112 citations · 1.8k across the 47 of their papers we have counts for
47 papers
Emergence of a new HI 21-cm absorption component at z~1.1726 towards the gamma-ray blazar PKS~2355-106
Raghunathan Srianand, Neeraj Gupta, Patrick Petitjean +12
We report the emergence of a new HI 21-cm absorption at z_abs = 1.172635 in the damped Lyman-alpha absorber (DLA) towards the gamma-ray blazar PKS 2355-106 (z_em~1.639) using scien…
Clumpiness of Observed and Simulated Cold Circumgalactic Gas
Ramona Augustin, Céline Péroux, Aleksandra Hamanowicz +3
Determining the clumpiness of matter around galaxies is pivotal to a full understanding of the spatially inhomogeneous, multi-phase gas in the circumgalactic medium (CGM). We combi…
MUSE-ALMA Halos VI: Coupling Atomic, Ionised & Molecular Gas Kinematics of Galaxies
Roland Szakacs, Céline Péroux, Martin Zwaan +7
We present results of MUSE-ALMA Halos, an ongoing study of the Circumgalactic Medium (CGM) of galaxies ( 1.4). Using multi-phase observations we probe the neutral, ionised…
MusE GAs Flow and Wind (MEGAFLOW) VI. A study of CIV and MgII absorbing gas surrounding [OII] emitting galaxies
Ilane Schroetter, Nicolas F. Bouché, Johannes Zabl +7
Using the MEGAFLOW survey, which consists of a combination of MUSE and UVES observations of 22 quasar fields selected to contain strong MgII absorbers, we measure covering fraction…
MUSE-ALMA Halos V: Physical properties and environment of z < 1.4 HI quasar absorbers
A. Hamanowicz, C. Peroux, M. A. Zwaan +11
We present results of the MUSE-ALMA Halos, an ongoing study of the Circum-Galactic Medium (CGM) of low redshift galaxies (z < 1.4), currently comprising 14 strong HI absorbers in f…
Simulating MOS science on the ELT: Ly forest tomography
J. Japelj, C. Laigle, M. Puech +14
Mapping of the large-scale structure through cosmic time has numerous applications in the studies of cosmology and galaxy evolution. At , the structure can be traced by the…
Metal-enriched Galaxies in the First ~1 Billion Years: Evidence of a Smooth Metallicity Evolution at z ~ 5
Suraj Poudel, Varsha P. Kulkarni, Frances H. Cashman +4
We present seven new abundance measurements of the elements O, C and Si at z > 4.5, doubling the existing sample of weakly depleted elements in gas-rich galaxies, in order to const…
Discovery of intergalactic bridges connecting two faint quasars
Fabrizio Arrigoni Battaia, Aura Obreja, J. Xavier Prochaska +6
We use MUSE/VLT to conduct a survey of physical quasar pairs at close separation with a fast observation strategy. Our aim is twofold: (i) explore the Ly glow around th…
Three- and two-point spatial correlations of intergalactic medium at using projected quasar triplets
Soumak Maitra, Raghunathan Srianand, Patrick Petitjean +4
We present analysis of two- and three-point correlation functions of Ly forest (at ) using X-Shooter spectra of three background quasar triplets probing transvers…
Multi-phase Circum-Galactic Medium probed with MUSE and ALMA
Celine Peroux, Martin Zwaan, Anne Klitsch +9
Galaxy halos appear to be missing a large fraction of their baryons, most probably hiding in the circumgalactic medium (CGM), a diffuse component within the dark matter halo that e…
Multicomponent H2 in DLA at zabs = 2.05: physical conditions through observations and numerical models
Katherine Rawlins, Raghunathan Srianand, Gargi Shaw +3
We perform detailed spectroscopic analysis and numerical modelling of an H2-bearing damped Lyman-alpha absorber (DLA) at zabs = 2.05 towards the quasar FBQS J2340-0053. Metal absor…
A Lyman limit system associated with galactic winds
Hadi Rahmani, Celine Peroux, Ilane Schroetter +9
Projected quasar galaxy pairs provide powerful means to study the circumgalactic medium (CGM) that maintains the relics of galactic feedback and the accreted gas from the intergala…
