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Query : 2009MNRAS.395.1476R |
2009MNRAS.395.1476R - Mon. Not. R. Astron. Soc., 395, 1476-1490 (2009/May-3)
A downturn in intergalactic C IV as redshift 6 is approached.
RYAN-WEBER E.V., PETTINI M., MADAU P. and ZYCH B.J.
Abstract (from CDS):
These results point to a rapid build-up of intergalactic Civ over a period of only ∼300Myr; such a build-up could reflect the accumulation of metals associated with the rising levels of star formation activity from z ∼ 9 indicated by galaxy counts, and/or an increasing degree of ionization of the intergalactic medium (IGM), following the overlap of ionization fronts from star-forming regions. If the value of ΩCiv we derive is typical of the IGM at large, it would imply a metallicity ZIGM≳ 10–4Z☉. The early-type stars responsible for synthesizing these metals would have emitted only about one Lyman continuum photon per baryon prior to z = 5.8; such a background is insufficient to keep the IGM ionized and we speculate on possible factors which could make up the required shortfall.
Abstract Copyright: © 2009 The Authors. Journal compilation © 2009 RAS
Journal keyword(s): intergalactic medium - quasars: absorption lines - cosmology: observations
Simbad objects: 13
Number of rows : 13 |
N | Identifier | Otype |
ICRS (J2000) RA |
ICRS (J2000) DEC |
Mag U | Mag B | Mag V | Mag R | Mag I | Sp type |
#ref
1850 - 2024 |
#notes |
---|---|---|---|---|---|---|---|---|---|---|---|---|
1 | SDSS J020332.38+001229.0 | QSO | 02 03 32.389 | +00 12 29.10 | ~ | 45 | 0 | |||||
2 | SDSS J081827.40+172251.8 | QSO | 08 18 27.399 | +17 22 51.83 | 25.14 | 24.42 | ~ | 69 | 0 | |||
3 | SDSS J083643.85+005453.3 | QSO | 08 36 43.8598536120 | +00 54 53.233681320 | 26.19 | 24.17 | ~ | 154 | 0 | |||
4 | SDSS J084035.08+562419.7 | QSO | 08 40 35.08848 | +56 24 19.7712 | 24.95 | 23.93 | ~ | 58 | 0 | |||
5 | SDSS J103027.09+052455.0 | QSO | 10 30 27.092 | +05 24 55.02 | 26.15 | 25.44 | ~ | 269 | 0 | |||
6 | SDSS J104433.04-012502.0 | QSO | 10 44 33.040 | -01 25 02.08 | 21.81 | ~ | 175 | 1 | ||||
7 | SDSS J104845.05+463718.3 | QSO | 10 48 45.058 | +46 37 18.38 | 25.87 | 24.76 | ~ | 129 | 0 | |||
8 | SDSS J113717.72+354956.9 | QSO | 11 37 17.725 | +35 49 56.92 | 25.31 | 24.29 | ~ | 61 | 0 | |||
9 | SDSS J114816.64+525150.3 | QSO | 11 48 16.647 | +52 51 50.31 | 25.73 | 25.04 | ~ | 453 | 0 | |||
10 | SDSS J130608.25+035626.3 | QSO | 13 06 08.259 | +03 56 26.19 | 25.59 | 24.81 | ~ | 160 | 0 | |||
11 | SDSS J141111.27+121737.3 | QSO | 14 11 11.277 | +12 17 37.31 | 24.79 | 23.82 | ~ | 77 | 0 | |||
12 | SDSS J160253.98+422824.8 | QSO | 16 02 53.982 | +42 28 24.86 | 24.32 | 24.32 | ~ | 67 | 0 | |||
13 | SDSS J205406.49-000514.5 | QSO | 20 54 06.494 | -00 05 14.57 | ~ | 79 | 0 |
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