Astro-comb: revolutionizing precision spectroscopy in astrophysics

Details Astro-comb: revolutionizing precision spectroscopy in astrophysics Astro-comb: revolutionizing precision spectroscopy in astrophysics

Feb 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009iaus..253..499c&link_type=abstract

Transiting Planets, Proceedings of the International Astronomical Union, IAU Symposium, Volume 253, p. 499-501

Astronomy and Astrophysics

Astrophysics

Scientific paper

Searches for extrasolar planets using the periodic Doppler shift of stellar spectral lines have recently achieved a precision better than 60cm/s. To find a 1-Earth mass planet in an Earth-like orbit, a precision of 5cm/s is necessary. The combination of a laser frequency comb with a Fabry-Perot filtering cavity has been suggested as a promising approach to achieve such Doppler shift resolution via improved spectrograph wavelength calibration. Here we report the fabrication of such a filtered laser comb with up to 40 GHz (~1 Angstrom) line spacing, generated from a 1 GHz repetition-rate source, without compromising long-term stability, reproducibility or spectral resolution. This wide-line-spacing comb (astro-comb) is well matched to the resolving power of high-resolution astrophysical spectrographs. The astrocomb should allow a precision as high as 1cm/s in astronomical readial velocity measurements.

Affiliated with

Also associated with

No associations

Rating

Astro-comb: revolutionizing precision spectroscopy in astrophysics 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 Astro-comb: revolutionizing precision spectroscopy in astrophysics, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Astro-comb: revolutionizing precision spectroscopy in astrophysics will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-918326