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Directly constraining the spatial coherence of the circumgalactic medium
A. Afruni, S. Lopez, P. Anshul +9
One of the biggest puzzles regarding the circumgalactic medium (CGM) is the structure of its cool ( K) gas phase. While the kinematics of quasar absorption systems sugge…
The galaxy counterpart and environment of the dusty Damped Lyman-alpha Absorber at z=2.226 towards Q1218+0832
J. P. U. Fynbo, L. B. Christensen, S. J. Geier +8
We report on further observations of the field of the quasar Q1218+0832. Geier et al. 2019 presented the discovery of the quasar resulting from a search for quasars reddened and di…
Low-ionization iron-rich Broad Absorption-Line Quasar SDSS J1652+2650: Physical conditions in the ejected gas from excited FeII and metastable HeI
Balashev S. A., Ledoux C., Noterdaeme P. +4
We present high-resolution VLT/UVES spectroscopy and a detailed analysis of the unique Broad Absorption-Line system towards the quasar SDSS J165252.67+265001.96. This system exhibi…
Dissecting a 30 kpc galactic outflow at 1.7
Ahmed Shaban, Rongmon Bordoloi, John Chisholm +10
We present the spatially resolved measurements of a cool galactic outflow in the gravitationally lensed galaxy RCS0327 at using VLT/MUSE IFU observations. We prob…
Proximate molecular quasar absorbers: Chemical enrichment and kinematics of the neutral gas
P. Noterdaeme, S. Balashev, R. Cuellar +7
Proximate molecular quasar absorbers (PH2) are an intriguing population of absorption systems recently uncovered through strong H2 absorption at small velocity separation from the…
Chemical diversity of gas in distant galaxies: The metal and dust enrichment and variations within absorbing galaxies
T. Ramburuth-Hurt, A. De Cia, J. -K. Krogager +9
The chemical composition of gas in galaxies can be measured in detail from absorption spectroscopy. By studying gas in galaxies in this way, it is possible to investigate the small…
Orientation effects on cool gas absorption from gravitational-arc tomography of a z = 0.77 disc galaxy
A. Fernandez-Figueroa, S. Lopez, N. Tejos +11
We use spatially-resolved spectroscopy of a distant giant gravitational arc to test orientation effects on MgII absorption equivalent width (EW) and covering fraction (kappa) in th…
Dust depletion of metals from local to distant galaxies I: Peculiar nucleosynthesis effects and grain growth in the ISM
Christina Konstantopoulou, Annalisa De Cia, Jens-Kristian Krogager +8
Large fractions of metals are missing from the observable gas-phase in the interstellar medium (ISM) because they are incorporated into dust grains, a phenomenon called dust deplet…
Revealing the Nature of a Lyman- Halo in a Strongly Lensed Interacting System at
Manuel Solimano, Jorge González-López, Manuel Aravena +12
Spatially extended halos of H I Ly emission are now ubiquitously found around high-redshift star-forming galaxies. But our understanding of the nature and powering mechanisms of…
Multi-phase gas properties of extremely strong intervening DLAs towards quasars
A. Ranjan, R. Srianand, P. Petitjean +6
We present the results of a spectroscopic analysis of extremely strong damped Lyman-α absorbers (ESDLAs, log N(Hi)>=21.7) observed with VLT-XShooter. ESDLAs probe gas from within t…
A 30 kpc Spatially Extended Clumpy and Asymmetric Galactic Outflow at z 1.7
Ahmed Shaban, Rongmon Bordoloi, John Chisholm +10
We image the spatial extent of a cool galactic outflow with fine structure Fe II emission and resonant Mg II emission in a gravitationally lensed star-forming galaxy at $z = 1.…
Large Metallicity Variations in the Galactic Interstellar Medium
Annalisa De Cia, Edward B. Jenkins, Andrew J. Fox +5
The Interstellar Medium (ISM) comprises gases at different temperatures and densities, including ionized, atomic, molecular species, and dust particles. The neutral ISM is dominate…
