A new approach for testing variations of fundamental constants over cosmic epochs using FIR fine-structure lines

Details A new approach for testing variations of fundamental constants over cosmic epochs using FIR fine-structure lines A new approach for testing variations of fundamental constants over cosmic epochs using FIR fine-structure lines

2007-12-18

arxiv.org/abs/0712.2890v1

Astron. & Astrophys, 479, 719 (2008)

Astronomy and Astrophysics

Astrophysics

5 pages, to appear in A&A main journal

Scientific paper

10.1051/0004-6361:20079116

Aims. To obtain limits on the variation of the fine-structure constant alpha and the electron-to-proton mass ratio mu over different cosmological epochs. Methods. A new approach based on the comparison of redshifts of far infrared (FIR) fine-structure lines and low-lying rotational transitions in CO is proposed which is in principle more sensitive by a factor of 10 compared to QSO metal absorption lines. Results. Estimations of the quotient F = alpha^2/mu obtained for two distant quasars J1148+5251 (z = 6.42) and BR1202-0725 (z = 4.69) provide Delta F/F = (0.1+/-1.0)10^{-4} and (1.4+/-1.5)10^{-4}, respectively. The obtained limits are consistent with no variation of physical constants at the level of 0.01% over a period of 13 Gyr. Conclusions. Upcoming observations of quasars and distant galaxies in FIR fine-structure lines of different species and in CO low rotational lines at the SOFIA, HSO, and ALMA are expected to improve the current limit by, at least, an order of magnitude.

Affiliated with

Also associated with

No associations

Rating

A new approach for testing variations of fundamental constants over cosmic epochs using FIR fine-structure lines does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with A new approach for testing variations of fundamental constants over cosmic epochs using FIR fine-structure lines, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A new approach for testing variations of fundamental constants over cosmic epochs using FIR fine-structure lines will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-549094