Search: id:"swepub:oai:lup.lub.lu.se:0aa77ffc-82eb-4c0c-aee4-148894198cd5" >
Using the multi-obj...
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Lamb, M.University of Victoria,National Research Council of Canada
(author)
Using the multi-object adaptive optics demonstrator RAVEN to observe metal-poor stars in and towards the Galactic Centre
- Article/chapterEnglish2017
Publisher, publication year, extent ...
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2016-11-05
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Oxford University Press (OUP),2017
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22 s.
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LIBRIS-ID:oai:lup.lub.lu.se:0aa77ffc-82eb-4c0c-aee4-148894198cd5
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https://lup.lub.lu.se/record/0aa77ffc-82eb-4c0c-aee4-148894198cd5URI
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https://doi.org/10.1093/mnras/stw2865DOI
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Language:English
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Summary in:English
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Subject category:art swepub-publicationtype
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Subject category:ref swepub-contenttype
Notes
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The chemical abundances for five metal-poor stars in and towards the Galactic bulge have been determined from the H-band infrared spectroscopy taken with the RAVEN multi-object adaptive optics science demonstrator and the Infrared Camera and Spectrograph at the Subaru 8.2-m telescope. Three of these stars are in the Galactic bulge and have metallicities between -2.1<[Fe/H] < -1.5, and high [α/Fe]~+0.3, typical of Galactic disc and bulge stars in this metallicity range; [Al/Fe] and [N/Fe] are also high, whereas [C/Fe] < +0.3. An examination of their orbits suggests that two of these stars may be confined to the Galactic bulge and one is a halo trespasser, though proper motion values used to calculate orbits are quite uncertain. An additional two stars in the globular cluster M22 show [Fe/H] values consistent to within 1σ, although one of these two stars has [Fe/H] = -2.01 ± 0.09, which is on the low end for this cluster. The [α/Fe] and [Ni/Fe] values differ by 2σ, with the most metal-poor star showing significantly higher values for these elements. M22 is known to show element abundance variations, consistent with a multipopulation scenario though our results cannot discriminate this clearly given our abundance uncertainties. This is the first science demonstration of multiobject adaptive optics with high-resolution infrared spectroscopy, and we also discuss the feasibility of this technique for use in the upcoming era of 30-m class telescope facilities.
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Venn, K.University of Victoria
(author)
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Andersen, D.National Research Council of Canada
(author)
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Oya, S.National Astronomical Observatory of Japan
(author)
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Shetrone, M.University of Texas at Austin
(author)
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Fattahi, A.University of Victoria
(author)
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Howes, L.Lund University,Lunds universitet,Astronomi - Genomgår omorganisation,Institutionen för astronomi och teoretisk fysik - Genomgår omorganisation,Naturvetenskapliga fakulteten,Lund Observatory - Undergoing reorganization,Department of Astronomy and Theoretical Physics - Undergoing reorganization,Faculty of Science,Australian National University(Swepub:lu)astr-lho
(author)
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Asplund, M.Australian National University
(author)
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Lardière, O.National Research Council of Canada
(author)
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Akiyama, M.Tohoku University
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Ono, Y.Tohoku University
(author)
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Terada, H.National Astronomical Observatory of Japan
(author)
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Hayano, Y.National Astronomical Observatory of Japan
(author)
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Suzuki, G.Tohoku University
(author)
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Blain, C.University of Victoria
(author)
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Jackson, K.California Institute of Technology
(author)
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Correia, C.Laboratoire d'Astrophysique de Marseille (LAM)
(author)
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Youakim, K.Leibniz Institute for Astrophysics Potsdam (AIP)
(author)
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Bradley, C.University of Victoria
(author)
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University of VictoriaNational Research Council of Canada
(creator_code:org_t)
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In:Monthly Notices of the Royal Astronomical Society: Oxford University Press (OUP)465:3, s. 3536-35570035-87111365-2966
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Lamb, M.
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Venn, K.
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Andersen, D.
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Oya, S.
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Shetrone, M.
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Fattahi, A.
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Howes, L.
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Asplund, M.
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Lardière, O.
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Akiyama, M.
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Ono, Y.
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Terada, H.
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Hayano, Y.
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Suzuki, G.
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Blain, C.
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Jackson, K.
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Correia, C.
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Youakim, K.
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Bradley, C.
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