Simulating Surveys for ELT-MOSAIC: Status of the MOSAIC Science Case after Phase A
M. Puech, C. J. Evans, K. Disseau +17
We present the consolidated scientific case for multi-object spectroscopy with the MOSAIC concept on the European ELT. The cases span the full range of ELT science and require eith…
Characterising the Circum-Galactic Medium of Damped Lyman- Absorbing Galaxies
Ramona Augustin, Celine Peroux, Palle Moller +8
Gas flows in and out of galaxies through their circumgalactic medium (CGM) are poorly constrained and direct observations of this faint, diffuse medium remain challenging. We use a…
Spatially Resolved Metal Gas Clouds
Celine Peroux, Hadi Rahmani, Fabrizio Arrigoni Battaia +1
We now have mounting evidences that the circumgalactic medium (CGM) of galaxies is polluted with metals processed through stars. The fate of these metals is however still an open q…
Eclipsing damped Ly systems in the Sloan Digital Sky Survey Data Release 12
Hassan Fathivavsari, Patrick Petitjean, Narges Jamialahmadi +6
We present the results of our automatic search for proximate damped Ly absorption (PDLA) systems in the quasar spectra from the Sloan Digital Sky Survey Data Release 12. We cons…
Observational signatures of a warped disk associated with cold-flow accretion
Hadi Rahmani, Céline Péroux, Ramona Augustin +9
We present MUSE observations of the field of the quasar Q0152020 whose spectrum shows a Lyman limit system (LLS) at redshift , with a metallicity Z $\gtrsim…
Early metal enrichment of gas-rich galaxies at z~5
Suraj Poudel, Varsha P. Kulkarni, Sean Morrison +4
We present abundance measurements of elements O, C, Si and Fe for three gas-rich galaxies at z~5 using observations from the Very Large Telescope (VLT) and the Keck telescope in or…
CO-dark molecular gas at high redshift: very large H content and high pressure in a low metallicity damped Lyman-alpha system
S. A. Balashev, P. Noterdaeme, H. Rahmani +6
We present a detailed analysis of a H-rich, extremely strong intervening Damped Ly- Absorption system (DLA) at towards the quasar J0843+0221, observe…
WEAVE-QSO: A Massive Intergalactic Medium Survey for the William Herschel Telescope
M. M. Pieri, S. Bonoli, J. Chaves-Montero +12
In these proceedings we describe the WEAVE-QSO survey, which will observe around 400,000 high redshift quasars starting in 2018. This survey is part of a broader WEAVE survey to be…
HI 21-cm absorption survey of quasar-galaxy pairs: Distribution of cold gas around z<0.4 galaxies
R. Dutta, R. Srianand, N. Gupta +4
We present the results from our survey of HI 21-cm absorption, using GMRT, VLA and WSRT, in a sample of 55 z<0.4 galaxies towards radio sources with impact parameters (b) in the ra…
Nature of the Absorbing Gas associated with a Galaxy Group at z~0.4
Celine Peroux, Hadi Rahmani, Samuel Quiret +6
We present new MUSE observations of quasar field Q2131-1207 with a log N(HI)=19.50+/-0.15 sub-DLA at z_abs=0.42980. We detect four galaxies at a redshift consistent with that of th…
A study of the circum-galactic medium at z ~ 0.6 using DLA-galaxies
Hadi Rahmani, Celine Peroux, David A. Turnshek +5
We present the study of a sample of nine QSO fields, with damped-Ly-alpha (DLA) or sub-DLA systems at z~0.6, observed with the X-Shooter spectrograph at the Very Large Telescope. B…
Discovery of a Perseus-like cloud in the early Universe: HI-to-H2 transition, carbon monoxide and small dust grains at zabs=2.53 towards the quasar J0000+0048
P. Noterdaeme, J. -K. Krogager, S. Balashev +10
We present the discovery of a molecular cloud at zabs=2.5255 along the line of sight to the quasar J0000+0048. We perform a detailed analysis of the absorption lines from ionic, ne…