C.D.S. - SIMBAD4 rel 1.7 - 2020.02.25CET23:56:19

2002A&A...381L..64M - Astronomy and Astrophysics, volume 381, L64-67 (2002/1-3)

The cosmic microwave background radiation temperature at zabs = 3.025 toward QSO 0347-3819.


Abstract (from CDS):

From the analysis of the C+ fine-structure population ratio in the damped Lyα system at zabs=3.025 toward the quasar Q0347-3819 we derive an upper bound of 14.6±0.2K on the cosmic microwave background temperature (TCMBR) regardless the presence of other different excitation mechanisms. The analysis of the ground state rotational level populations of H2detected in the system reveals a Galactic-type UV radiation field ruling out UV pumping as an important excitation mechanism for C+. The low dust content estimated from the Cr/Zn ratio indicates that the IR dust emission can also be neglected. When the collisional excitation is considered, we measure a temperature for the cosmic background radiation of TCMBR=12.1+1.7–3.2K. The results are in agreement with the TCMBR=10.968±0.004K predicted by the hot Big Bang cosmology at zabs=3.025.

Abstract Copyright:

Journal keyword(s): cosmology: observations: cosmic microwave background - quasars: absorption lines: individual: Q0347-3819

Simbad objects: 2

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Number of rows : 2

N Identifier Otype ICRS (J2000)
ICRS (J2000)
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
1 QSO B0347-383 QSO 03 49 43.6605705480 -38 10 30.834942758     17.3     ~ 175 0
2 LBQS 1232+0815 QSO 12 34 37.5507010309 +07 58 43.372966617     18.4     ~ 109 0

    Equat.    Gal    SGal    Ecl

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