Long time ago, in galaxy far away, the first stars Universe. The item may refer to “hypothetical” cases, but at least this time the subject is known. This is about galaxy HD1, the most distant (and oldest) astronomical object ever observed. Lady HD1 appeared “only” 300 million years after big Bang.

Galaxy HD1 was home to Population 3 stars

Discovery (or observation?) galaxy HD1 this is very curious. Scientists first Harvard-Smithsonian Center for Astrophysics thought it was starburst galaxy, the name given to galaxies that produce stars. However, when analyzing the number of “fabricated” stars, the team led by Fabio Pacucci, co-author of the study, realized that HD1 produced 100 stars a year, ten times more than expected for star formation.

“The first population of stars that formed in the universe were more massive, brighter and hotter than modern stars,” explains Pacucci. “If we assume that the stars formed on HD1 are these first stars or Population III then the properties are easier to explain. Actually, Population Stars III capable of emitting more ultraviolet light than ordinary stars, which explains the extreme ultraviolet luminosity HD1” concludes Pacucci.

Distance from Galaxy HD1 to modern galaxies and proximity to the start of the Big Bang. Source: Harikane et al., NASA, EST and P. Oesch/Yale.

AT population III stars so called the first stars of the universe. Predicted by the theory of cosmology, such a star has not been observed before. However, the article still needs peer review to confirm that galaxy HD1 emits ultraviolet radiation Population Stars III. There is also the possibility Black hole supermassive be responsible for issuing UV radiation.

The scientists spent more than 1,200 hours of observations with the Subaru, VISTA, UK Infrared and Spitzer telescopes. soon, James Webb telescope will be used to supplement the study galaxy HD1.

US astronaut confirms return with Russian spacecraft
Mark Vande Hey holds the record for the longest stay in space and will return to Earth tomorrow

…..

Thinking about buying goods online? Discover the Save the Connected World extension for Google Chrome. It’s free and offers you price comparisons at major stores and coupons so you can always buy at the best price. Download now.

Source: Harvard.