The first spectral line surveys searching for signals from the dark ages

C. M. Persson; R. Maoli; P. Encrenaz; Å. Hjalmarson; M. Olberg; G. Rydbeck; M. Signore; U. Frisk; Aa. Sandqvist; J. Y. Daniel

doi:10.1051/0004-6361/200913395

Home

All issues

Volume 515 (June 2010)

A&A, 515 (2010) A72

Full HTML

Free Access

Table 11:

Estimated largest possible brightness temperature $T_{\rm b}$ for *optically thick resonant* lines, and $\upsilon _p(z)$ = $600/\sqrt {1+z}$ km s^-1.
Obs. Freq.	Maximum $\mid T_{\rm b} \mid$ [mK]
[GHz]	z = 10	z = 30	z = 100
1	1.6	0.98	0.54
50	1.5	0.92	0.51
100	1.3	0.76	0.42
200	0.64	0.38	0.21
300	0.24	0.14	0.078
400	0.071	0.042	0.024
500	0.019	0.011	0.006
600	0.005	0.003	0.002

Notes. This velocity is typical for clusters while for a smaller mass it could be higher. Note, that these values are the same for all species and transitions.

Source LaTeX | All tables | In the text

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.