P. Huke
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View article: Validation of the ESPRESSO Wavelength Calibration Using Iodine Absorption Cell Spectra
Validation of the ESPRESSO Wavelength Calibration Using Iodine Absorption Cell Spectra Open
High quality wavelength calibration is crucial for science cases like radial-velocity studies of exoplanets, the search for a possible variation of fundamental constants, and the redshift drift experiment. However, for state-of-the-art spe…
View article: Validation of the ESPRESSO wavelength calibration using iodine absorption cell spectra
Validation of the ESPRESSO wavelength calibration using iodine absorption cell spectra Open
High-quality wavelength calibration is crucial for science cases like radial-velocity studies of exoplanets, the search for a possible variation of fundamental constants, and the redshift drift experiment. However, for state-of-the-art spe…
View article: ANDES, the high resolution spectrograph for the ELT: project management and system engineering approaches for mastering its preliminary design phase
ANDES, the high resolution spectrograph for the ELT: project management and system engineering approaches for mastering its preliminary design phase Open
At the end of 2021, the ESO council approved the start of the construction phase for a High Resolution Spectrograph for the ELT, formerly known as ELT-HIRES, renamed recently as ANDES (ArmazoNes high Dispersion Echelle Spectrograph). The c…
View article: A near-infrared Fabry-Pérot for Fourier-transform spectrograph calibration
A near-infrared Fabry-Pérot for Fourier-transform spectrograph calibration Open
The Solar observatory at the Institute for Astrophysics and Geophysics Göttingen makes use of the ultra-high resolving power (R < 900, 000 at 600 nm) of a Fourier transform spectrograph (FTS) to obtain spectra of the resolved and integrate…
View article: In-Line Observation of Laser Cladding Processes via Atomic Emission Spectroscopy
In-Line Observation of Laser Cladding Processes via Atomic Emission Spectroscopy Open
Direct metal deposition (DMD) can be used for the cladding of surfaces as well as repairing and additive manufacturing of parts and features. Process monitoring and control methods ensure a consistent quality during manufacturing. Monitori…
View article: Spectral envelope control for a flat frequency comb spectrum
Spectral envelope control for a flat frequency comb spectrum Open
Laser frequency combs have properties that make them promising spectrograph calibration light sources. One drawback for this application is the high dynamic range in the supercontinuum spectra of some frequency combs. We aim to flatten the…
View article: HIRES, the high-resolution spectrograph for the ELT
HIRES, the high-resolution spectrograph for the ELT Open
HIRES will be the high-resolution spectrograph of the European Extremely Large Telescope at optical and near-infrared wavelengths. It consists of three fibre-fed spectrographs providing a wavelength coverage of 0.4-1.8 mic (goal 0.35-1.8 m…
View article: HIRES, the High-resolution Spectrograph for the ELT
HIRES, the High-resolution Spectrograph for the ELT Open
HIRES will be the high-resolution spectrograph at optical and near-infrared (NIR) wavelengths for ESO’s Extremely Large Telescope (ELT). It will consist of three fibre-fed spectrographs providing a wavelength coverage of 0.4–1.8 µm (with a…
View article: Fiber-coupling of Fourier transform spectrographs
Fiber-coupling of Fourier transform spectrographs Open
Fourier Transform Spectrographs (FTS) are versatile tools for measuring accurate, high resolution spectra. They are internally calibrated by a reference laser that runs in parallel to the science light. Therefore it is crucial to properly …
View article: ELT-HIRES, the high resolution spectrograph for the ELT: the Phase A study and the path to construction
ELT-HIRES, the high resolution spectrograph for the ELT: the Phase A study and the path to construction Open
International audience
View article: Spectral envelope control for a flat frequency comb spectrum
Spectral envelope control for a flat frequency comb spectrum Open
