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ARMAGH OBSERVATORY AND PLANETARIUM SPEARHEADS GROUNDBREAKING STUDY OF MASSIVE STARS – Astronotes

August 15, 2023
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ARMAGH OBSERVATORY AND PLANETARIUM SPEARHEADS GROUNDBREAKING STUDY OF MASSIVE STARS – Astronotes
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A world collaboration of astronomers led by Armagh Observatory and Planetarium has launched a groundbreaking examine into probably the most large stars in our native dwarf galaxies, the Small and Massive Magellanic Clouds.

Led by the organisation’s Professor Jorick Vink, the XShootU consortium collaborated with the House Telescope Science Institute to undertake the analysis challenge.

Prof. Jorick Vink

Revealed by Astronomy & Astrophysics and titled X-Taking pictures ULLYSES: Large Stars at Low Metallicity, the paper* is the primary in a collection of many by the worldwide collaboration.

It’s based mostly on data gathered utilizing distinctive ultraviolet knowledge gleaned from the Hubble House Telescope through its UV Legacy Library of Younger Stars as Important Requirements (ULLYSES) Legacy challenge.

This was mixed with ground-based optical knowledge noticed utilizing the European Southern Observatory’s Very Massive Telescope.

Through the challenge, the Hubble House Telescope underwent 1,000 orbits to watch 250 large stars in addition to younger stars beneath the ULLYSES program.

The large star forming area NGC 346 within the pristine Small Magellanic Cloud (SMC).
It combines observations from the Hubble House Telescope (HST) and the European Southern Observatory’s (ESO) Very Massive Telescope (VLT). Credit score: ESA and Hubble

Professor Hugues Sana of KU Leuven Institute of Astronomy led the discount of the European Southern Observatory’s knowledge. He says, “With 1000 HST Orbits, ULLYSES is the most important challenge ever undertaken on the Hubble House Telescope.”

The examine describes the way it has turn out to be clear over latest a long time that metallicity adjustments the elemental bodily properties of stars, and that within the case of large stars, stellar winds are pushed by metals.

Metals are the chemical parts that make up the Periodic Desk, and upon which all life on Earth relies.

Andrea Mehner, Employees Astronomer at European Southern Observatory, says, “We have been delighted to collaborate on this important analysis paper and are happy that our Very Massive Telescope has performed a key function in observing the consequences of metallicity on stars.“

The paper additionally observes how, from the start of the Universe, metallic content material has grown constantly attributable to chemical stellar suggestions within the type of winds and supernova explosions from large stars.

It notes that these interactions have helped to create the photo voltaic metallicity atmosphere of the Milky Manner Galaxy.

The large star forming 30 Doradus area within the LMC — in Ultraviolet and Optical mild.
Credit score: NASA, ESA, F. Paresce (INAF-IASF, Bologna, Italy), R. O’Connell (College of Virginia, Charlottesville), and the Broad Subject Digicam 3 Science Oversight Committee

Dr. Alex Fullerton, Observatory Scientist on the House Telescope Science Institute, provides, “We’re excited to see the various scientific insights that the group will derive from this in depth library of optical and UV spectra.”

X-Taking pictures ULLYSES: Large Stars at Low Metallicity outlines how observations of particular person large stars, together with super-luminous supernovae and different phenomena, point out that the low-metallicity Universe is essentially completely different from our personal Galaxy.

Jorick Vink, Senior Analysis Astronomer at Armagh Observatory and Planetarium, feedback, “As uncertainties in stellar and wind parameters percolate into many adjoining areas of Astrophysics, the information and modelling used to supply the ‘X-Taking pictures ULLYSES: Large Stars at Low Metallicity’ analysis paper is a game-changer for our bodily understanding of large stars at low Z.” 



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