Exploring the Life Cycle of Galactic Matter from the Bottom of the World

Antarctica's newest far-infrared observatory is now in operation at Ridge A, the highest, driest, calmest place on the ice plateau. Established in a collaboration between the University of Arizona (US) and the University of New South Wales (Australia) the exceptional site is dedicated to international astronomical exploration. Building on the legacy of the AST/RO and Herschel observatories, the 60 cm HEAT telescope is constructing spectroscopic maps of the Milky Way in frequency bands from 0.5 to 2 THz (600 to 150 microns wavelength), where the extremely cold and dry conditions of the Antarctic plateau provide an exceptionally clear view. The HEAT telescope is exploring star forming regions, some of the most important yet enigmatic regions in our Galaxy, and aims to solve the mystery of how interstellar clouds are formed and evolve. The maps that HEAT constructs provide broad context (essentially "finding charts") for large facilities like ALMA, CCAT, and SOFIA and represent some of the newest, most comprehensive views of interstellar matter in our Milky Way Galaxy. Learn more...

A Robotic Observatory at the Coldest Place on Earth

The HEAT telescope is combined with the Australian PLATeau Observatory (PLATO-R), analogous to a "spacecraft bus", from which HEAT derives power and communications. The combination of HEAT and PLATO-R were first installed at Ridge A in January 2012; they comprise a robotic observatory that bears closest resemblence to a satellite observatory: it must operate in a remote, extreme environment without direct human contact for a year at a time. A cube of solar panels provide up to 1 kilowatt of power during the summer, and two small diesel generators provide redundant power during the long winter night. Two Iridium modems using USAP DoD SIM cards provide 24/7 contact with PLATO-R and HEAT and allow uplinking of commands and downloading of instrument telemetry and science data. Learn more...

Ridge A: Where the Stratosphere Goes all the way to the Ground

The Ridge A site was selected from satellite data to be the best location for an astronomical observatory on the Antarctic plateau, and indeed, anywhere on Earth. Located at the summit of the ice plateau at a physical elevation of 13,260' (4040 m) with a typical pressure altitude of 15,200' (4650 m), it lies at the origin of the continent's famous katabatic winds and is perhaps the calmest place on Earth, with typical winds of 4 knots (2 m/s). Even more important for infrared and terahertz telescopes is the extreme cold. Winter temperatures that routinely drop below -100F (-70C) provide for a very dry, stable, clear atmosphere. The extremely low amount of water vapor that results allows observations to be routinely performed here that cannot be done reliably anywhere else on Earth. Learn more...

Constructing a 3D Map of our Milky Way Galaxy

The HEAT telescope is exploiting the exceptional weather at Ridge A to construct a spectroscopic map of the Milky Way at terahertz frequencies (far-infrared wavelengths), where the critical spectral emission features of the dominant forms of carbon are located (carbon atoms at 492 and 809 GHz, carbon ions at 1900 GHz, and the prominent carbon-bearing molecule CO, seen at regularly-spaced intervals starting at 115 GHz). HEAT will construct a carbon map of the Southern Milky Way, and make the first ground-based measurements of ionized carbon, the dominant spectral line in the Milky Way, which can otherwise only be observed from airborne or space observatories. By seeing carbon cycling through all of its principal forms, we will follow the full life cycle of interstellar material and witness for the first time molecular clouds being born, evolving, forming stars, and dissolving, in a Galactic context. Learn more...

All of HEAT's images, spectra, and atmospheric measurements are available to anyone online! Our first preliminary data release (DR0) was online in March 2013 and the first major data release (DR1) was released in May 2014. Learn more...

The Collaboration

Funding for the HEAT telescope has been provided by the National Science Foundation's Office of Polar Programs under grant ANT-0944335, with logistics from the United States Antarctic Program. The HEAT telescope and PLATO-R are managed at the University of Arizona and the University of New South Wales, respectively.

HEAT and PLATO-R at Ridge A

HEAT and PLATO installed at Ridge A, 23 January 2012

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Latest News (2015)

  • 29 Jul - 1 August: We are proud to introduce the second major data release (DR2) from the HEAT telescope! Once fully uploaded, this will represent data taken with the telescope from 2012 through 2014.
  • 11 July: We've had a spectacular month of weather at Ridge A, with a best quartile PWV of 0.063 mm ... a mere 63 microns! This is a factor of 20-40 times drier than most excellent midlatitude sites and about 300-600 times drier than the atmosphere over most of the continental US right now.

Current Status and Weather

UTC Date : 18h on 3 November 2020
(11 PM local Ridge A time)
1m air Temperature : -55C (-67F)
1m winds (est'd) : CALM
Atm. Pressure : 568 mbar
Altimeter setting : 27.90 in Hg
Pressure altitude : 4620 meters (15,200 ft)
Precip. water / wx : 0.13 mm SKC

Click for a larger webcam montage

Live! from Ridge A...