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MOONS: a multi-object optical and near-infrared spectrograph for the VLT

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  • Michele Cirasuolo
  • J. Afonso
  • R. Bender
  • P. Bonifacio
  • C. Evans
  • L. Kaper
  • E. Oliva
  • L. Vanzi
  • M. Abreu
  • E. Atad-Ettedgui
  • C. Babusiaux
  • F. Bauer
  • P. Best
  • N. Bezawada
  • I. Bryson
  • A. Cabral
  • K. Caputi
  • M. Centrone
  • F. Chemla
  • A. Cimatti
  • M. R. Cioni
  • G. Clementini
  • J. Coelho
  • E. Daddi
  • J. Dunlop
  • S. Feltzing
  • A. Ferguson
  • H. Flores
  • A. Fontana
  • J. Fynbo
  • B. Garilli
  • A. Glauser
  • I. Guinouard
  • F. Hammer
  • P. Hastings
  • A. Hess
  • R. Ivison
  • P. Jagourel
  • M. Jarvis
  • G. Kauffman
  • A. Lawrence
  • D. Lee
  • G. Licausi
  • S. Lilly
  • D. Lorenzetti
  • R. Maiolino
  • F. Mannucci
  • R. McLure
  • D. Minniti
  • D. Montgomery
  • B. Muschielok
  • K. Nandra
  • R. Navarro
  • P. Norberg
  • L. Origlia
  • N. Padilla
  • J. Peacock
  • F. Pedicini
  • L. Pentericci
  • J. Pragt
  • M. Puech
  • S. Randich
  • A. Renzini
  • N. Ryde
  • M. Rodrigues
  • F. Royer
  • R. Saglia
  • A. Sanchez
  • H. Schnetler
  • R. Speziali
  • S. Todd
  • E. Tolstoy
  • M. Torres
  • L. Venema
  • F. Vitali
  • M. Wegner
  • M. Wells
  • V. Wild
  • G. Wright
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Article number84460S
<mark>Journal publication date</mark>2012
<mark>Journal</mark>Proceedings of SPIE
Volume8446
Publication StatusPublished
<mark>Original language</mark>English
EventGround-Based and Airborne Instrumentation for Astronomy IV - Amsterdam, Netherlands
Duration: 1/07/20126/07/2012

Conference

ConferenceGround-Based and Airborne Instrumentation for Astronomy IV
CountryNetherlands
CityAmsterdam
Period1/07/126/07/12

Abstract

MOONS is a new conceptual design for a Multi-Object Optical and Near-infrared Spectrograph for the Very Large Telescope (VLT), selected by ESO for a Phase A study. The baseline design consists of ∼1000 fibers deployable over a field of view of ∼500 square arcmin, the largest patrol field offered by the Nasmyth focus at the VLT. The total wavelength coverage is 0.8μm-1.8μm and two resolution modes: medium resolution and high resolution. In the medium resolution mode (R∼4,000-6,000) the entire wavelength range 0.8μm-1.8μm is observed simultaneously, while the high resolution mode covers simultaneously three selected spectral regions: one around the CaII triplet (at R∼8,000) to measure radial velocities, and two regions at R∼20,000 one in the J-band and one in the H-band, for detailed measurements of chemical abundances. The grasp of the 8.2m Very Large Telescope (VLT) combined with the large multiplex and wavelength coverage of MOONS - extending into the near-IR - will provide the observational power necessary to study galaxy formation and evolution over the entire history of the Universe, from our Milky Way, through the redshift desert and up to the epoch of re-ionization at z>8-9. At the same time, the high spectral resolution mode will allow astronomers to study chemical abundances of stars in our Galaxy, in particular in the highly obscured regions of the Bulge, and provide the necessary follow-up of the Gaia mission. Such characteristics and versatility make MOONS the long-awaited workhorse near-IR MOS for the VLT, which will perfectly complement optical spectroscopy performed by FLAMES and VIMOS.