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Simulations of thermally broadened HI Lya absorption arising in the warm-hot intergalactic medium
P. Richter, T. Fang, G. L. Bryan
Recent far-ultraviolet (FUV) absorption line measurements of low-redshift quasars have unveiled a population of intervening broad HI Lya absorbers (BLAs) with large Doppler paramet…
Low-column density gas clumps in the halo of the Milky Way
Philipp Richter, Tobias Westmeier, Christian Bruens
We report on the detection of low-column density neutral hydrogen clumps in the halo of the Milky Way. Using high-resolution (FWHM~7 km/s) optical spectra obtained with the VLT/UVE…
Tracing baryons in the warm-hot intergalactic medium with broad Ly alpha absorption
Philipp Richter, Blair Savage, Ken Sembach +1
We discuss physical properties and baryonic content of broad Ly alpha absorbers (BLAs) at low redshift. These absorption systems, recently discovered in high-resolution, high-signa…
The sub-DLA toward HE0001-2340: galaxy formation at z=2
P. Richter, C. Ledoux, P. Petitjean +1
We present a detailed analysis of chemical abundances in a sub-damped Ly alpha absorber (sub-DLA) at z=2.187 towards the quasar HE0001-2340 (z_em=2.28) using VLT/UVES data. This su…