70 citations · 482 across the 36 of their papers we have counts for
20 papers · 1 filter
Radiation pressure powers quasar broad absorption line winds but fails to drive galaxy feedback
Braden Seefeldt-Gail, Lluís Mas-Ribas, Norman Murray
Most cosmological simulations invoke quasar-driven winds as the primary mechanism quenching star formation in massive galaxies, assuming wind momentum flux approaches the radiation…
Fast Radio Bursts probe Galaxy Evolution: Evidence and implications of a redshift-dependent FRB host DM
Lluis Mas-Ribas
The redshift evolution of ionized gas in the full galaxy-halo system is a central open question in galaxy formation, because no existing observable is simultaneously sensitive to a…
Constraining the mass of the M31 ionized baryon Halo using CHIME/FRB Catalog 2
Lordrick A. Kahinga, J. Xavier Prochaska, Sunil Simha +21
The circumgalactic medium (CGM) surrounding galaxies is believed to be a significant reservoir of baryons, yet its total mass remains poorly constrained. We present a novel approac…
Magnetic fields in galactic environments probed by Fast Radio Bursts
Ilya S. Khrykin, Nicolas Tejos, J. Xavier Prochaska +7
FRBs constitute a unique probe of various astrophysical and cosmological environments via their characteristic dispersion and rotation (RM) measures that encode information about t…
Constraining Gas Mass Fractions in Galaxy Groups and Clusters with the First CHIME/FRB Outrigger
Adam E. Lanman, Sunil Simha, Kiyoshi W. Masui +16
In recent years, localized fast radio bursts (FRBs) have emerged as a powerful tool to study the structure of the baryonic matter in the universe. Their dispersion measures (DMs) s…
A DM relation for FRB hosts?
Lluis Mas-Ribas, Clancy W. James
It has been proposed that measurements of scattering times () from fast radio bursts (FRB) may be used to infer the FRB host dispersion measure (DM) and its redshift. This appro…
CGM cloud sizes from refractive FRB scattering
Lluis Mas-Ribas, Matthew McQuinn, J. Xavier Prochaska
We explore constraints on the size of cool gas clouds in the circumgalactic medium (CGM) obtainable from the presence, or lack thereof, of refractive scattering in fast radio burst…
Probing Population III Initial Mass Functions with He II/H Intensity Mapping
Jasmine Parsons, Lluis Mas-Ribas, Guochao Sun +3
We demonstrate the potential of line-intensity mapping to place constraints on the initial mass function (IMF) of Population III stars via measurements of the mean He II 1640A/H…
Lyman- Polarization Intensity Mapping
Lluís Mas-Ribas, Tzu-Ching Chang
We present a formalism that incorporates hydrogen Lyman-alpha (Ly) polarization arising from the scattering of radiation in galaxy halos into the intensity mapping approach. Usi…
Radiation-pressure Waves and Multiphase Quasar Outflows
Lluís Mas-Ribas
We report on quasar outflow properties revealed by analyzing more than 60 composite outflow spectra built from CIV absorption troughs in the SDSS-III/BOSS DR12QBAL c…
The Ubiquitous Imprint of Radiative Acceleration in the Mean Absorption Spectrum of Quasar Outflows
Lluís Mas-Ribas, Renate Mauland
Observational evidence revealing the main mechanisms that accelerate quasar outflows has proven difficult to obtain, due to the complexity of the absorption features that this gas…
Origin of Metals around Galaxies I: Catalogs of Metal-line Absorption Doublets from High-Resolution Quasar Spectra
Lluís Mas-Ribas, Signe Riemer-Sørensen, Joseph F. Hennawi +5
We present the first paper of the series Origin of Metals around Galaxies (OMG) aimed to study the origin of the metals observed in the circumgalactic and intergalactic media. In t…
The Cosmological Bias Factor of Damped Lyman Alpha systems: Dependence on Metal Line Strength
Ignasi Pérez-Ràfols, Jordi Miralda-Escudé, Andreu Arinyo-i-Prats +2
We measure the cosmological bias factor of DLAs from their cross-correlation with the Ly forest absorption, as a function of the DLA metal strength, defined from an average of e…
Revealing the Warm and Hot Halo Baryons via Thomson Scattering of Quasar Light
Lluís Mas-Ribas, Joseph F. Hennawi
The baryonic content and physical properties of the warm and hot ( K) phases of the circumgalactic medium (CGM) are poorly constrained, owing to the la…
A metal-line strength indicator for Damped Lyman Alpha (DLA) systems at low signal-to-noise
Andreu Arinyo-i-Prats, Lluis Mas-Ribas, Jordi Miralda-Escude +2
The Baryon Oscillation Spectroscopic Survey of SDSS-III has provided an unprecedentedly large sample of Damped \lya systems (DLAs), the largest repositories of neutral hydrogen in…
Small-scale Intensity Mapping: Extended Halos as a Probe of the Ionizing Escape Fraction and Faint Galaxy Populations during Reionization
Lluís Mas-Ribas, Joseph F. Hennawi, Mark Dijkstra +3
We present a new method to quantify the value of the escape fraction of ionizing photons, and the existence of ultra-faint galaxies clustered around brighter objects during the epo…
Small-scale Intensity Mapping: Extended Ly, H and Continuum emission as a Probe of Halo Star Formation in High-redshift Galaxies
Lluís Mas-Ribas, Mark Dijkstra, Joseph F. Hennawi +3
Lyman alpha halos are observed ubiquitously around star-forming galaxies at high redshift, but their origin is still a matter of debate. We demonstrate that the emission from faint…
The Mean Metal-line Absorption Spectrum of DLAs in BOSS
Lluís Mas-Ribas, Jordi Miralda-Escudé, Ignasi Pérez-Ràfols +6
We study the mean absorption spectrum of the Damped Lyman alpha population at by stacking normalized, rest-frame shifted spectra of DLAs from the DR12 of…
Boosting Lya and HeII 1640A Line Fluxes from Pop III Galaxies: Stochastic IMF Sampling and Departures from Case-B
Lluís Mas-Ribas, Mark Dijkstra, Jaime E. Forero-Romero
We revisit calculations of nebular hydrogen Lya and HeII 1640A line strengths for population III galaxies, undergoing continuous and bursts of star formation. We focus on initial m…
On the contribution of fluorescence to Ly halos (LAHs) around star forming galaxies
Lluís Mas-Ribas, Mark Dijkstra
We quantify the contribution of Ly fluorescence to observed spatially extended Ly halos around Ly emitters (LAE) at redshift . The key physical quantities tha…