The metallicity and internal structure of the Lyman-alpha forest clouds
@article{Cowie1995TheMA, title={The metallicity and internal structure of the Lyman-alpha forest clouds}, author={Lennox L. Cowie and Antoinette Songaila and Tae-Sun Kim and Esther M. Hu}, journal={The Astronomical Journal}, year={1995}, volume={109}, pages={1522-1530} }
219 Citations
Sample variance and Lyman α forest transmission statistics
- Physics
- 2013
We compare the observed probability distribution function (PDF) of the transmission in the H i Lyman {$α$} forest, measured from the Ultraviolet and Visual Echelle Spectrograph (UVES) `Large…
QSO Metal Absorption Systems at High Redshift and the Signature of Hierarchical Galaxy Formation
- Physics
- 1997
In a hierarchical cosmogony, galaxies build up by continuous merging of smaller structures. At z = 3, the matter content of a typical present-day galaxy is dispersed over several individual clumps…
Cosmological radiative transfer and the lonisation of the integalactic medium
- Physics
- 2011
Gravitational instability during the evolution of the Universe formed a large scale filamentary structure, known as the cosmic web. Baryons embedded in this cosmic web constitute the intergalactic…
HIRES Spectroscopy of APM 08279+5255: Metal Abundances in the Lyα Forest*
- Environmental Science
- 1999
We present high-S/N echelle spectra of the recently discovered ultraluminous QSO APM 08279+5255 and use these data to reexamine the abundance of carbon in Ly? forest clouds. In agreement with…
On the Origin of Metallicity in Lyα Forest Systems
- Physics
- 1997
We investigate the hypothesis that Ly? absorption lines arise in two populations of halos?minihalos of small circular velocity (Vc 55 km s-1), in which star formation and metal production are…
Hunting for metals using XQ-100 Legacy Survey composite spectra
- PhysicsMonthly Notices of the Royal Astronomical Society
- 2018
We investigate the NV absorption signal along the line of sight of background quasars, in order to test the robustness of the use of this ion as criterion to select intrinsic (i.e. physically related…
Metals in the z~3 intergalactic medium: results from an ultra-high signal-to-noise ratio UVES quasar spectrum
- Physics
- 2016
MV is supported by the ERC Starting Grant ‘cosmoIGM’ and PD51 INDARK grant. TSK acknowledges funding support from the ERC Starting Grant ‘cosmoIGM’, through grant GA-257670. MH was supported by the…
Triple-ionized carbon associated with the low-density neutral hydrogen gas at 1.7
- Computer Science
- 2016
It is expected if the line-of-sight extent of CIV is smaller than HI and N(CIV,sys) decreases more rapidly than N(HI, sys) at the larger impact parameter, regardless of the location of the HI+CIV gas in the IGM filaments or in the intervening galactic halos.
The broadening of Lyman-α forest absorption lines
- Physics
- 2015
We provide an analytical description of the line broadening of H I absorbers in the Lyman-α forest resulting from Doppler broadening and Jeans smoothing. We demonstrate that our relation captures the…
THE GASEOUS ENVIRONMENT OF HIGH-z GALAXIES: PRECISION MEASUREMENTS OF NEUTRAL HYDROGEN IN THE CIRCUMGALACTIC MEDIUM OF z ∼ 2-3 GALAXIES IN THE KECK BARYONIC STRUCTURE SURVEY*
- Physics
- 2012
We present results from the Keck Baryonic Structure Survey (KBSS), a unique spectroscopic survey of the
distant universe designed to explore the details of the connection between galaxies and…