540 citations · 2.3k across the 25 of their papers we have counts for
25 papers
Caught in the Act: A Metal-Rich High-Velocity Cloud in the Inner Galaxy
Frances H. Cashman, Andrew J. Fox, Bart P. Wakker +8
We characterize the chemical and physical conditions in an outflowing high-velocity cloud in the inner Galaxy. We report a super-solar metallicity of [O/H] = for the…
Molecular Gas within the Milky Way's Nuclear Wind
Frances H. Cashman, Andrew J. Fox, Blair D. Savage +9
We report the first direct detection of molecular hydrogen associated with the Galactic nuclear wind. The Far-Ultraviolet Spectroscopic Explorer spectrum of LS 4825, a B1 Ib-II sta…
Limits on non-canonical heating and turbulence in the intergalactic medium from the low redshift Lyman-alpha forest
James S. Bolton, Prakash Gaikwad, Martin G. Haehnelt +5
We examine the column density distribution function (CDDF) and Doppler parameter distribution from hydrodynamical simulations and Cosmic Origins Spectrograph (COS) observations of…
New Constraints on the free-streaming of warm dark matter from intermediate and small scale Lyman- forest data
Vid Iršič, Matteo Viel, Martin G. Haehnelt +12
We present new measurements of the free-streaming of warm dark matter (WDM) from Lyman- flux-power spectra. We use data from the medium resolution, intermediate redshift XQ-100…
Nuclear Outflow of the Milky Way: Studying the Kinematics and Spatial Extent of the Northern Fermi Bubble
Rongmon Bordoloi, Andrew J. Fox, Felix J. Lockman +7
We report new observations from a systematic, spectroscopic, ultraviolet absorption-line survey that maps the spatial and kinematic properties of the high-velocity gas in the Galac…
Exploring the Thermal State of the Low-Density Intergalactic Medium at z=3 with an Ultra-High Signal-to-Noise QSO Spectrum
A. Rorai, G. D. Becker, M. G. Haehnelt +11
At low densities the standard ionisation history of the intergalactic medium (IGM) predicts a decreasing temperature of the IGM with decreasing density once hydrogen (and helium) r…
Diagnosing galactic feedback with the line broadening in the low redshift Lyman-alpha forest
M. Viel, M. G. Haehnelt, J. S. Bolton +4
We compare the low redshift (z ~ 0.1) Lyman-alpha forest from hydrodynamical simulations with data from the Cosmic Origin Spectrograph (COS). We find tension between the observed n…
The Sherwood simulation suite: overview and data comparisons with the Lyman-alpha forest at redshifts 2 < z < 5
James S. Bolton, Ewald Puchwein, Debora Sijacki +5
We introduce a new set of large scale, high resolution hydrodynamical simulations of the intergalactic medium: the Sherwood simulation suite. These are performed in volumes 10^3-16…
Triple-ionised carbon associated with the low-density neutral hydrogen gas at 1.7 < z < 3.3: the integrated N(HI)-N(CIV) relation
Tae-Sun Kim, R. F. Carswell, C. Mongardi +4
From the Voigt profile fitting analysis of 183 intervening CIV systems at 1.7 < z < 3.3 in 23 high-quality UVES/VLT and HIRES/Keck QSO spectra, we find that a majority of CIV syste…
Evidence of bimodal physical properties of intervening, optically-thin CIII absorbers at z ~ 2.5
Tae-Sun Kim, Robert F. Carswell, Drake Ranquist
We present the Voigt profile analysis of 132 intervening CIV+CIII components associated with optically-thin HI absorbers at 2.1 < z < 3.4 in the 19 high-quality UVES/VLT and HIRES/…
Probing the Fermi Bubbles in Ultraviolet Absorption: A Spectroscopic Signature of the Milky Way's Biconical Nuclear Outflow
Andrew J. Fox, Rongmon Bordoloi, Blair D. Savage +9
Giant lobes of plasma extend 55 degrees above and below the Galactic Center, glowing in emission from gamma rays (the Fermi Bubbles) to microwaves (the WMAP haze) and polarized rad…
Absorption-Line Detections of K Gas in Spiral-Rich Groups of Galaxies
