GISMO and the Greenland Telescope - Mapping the Young Universe from Greenland
GISMO And The Greenland Telescope - Mapping the Young Universe from Greenland
Thomas R. Greve What is the GLT? - A brief history
Atacama Large Millimeter/submillimeter Array (ALMA) • The GLT is a US prototype antenna for ALMA.
• Designed and built by VERTEX.
• Awarded to Academica Sinica (Taiwan) and Smithsonian Astrophysical Observatory (US) in 2012.
• Brought to Thule in 2016.
• ALMA and GLT are radio telescopes
• Observe at (sub-)millimeter wavelengths
• Study cold and dusty objects in the Universe What is the GLT? - Currents partners & budget
The GLT in Thule • NSF: ~22M$ (local infrastructure)
• SAO: ~10M$ (support buildings)
• ASIAA: ~14M$ (telescope facility) What is the GLT? - Currents partners & budget
The GLT in Thule • NSF: ~22M$ (local infrastructure)
• SAO: ~10M$ (support buildings)
• ASIAA: ~14M$ (telescope facility)
Future Partners What is the GLT? - Specifications
• A 12m radio telescope, optimised for observations at sub-mm wavelengths
• Cassegrain system with 15 arcminute field of view The GLT in Thule • Currently located at Thule Airbase →Greenland Summit (~2022).
• Summit: TARGET:N72.5 W38.5, altitudeSUMMIT 3200m. STATION GREENLAND Excellent atmospheric conditions for sub-mm observations !N!72.5,!W!38.5,!al-tude:!3200!m!
Greenland Summit What is the GLT? - Observations and current instrumentation
The GLT in Thule
• 2017: First light
• 2018: first 230GHz fringes between GLT and ALMA
• 2018: 350GHz VLBI testing
• 2018: participating in observations for the Event Horizon Telescope (EHT)
The EHT Made World Headlines in April 2019
First image ever of a black hole - historic discovery! Danish GLT Steering Group * - Overview www.greenlandtelescope.dk
Current members
• Thomas Greve (DAWN, DTU Space) • Georgios Magdis (DAWN, DTU Space)
• Jes Jørgensen (Starplan, NBI) • Lars Kristensen (Starplan, NBI) • Marianne Vestergaard (Dark, NBI)
• Jørgen Peder Steffensen (Ice and Climate, NBI)
National coordination Science/ Logistics Funding Instrumentation
* Operates under The Instrument Center for Danish Astrophysics (https://phys.au.dk/ida/) National coordination - Activities so far
Year ‘zero’ Sep 2018 • Renewed Danish interest in the GLT, sparked by DTU Space pitch for GLT science sent to IDA (Instrument center for Danish Astrophysics). Jan 2019 • Talks with Johannes Staguhn (NASA) about bringing the GISMO camera to the GLT Feb 2019 • DTU-DAWN and NBI-Starplan arranges GLT meeting in Copenhagen with participation of TW and US partners. • Talks with Jørgen Peder Steffensen on moving GLT to Greenland Summit • Danish GLT Steering Group is formed • www.greenlandtelescope.dk is launched
Apr 2019 • Press conference at DTU Space on EHT / M87 black hole discovery. Lots of national media attention on the EHT and GLT • The next day the (then) Danish Minister of Research requests a personal briefing on black holes. Aug 2019 • Paul Ho visits DK to discuss Danish involvement (logistics, instrumentation). Agree to formulate an official Letter of Interest between the relevant Danish, Taiwanese, and US partners.
Jan 2020 • Carlsberg Infrastructure Grant awarded to bring GISMO to the GLT.
COVID-19
Feb 2021 • National GLT Meeting for all interested parties National coordination - www.greenlandtelescope.dk Science / Instrumentation - Overview
Science Instrumentation
• Gas accretion onto black holes, • GISMO 2mm camera active galactic nuclei • Heterodyne high-frequency • Galaxy formation and evolution receivers
• Star formation and interstellar • Instrumentation development and medium pathfinder instruments Science / Instrumentation - GISMO
GISMO installation
• 128 pixel TES bolometer camera optimised for 2mm observations (PI: J. Staguhn, NASA)
• Proven concept at IRAM 30m telescope
• Technical discussion and planning have begun
• Will require structural changes to GLT receiver cabin.
Distant dusty starburst galaxies
GISMO 2mm map Science / Instrumentation - GISMO
The GLT-GISMO Extragalactic Survey (PI: T. Greve, DTU Space)
• A 2mm extragalactic survey of • Probe the large scale structure of unprecedented area and depth. the early Universe.
• Map North Ecliptic Field (Euclid Dep • Identity the most massive galaxies Field). Rich ancillary data sets. < 1Gyr after Big Bang
Galaxies: z=6.5-7.3 7.3-9.0 z=5 DM density simulation (Springer+05) Dec(deg) Logistics - GLT move Summit move (J.-P. Steffensen, NBI)
• Put skis on the telescope
• 6 skis. Each ski weighs 1.2ton. Dimensions 4.52m × 1.10m.
• Make use of existing US traverse train at Thule for transportation of GLT parts to Summit. Logistics - GLT moveat Summit
GLT Assembly and Summit camp
• EGRIP camp will move to Summit for rendevouos with GLT.
• EGRIP: camp while construction GLT and GLT facilities
• EGRIP: provide manpower and machinery for site preparation and GLT assembly.
• Time-frame: 2023-2024 Funding - Overview
Sources
• Danish Center for Instrumentation (Small) • Carlsberg Infrastructure Research Grant (Medium) • Danmarks Frie Forskningsfond (Medium) • Villum Fonden (Medium) • Maersk (Large) • Other
Successful applications
• Carlsberg Infrastructure Research Grant (1.4MDKK. PI: Greve). To fund transport, installation and commissioning of GISMO onto GLT in Thule. Time-frame: Jan 2020 - July 2022. Funding - Overview
Sources
• Danish Center for Instrumentation (Small) • Carlsberg Infrastructure Research Grant (Medium) • Danmarks Frie Forskningsfond (Medium) • Villum Fonden (Medium) • Maersk (Large) • Other
Planned applications
• Maersk (15-20MDKK; DTU-NBI lead). To fund transport, construction of GLT at Summit. GLT Involvement Across DTU - Artic DTU Possibilities
DTU Wind Energy
• GLT power supply from a small wind turbine. • Putting Green in the Greenland Telescope • Explore arctic windmill design and feasability • DTU, Greenland, and a private company • People: Abrahamsen, Sempreviva, Larsen, Høgenhaven, Kappel DTU Space
• An optical pointing system for the GLT • All-sky water vapour measurement • Current system needs upating. DTU Drone Center • People: Jørgensen et al.
• Arctic situational awareness • Remote sensing • Establish ancillary telescopes at summit Other possibilities - get in touch! • Space safety projects • People: Linden-Vørnle • Instrumentation: DTU Photonics • Construction: DTU Engineering The GLT is a great opportunity for Denmark and Greenland
Scientific interests Strategic national interests • Major partnership in a sub-mm • Research in the Artic / First telescope would be a game- observatory in the Arctic changer for Danish astronomy. • Geopolitics / national security • Danish participartion in the EHT consortium • Major educational and outreach potential in Denmark and Greenland • Instrumentation development • Strengthening ties between • Other (Ice, geodesy, remote Denmark and Greenland sensing, …)
A permanent astronomical Arctic Major grant observatory in Greenland with (15-20MDKK) Denmark as a major partner. The GLT is a great opportunity for Denmark
Email me if you are interested: [email protected]