Laser frequency combs have properties which make them promising spectrograph calibration light sources. One drawback for this application is the high dynamic range in the supercontinuum spectra of some frequency combs. We aim to flatten th…
View article: Analysis of signal to noise ratio in coronagraph observations of coronal mass ejections
Analysis of signal to noise ratio in coronagraph observations of coronal mass ejections Open
We establish a baseline signal-to-noise ratio (SNR) requirement for the European Space Agency (ESA)-funded Solar Coronagraph for OPErations (SCOPE) instrument in its field of view of 2.5–30 solar radii based on existing observations by the…
View article: SCOPE: a coronagraph for operational space weather prediction: phase A/B1 design and breadboarding
SCOPE: a coronagraph for operational space weather prediction: phase A/B1 design and breadboarding Open
Accurate prediction of the arrival of solar wind phenomena, in particular coronal mass ejections (CMEs), is becoming more important given our ever-increasing reliance on technology. SCOPE is a coronagraph specifically optimised for operati…
View article: Characterization and calibration of a Fourier-transform spectrometer using a laser frequency comb
Characterization and calibration of a Fourier-transform spectrometer using a laser frequency comb Open
Funder: \n Bundesministerium für Bildung und Forschung (BMBF)\n http://dx.doi.org/10.13039/501100002347
View article: The CARMENES search for exoplanets around M dwarfs
The CARMENES search for exoplanets around M dwarfs Open
Context. Teegarden’s Star is the brightest and one of the nearest ultra-cool dwarfs in the solar neighbourhood. For its late spectral type (M7.0 V), the star shows relatively little activity and is a prime target for near-infrared radial v…
View article: The CARMENES search for exoplanets around M dwarfs. Two temperate Earth-mass planet candidates around Teegarden's Star
The CARMENES search for exoplanets around M dwarfs. Two temperate Earth-mass planet candidates around Teegarden's Star Open
Context. Teegarden's Star is the brightest and one of the nearest ultra-cool dwarfs in the solar neighbourhood. For its late spectral type (M7.0V), the star shows relatively little activity and is a prime target for near-infrared radial ve…
View article: Phase-correction algorithm for Fourier transform spectroscopy of a laser frequency comb
Phase-correction algorithm for Fourier transform spectroscopy of a laser frequency comb Open
Funder: \n Bundesministerium für Bildung und Forschung\n http://dx.doi.org/10.13039/501100002347
View article: ELT-HIRES the high resolution spectrograph for the ELT: application of E2E + ETC for instrument characterisation, from efficiency to accuracy in radial velocity measurements
ELT-HIRES the high resolution spectrograph for the ELT: application of E2E + ETC for instrument characterisation, from efficiency to accuracy in radial velocity measurements Open
We present an application of the HIRES End-to-End (E2E) simulator and HIRES Exposure Time Calculator (ETC) to derive a more detailed behavior of the spectrograph efficiency by including physical modeling of diffraction at the echelle grati…
View article: ELT -HIRES the High Resolution Spectrograph for the ELT: Fabry-Pérots for use as calibration sources
ELT -HIRES the High Resolution Spectrograph for the ELT: Fabry-Pérots for use as calibration sources Open
High resolution spectroscopy enables the detection of atmospheres of exoplanets. To reach the required radial velocity precision of about 1 m/s, calibration with even more precise sources is mandatory. HIRES will employ several calibration…
View article: Data analysis methods for laser frequency comb line position measurements with a Fourier transform spectrograph
Data analysis methods for laser frequency comb line position measurements with a Fourier transform spectrograph Open
Astrophysical calibration sources which can be used for high-precision radial-velocity spectroscopy require a calibration with even higher precision and accuracy. Calibration of these sources can be achieved with a high-resolution Fourier-…
View article: ELT -HIRES, the high resolution spectrograph for the ELT; the end-to-end simulator: design approach and results.
