367 citations · 1.7k across the 16 of their papers we have counts for
16 papers
Outflows in super-Eddington quasars drive clumpy circumgalactic medium and extended H nebulae at
Lucas Tortora, Tiago Costa, Debora Sijacki +1
The discovery of gargantuan black holes with masses exceeding a billion solar masses at suggests rapid black hole growth and significant energy input into their host ga…
The host dark matter haloes of the first quasars
Tiago Costa
If quasars reside in rare, massive haloes, CDM cosmology predicts they should be surrounded by an anomalously high number of bright companion galaxies. Here I show that…
The growth of the gargantuan black holes powering high-redshift quasars and their impact on the formation of early galaxies and protoclusters
Jake S. Bennett, Debora Sijacki, Tiago Costa +2
High-redshift quasars (), powered by black holes (BHs) with large inferred masses, imply rapid BH growth in the early Universe. The most extreme examples have inferred m…
AGN-driven outflows and the formation of Ly nebulae around high-z quasars
Tiago Costa, Fabrizio Arrigoni Battaia, Emanuele P. Farina +3
The detection of Ly nebulae around quasars provides evidence for extended gas reservoirs around the first rapidly growing supermassive black holes. Observations of…
Powering galactic super-winds with small-scale AGN winds
Tiago Costa, Rüdiger Pakmor, Volker Springel
We present a new implementation for active galactic nucleus (AGN) feedback through small-scale, ultra-fast winds in the moving-mesh hydrodynamic code AREPO. The wind is injected by…
The REQUIEM Survey I: A Search for Extended Ly-Alpha Nebular Emission Around 31 z>5.7 Quasars
Emanuele Paolo Farina, Fabrizio Arrigoni-Battaia, Tiago Costa +19
The discovery of quasars few hundred megayears after the Big Bang represents a major challenge to our understanding of black holes and galaxy formation and evolution. Their luminos…
The hidden satellites of massive galaxies and quasars at high-redshift
Tiago Costa, Joakim Rosdahl, Taysun Kimm
Using cosmological, radiation-hydrodynamic simulations targeting a rare halo at , we show that the number counts and inter…
Cold Molecular Outflows in the Local Universe
A. Fluetsch, R. Maiolino, S. Carniani +7
We study molecular outflows in a sample of 45 local galaxies, both star forming and AGN, primarily by using CO data from the ALMA archive and from the literature. For a subsample w…
AGN outflows and feedback twenty years on
C. M. Harrison, T. Costa, C. N. Tadhunter +4
It is the twentieth anniversary of the publication of the seminal papers by Magorrian et al. and Silk & Rees which, along with other related work, ignited an explosion of publicati…
The 500 ks Chandra observation of the z = 6.31 QSO SDSS J1030+0524
R. Nanni, R. Gilli, C. Vignali +23
We present the results from a ks Chandra observation of the QSO SDSS J1030+0524. This is the deepest X-ray observation to date of a QSO. The QSO is dete…
Quenching star formation with quasar outflows launched by trapped IR radiation
Tiago Costa, Joakim Rosdahl, Debora Sijacki +1
We present cosmological radiation-hydrodynamic simulations, performed with the code Ramses-RT, of radiatively-driven outflows in a massive quasar host halo at . Our simulati…
Jekyll & Hyde: quiescence and extreme obscuration in a pair of massive galaxies 1.5 Gyr after the Big Bang
Corentin Schreiber, Ivo Labbé, Karl Glazebrook +12
We obtained ALMA spectroscopy and imaging to investigate the origin of the unexpected sub-mm emission toward the most distant quiescent galaxy known to date, ZF-COSMOS-20115 at z=3…
Driving gas shells with radiation pressure on dust in radiation-hydrodynamic simulations
Tiago Costa, Joakim Rosdahl, Debora Sijacki +1
We present radiation-hydrodynamic simulations of radiatively-driven gas shells launched by bright active galactic nuclei (AGN) in isolated dark matter haloes. Our goals are (1) to…
Fast cold gas in hot AGN outflows
Tiago Costa, Debora Sijacki, Martin G. Haehnelt
Observations of the emission from spatially extended cold gas around bright high-redshift QSOs reveal surprisingly large velocity widths exceeding 2000 km s^(-1), out to projected…
Feedback from Active Galactic Nuclei: Energy- versus momentum-driving
Tiago Costa, Debora Sijacki, Martin G. Haehnelt
We employ hydrodynamical simulations using the moving-mesh code AREPO to investigate the role of energy and momentum input from Active Galactic Nuclei (AGN) in driving large-scale…
The environment of bright QSOs at z ~ 6: Star forming galaxies and X-ray emission
Tiago Costa, Debora Sijacki, Michele Trenti +1
We employ cosmological hydrodynamical simulations to investigate models in which the supermassive black holes (BHs) powering luminous z ~ 6 QSOs grow from massive seeds. We simulat…