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The spectacular moment universe's newest and youngest star 'was born' ... about 800 light-years or more than 4700 trillion miles away from the Milky Way. This is at the limit between brown dwarfs and red dwarfs. Receive news and offers from our other brands? Bulletin of the American Astronomical Society, "The Record Breaking Magnetic White Dwarf RE J0317-853", Burleigh, M. R.; Jordan, S., Vol. István Dékány (Pontifical Catholic University of Chile) and colleagues found the plane when they discovered 35 Cepheid variable stars, each no older than 100 million years. They form a very thin disk with a typical height only 70 light-years tall that penetrates the bulge to span the entire galactic plane.
Live Science is part of Future US Inc, an international media group and leading digital publisher. “That the stars in the bulge are mostly old just reflects that these stars are stars of the disk that formed a long time ago,” says Ness, “but this certainly does not prohibit new star formation.”, Paola Di Matteo (Observatory of Paris, France) adds that the discovery of young stars in the galactic midplane is yet another indication that galaxy mergers played little role in shaping the Milky Way's bulge: “This is another strong indication of the fact that our bulge has been mainly, if not entirely, formed via disk evolution and instabilities.”, By: The Editors of Sky & Telescope Martinez-Valpuesta & others, Astrophysical Journal 2006, NASA to Conduct Environmental Impact Statement for Mauna Kea. But there are two types of Cepheids: Type I Cepheids tip the scale at between 4 and 20 times the mass of the Sun, and shine with luminosities up to 100,000 times the Sun’s; Type II’s are relative lightweights, typically half the Sun’s mass and much older than their cousins.
So in other words, deep within the aging bulge, some process is forming brand-new stars.
Before Proxima, the title had been held by Alpha Centauri A&B. November 6, 2015
Several candidates exist which have a higher mass, however their mass has been measured by less precise methods and as such their mass value is regarded as less certain. 0, Yes, I would like to receive emails from Sky & Telescope. Interestingly, these Cepheids live in only a restricted region of the sky. Previous studies have tried to prove that ancient stars were hiding in the Milky Way's bulge by studying HP1 and other nearby clusters.
The team calculated that the stars likely date to the first billion years of the universe's life — making them roughly 12.8 billion years old. A University of Colorado at Boulder professor and several colleagues have identified what is believed to be the youngest massive star cluster yet detected in the Milky Way Galaxy. A star is a spherical gaseous object comprising mainly hydrogen and helium, assembled under its own gravity, and able to produce energy through nuclear fusion.
Stars that produce a lot of elements heavier than hydrogen and helium are therefore considered to be relatively young in the cosmic scheme of things.
"These are also some of the oldest stars we've seen anywhere," study co-author Stefano Souza, a doctoral candidate at the University of São Paulo, Brazil, said in a statement.
The intensity and color of each star's light, in turn, reveals the star type — whether it was a dwarf or a giant, for example, or whether it emitted a lot of elements heavier than hydrogen and helium. By combining these ultra-high-definition observations and reviewing archival footage from Hubble, the team calculated the distance to Earth for even the dimmest, most dust-covered stars in HP1. Poring over four years of VVV data, Dékány and colleagues analyzed the light curves of 100 million point sources, 30,000 of which varied in some way. K4 star orbited by a pair of M stars, all orbited by a T7 brown dwarf.
Brown dwarf binary system. By watching a Cepheid’s brightness vary and comparing the variations’ timing to the star’s apparent brightness, astronomers use these stars to measure distances to stars far outside our galaxy. [15 Unforgettable Images of Stars]. Like your typical Twinkie, the contents are fairly old (ok, the stars in the galactic bulge are a little older than the sweet cake, by 8 billion years or so). Thank you for signing up to Live Science. New research shows that star cluster HP1 (seen here through Chile’s Gemini South telescope) may contain some of the oldest stars in the Milky Way, dating to roughly 12.8 billion years old.
And in the Milky Way bulge, the ancient lightweights dominate.
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