Thirty Meter Telescope Science Forum 2017

November 7, 2017 - November 9, 2017

HRS Workshop

High-resolution spectroscopy with TMT - A science and instrument workshop:

  • Date: November 06 (half-day, morning only)
  • Location: Mysore, Infosys campus (same as TMT Science Forum)
  • Room: TBD
  • Contact person: Sivarani Thirupathi (
  • Program


  • Description: High resolution spectrograph (Optical/NIR) for TMT is a powerful instrument showcasing high sensitivity (from a large aperture) and recent progress in adaptive optics.  High resolution spectroscopy is useful for studies like those of exoplanet atmospheres, chemical/kinematical history of Milky-way and the resolved stellar populations in the local volume of  galaxies, ISM and IGM studies.  The work horse  nature of optical and NIR high resolution spectrographs in catering to a wide range of science cases and a large user community among the TMT partnership makes it an ideal 2nd generation instrument. Despite the tremendous interest in high resolution spectroscopy, there have been no focussed teams working towards the building of a high resolution spectrograph.
    This workshop aims  to bring the science and instrument teams across the partnership together to  form a working group that will collaborate and engage in building the TMT-HRS. The discussions will help prioritise key science areas and the technical specifications for these complex  instruments.  
    The topics of the workshop will include discussions on the following science areas and  examples of required performance,  signal to noise and exposure times for some key science cases:
    • Stellar and ISM abundances of resolved stellar populations in Milky-way and the neighbourhood
    • Stellar kinematics , cluster dynamics, stellar rotation and pulsations
    • Detection of exoplanet atmospheres
    • IGM studies
    • Key instrument concepts for Optical and NIR high resolution spectrographs
    • Stability requirements for the studies variations of fundamental constants and for the exoplanet detection of earth like and earth analogs.

We also propose to have dedicated discussion sessions on the key instrument requirements, e.g. the efficiencies across wavelengths, spectral resolution, stability, prioritising optical/NIR wavelengths and requirements on scalability/flexibility for AO/multiplexing/IFU, based on the potential science cases.  We also propose to review, new technologies that TMT-HRS can advantage of being a 2nd generation instrument.