Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

The Search for the First Stars

01.03.2012
Recently, astronomers found two immense clouds of pristine gas, nearly 12 billion light years away – clouds that astronomers suspect are the stuff from which the first stars were born.

The Kavli Foundation spoke with three prominent researchers about this and other exciting findings that are moving scientists closer to understanding how the first stars and galaxies formed. This includes the realization that in early times, there were many more small, feeble galaxies than large luminous galaxies.

“If you were to take a space ship and go back to that point in cosmic time, you'd find that the sky is really ablaze with them – so many of them that their combined output is very significant,” said Richard Ellis, Steele Professor of Astronomy at the California Institute of Technology. “These early objects are in fact very, very small – about a tenth the diameter of the Milky Way. And yet, they are forming stars more prodigiously than the galaxy we live in today.”

Discoveries such as these come as scientists focus on studying the gaseous “fingerprints” the early galaxies left on their surroundings – what’s called the intergalactic medium (IGM). “We know from these observations that after about one billion years all of this gas is ionized, and it's the galaxies that we think did this,” said George Becker, Fellow, the Kavli Institute for Cosmology at the University of Cambridge. “The question that we are trying to answer is how and when it happened, and what these earliest galaxies were like.”

Said Avi Loeb, Chair of the Department of Astronomy and Director of the Institute for Theory and Computation, Harvard University, “If we can map the distribution of galaxies and the hydrogen gas between them, in the IGM, we can see the relationship between the places where the galaxies are and the regions that were ionized… [This] gives us indirect evidence for the earliest galaxies. This new technique will enable us to directly study the galaxies that ionized that hydrogen gas.”

And what do researchers ultimately hope to uncover?

“[We] would like to understand how the galaxies that we see around us, including the Milky Way, came into existence,” said Loeb. “It's going back in time to our origins, in a sense. Religious texts try to address these questions, but now we are able to come up with a scientific version of the story of Genesis.”

For the full discussion visit: http://www.kavlifoundation.org/science-spotlights/searching-first-stars

James Cohen | Newswise Science News
Further information:
http://www.kavlifoundation.org

Further reports about: Astronomy IgM Milky Way Semantic Search Engine hydrogen gas

More articles from Physics and Astronomy:

nachricht Temperature-controlled fiber-optic light source with liquid core
20.06.2018 | Leibniz-Institut für Photonische Technologien e. V.

nachricht New material for splitting water
19.06.2018 | American Institute of Physics

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: Temperature-controlled fiber-optic light source with liquid core

In a recent publication in the renowned journal Optica, scientists of Leibniz-Institute of Photonic Technology (Leibniz IPHT) in Jena showed that they can accurately control the optical properties of liquid-core fiber lasers and therefore their spectral band width by temperature and pressure tuning.

Already last year, the researchers provided experimental proof of a new dynamic of hybrid solitons– temporally and spectrally stationary light waves resulting...

Im Focus: Overdosing on Calcium

Nano crystals impact stem cell fate during bone formation

Scientists from the University of Freiburg and the University of Basel identified a master regulator for bone regeneration. Prasad Shastri, Professor of...

Im Focus: AchemAsia 2019 will take place in Shanghai

Moving into its fourth decade, AchemAsia is setting out for new horizons: The International Expo and Innovation Forum for Sustainable Chemical Production will take place from 21-23 May 2019 in Shanghai, China. With an updated event profile, the eleventh edition focusses on topics that are especially relevant for the Chinese process industry, putting a strong emphasis on sustainability and innovation.

Founded in 1989 as a spin-off of ACHEMA to cater to the needs of China’s then developing industry, AchemAsia has since grown into a platform where the latest...

Im Focus: First real-time test of Li-Fi utilization for the industrial Internet of Things

The BMBF-funded OWICELLS project was successfully completed with a final presentation at the BMW plant in Munich. The presentation demonstrated a Li-Fi communication with a mobile robot, while the robot carried out usual production processes (welding, moving and testing parts) in a 5x5m² production cell. The robust, optical wireless transmission is based on spatial diversity; in other words, data is sent and received simultaneously by several LEDs and several photodiodes. The system can transmit data at more than 100 Mbit/s and five milliseconds latency.

Modern production technologies in the automobile industry must become more flexible in order to fulfil individual customer requirements.

Im Focus: Sharp images with flexible fibers

An international team of scientists has discovered a new way to transfer image information through multimodal fibers with almost no distortion - even if the fiber is bent. The results of the study, to which scientist from the Leibniz-Institute of Photonic Technology Jena (Leibniz IPHT) contributed, were published on 6thJune in the highly-cited journal Physical Review Letters.

Endoscopes allow doctors to see into a patient’s body like through a keyhole. Typically, the images are transmitted via a bundle of several hundreds of optical...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Munich conference on asteroid detection, tracking and defense

13.06.2018 | Event News

2nd International Baltic Earth Conference in Denmark: “The Baltic Sea region in Transition”

08.06.2018 | Event News

ISEKI_Food 2018: Conference with Holistic View of Food Production

05.06.2018 | Event News

 
Latest News

What are the effects of coral reef marine protected areas?

21.06.2018 | Life Sciences

The Janus head of the South Asian monsoon

21.06.2018 | Earth Sciences

The world's tiniest first responders

21.06.2018 | Life Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>