# Workshop on LABORATORY ASTROPHYSICS: Interstellar Gas, Dust and Ice

28-30 September 2016
Tagungstätte Schloss Ringberg, Kreuth
UTC timezone
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# Contribution Invited Talk

Tagungstätte Schloss Ringberg, Kreuth -
MORNING SESSION 1 - GAS PHASE

# Comb-based spectroscopy and astrophysical applications

## Speakers

• Prof. Ansgar REINERS

## Content

High-precision spectroscopy relies on high signal-to-noise data and optimal calibration. The technogical limits of calibration are often set by detector noise and instrument stability, but the latest generation of high-resolution stabilized spectrographs (e.g., HARPS, CARMENES, ESPRESSO, E-ELT HIRES) are also designed for experiments that require frequency precision as high as 10$^{-10}$ or 10 cm/s in Doppler stability. Typical applications are the search for extrasolar planets, fundamental constants, the expansion of the universe, and basic understanding of atomic and molecular transitions. Such requirements must be met or exceeded by laboratory standards. I will give an overview about frequency calibration standards used in astronomical spectrographs for optical and near-IR frequencies, and I will show results from laboratory and on-sky experiments that we are carrying out in Göttingen.