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The formation of the faintest galaxies in cosmological simulations: from the impact of primordial magnetic fields to the metal enrichment of present day dwarfs by first stars

Publications associées (324)

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Nucleosynthesis And The Inhomogeneous Chemical Evolution Of The Carina Dwarf Galaxy

Pascale Jablonka

The detailed abundances of 23 chemical elements in nine bright red giant branch stars in the Carina dwarf spheroidal galaxy are presented based on high-resolution spectra gathered at the Very Large Telescope (VLT) and Magellan telescopes. A spherical model ...

2012

GEAR: A Window on the World of Dwarf Galaxies

Pascale Jablonka, Yves Revaz

GEAR is a new fully parallel chemodynamical Tree/SPH code designed to study the formation and evolution of galaxies. GEAR treats the complex physics of baryons, such as radiative cooling and feedback, star formation, and chemical evolution. It has been ful ...

Astronomical Soc Pacific2012

A deep, wide-field study of Holmberg II with Suprime-Cam: evidence for ram pressure stripping

Pascale Jablonka

We present a deep, wide-field optical study of the M81 group dwarf galaxy Holmberg II (HoII) based on Subaru/Suprime-Cam imaging. Individual stars are resolved down to I similar to 25.2, that is, about 1.5?mag below the tip of the red giant branch (RGB). W ...

Wiley-Blackwell2012

Manganese in dwarf spheroidal galaxies

Pascale Jablonka, Pierre North

We provide manganese abundances (corrected for the effect of the hyperfine structure) for a large number of stars in the dwarf spheroidal galaxies Sculptor and Fornax, and for a smaller number in the Carina and Sextans dSph galaxies. Abundances had already ...

2012

Quantifying the faint structure of galaxies: the late-type spiral NGC 2403

Pascale Jablonka

Ground-based surveys have mapped the stellar outskirts of Local Group disc galaxies in unprecedented detail, but extending this work to other galaxies is necessary in order to overcome stochastic variations in evolutionary history and provide more stringen ...

Blackwell Publishing Ltd, Oxford2012

CMB photons shedding light on dark matter

Julien Lesgourgues, Benjamin Audren, Gaëlle Giesen

The annihilation or decay of Dark Matter (DM) particles could affect the thermal history of the universe and leave an observable signature in Cosmic Microwave Background (CMB) anisotropies. We update constraints on the annihilation rate of DM particles in ...

Iop Publishing Ltd2012

Galaxy Scale Lenses In The Rcs2. I. First Catalog Of Candidate Strong Lenses

We present the first galaxy scale lens catalog from the second Red-Sequence Cluster Survey. The catalog contains 60 lensing system candidates comprised of Luminous Red Galaxy (LRG) lenses at 0.2 less than or similar to z less than or similar to 0.5 surroun ...

2012

The haloes of bright satellite galaxies in a warm dark matter universe

Alexey Boyarsky, Oleg Ruchayskiy, Jie Wang

High-resolution N-body simulations of galactic cold dark matter haloes indicate that we should expect to find a few satellite galaxies around the Milky Way whose haloes have a maximum circular velocity in excess of 40 km s-1. Yet, with the exception of the ...

Blackwell Publishing Ltd, Oxford2012

ORIGIN: metal creation and evolution from the cosmic dawn

Alexey Boyarsky, Douglas Cameron Watson, Oleg Ruchayskiy, Simone Campana

ORIGIN is a proposal for the M3 mission call of ESA aimed at the study of metal creation from the epoch of cosmic dawn. Using high-spectral resolution in the soft X-ray band, ORIGIN will be able to identify the physical conditions of all abundant elements ...

Springer2012

Diffuse gamma-ray constraints on dark matter revisited I: the impact of subhalos

Steve Blanchet

We make a detailed analysis of the indirect diffuse gamma-ray signals from dark matter annihilation in the Galaxy. We include the prompt emission, as well as the emission from inverse Compton scattering whenever the annihilation products contain light lept ...

Iop Publishing Ltd2012