389 citations · 7.3k across the 156 of their papers we have counts for
13 papers · 1 filter
High-definition imaging of a filamentary connection between a close quasar pair at z=3
Davide Tornotti, Michele Fumagalli, Matteo Fossati +16
Filaments connecting halos are a long-standing prediction of cold dark matter theories. We present a detection of the cosmic web emission connecting two quasar-host galaxies at red…
Estimating the contribution of foreground halos to the FRB 180924 dispersion measure
Sunil Simha, Nicolas Tejos, J. Xavier Prochaska +6
Fast Radio Burst (FRB) dispersion measures (DMs) record the presence of ionized baryons that are otherwise invisible to other techniques enabling resolution of the matter distribut…
The density distribution of accreting cosmic filaments as shaped by Kelvin-Helmholtz instability
Ann-Christine Vossberg, Sebastiano Cantalupo, Gabriele Pezzulli
Cosmic filaments play a crucial role in galaxy evolution transporting gas from the intergalactic medium into galaxies. However, little is known about the efficiency of this process…
Stacking the Cosmic Web in Fluorescent Lyman alpha Emission with MUSE
Sofia G. Gallego, Sebastiano Cantalupo, Simon Lilly +12
Cosmological simulations suggest that most of the matter in the Universe is distributed along filaments connecting galaxies. Illuminated by the cosmic UV background (UVB), these st…
The Stacked Lyman-Alpha Emission Profile from the Circum-Galactic Medium of z~2 Quasars
Fabrizio Arrigoni Battaia, Joseph F. Hennawi, Sebastiano Cantalupo +1
In the context of the FLASHLIGHT survey, we obtained deep narrow band images of 15 quasars with GMOS on Gemini-South in an effort to measure Ly emission from circum- an…
Probing the end of reionization with the near-zones of z > 6 QSOs
Laura C. Keating, Martin G. Haehnelt, Sebastiano Cantalupo +1
QSO near-zones are an important probe of the the ionization state of the IGM at z ~ 6-7, at the end of reionization. We present here high-resolution cosmological 3D radiative trans…
AGN-driven helium reionization and the incidence of extended HeIII regions at redshift z>3
Michele Compostella, Sebastiano Cantalupo, Cristiano Porciani
We use hydrodynamic simulations post-processed with the radiative-transfer code RADAMESH to assess recent claims that the low HeII opacity observed in z>3 quasar spectra may be inc…
A cosmic web filament revealed in Lyman-alpha emission around a luminous high-redshift quasar
Sebastiano Cantalupo, Fabrizio Arrigoni-Battaia, J. Xavier Prochaska +2
Simulations of structure formation in the Universe predict that galaxies are embedded in a "cosmic web", where the majority of baryons reside as rarefied and highly ionized gas. Th…
Quasars Probing Quasars VI. Excess HI Absorption Within One Proper Mpc of z~2 Quasars
J. Xavier Prochaska, Joseph F. Hennawi, Khee-Gan Lee +9
With close pairs of quasars at different redshifts, a background quasar sightline can be used to study a foreground quasar's environment in absorption. We use a sample of 650 proje…
The imprint of inhomogeneous HeII reionization on the HI and HeII Ly-alpha forest
Michele Compostella, Sebastiano Cantalupo, Cristiano Porciani
We use a set of AMR hydrodynamic simulations post-processed with the radiative-transfer code RADAMESH to study how inhomogeneous HeII reionization affects the intergalactic medium…
Detection of dark galaxies and circum-galactic filaments fluorescently illuminated by a quasar at z=2.4
Sebastiano Cantalupo, Simon J. Lilly, Martin G. Haehnelt
A deep narrow-band survey for Ly-alpha emission carried out on the VLT-FORS2 has revealed 98 Ly-alpha candidates down to a flux limit of 4.e-18 erg/s/cm^2 in a volume of 5500 comov…
RADAMESH: Cosmological Radiative Transfer for Adaptive Mesh Refinement Simulations
Sebastiano Cantalupo, Cristiano Porciani
We present a new three-dimensional radiative transfer (RT) code, RADAMESH, based on a ray-tracing, photon-conserving and adaptive (in space and time) scheme. RADAMESH uses a novel…
Stars quenching stars: how photoionization by local sources regulates gas cooling and galaxy formation
Sebastiano Cantalupo
Current models of galaxy formation lack an efficient and physically constrained mechanism to regulate star formation (SF) in low and intermediate mass galaxies. We argue that the m…