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Latest Asteroseismology Stories

Measuring Stellar Gravity
2013-08-23 08:58:22

[ Watch The Video: Star Flickering Discovery ] John P. Millis, PhD for redOrbit.com - Your Universe Online A star’s gravitational strength is key in understanding and modeling other properties of a particular star, to say nothing of understanding the planets that orbit around it. But making accurate measurements of a star’s surface gravity is difficult, and measurements are often only good to within about a 50% estimation of the actual value, sometimes worse. Now, however,...

Image 1 - The Turbulent Lives Of Stars
2011-09-16 07:43:58

  The stars are boiling! The reason is the energy generated in the center of the star that wants to escape. If this does not happen quickly enough, the star starts to ℠boil´ in the outer layers causing vibrations that result in light variations, like in the Sun. Such oscillations have now been discovered by Victoria Antoci and collaborators using the NASA spacecraft Kepler, but in a much hotter star. The scientists publish this in the most recent issue of...

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2011-04-14 08:08:36

Michele Johnson, Public Affairs Officer, Kepler Mission, Ames Research Center, Moffett Field, Calif. We are entering a golden era for "stellar physics" "“ a term coined to describe research about the formation, evolution, interior and the atmospheres of stars. Thanks to a partnership forged among stellar astrophysics, scientists and NASA's Kepler Mission, a goldmine of data is now available to support the world's efforts to detect planets in the habitable zone around other stars. The...

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2011-04-08 09:00:46

NASA's Kepler Mission has detected changes in brightness in 500 sun-like stars, giving astronomers a much better idea about the nature and evolution of the stars.Prior to Kepler's launch in March 2009, astronomers had identified the changes in brightness, or oscillations, of about 25 stars similar to our sun in size, age, composition and location within the Milky Way galaxy.The discoveries are reported in a paper, "Ensemble Asteroseismology of Solar-Type Stars with the NASA Kepler Mission,"...

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2011-02-21 05:50:00

Bill Chaplin from the University of Birmingham, speaking at the American Association for the Advancement of Science (AAAS) conference in Washington, said that the Kepler space telescope was an exquisite tool for what is called "astroseismology", measuring the sizes and ages of stars. The Kepler telescope measures five times better than any other means as it "listens" to the sounds they make. The technique, used to measure some 500 far-flung stars, measures minuscule variations in a...

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2010-10-26 11:20:00

An international cadre of scientists that used data from NASA's Kepler spacecraft announced Tuesday the detection of stellar oscillations, or "starquakes," that yield new insights about the size, age and evolution of stars. The results were presented at a news conference at Aarhus University in Denmark by scientists representing the Kepler Asteroseismic Science Consortium (KASC). The team studied thousands of stars observed by Kepler, releasing what amounts to a roster of some of humanity's...

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2010-08-27 09:09:44

Star known as HD49933 is located 100 light years away from Earth In a bid to unlock long-standing mysteries of the sun, including the impacts on Earth of its 11-year cycle, an international team of scientists has successfully probed a distant star. By monitoring the star's sound waves, the team has observed a magnetic cycle analogous to the sun's solar cycle. Results of the study, conducted by scientists at the U.S. National Center for Atmospheric Research (NCAR) in Boulder, Colo., and...

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2010-08-26 23:29:27

In a bid to unlock longstanding mysteries of the Sun, including the impacts on Earth of its 11-year cycle, an international team of scientists has successfully probed a distant star. By monitoring the star's sound waves, the team has observed a magnetic cycle analogous to the Sun's solar cycle.The study, conducted by scientists at the National Center for Atmospheric Research (NCAR) and colleagues in France and Spain, is being published this week as a "Brevia" in Science.The scientists studied...

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2010-06-14 08:00:00

By detecting the faint dimming in the light emitted by stars during a transit event, CoRoT has detected six new exoplanets - each with its own peculiar characteristics - and one brown dwarf. One of these exoplanets, designated CoRoT-11b, has twice the mass of Jupiter and orbits a rapidly rotating star; this type of star is an extremely difficult target for exoplanet searches and its detection marks a significant achievement for the CoRoT team. In order to detect planets orbiting other suns,...

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2009-10-22 09:50:00

This week, Astronomy & Astrophysics is publishing a special issue devoted to the early results obtained with the CoRoT space mission. It includes 55 articles dealing with the primary goals of the CoRoT mission, that is, exoplanet hunting and asteroseismology, and also with other topics in stellar physics. Astronomy & Astrophysics is publishing a special issue this week dedicated to the early results of the CoRoT space mission [1]. The CoRoT (Convection, Rotation & planetary...


Word of the Day
jument
  • A beast of burden; also, a beast in general.
'Jument' ultimately comes from the Latin 'jugum,' yoke.
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