A crucial test for astronomical spectrograph calibration with frequency combs
| Autor: | Dinko Milaković, Ronald Holzwarth, Thomas Udem, B. Toledo-Padrón, Antonio Manescau, Jonay I. González Hernández, Massimiliano Esposito, Yuanjie Wu, Frank Grupp, Anna Brucalassi, Josefina Urrutia, Hanna Kellermann, Luca Pasquini, Bruno L. Canto Martins, Florian Kerber, Alejandro Suárez Mascareño, Rafael Rebolo, Rafael A. Probst, Gaspare Lo Curto, Theodor W. Hänsch, I. C. Leão, José Renan de Medeiros, Eszter Pozna, Olaf Mandel, Tilo Steinmetz, Gerardo Avila |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Physics
010504 meteorology & atmospheric sciences business.industry Astrophysics::Instrumentation and Methods for Astrophysics FOS: Physical sciences Astronomy and Astrophysics 01 natural sciences Stability (probability) Exoplanet Astronomical spectroscopy Stars symbols.namesake Optics 0103 physical sciences Calibration symbols Astrophysics::Earth and Planetary Astrophysics Laser frequency business Astrophysics - Instrumentation and Methods for Astrophysics 010303 astronomy & astrophysics Spectrograph Doppler effect Instrumentation and Methods for Astrophysics (astro-ph.IM) 0105 earth and related environmental sciences |
| Zdroj: | Nature astronomy |
| Popis: | Laser frequency combs (LFCs) are well on their way to becoming the next-generation calibration sources for precision astronomical spectroscopy. This development is considered key in the hunt for low-mass rocky exoplanets around solar-type stars whose discovery with the radial-velocity method requires cm/s Doppler precision. In order to prove such precise calibration with an LFC, it must be compared to another calibrator of at least the same precision. Being the best available spectrograph calibrator, this means comparing it to a second - fully independent - LFC. This test had long been pending, but our installation of two LFCs at the ultra-stable spectrograph HARPS presented the so far unique opportunity for simultaneous calibrations with two separate LFCs. Although limited in time, the test results confirm the 1 cm/s stability that has long been anticipated by the astronomical community. 22 pages, 14 figures. View the Nature Astronomy publication under https://rdcu.be/b1tMB . Nature Astronomy article available under https://www.nature.com/articles/s41550-020-1010-x |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|