2011A&A...526L...7N


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.03CEST21:54:35

2011A&A...526L...7N - Astronomy and Astrophysics, volume 526, L7-7 (2011/2-1)

The evolution of the cosmic microwave background temperature. Measurements of TCMB at high redshift from carbon monoxide excitation.

NOTERDAEME P., PETITJEAN P., SRIANAND R., LEDOUX C. and LOPEZ S.

Abstract (from CDS):

A milestone of modern cosmology was the prediction and serendipitous discovery of the cosmic microwave background (CMB), the radiation leftover after decoupling from matter in the early evolutionary stages of the Universe. A prediction of the standard hot Big-Bang model is the linear increase with redshift of the black-body temperature of the CMB (TCMB). This radiation excites the rotational levels of some interstellar molecules, including carbon monoxide (CO), which can serve as cosmic thermometers. Using three new and two previously reported CO absorption-line systems detected in quasar spectra during a systematic survey carried out using VLT/UVES, we constrain the evolution of TCMB to z∼3. Combining our precise measurements with previous constraints, we obtain TCMB(z)=(2.725±0.002)x(1+z)1–βK with β=-0.007±0.027, a more than two-fold improvement in precision. The measurements are consistent with the standard (i.e. adiabatic, β=0) Big-Bang model and provide a strong constraint on the effective equation of state of decaying dark energy (i.e. weff=-0.996±0.025).

Abstract Copyright:

Journal keyword(s): cosmology: observations - cosmic background radiation - quasars: absorption lines

Simbad objects: 11

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Number of rows : 11

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 LBQS 0013-0029 QSO 00 16 02.4050445836 -00 12 25.076529860   18.67 18.36     ~ 175 0
2 QSO B0347-383 QSO 03 49 43.6605705480 -38 10 30.834942758     17.3     ~ 176 0
3 LB 8956 QSO 08 57 26.7928123389 +18 55 24.304264748   17.40 17.48     ~ 66 0
4 SDSS J104705.76+205734.5 QSO 10 47 05.7570986820 +20 57 34.506656628   20.26 19.92     ~ 17 0
5 LBQS 1232+0815 QSO 12 34 37.5507010309 +07 58 43.372966617     18.4     ~ 112 0
6 SDSS J123714.61+064759.6 QSO 12 37 14.6101756939 +06 47 59.610269423   19.66 19.15     ~ 48 0
7 QSO B1331+170 QSO 13 33 35.7826224 +16 49 04.014213   16.84 16.71 16.41   ~ 408 1
8 QSO J1439+1117 QSO 14 39 12.0427554986 +11 17 40.567315542   19.27 18.92     ~ 60 1
9 2MASS J16045749+2203007 QSO 16 04 57.5081984193 +22 03 00.512725927   19.84 19.49     ~ 21 0
10 [VV2006] J170542.9+354340 QSO 17 05 42.9130634940 +35 43 40.318149900   19.44 19.12     ~ 30 0
11 QSO B1830-211 QSO 18 33 39.92 -21 03 39.9     18.70 21   ~ 549 6

    Equat.    Gal    SGal    Ecl

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2020.07.03-21:54:35

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