Molecular gas budget and characterization of intermediate-mass star-forming galaxies at
M. Solimano, J. González-López, L. F. Barrientos +9
Star-forming galaxies (SFGs) with stellar masses below make up the bulk of the galaxy population at . The properties of the cold gas in these galaxies can o…
GRB host galaxies with strong H absorption: CO-dark molecular gas at the peak of cosmic star formation
K. E. Heintz, G. Björnsson, M. Neeleman +13
We present a pilot search of CO emission in three H-absorbing, long-duration gamma-ray burst (GRB) host galaxies at z~2-3. We used the Atacama Large Millimeter/sub-millimeter A…
H_2 molecular gas absorption-selected systems trace CO molecular gas-rich galaxy overdensities
Anne Klitsch, Celine Peroux, Martin A. Zwaan +3
Absorption-selected galaxies offer an effective way to study low-mass galaxies at high redshift. However, the physical properties of the underlying galaxy population remains uncert…
Telltale signs of metal recycling in the circumgalactic medium of a galaxy
N. Tejos, S. López, C. Ledoux +15
We present gravitational-arc tomography of the cool-warm enriched circumgalactic medium (CGM) of an isolated galaxy (``G1'') at . Combining VLT/MUSE adaptive-optics…
HD molecules at high redshift: cosmic-ray ionization rate in the diffuse interstellar medium
D. N. Kosenko, S. A. Balashev, P. Noterdaeme +3
We present a systematic study of deuterated molecular hydrogen (HD) at high redshift, detected in absorption in the spectra of quasars. We present four new identifications of HD li…
A Carbon-enhanced Lyman Limit System: Signature of the First Generation of Stars?
Siwei Zou, Patrick Petitjean, Pasquier Noterdaeme +4
We present the study of a Lyman limit system (LLS) at = 1.5441 towards quasar J134122.50+185213.9 observed with VLT X-shooter. This is a very peculiar system with str…
Nature of the DLA towards Q0528-250: High pressure and strong UV field revealed by excitation of CI, H2 and SiII
S. A. Balashev, C. Ledoux, P. Noterdaeme +3
We present the detection of excited fine-structure energy levels of singly-ionized silicon and neutral carbon associated with the proximate damped Lyman- system at $z_{\rm abs}=…
Gaia-assisted discovery of a detached low-ionisation BAL quasar with very large ejection velocities
J. P. U. Fynbo, P. Møller, K. E. Heintz +10
We report on the discovery of a peculiar Broad Absorption Line (BAL) quasar identified in our Gaia-assisted survey of red quasars. The systemic redshift of this quasar was difficul…
X-shooter observations of strong H-bearing DLAs at high redshift
S. A. Balashev, V. V. Klimenko, P. Noterdaeme +6
We present results from spectroscopic observations with X-shooter at the Very Large Telescope of seven H2-bearing DLAs at high redshifts (z). These DLAs were…
New constraints on the physical conditions in H-bearing GRB-host damped Lyman- absorbers
K. E. Heintz, J. Bolmer, C. Ledoux +25
We report the detections of molecular hydrogen (H), vibrationally-excited H (H), and neutral atomic carbon (CI), in two new afterglow spectra of GRBs\,181020A ($z=2.9…
Gaia-assisted selection of a quasar reddened by dust in an extremely-strong Damped Lyman-α Absorber at z=2.226
Stefan Geier, Kasper Elm Heintz, Johan Fynbo +7
Damped Lyman-α Absorbers (DLAs) as a class of QSO absorption-line systems are currently our most important source of detailed information on the cosmic chemical evolution of galaxi…
Cold gas in the early Universe. Survey for neutral atomic-carbon in GRB host galaxies at 1 < z < 6 from optical afterglow spectroscopy
K. E. Heintz, C. Ledoux, J. P. U. Fynbo +14
We present a survey for neutral atomic-carbon (CI) along gamma-ray burst (GRB) sightlines, which probes the shielded neutral gas-phase in the interstellar medium (ISM) of GRB host…