Parallel Session: Southern Spectroscopic Survey Roadmaps

US/Pacific
Bldg. 50 Auditorium

Bldg. 50 Auditorium

Description

Meeting Webpage
Timetables
Remote: https://lbnl.zoom.us/join Or by phone,   US: +1 646 558 8656  or +1 669 900 6833  or +1 855 880 1246 (Toll Free) or +1 877 853 5257 (Toll Free).  The meeting ID is listed below.  

  • Tuesday, 14 November
    • Parallel Session: Southern Spectroscopic Survey Roadmaps

      Optical/IR spectroscopy has significant potential for dedicated facilities at the scale of LSST, especially if such a facility can fully survey the southern sky. Spectroscopic observations coordinated with LSST would greatly reduce the uncertainties associated with photometric redshifts, enable the measurements of spectroscopic redshifts of tens of thousands of supernovae and other transients, provide accurate velocity dispersions for galaxy clusters, and offer spectroscopic insight into many other sources measured photometrically by LSST. A facility of appropriate scale could be designed with current technologies to coincide with LSST observations. If designed with a larger upgrade in mind, such a facility could lead to the ultimate spectroscopic survey around the conclusion of LSST’s current program. A facility covering the IR to optical with >50,000 fibers would be capable of producing a galaxy sample of a half billion spectra or more. A dedicated survey of this scale will allow measurements of galaxy clustering to non-linear scales for redshifts z<1.5, measurements of all linear modes to z=3.5, and offer insight into astrophysics at all scales. A roadmap that progressively scales spectroscopic capabilities starting from DESI will need to address challenges in telescope availability, new instrumentation, and theory.

      This session will be devoted to talks presenting the scientific and technical potential for large spectroscopic surveys following the completion of DESI. Questions that will be addressed in this section include:
      What is the potential for the DESI spectrograph in 2024 and beyond?
      What range of spectroscopy is needed to supplement the LSST imaging program in the 2023-2032 timeframe?
      What is the appropriate match in timescale, cadence, and sample properties between spectroscopy and LSST imaging?
      What potential exists in a dedicated, massively multiplexed spectroscopic facility that could begin at the conclusion of the 10-yr LSST program?

      The following schedule will follow a format divided evenly between presentations and open discussion. Each talk is allocated 15 minutes that does include the open discussion. For the sake of time, presentations should be kept to fewer than ten slides and assume that all attendees have been informed of the basic concept of the spectroscopic roadmap.

      Zoom Meeting ID: 386 632 578

      Zoom link
      • 1
        DESI-II: Technical Capabilities and Potential Targeting Strategies
        Speaker: Dr David Schlegel (Lawrence Berkeley National Lab)
        Slides
      • 2
        DESI-II: Cosmology Forecasts
        Speaker: Patrick Mcdonald (LBL)
        Slides
      • 3
        Astrophysics and Dark Energy with Large-Aperture, Wide-Field Spectroscopy
        Speaker: Dr Adam Bolton (NOAO)
        Slides
      • 4
        Spectroscopic Support for LSST Science: A Dark Energy Perspective
        Speaker: Jeffrey Newman (University of Pittsburgh and PITT-PACC)
        Slides
      • 5
        Maunakea Spectroscopic Explorer
        Speaker: Prof. Pat Hall (York U.)
        Slides
      • 6
        Multi-fiber Spectroscopy on the Thirty Meter Telescope
        Speaker: Kevin Bundy (UCO/Lick)
        Slides
      • 7
        Fully Sampling the Density Field at z>2.1 with Lyman-alpha Forest
        Speaker: Dr K. G. Lee (LBL)
        Slides
      • 8
        Open Discussion: Planning Cosmological Forecasts for Staged Spectroscopic Experiments
        Slides
  • Wednesday, 15 November
    • Parallel Session: Southern Spectroscopic Survey Roadmaps

      This session will be dedicated to an open discussion of the white paper. We will discuss the outline of material to record in the white paper and identify people willing to provide content after the workshop. A subset of issues to address in the white paper include:

      How will each stage of DESI-II, coordinated LSST spectroscopy, and a fully comprehensive spectroscopic survey enhance our current knowledge of dark energy?
      How does the concept of enhanced spectroscopy as a whole fit into the cosmological picture?
      What is the appropriate timeline for each stage of spectroscopic facility?
      What are the key scientific, technical and logistical obstacles?
      How can we mitigate key scientific, technical, or logistical obstacles in the immediate future in a way that also enhances LSST/DESI science, as addressed in the three afternoon parallel sessions?

      Zoom link
      • 9
        Development of outline for the spectroscopic roadmap
        Slides