Mid- and far-infrared fine-structure line sensitivities to hypothetical variability of the fine-structure constant

Details Mid- and far-infrared fine-structure line sensitivities to hypothetical variability of the fine-structure constant Mid- and far-infrared fine-structure line sensitivities to hypothetical variability of the fine-structure constant

2008-02-03

arxiv.org/abs/0802.0269v2

PRA, 77, 032119 (2008)

Astronomy and Astrophysics

Astrophysics

RevTeX4, 7 pages, submitted to PRA; v2: results for light ions (Z<10) have changed

Scientific paper

10.1103/PhysRevA.77.032119

Sensitivity coefficients to temporal variation of the fine-structure constant alpha for transitions between the fine-structure (FS) sub-levels of the ground states of C I, Si I, S I, Ti I, Fe I, N II, Fe II, O III, S III, Ar III, Fe III, Mg V, Ca V, Na VI, Fe VI, Mg VII, Si VII, Ca VII, Fe VII, and Si IX are calculated. These transitions lie in the mid- and far-infrared regions and can be observed in spectra of high-redshift quasars and infrared bright galaxies with active galactic nuclei. Using FS transitions to study alpha-variation over cosmological timescale allows to improve the limit on $|\Delta\alpha/\alpha|$ by several times as compared to contemporaneous optical observations ($|\Delta\alpha/\alpha| < 10^{-5}$), and to suppress considerably systematic errors of the radial velocity measurements caused by the Doppler noise. Moreover, the far infrared lines can be observed at redshifts z > 10, far beyond the range accessible to optical observations (z < 4). We have derived a simple analytical expression which relates the FS intervals and the sensitivity of the FS transitions to the change of alpha.

Affiliated with

Also associated with

No associations

Rating

Mid- and far-infrared fine-structure line sensitivities to hypothetical variability of the fine-structure constant 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 Mid- and far-infrared fine-structure line sensitivities to hypothetical variability of the fine-structure constant, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Mid- and far-infrared fine-structure line sensitivities to hypothetical variability of the fine-structure constant will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-236255