Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:


ESF helps Europe play lead role in new age of astronomical discovery

Astronomy is entering a new golden age of discovery led by breakthroughs in telescopes and instruments making them capable of observing distant events early in the life of the universe. There is now great optimism that one of the fundamental questions of cosmology, the origin of galaxies, will be resolved within the next decade or sooner. But the technology involved is expensive, for instruments have to be highly sensitive and some of the observation needs to take place from space beyond the interference of the earth’s atmosphere, so an international effort is involved.

Europe is playing a key role in this global programme with three new instruments, including the €1 billion Herchel Space Observatory (HSO), and the European Science Foundation (ESF) has been helping to coordinate the effort by bringing many of the principle users of these facilities together at an international conference. Delegates included leading specialists in all aspects of galaxy and star formation.

Galaxies are formed when areas of dust and gas collapse under gravity, forming clumps within which densities become sufficient to trigger the nuclear fusion required for star formation. But the devil is in the detail, and this has been obscured from optical telescopes by clouds of dust that absorb visible light. However the dust re-emits this visible light absorbed from galaxies at longer wavelengths, and the latest telescopes are now able to detect this at sufficient sensitivity to unravel the processes being observed, as Eelco van Kampen, chair of the ESF Research Conference The Origin of Galaxies: Exploring Galaxy Evolution with the New Generation of Infrared-Millimeter Facilities, pointed out. “The main reason for a new golden age is the sheer number of new instruments that will become available over the next few years, literally opening up the universe in the far-infrared to millimeter wavelengths,” said van Kampen.

It is not just that galaxy formation can now be observed indirectly via the radiation emitted from the dust that obscures a direct view, but the new telescopes are also able to span a much broader spectrum of wavelengths. This is crucial for understanding what is happening, because many processes, and also individual chemical elements, only reveal themselves via the radiation they emit across multiple wavelengths, rather than their intensity at a particular point of the spectrum, or single “colour”. “The main gain is that the whole 'spectral energy distribution' (SED for short) can be mapped for each source, which means that one does not only measure total luminosity, but also 'colours' and emission from specific molecules,” said van Kampen. “From the SED one can derive many properties of the sources, including temperatures and composition.”

Although there is great confidence that dramatic progress will be made, there is uncertainty over the exact nature of the discoveries to come, creating eager anticipation among astronomers. “There will be many surprises, as this is still a relatively uncharted wavelength range,” said van Kampen. “It is hard to predict whether surprises will be on the same scale as those in gamma-rays, where many short-lived bursts appeared quite unexpectedly, but there is great potential for the unexpected!” Gamma ray bursts lasting a split second are caused by the most powerful explosions known, and provided evidence of black holes – objects whose gravity is so intense that even light does not travel fast enough to escape.

For European researchers, there is an additional aspect to the challenge – all the observations from the crucial HSO telescope have to be made within about three years before the equipment runs out of its vital helium cooling fluid, which cannot practically be replenished. The telescope has to be kept cool to avoid emitting infra red radiation from its own fabric, which would swamp the faint signals from distant dust clouds. “The Herschel Space Telescope has to be cooled significantly to reduce background noise, and for this purpose will be housed in a superfluid helium cryostat,” said van Kampen. “The need for cooling means that the telescope lifetime is limited by its helium supply. We are promised at least 3 years of routine operations, but this could be somewhat longer if we are lucky.”

Apart from the HSO, Europe is contributing to two other instruments to the international galaxy observing effort: SCUBA-2, which is a wide field camera for the James Clerk Maxwell Telescope (JCMT) on Mauna Kea, Hawaii, and the Atacama Large Millimetre Array (ALMA) 16400 feet up in the Chilean Andes.

The conference, which was one of the series of research conferences organised by the ESF Research Conferences Scheme, was held at Universitätszentrum Obergurgl near Innsbruck in Austria, from 24-29 March 2007. This event was organised by the ESF in partnership with the Fonds zur Förderung der wissenschaftlichen Forschung in Österreich (FWF) and the Leopold-Franzens-Universität Innsbruck (LFUI).

The European Science Foundation is based in Strasbourg, France, see The ESF is an association of 75 member organisations from 30 European countries. Since its inception in 1974, it has co-ordinated a wide range of pan-European scientific initiatives.

More information:

Thomas Lau | alfa
Further information:

More articles from Physics and Astronomy:

nachricht Scientists discover particles similar to Majorana fermions
25.10.2016 | Chinese Academy of Sciences Headquarters

nachricht Light-driven atomic rotations excite magnetic waves
24.10.2016 | Max-Planck-Institut für Struktur und Dynamik der Materie

All articles from Physics and Astronomy >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Etching Microstructures with Lasers

Ultrafast lasers have introduced new possibilities in engraving ultrafine structures, and scientists are now also investigating how to use them to etch microstructures into thin glass. There are possible applications in analytics (lab on a chip) and especially in electronics and the consumer sector, where great interest has been shown.

This new method was born of a surprising phenomenon: irradiating glass in a particular way with an ultrafast laser has the effect of making the glass up to a...

Im Focus: Light-driven atomic rotations excite magnetic waves

Terahertz excitation of selected crystal vibrations leads to an effective magnetic field that drives coherent spin motion

Controlling functional properties by light is one of the grand goals in modern condensed matter physics and materials science. A new study now demonstrates how...

Im Focus: New 3-D wiring technique brings scalable quantum computers closer to reality

Researchers from the Institute for Quantum Computing (IQC) at the University of Waterloo led the development of a new extensible wiring technique capable of controlling superconducting quantum bits, representing a significant step towards to the realization of a scalable quantum computer.

"The quantum socket is a wiring method that uses three-dimensional wires based on spring-loaded pins to address individual qubits," said Jeremy Béjanin, a PhD...

Im Focus: Scientists develop a semiconductor nanocomposite material that moves in response to light

In a paper in Scientific Reports, a research team at Worcester Polytechnic Institute describes a novel light-activated phenomenon that could become the basis for applications as diverse as microscopic robotic grippers and more efficient solar cells.

A research team at Worcester Polytechnic Institute (WPI) has developed a revolutionary, light-activated semiconductor nanocomposite material that can be used...

Im Focus: Diamonds aren't forever: Sandia, Harvard team create first quantum computer bridge

By forcefully embedding two silicon atoms in a diamond matrix, Sandia researchers have demonstrated for the first time on a single chip all the components needed to create a quantum bridge to link quantum computers together.

"People have already built small quantum computers," says Sandia researcher Ryan Camacho. "Maybe the first useful one won't be a single giant quantum computer...

All Focus news of the innovation-report >>>



Event News

#IC2S2: When Social Science meets Computer Science - GESIS will host the IC2S2 conference 2017

14.10.2016 | Event News

Agricultural Trade Developments and Potentials in Central Asia and the South Caucasus

14.10.2016 | Event News

World Health Summit – Day Three: A Call to Action

12.10.2016 | Event News

Latest News

Ice shelf vibrations cause unusual waves in Antarctic atmosphere

25.10.2016 | Earth Sciences

Fluorescent holography: Upending the world of biological imaging

25.10.2016 | Power and Electrical Engineering

Etching Microstructures with Lasers

25.10.2016 | Process Engineering

More VideoLinks >>>