Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

UA Astronomers Witness Asteroid Smashup

29.08.2014

Using data taken by NASA's Spitzer Space Telescope, astronomers at the University of Arizona have spotted an eruption of dust around a young star, possibly the result of a smashup between large asteroids. This type of collision can eventually lead to the formation of terrestrial planets.

A few months after scientists began tracking the star, called NGC 2547-ID8, it surged with a huge amount of fresh dust between August 2012 and January 2013. 

"We think two big asteroids crashed into each other, creating a huge cloud of grains the size of very fine sand, which are now smashing themselves into smithereens and slowly leaking away from the star," said Huan Meng, the study's lead author and a graduate student in the UA Department of Planetary Sciences

This is the first time scientists have collected data before and after a planetary system smashup. The viewing offers a glimpse into the violent process of making rocky planets like Earth. 

Rocky planets begin life as dusty material circling around young stars. The material clumps together to form asteroids that occasionally run into each other. Although the asteroids often are destroyed, some grow over time and transform into proto-planets. After about 100 million years, the objects mature into full-grown, terrestrial planets. 

In the new study, Spitzer – which includes technology developed at the UA – set its heat-seeking infrared eyes on the dusty star NGC 2547-ID8, which is a solar-type star that is about 35 million years old and and lies 1,200 light-years away in the Vela constellation. Beginning in May 2012, the telescope began watching the star, sometimes daily. 

A dramatic change in the star came during a time when Spitzer had to point away from NGC 2547-ID8 because the sun was in the way. When Spitzer started observing the star again five months later, team members were shocked by the data they received. 

"We not only witnessed what appears to be the wreckage of a huge smashup, but have been able to track how it is changing – the signal is fading as the cloud destroys itself by grinding its grains down so they escape from the star," said Kate Su, an associate astronomer at the UA Department of Astronomy and Steward Observatory and co-author on the study. 

"We are watching rocky planet formation happen right in front of us," said George Rieke, a UA Regents' Professor of Astronomy who led one of the instrument-developing teams on the Spitzer telescope project and a co-author on the study. "This is a unique chance to study this process in near real time." 

Since terrestrial planet formation is a messy process that takes more than tens of millions of years, scientists rely on computer simulations to understand the process. The observations reported here open an avenue to compare those simulations with how it happens in the real world, Rieke said. 

After Spitzer's expected end of operations later this decade, astronomers will catch a glimpse of the dust around these stars with the James Webb Space Telescope, or JWST, currently under construction and planned for launch in late 2018. JWST, too, will use technology developed at the UA to observe the most distant objects in the universe: a mid-infrared-wavelength camera developed by Rieke and a near-infrared-wavelength camera developed by Regents' Professor of Astronomy Marcia Rieke, his wife. 

"Combining work with both telescopes over 20 to 25 years will provide us with a detailed look at how planets like Earth are assembled," Su said. 

The results of this study are posted online on the website of the journal Science. 

Contacts:

George Rieke

520-621-2832

grieke@as.arizona.edu

Kate Su

520-621-3445

ksu@as.arizona.edu

For images, please contact:

Whitney Clavin

Jet Propulsion Laboratory

818-354-4673

whitney.clavin@jpl.nasa.gov

George Rieke | University of Arizona

Further reports about: Arizona Asteroid Astronomy JWST NGC Observatory Space Telescope Witness asteroids terrestrial

More articles from Physics and Astronomy:

nachricht Present-day measurements yield insights into clouds of the past
27.05.2016 | Paul Scherrer Institut (PSI)

nachricht NASA scientist suggests possible link between primordial black holes and dark matter
25.05.2016 | NASA/Goddard Space Flight Center

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: Worldwide Success of Tyrolean Wastewater Treatment Technology

A biological and energy-efficient process, developed and patented by the University of Innsbruck, converts nitrogen compounds in wastewater treatment facilities into harmless atmospheric nitrogen gas. This innovative technology is now being refined and marketed jointly with the United States’ DC Water and Sewer Authority (DC Water). The largest DEMON®-system in a wastewater treatment plant is currently being built in Washington, DC.

The DEMON®-system was developed and patented by the University of Innsbruck 11 years ago. Today this successful technology has been implemented in about 70...

Im Focus: Computational high-throughput screening finds hard magnets containing less rare earth elements

Permanent magnets are very important for technologies of the future like electromobility and renewable energy, and rare earth elements (REE) are necessary for their manufacture. The Fraunhofer Institute for Mechanics of Materials IWM in Freiburg, Germany, has now succeeded in identifying promising approaches and materials for new permanent magnets through use of an in-house simulation process based on high-throughput screening (HTS). The team was able to improve magnetic properties this way and at the same time replaced REE with elements that are less expensive and readily available. The results were published in the online technical journal “Scientific Reports”.

The starting point for IWM researchers Wolfgang Körner, Georg Krugel, and Christian Elsässer was a neodymium-iron-nitrogen compound based on a type of...

Im Focus: Atomic precision: technologies for the next-but-one generation of microchips

In the Beyond EUV project, the Fraunhofer Institutes for Laser Technology ILT in Aachen and for Applied Optics and Precision Engineering IOF in Jena are developing key technologies for the manufacture of a new generation of microchips using EUV radiation at a wavelength of 6.7 nm. The resulting structures are barely thicker than single atoms, and they make it possible to produce extremely integrated circuits for such items as wearables or mind-controlled prosthetic limbs.

In 1965 Gordon Moore formulated the law that came to be named after him, which states that the complexity of integrated circuits doubles every one to two...

Im Focus: Researchers demonstrate size quantization of Dirac fermions in graphene

Characterization of high-quality material reveals important details relevant to next generation nanoelectronic devices

Quantum mechanics is the field of physics governing the behavior of things on atomic scales, where things work very differently from our everyday world.

Im Focus: Graphene: A quantum of current

When current comes in discrete packages: Viennese scientists unravel the quantum properties of the carbon material graphene

In 2010 the Nobel Prize in physics was awarded for the discovery of the exceptional material graphene, which consists of a single layer of carbon atoms...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Networking 4.0: International Laser Technology Congress AKL’16 Shows New Ways of Cooperations

24.05.2016 | Event News

Challenges of rural labor markets

20.05.2016 | Event News

International expert meeting “Health Business Connect” in France

19.05.2016 | Event News

 
Latest News

11 million Euros for research into magnetic field sensors for medical diagnostics

27.05.2016 | Awards Funding

Fungi – a promising source of chemical diversity

27.05.2016 | Life Sciences

New Model of T Cell Activation

27.05.2016 | Life Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>