For You Lot Data - Galactic Archaeology

The star Pristine 221.8781+9.7844 is 1 of the oldest stars inwards the Milky Way. We know this because of its atmosphere. Just later the Big Bang the universe was sum of hydrogen too helium amongst rattling lilliputian lithium in that place were no heavier elements because these are synthesized inwards the interiors of stars. David Aguado´s sentiment is that "As the atmosphere of the star nosotros accept analyzed is rattling misfortunate inwards metals, nosotros tin tell amongst confidence that this is 1 of the oldest objects inwards the Milky Way, too of course of report it is much older than the Sun" too he adds that "This star volition aid us to meliorate sympathise sure enough features of the rootage of the Galaxy too how the outset stars formed"

The star Pristine 221.8781 + 9.7844 was formed from the fabric ejected yesteryear these outset supernovas
[Credit: Gabriel Pérez, SMM (IAC)]

To arrive at this determination detailed studies accept been performed amongst the ISIS spectrograph on the William Herschel Telescope too amongst the IDS spectrograph on the Isaac Newton Telescope, both belonging to the Isaac Newton Group of Telescopes (ING) at the Roque de los Muchachos Observatory (Garafía, La Palma).

"The spectroscopic information amongst intermediate resolution obtain on the INT too the WHT, telescopes on La Palma accept allowed us to demo the depression content of carbon, which is ordinarily rattling abundant inwards this type of stars" explains Carlos Allende, a Professor at the IAC too 1 of the researchers inwards this project.

The report of these rattling onetime stars, which accept been catalogued too analysed inwards the Pristine survey, led from the Leibniz Institute of Astrophysics (Potsdam, Germany) too from the University of Strasbourg (France), aid us to larn to a greater extent than most the nation of the universe inwards its early on days, simply later the Big Bang.

Spectrum of the star Pristine 221.8781 + 9.7844 equally observed amongst the ISIS musical instrument
of the William Herschel telescope [Credit: Else Starkenburg]

To brand the outset detections of these stars, which are survivors from the outset stages of the universe, too accept pristine atmospheres, the squad used a exceptional color filter on the Canada-France-Hawaii Telescope (CFHT) on the overstep of Mauna Kea (Hawaii).

In this report has been used high-resolution spectroscopy obtained amongst the UVES spectrograph inwards the VLT telescope (Paranal, ESO).

"The high resolution spectroscopic information from UVES too the VLT accept allowed us to mensurate the abundance of lithium inwards the atmosphere of this star, which gives us additional information most the rootage of the universe" says Jonay González, a Ramon too Cajal researcher of the IAC too a collaborator inwards the Pristine project.

The report is published inwards Monthly Notices of the Royal Astronomical Society.

Source: Instituto De Astrofísica De Canarias (IAC) [October 10, 2018]


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