude higher than some estimates active holes, recent work suggests that this discrepancy arises selection bias on sample dynamical hole measurements. In we combine X-ray measurements mean accretion luminosity as a function stellar redshift...
During the last years, Ly$\alpha$ nebulae have been routinely detected around high-z, radio-quiet quasars (RQQs) thanks to advent of sensitive integral field spectrographs. Constraining physical properties is crucial for a full understanding circum-galactic medium (CGM), which venue feeding and feedback processes. The most luminous are privileged test-beds study these processes, given their large ionizing fluxes dense CGM environments in they expected be embedded. We aim at characterizing...
Hyperluminous quasars ($L_{\rm bol}\gtrsim 10^{47}$ erg s$^{-1}$) are ideal laboratories to study the interaction and impact of extreme radiative field most powerful winds in AGN nuclear regions. They typically exhibit low coronal X-ray luminosity X}$) compared UV MIR outputs UV}$ $L_{\rm MIR}$) with a non-negligible fraction them reporting even $\sim$1 dex weaker X}$ prediction well established X}$-$L_{\rm MIR}$ relations followed by bulk population. We report our WISE/SDSS-selected (WISSH)...
The WISSH quasars project aims at studying the nuclear and host galaxy properties of most luminous ($L_{bol}>10^{47}$ erg/s, $1.8<z<4.6$). Nuclear winds are manifested as UV broad ($\geq$ 2,000 km/s) absorption lines (BAL) in $\sim$ 15\% quasars. We aim incidence such sample, to investigate possible differences with respect lower luminosity AGN regimes. collected optical spectra from SDSS data release 12, identified those showing troughs region between \siiv \civ emission lines. find a...
We present a 155ks NuSTAR observation of the $z\sim2$ hot dust-obscured galaxy (hot DOG) W1835+4355. extracted spectra from two detectors and analyzed them jointly with archival XMM PN MOS spectra. performed spectroscopic analysis based on both phenomenological physically motivated models employing toroidal spherical geometry for obscurer. In all modelings, source exhibits Compton-thick column density $N_{\rm H} \gtrsim 10^{24}$ cm$^{-2}$, 2-10 keV luminosity $L_{2-10}\approx2\times10^{45}$...
We present an ALMA high-resolution observation of the 840 um continuum and [CII] line emission in WISE-SDSS selected hyper-luminous (WISSH) QSO J1015+0020 at z~4.4. Our analysis reveals exceptional overdensity [CII]-emitting companions with a very small (<150 km/s) velocity shift respect to redshift. report discovery closest companion observed so far submillimetre observations high-z QSOs. It is only 2.2 kpc distant merging J1015+0020, while two other emitters are found 8 17 kpc. Two strong...