Concept
Galaxie satellite
Publications associées (217)
The GOGREEN survey: Internal dynamics of clusters of galaxies at redshift 0.9-1.4
Pascale Jablonka, Hung-Hsu Chan
Context. The study of galaxy cluster mass profiles (M(r)) provides constraints on the nature of dark matter and on physical processes affecting the mass distribution. The study of galaxy cluster velocity anisotropy profiles (beta (r)) informs the orbits of ...
EDP SCIENCES S A2021Origin of stellar prolate rotation in a cosmologically simulated faint dwarf galaxy
Stellar prolate rotation in dwarf galaxies is rather uncommon, with only two known galaxies in the Local Group showing such feature (Phoenix and And II). Cosmological simulations show that in massive early-type galaxies prolate rotation likely arises from ...
OXFORD UNIV PRESS2021Cold gas in the cosmic web around galaxy clusters
Damien Louis Alexandre Spérone-Longin
Galaxies live in very different types of environment. Those different environments are relics from the evolution of the Universe since the Big Bang. This network of structures observed via large scale surveys is called Cosmic Web.
Within this web, galaxies ...
EPFL2021The GOGREEN survey: dependence of galaxy properties on halo mass a z > 1 and implications for environmental quenching
Pascale Jablonka, Hung-Hsu Chan
We use photometric redshifts and statistical background subtraction to measure stellar mass functions in galaxy group-mass (4.5-8 x 10(13) M-circle dot) haloes at 1 < z < 1.5. Groups are selected from COSMOS and SXDF, based on X-ray imaging and sparse spec ...
OXFORD UNIV PRESS2021New constraints on the mass of fermionic dark matter from dwarf spheroidal galaxies
Alexey Boyarsky, Diego Blas Temino, Kyrylo Bondarenko
Dwarf spheroidal galaxies are excellent systems to probe the nature of fermionic dark matter due to their high observed dark matter phase-space density. In this work, we review, revise, and improve upon previous phase-space considerations to obtain lower b ...
OXFORD UNIV PRESS2021The formation of the Milky Way halo and its dwarf satellites: A NLTE-1D abundance analysis. V. The Sextans galaxy
We present a homogeneous set of accurate atmospheric parameters for a sample of eleven very metal-poor (-3.32
OXFORD UNIV PRESS2021The infrared-radio correlation of star-forming galaxies is strongly M-star-dependent but nearly redshift-invariant since z similar to 4
Over the past decade, several works have used the ratio between total (rest 8-1000 mu m) infrared and radio (rest 1.4 GHz) luminosity in star-forming galaxies (q(IR)), often referred to as the infrared-radio correlation (IRRC), to calibrate the radio emiss ...
2021Tightening weak lensing constraints on the ellipticity of galaxy-scale dark matter haloes
Cosmological simulations predict that galaxies are embedded into triaxial dark matter haloes, which appear approximately elliptical in projection. Weak gravitational lensing allows us to constrain these halo shapes and thereby test the nature of dark matte ...
EDP SCIENCES S A2021Constraining the primordial magnetic field with dwarf galaxy simulations
Pascale Jablonka, Yves Revaz, Mahsa Sanati
Using a set of cosmological hydro-dynamical simulations, we constrained the properties of primordial magnetic fields by studying their impact on the formation and evolution of dwarf galaxies. We performed a large set of simulations (8 dark matter only and ...
EDP SCIENCES S A2020Molecular gas and star formation activity in luminous infrared galaxies in clusters at intermediate redshifts
Pascale Jablonka, Gianluca Castignani, Mathilde Jauzac, Damien Louis Alexandre Spérone-Longin
We investigate the role of dense megaparsec-scale environments in processing molecular gas of cluster galaxies as they fall into the cluster cores. We selected a sample of similar to 20 luminous infrared galaxies (LIRGs) belonging to intermediate-redshift ...
EDP SCIENCES S A2020