Conveners
Galaxies, Feedback and the IGM
- There are no conveners in this block
Galaxies, Feedback and the IGM
- There are no conveners in this block
Galaxies, Feedback and the IGM
- Joseph Hennawi (MPIA)
Galaxies, Feedback and the IGM
- There are no conveners in this block
Galaxies, Feedback and the IGM
- Joop Schaye (Leiden Observatory)
Galaxies, Feedback and the IGM
- There are no conveners in this block
Prof.
Philipp Richter
(University of Potsdam)
24/06/2013, 14:20
Invited Talk
Dr
Benjamin Oppenheimer
(Leiden University)
24/06/2013, 15:00
Invited Talk
Dr
Richard Bielby
(Durham University)
24/06/2013, 15:40
Contributed Talk
We present results from the VLT LBG Redshift Survey (VLRS), probing the HI distribution around z ~ 3 galaxies. The VLRS consists of ~ 2,000 galaxy redshifts at z > 2 in the foreground of bright QSOs with pre-existing high-resolution spectra. We have further added to the QSO sample within our survey fields by identifying and observing fainter QSOs with X-Shooter. We present the widest area...
Dr
Matthew Pieri
(ICG, Portsmouth)
24/06/2013, 16:40
Contributed Talk
We present results from stacking Lyα forest absorbers in the BOSS sample to achieve a variety of goals. Chief among them is the measurement of metals in the intergalactic medium (IGM) associated with the forest using various transitions, including several elements and species only seen using this technique. Metals in the IGM provide a valuable tracer of mechanical feedback - a crucial...
Ms
Monica Turner
(Leiden Observatory)
24/06/2013, 17:10
Contributed Talk
We study the distribution of metals spanning a large range of ionization energies (from SiIII to OVI) in the circumgalactic medium, through a sample ~700 star-forming z~2.4 galaxies selected from the Keck Baryonic Structure Survey. Using 15 hyper-luminous background quasars, we search for metals in absorption near galaxies, in order to make 2D metal maps by taking the median optical depth in...
Prof.
Hsiao-Wen Chen
(The University of Chicago)
27/06/2013, 09:30
Invited Talk
I will review observations of the circumgalactic medium at low and high redshifts based on absorption spectroscopy, and present new resolved velocity maps of the CGM at intermediate redshifts.
Prof.
John Stocke
(CASA, U. of Colorado)
27/06/2013, 10:10
Contributed Talk
The Science Team for the Cosmic Origins Spectrograph (COS) has conducted a modest-sized survey of QSOs near very low-z galaxies to characterize gaseous galaxy halos. We have found that high (~100%) covering factors in Lyα absorption extend at least out to the virial radius for L>0.1L* galaxies. Standard photo-ionization modeling of these absorbers finds cloud sizes of 1—30 kpc, masses of...
Dr
Charles Danforth
(University of Colorado)
27/06/2013, 10:45
Contributed Talk
The Cosmic Origins Spectrograph on HST has been in operation for nearly four years and has accumulated a library of ~400 AGN sight lines. Many of these are suitable for probing the low-redshift IGM for HI (Lyα forest) and metal-ion absorbers. The result is an unprecedented view of the local (z<1) IGM several times larger and more sensitive than previous surveys. I will present initial results...
Dr
Neil Crighton
(MPIA)
27/06/2013, 11:45
Contributed Talk
I will present observations of the distribution and covering fraction of metal-enriched gas around star-forming galaxies at redshift ~2.5. Using high resolution spectra of background quasars at impact parameters from ~70 to 300 kpc from foreground galaxies, we have measured precise column densities from both cool ~10^4 K and hotter ~10^5 K gas. We compare our results to those for star-forming...
Mr
Nicolas Tejos
(Durham University)
27/06/2013, 12:15
Contributed Talk
I will present observational results on the large-scale connection between the Intergalactic medium (IGM) and galaxies at z<1. I will focus on a statistical approach to this problem by measuring the gas-galaxy 2-point cross-correlation, and comparing it with both the galaxy-galaxy and the gas-gas auto-correlations, as a function of different absorber/galaxy properties. These results come from...
Prof.
Todd Tripp
(University of Massachusetts)
28/06/2013, 09:30
Invited Talk
Theoretical studies have raised a number of important questions about the roles of gas inflows (accretion) and outflows (feedback) in galaxy evolution. Unfortunately, galactic gas flows are likely to have low densities and hence are difficult to observe with most techniques. However, QSO absorption lines provide sensitive observational probes of galactic flows, and the recent deployment of the...
Prof.
Varsha Kulkarni
(University of South Carolina)
28/06/2013, 10:10
Contributed Talk
Quasar absorption lines offer powerful probes to study the circumgalactic medium and the intergalactic medium. The gas-rich damped Lyα (DLA) and sub-DLA absorbers allow an especially detailed study of metals, gas, and dust in the circum-galactic medium. Most past studies of chemical composition of the absorbers focused on DLAs, rather than sub-DLAs. But recent studies by our team and others...
Dr
Sijing Shen
(University of California, Santa Cruz)
28/06/2013, 11:10
Invited Talk
I will present results on the kinematics, thermal and ionization state and spatial distribution of metal-enriched gas in the circumgalactic medium (CGM) of galaxies of different mass scales, using two suites of very high resolution cosmological hydrodynamic “zoom-in” simulations from Milky Way-like scales to (“Eris”) down to dwarf galaxies. The runs adopt a blastwave scheme for supernova...
Dr
Claudio Dalla Vecchia
(MPE)
28/06/2013, 11:50
Invited Talk
