Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Europeans unite to tap early universe for secrets of fundamental physics

26.05.2008
Aim to produce new generation of astronomer that understands theory and observation

The future of fundamental physics research lies in observing the early universe and developing models that explain the new data obtained.

The availability of much higher resolution data from closer to the start of the universe is creating the potential for further significant theoretical breakthroughs and progress resolving some of the most difficult and intractable questions in physics. But this requires much more interaction between astronomical theory and observation, and in particular the development of a new breed of astronomer who understands both.

This was the key conclusion from a recent workshop organised by the European Science Foundation (ESF), bringing together experts in cosmology, astrophysics and particle physics. "I think the realization of how important this is, and of how much needs to be done to get to that stage, will be the main long-term legacy of the workshop," noted Carlos Martins, convenor of the ESF workshop. "In particular, a lot of work needs to be done in order to provide a stronger 'theoretical underpinning' for future observational work. Ultimately this means that when training the next generation of researchers in this area, a lot more effort needs to be put into forming 'bilingual' researchers, that are fluent both in the language of observations and in that of theory."

In effect astronomy is returning to its roots, since the early great discoveries were made by the likes of Galileo for whom theory and observation were two sides of the same coin. The field subsequently split into two, with theorists and observers becoming divorced and ceasing to communicate effectively with each other. Now though the emergence of highly sophisticated observing platforms, capable of making different types of measurement depending on theoretical considerations, means that the two are once again becoming closely entwined.

Two key developments are the ability to take the observing instruments into space, where more accurate observations can be made beyond the influence of the earth's atmosphere and magnetic field, and availability of high precision atomic clocks for measurement of timing down to nanoseconds. At the same time it has become clear there is a limit to how much can be discovered in earth-bound laboratories, even those as big as the Large Hadron Particle Accelerator run by CERN, the European Organization for Nuclear Research, in Switzerland. The early universe on the other hand is a natural laboratory with the required scale and energy, providing the potential for probing deeper into fundamental processes relating to matter and energy. "The idea was to bring together the top European expertise in cosmology, astrophysics and particle physics, get the various sub-communities to be aware of what is being done 'elsewhere', and focus our efforts on using the early universe as a laboratory in which we can probe fundamental physics - in ways that we'll never be able to do if we restrict ourselves to laboratory tests," said Martins.

The workshop also discussed some of the fundamental questions that these new observations could help resolve, notably whether or not scalar fields exist across the whole the universe. Unlike say gravitational or magnetic fields, which have both strength and direction, scalar fields have strength alone, varying from point to point. They definitely exist within some closed systems, such as the temperature distribution within the earth's atmosphere, but it is not yet known whether they exist on the scale of the universe. As Martins pointed out, this is a vital question because the existence of scalar fields could help explain how the universe developed after the Big Bang and became as we observe it today. For example scalar fields could explain the existence of dark matter and energy, which can only be observed indirectly from their gravitational effects on the part of the universe we can see.

New observations could also help confirm aspects of current theories, such as the existence of gravitational waves as predicted by Einstein's General Relativity. Gravitational waves are supposed to be ripples through space time radiating outwards from a moving object. However the ripples are so small as to be very difficult to measure, with the only observational evidence so far coming from pulsars, which are very dense binary neutron stars revolving around each other. The revolution of pulsars appears to slow down in a manner consistent with the existence of gravitational waves causing them to lose energy, but further confirmation is needed.

Finally there is also the prospect of making further progress in the field of astronomy itself, for example by using space borne atomic clocks to calibrate advanced spectrographs that in turn will be used to search for "extra-solar" planets in neighbouring star systems.

Thomas Lau | alfa
Further information:
http://www.astro.up.pt/esf2008

More articles from Physics and Astronomy:

nachricht First Juno science results supported by University of Leicester's Jupiter 'forecast'
26.05.2017 | University of Leicester

nachricht Measured for the first time: Direction of light waves changed by quantum effect
24.05.2017 | Vienna University of Technology

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: Can the immune system be boosted against Staphylococcus aureus by delivery of messenger RNA?

Staphylococcus aureus is a feared pathogen (MRSA, multi-resistant S. aureus) due to frequent resistances against many antibiotics, especially in hospital infections. Researchers at the Paul-Ehrlich-Institut have identified immunological processes that prevent a successful immune response directed against the pathogenic agent. The delivery of bacterial proteins with RNA adjuvant or messenger RNA (mRNA) into immune cells allows the re-direction of the immune response towards an active defense against S. aureus. This could be of significant importance for the development of an effective vaccine. PLOS Pathogens has published these research results online on 25 May 2017.

Staphylococcus aureus (S. aureus) is a bacterium that colonizes by far more than half of the skin and the mucosa of adults, usually without causing infections....

Im Focus: A quantum walk of photons

Physicists from the University of Würzburg are capable of generating identical looking single light particles at the push of a button. Two new studies now demonstrate the potential this method holds.

The quantum computer has fuelled the imagination of scientists for decades: It is based on fundamentally different phenomena than a conventional computer....

Im Focus: Turmoil in sluggish electrons’ existence

An international team of physicists has monitored the scattering behaviour of electrons in a non-conducting material in real-time. Their insights could be beneficial for radiotherapy.

We can refer to electrons in non-conducting materials as ‘sluggish’. Typically, they remain fixed in a location, deep inside an atomic composite. It is hence...

Im Focus: Wafer-thin Magnetic Materials Developed for Future Quantum Technologies

Two-dimensional magnetic structures are regarded as a promising material for new types of data storage, since the magnetic properties of individual molecular building blocks can be investigated and modified. For the first time, researchers have now produced a wafer-thin ferrimagnet, in which molecules with different magnetic centers arrange themselves on a gold surface to form a checkerboard pattern. Scientists at the Swiss Nanoscience Institute at the University of Basel and the Paul Scherrer Institute published their findings in the journal Nature Communications.

Ferrimagnets are composed of two centers which are magnetized at different strengths and point in opposing directions. Two-dimensional, quasi-flat ferrimagnets...

Im Focus: World's thinnest hologram paves path to new 3-D world

Nano-hologram paves way for integration of 3-D holography into everyday electronics

An Australian-Chinese research team has created the world's thinnest hologram, paving the way towards the integration of 3D holography into everyday...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Marine Conservation: IASS Contributes to UN Ocean Conference in New York on 5-9 June

24.05.2017 | Event News

AWK Aachen Machine Tool Colloquium 2017: Internet of Production for Agile Enterprises

23.05.2017 | Event News

Dortmund MST Conference presents Individualized Healthcare Solutions with micro and nanotechnology

22.05.2017 | Event News

 
Latest News

How herpesviruses win the footrace against the immune system

26.05.2017 | Life Sciences

Water forms 'spine of hydration' around DNA, group finds

26.05.2017 | Life Sciences

First Juno science results supported by University of Leicester's Jupiter 'forecast'

26.05.2017 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>