ELT -HIRES, the high resolution spectrograph for the ELT; the end-to-end simulator: design approach and results. Open
We present the updated design and architecture of the End-to-End simulator model of the high resolution spectrograph HIRES for the future Extremely Large Telescope (ELT). The model allows to simulate the propagation of photons starting fro…
View article: ELT-HIRES, the high resolution spectrograph for the ELT: results from the Phase A study
ELT-HIRES, the high resolution spectrograph for the ELT: results from the Phase A study Open
We present the results from the phase A study of ELT-HIRES, an optical-infrared High Resolution Spectrograph for ELT, which has just been completed by a consortium of 30 institutes from 12 countries forming a team of about 200 scientists a…
View article: FOURIER-TRANSFORM COMPLEX REFRACTIVE INDEX SPECTROSCOPY AT Hz-LEVEL WITH OPTICAL FREQUENCY COMBS
FOURIER-TRANSFORM COMPLEX REFRACTIVE INDEX SPECTROSCOPY AT Hz-LEVEL WITH OPTICAL FREQUENCY COMBS Open
Here we present a new mid-infrared frequency comb system for rapid spectral acquisition using a virtually imaged phased array (VIPA) spectrometer.\\footnote{L. Nugent-Glandorf et al., \\textit{Opt. Lett.} \\textbf{37,} 3285 (2012)} A diffe…
View article: Comparing the emission spectra of U and Th hollow cathode lamps and a new U line list
Comparing the emission spectra of U and Th hollow cathode lamps and a new U line list Open
Context . Thorium hollow cathode lamps (HCLs) are used as frequency calibrators for many high resolution astronomical spectrographs, some of which aim for Doppler precision at the 1 m s −1 level. Aims . We aim to determine the most suitabl…
View article: A systematic approach to determining the properties of an iodine absorption cell for high-precision radial velocity measurements
A systematic approach to determining the properties of an iodine absorption cell for high-precision radial velocity measurements Open
Absorption cells filled with diatomic iodine are frequently employed as\nwavelength reference for high-precision stellar radial velocity determination\ndue their long-term stability and low cost. Despite their wide-spread usage in\nthe com…
View article: Fourier-Transform Frequency Comb Cavity Mode Spectroscopy at Hz Level for Trace Gas Measurements
Fourier-Transform Frequency Comb Cavity Mode Spectroscopy at Hz Level for Trace Gas Measurements Open
We present precise broadband measurements of absorption and dispersion spectra of carbon monoxide 0-3 band in argon. They were performed using frequency comb cavity mode width and dispersion spectroscopies with a mechanical FTS setup.
View article: The CARMENES search for exoplanets around M dwarfs - HD 147379b: A nearby Neptune in the temperate zone of an early-M dwarf
The CARMENES search for exoplanets around M dwarfs - HD 147379b: A nearby Neptune in the temperate zone of an early-M dwarf Open
We report on the first star discovered to host a planet detected by radial velocity (RV) observations obtained within the CARMENES survey for exoplanets around M dwarfs. HD 147379 ($V = 8.9$ mag, $M = 0.58 \pm 0.08$ M$_{\odot}$), a bright …
View article: The CARMENES search for exoplanets around M dwarfs
The CARMENES search for exoplanets around M dwarfs Open
We report on the first star discovered to host a planet detected by radial velocity (RV) observations obtained within the CARMENES survey for exoplanets around M dwarfs. HD 147379 ( V = 8.9 mag, M = 0.58 ± 0.08 M ⊙ ), a bright M0.0 V star …
View article: The CARMENES search for exoplanets around M dwarfs
The CARMENES search for exoplanets around M dwarfs Open
The CARMENES radial velocity (RV) survey is observing 324 M dwarfs to search for any orbiting planets. In this paper, we present the survey sample by publishing one CARMENES spectrum for each M dwarf. These spectra cover the wavelength ran…
View article: The CARMENES search for exoplanets around M dwarfs: High-resolution optical and near-infrared spectroscopy of 324 survey stars
The CARMENES search for exoplanets around M dwarfs: High-resolution optical and near-infrared spectroscopy of 324 survey stars Open
The CARMENES radial velocity (RV) survey is observing 324 M dwarfs to search for any orbiting planets. In this paper, we present the survey sample by publishing one CARMENES spectrum for each M dwarf. These spectra cover the wavelength ran…