Daily non-political popular news in brief.
With computers, astronomers show predicted present day distribution of elusive first stars
12-11-2006 · EurekAlert!With the help of enormous computer simulations, astronomers have now shown that the first generation of stars -- which have never been observed by scientists -- should be distributed evenly throughout our galaxy, deepening the long-standing mystery about these missing stellar ancestors. The results are published in this week's issue of the Astrophysical Journal.
Read more »
Keywords: computers, astronomers, show, predicted, present, day, distribution, elusive, stars, computer, astronomer, star
« Previous | Next »
Similar news on "With computers, astronomers show predicted present day distribution of elusive first stars":
- Chandra discovers cosmic cannonball
11-28-2007 · EurekAlert!
One of the fastest moving stars ever seen has been discovered with NASA's Chandra X-ray Observatory. This cosmic cannonball is challenging theories to explain its blistering speed.Astronomers used Chandra to observe a neutron star, known as RX J0822-4300, over a period of about five years. During that span, three Chandra observations clearly show the neutron star moving away from the center of the Puppis A supernova remnant at over 3 million miles per hour.
Similar news · Read more »
- Stellar tiramisu
07-07-2007 · EurekAlert!
Looking at the chemical composition of stars that host planets, astronomers have found that while dwarf stars often show iron enrichment on their surface, giant stars do not. The astronomers think that the planetary debris falling onto the outer layer of the star produces a detectable effect in a dwarf star, but this pollution is diluted by the giant star and mixed into its interior.
Similar news · Read more »
- UBC astronomers discover how white dwarf stars get their 'kicks'
12-04-2007 · EurekAlert!
University of British Columbia astronomer Harvey Richer and UBC graduate student Saul Davis have discovered that white dwarf stars are born with a natal kick, explaining why these smoldering embers of sun-like stars are found on the edge rather than at the center of globular star clusters.
Similar news · Read more »
- Neutron stars can be more massive, while black holes are more rare, Arecibo Observatory finds
01-14-2008 · EurekAlert!
Neutron stars can be considerably more massive than previously believed, and it is more difficult to form black holes, according to new research developed by using the Arecibo Observatory in Arecibo, Puerto Rico. Paulo Freire, an astronomer from the observatory, will present his research at the American Astronomical Society national meeting in Austin on Jan. 11.
Similar news · Read more »
- Hubble yields direct proof of stellar sorting in a globular cluster
10-24-2006 · EurekAlert!
A seven-year study with the NASA/ESA Hubble Space Telescope has provided astronomers with the best observational evidence yet that globular clusters sort out stars according to their mass. Heavier stars slow down and sink to the cluster's core, while lighter stars pick up speed and move across the cluster to its periphery. This process, called "mass segregation," has long been suspected for globular star clusters, but has never before been directly seen in action.
Similar news · Read more »
- Astronomers find triple interactions of supermassive black holes to be common in early universe
01-08-2007 · EurekAlert!
New cosmological computer simulations produced by a team of astronomers from Northwestern University, Harvard University and the University of Michigan show for the first time that supermassive black holes, which exist at the centers of nearly all galaxies, often come together during triple galaxy interactions. The theoretical results are of special interest because of the recent discovery by astronomers at the California Institute of Technology of a possible triple quasar.
Similar news · Read more »
- Heaviest stellar black hole discovered in nearby galaxy
10-17-2007 · EurekAlert!
Astronomers have located an exceptionally massive black hole in orbit around a huge companion star. By combining data from NASA's Chandra X-ray Observatory and the Gemini telescope on Mauna Kea, Hawaii, M33 X-7 was determined to be the most massive stellar black hole known. This result has intriguing implications for the evolution and ultimate fate of massive stars.
Similar news · Read more »
- Light echoes whisper the distance to a star
02-10-2008 · EurekAlert!
Taking advantage of the presence of light echoes, a team of astronomers have used an ESO telescope to measure, at the 1 percent precision level, the distance of a Cepheid -- a class of variable stars that constitutes one of the first steps in the cosmic distance ladder.
Similar news · Read more »
- UD researchers race ahead with latest spintronics achievement
10-26-2007 · EurekAlert!
In a rapid follow-up to their achievement as the first to demonstrate how an electron's spin can be electrically injected, controlled and detected in silicon, electrical engineers from the University of Delaware and Cambridge NanoTech now show that this quantum property can be transported a marathon distance in the world of microelectronics -- through an entire silicon wafer. The finding confirms that silicon -- the workhorse material of present-day electronics -- now can be harnessed up for new-age spintronics applications.
Similar news · Read more »
- Rethinking last century's closest, brightest supernova
01-09-2007 · EurekAlert!
February 2007 marks the 20th anniversary of the nearest and brightest supernova humans have seen in 400 years. Called SN1987A, it burned for weeks in the Large Magellanic Cloud, and provided astronomers with new information that forced them to rethink theories of how massive stars explode. Now UC Berkeley astronomer Nathan Smith says that theory needs rethinking again. Exploding stars like SN1987A may have been luminous blue variables, not blue supergiants.
Similar news · Read more »