J. T. Stocke, B. A. Keeney, C. W. Danforth +10
Using the Cosmic Origins Spectrograph (COS) on the Hubble Space Telescope (HST) the COS Science Team has conducted a high signal-to-noise survey of 14 bright QSOs. In a previous pa…
The Properties of Low Redshift Intergalactic O VI Absorbers Determined from High S/N Observations of 14 QSOs with the Cosmic Origins Spectrograph
B. D. Savage, T. -S. Kim, B. P. Wakker +4
We report on the observed properties of the plasma revealed through high signal-to-noise (S/N) observations of 54 intervening O VI absorption systems containing 85 O VI and 133 H I…
The evolution of HI and CIV quasar absorption line systems at 1.9 < z < 3.2
Tae-Sun Kim, Adrian M. Partl, Robert F. Carswell +1
We have investigated the distribution and evolution of ~3100 intergalactic HI absorbers with HI column densities log N(HI) = [12.75, 17.0] at 1.9 < z < 3.2, using 18 high resolutio…
A Survey of Weak MgII Absorbers at 0.4 < z < 2.4
Anand Narayanan, Toru Misawa, Jane C. Charlton +1
We present results from a survey of weak MgII absorbers in the VLT/UVES spectra of 81 QSOs obtained from the ESO archive. In this survey, we identified 112 weak MgII systems within…
The physical properties of the Ly-Alpha forest at z > 1.5
Tae-Sun Kim, Robert F. Carswell, Stefano Cristiani +2
Combining a new, increased dataset of 8 QSOs covering the Ly-alpha forest at redshifts 1.5 < z < 3.6 from VLT/UVES observations with previously published results, we have investiga…
The Extended Emission-Line Region of 4C 37.43
Alan Stockton, John W. MacKenty, Esther M. Hu +1
We have explored the nature of the extended emission-line region around the z=0.37 quasar 4C 37.43, using extensive ground-based and HST imaging and spectroscopy. The velocity fiel…
The enrichment history of the intergalactic medium: O VI in Ly-alpha forest systems at redshift z ~ 2
Robert F. Carswell, Joop Schaye, Tae-Sun Kim
A search for O VI at redshifts corresponding to Ly-alpha lines in the z_em ~ 2.4 QSOs HE1122-1648 and HE2217-2818 reveals that a substantial fraction of those with H I column densi…
The evolution of the physical state of the IGM
Tae-Sun Kim, Stefano Cristiani, Sandro D'Odorico
Using a new, increased dataset of 7 QSOs from VLT/UVES observations combined with one QSO from the literature, the minimum Doppler parameters as a function of neutral hydrogen colu…
Exploring the intergalactic medium with VLT/UVES
S. Cristiani, S. Bianchi, S. D'Odorico +1
The remarkable efficiency of the UVES spectrograph at the VLT has made it possible to push high-resolution, high-S/N ground observations of the Ly-a forest down to z~1.5, gaining n…
Temperature fluctuations in the intergalactic medium
Tom Theuns, Saleem Zaroubi, Tae-Sun Kim +2
The temperature of the low-density intergalactic medium is set by the balance between adiabatic cooling resulting from the expansion of the universe, and photo-heating by the UV-ba…
The contribution of galaxies to the UV ionising background and the evolution of the Lyman forest
Simone Bianchi, Stefano Cristiani, Tae-Sun Kim
We have modelled the evolution of the number of Ly_alpha absorbers with redshift, resulting from the evolution of the ionising background and the Hubble expansion. The contribution…
The Lyman-Alpha Forest at 1.5 < z < 4
Tae-Sun Kim, Stefano Cristiani, Sandro D'Odorico
Using high resolution (R ~ 45000), high S/N (20-50) VLT/UVES observations covering the Lyman-alpha forest at 1.5 < z < 2.4 combined with similar observations at z > 2.4 from the li…
The Redshift Evolution of the Lyman Alpha Forest
Tae-Sun Kim, Esther M. Hu, Lennox L. Cowie +1
We have analyzed the properties of low column density Lyman alpha forest clouds (12.8 < log N_HI < 16.0) toward 5 QSOs at different redshifts, using high signal-to-noise data from…