Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aas...20712003m&link_type=abstract
American Astronomical Society Meeting 207, #120.03; Bulletin of the American Astronomical Society, Vol. 37, p.1361
Astronomy and Astrophysics
Astronomy
Scientific paper
We present the physical properties of two strong MgII systems at z=0.4744 and z=0.4833 toward the quasar Q0454-220. A HIRES/Keck spectrum, with resolution R=45,000, covers prominent low ionization features: MgII, FeII, CaII, and MgI. A HST/STIS spectrum, with R=30,000, covers the CIV and SiIV doublets. Coverage of the Lyman series lines and Lyman break region for these systems is provided by a HST/FOS spectrum, with R=1,300. The z=0.4744 system is a sub-DLA system, and the z=0.4833 system also produces a full Lyman limit break. Beginning with Voigt profile fits to the highest resolution data, we modeled these systems using the Cloudy photoionization code. The incident radiation is assumed to be a Haardt and Madau extragalactic background spectrum due to quasars and star-forming galaxies. We derive ranges of ionization parameters, number densities, sizes, temperatures, and metallicities for the absorbing clouds.
This research was supported by NASA under grant NAG5-6399 NNG04GE73G and by NSF under grant AST-04-07138.
Charlton Jane C.
Churchill Christopher W.
Milutinovic Nikola
No associations
LandOfFree
On the Properties of Two Strong MgII Absorbers Towards Q0454-220 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with On the Properties of Two Strong MgII Absorbers Towards Q0454-220, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and On the Properties of Two Strong MgII Absorbers Towards Q0454-220 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1284956