2000ApJ...534...41R

Query : 2000ApJ...534...41R

2000ApJ...534...41R - Astrophys. J., 534, 41-56 (2000/May-1)

The evolution of the effective equation of state of the intergalactic medium.

RICOTTI M., GNEDIN N.Y. and SHULL J.M.

Abstract (from CDS):

We develop a method to extract the ``effective equation of state'' of the intergalactic medium from the Doppler (b) parameter distribution of the low-density Lyα forest. We test the method on numerical simulations and then apply it to published observations of the Lyα forest at redshifts z≃0-4. We find that the effective equation of state is close to isothermal at redshift z∼3, indicating that a second reheating of the intergalactic medium took place at z∼3. This reheating can plausibly be identified with the reionization of He II observed to occur at z∼3.

Abstract Copyright: ∼

Journal keyword(s): Cosmology: Theory - Equation of State - Galaxies: Intergalactic Medium - Galaxies: Quasars: Absorption Lines

Simbad objects: 21

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Number of rows : 21
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 QSO J0003-2603 QSO 00 03 22.9531962024 -26 03 18.304471908   18 17.53     ~ 293 0
2 6C 001403+811827 BLL 00 17 08.47489694 +81 35 08.1365094   17.60 16.52 15.95   ~ 405 1
3 ESO 113-45 Sy1 01 23 45.7631533440 -58 48 20.808928944   14.08 13.83 13.34   ~ 965 0
4 LBQS 0302-0019 QSO 03 04 49.8593341368 -00 08 13.534398816   18.08 17.80 17.5   ~ 261 0
5 Z 395-23 Sy1 05 16 11.4092471904 -00 08 59.157166920   14.30 13.92     ~ 953 1
6 QSO B0636+68 BLL 06 42 04.2572705040 +67 58 35.620484340     16.46 16.01   ~ 234 1
7 QSO J0831+5245 QSO 08 31 41.7108197808 +52 45 17.616994560   19.2   14.5 13.9 ~ 574 1
8 QSO J0958+1202 QSO 09 58 52.1994218616 +12 02 45.038331528   18.24 17.91     ~ 129 0
9 Z 184-50 BLL 11 04 27.3140835504 +38 12 31.798495872   13.50 12.90 8.31   ~ 2841 1
10 Ton 618 Bla 12 28 24.9659725464 +31 28 37.628987592   16.15 15.87 15.35   ~ 294 1
11 2MASS J12305003+0115226 Sy1 12 30 50.0331165552 +01 15 22.598028288   14.44 14.42     ~ 102 0
12 Z 336-28 Sy1 13 53 03.4348964112 +69 18 29.410910460   15.15 14.46     ~ 812 1
13 Z 296-15 Sy1 14 36 22.0820611632 +58 47 39.394934844   14.19 13.79     ~ 592 0
14 Mrk 290 Sy1 15 35 52.4031021552 +57 54 09.515660508   15.55 15.27     ~ 575 0
15 QSO B1759+7539 BLL 17 57 46.3590423768 +75 39 16.181909928     16.50     ~ 90 0
16 ClG 1821+64 ClG 18 21 56.7276 +64 20 55.841           ~ 511 1
17 7C 1821+6419 Sy1 18 21 57.2130271440 +64 20 36.221312076   14.23 14.24     ~ 632 1
18 ESO 141-55 Sy1 19 21 14.1473895816 -58 40 12.982437480   14.36 13.64 13.28   ~ 394 0
19 QSO B1946+770 QSO 19 44 54.8532392016 +77 05 52.673448048     15.8     ~ 156 0
20 Mrk 509 Sy1 20 44 09.7504483224 -10 43 24.727155528   13.35 13.12 10.7   ~ 1370 0
21 PKS J2158-3013 BLL 21 58 52.0652249880 -30 13 32.118447792   13.36 13.09 12.62   ~ 1829 1

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