AI Insight
HRMOS (High-Resolution Multi-Object Spectrograph) is a proposed instrument for the ESO Very Large Telescope that combines very high spectral resolution (R=80,000) with the ability to observe 50-60 targets simultaneously. The instrument will achieve radial-velocity precision of 10 meters per second across three specific spectral windows in the visible light range. It uses a modular design with fiber-positioning technology, image slicers, and volume phase holographic gratings to enable unprecedented multi-object observations at high resolution.
Why it matters
This instrument will enable astronomers to study multiple objects at once with exceptional detail, addressing diverse research questions including giant exoplanet formation, determining the age of stars through nucleocosmochronology, refining cosmological parameters, and investigating how galaxies formed and assembled in the early universe beyond our own Milky Way.
Understand the Science
arXiv:2607.22411v1 Announce Type: new
Abstract: HRMOS (High-Resolution Multi-Object Spectrograph) is a proposed new instrument for the ESO Very Large Telescope (VLT) developed in the context of the ESO VLT Beyond 2030 call. It is designed to fill a unique and currently unoccupied region in the observational landscape: the combination of very high spectral resolution (R=80,000) with multi-object capability (50-60 simultaneous targets), a radial-velocity (RV) precision of 10m/s, and coverage of three key spectral windows (385-421nm, 480-522nm, 623-677nm). Scientifically, HRMOS will address a rich portfolio of high-priority astrophysical questions spanning from f giant exoplanet formation, to nucleocosmochronology and constraints on cosmological parameter, to probing hierarchical galaxy assembly outside the Milky Way. The instrument is based on a modular approach and it consists in four primary subsystems, the Front End with a hybrid fiber-positioning and atmospheric dispersion correction (ADC) architecture, the Fiber Link with double-scrambling and the image slicers, three spectrographs based on volume phase holographic (VPH) gratings covering the three spectral ranges and a Calibration Unit.
Source: HRMOS: a very high-resolution, multi-object spectrograph for the ESO VLT