12-Billion-Year-Old Cosmic Cinders Sighted 100 Light Years from Earth
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April 12, 2012

12-Billion-Year-Old Cosmic Cinders Sighted 100 Light Years from Earth

 

          Wd_10

A team of astronomers have identified two 11- to 12-billion-year-old white dwarf stars only 100 light years away from Earth. These stars are the closest known examples of the oldest stars in the Universe forming soon after the Big Bang. Known as WD 0346+246 and SDSS J110217, 48+411315.4 (J1102), these stars are located in the constellations Taurus and Ursa Major.

"A white dwarf is like a hot stove," said Mukremin Kilic, assistant professor of physics and astronomy in the University of Oklahoma. "once the stove is off, it cools slowly over time. By measuring how cool the stove is, we can tell how long it has been off. The two stars we identified have been cooling for billions of years."

Kilic explained that white dwarf stars are the burned out cores of stars similar to the Sun. In about five billion years, the Sun also will burn out and turn into a white dwarf star. It will lose its outer layers as it dies and turn into an incredibly dense star the size of Earth.

Kilic and colleagues obtained infrared images using NASA's Spitzer Space Telescope to measure the temperature of the stars. Over a three-year period, they measured J1102's distance by tracking its motion using the MDM Observatory's 2.4m telescope near Tucson, Arizona.

"Most stars stay almost perfectly fixed in the sky, but J1102 is moving at a speed of 600,000 miles per hour and is a little more than 100 light years from Earth," remarks co-author John Thorstensen of Dartmouth College. "We found its distance by measuring a tiny wiggle in its path caused by the Earth's motion -- it's the size of a dime viewed from 80 miles away."

"Based on the optical and infrared observations of these stars and our analysis, these stars are about 3700 and 3800 degrees on the surface," said co-author Piotr Kowalski of Helmholtz Centre Potsdam in Germany. Kowalski modeled the atmospheric parameters of these stars.

Based on these temperature measurements, Kilic and his colleagues were able to estimate the ages of the stars. "It is like a crime scene investigation," added Kilic. "We measure the temperature of the dead body -- in our case a dead star, then determine the time of the crime. These two white dwarf stars have been dead and cooling off almost for the entire history of the Universe."

The Daily Galaxy via University of Oklahoma

Image credit: http://chandra.harvard.edu/resources/illustrations/whitedwarfs.html

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Comments

The age of the universe is being determined by the big-bang theory, based on the oldest coldest stars detected. Most likely dead stars near absolute zero emit no radiation and explain away phony dark matter galaxy halos. Most stars in our local universe probably died over 200 billion years ago, and are impossible to detect. It would be an impossible coincidence that both the coolest temp and oldest stars found are only 100 light years away, indicating the big-bang must be discarded.
See this new feature story at
http://holographicgalaxy.blogspot.com

"Most likely dead stars near absolute zero emit no radiation and explain away phony dark matter galaxy halos"

There are regions of space where the gravitation lensing is as bad as a large galaxy, yet it is so clear, not even gas clouds are detected. Something is there, something huge, and it's not at a single point of mass, but spread around.

It is VERY massive, it is spread over many many light years, and it does not block or radiate on any radio frequency.

Your theory does not explain this.

just ignore holo. he's one of the resident crackpots and runs a very confusing website

Dark matter is phony. Abell 520 has far to few galaxies to have a dark matter core. Metamaterials and Electromagnetism are actual analogues that mimic and model phony black holes and dark matter. The grav lens is merely the space warping and bending of light that metamaterials like common carbon graphenes do in labs. What you say is "clear dark matter" are where the invisible magnetic field lines intersect, along with electromagnetic interactions of moving charged particles that produce electric currents and magnetic fields. Evweybody knows that stars and entire galaxies are over 99.9% plasma, which forms cosmic filaments observed over 3 billion light years long along the sloan great wall supercluster. Filaments are confined by magnetic fields, and only a very minute difference in charges from neutral have very profound effects. Never has a single gravity wave nor graviton particle been detected nor observed. Without knowing seeing gravity, how can they invent their own dark matter to have more, solely to explain flat spiral plasma gas dust galaxy shapes by gravity, rather than obvious electromagnetic forces. Sure, they accept credible magnetohydrodynamics equations from which they steal and misrepresent their gravity equations with, but misrepresent the truth and source is electromagnetism, not gravity.

Great new cosmology stories with Great ART PHOTOS with Every story.
See the most recent pub about these 2 new old stars at the homepage at Holographicgalaxy.blogspot.com

I like stars. They twinkle and make me so happy inside.

That's awesome Holo! You seem like the right sort of person to ask, so can you explain Time Cubes to me?


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