Zobrazeno 1 - 10
of 617
pro vyhledávání: '"G S, Da Costa"'
Autor:
Cássio F. Sanches, Edilson Costa, Geany G. S. da Costa, Flávio F. da S. Binotti, Eliana D. Cardoso
Publikováno v:
Engenharia Agrícola, Vol 37, Iss 1, Pp 24-34 (2017)
ABSTRACT The Brazilian copal is a tree fruit species that can be used for various purposes. The study evaluated protected environments and substrates in forming Brazilian copal seedlings (Hymenaea courbaril), at the State University of Mato Grosso do
Externí odkaz:
https://doaj.org/article/ed74702307a04387ab6ca0b4449bcab8
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 515:2511-2528
Using spectra obtained with the VLT/FORS2 and Gemini-S/GMOS instruments we have investigated carbon, nitrogen and sodium abundances in a sample of red giants in the Small Magellanic Cloud cluster Kron 3. The metallicity and luminosity of this cluster
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b0168ca3bb12f3268192220c5d819768
https://doi.org/10.1093/mnras/stac1724
https://doi.org/10.1093/mnras/stac1724
Autor:
G S Da Costa, M S Bessell, Thomas Nordlander, Arvind C N Hughes, Sven Buder, A D Mackey, Lee R Spitler, D B Zucker
The advent of large-scale stellar spectroscopic surveys naturally leads to the implementation of machine learning techniques to isolate, for example, small sub-samples of potentially interesting stars from the full data set. A recent example is the a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f99d2a7b3cdaf52ae0c4f354d77616dc
http://arxiv.org/abs/2210.05161
http://arxiv.org/abs/2210.05161
Autor:
Denis Erkal, Lara R. Cullinane, G. S. Da Costa, Sergey E. Koposov, Alasdair Mackey, Vasily Belokurov
Publikováno v:
Cullinane, L R, Mackey, A D, Costa, G S D, Erkal, D, Koposov, S E & Belokurov, V 2022, ' The Magellanic Edges Survey II. Formation of the LMC's northern arm ', Monthly Notices of the Royal Astronomical Society, vol. 510, no. 1, pp. 445-468 . https://doi.org/10.1093/mnras/stab3350
The highly-substructured outskirts of the Magellanic Clouds provide ideal locations for studying the complex interaction history between both Clouds and the Milky Way (MW). In this paper, we investigate the origin of a >20$^\circ$ long arm-like featu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5ad6275115b97a75364dd5b4e5c2dc36
https://www.pure.ed.ac.uk/ws/files/241297003/44045076_File000000_1080181569.pdf
https://www.pure.ed.ac.uk/ws/files/241297003/44045076_File000000_1080181569.pdf
Publikováno v:
Cullinane, L R, Mackey, A D, Costa, G S D, Erkal, D, Koposov, S E & Belokurov, V 2022, ' The Magellanic Edges Survey III. Kinematics of the disturbed LMC outskirts ', Monthly Notices of the Royal Astronomical Society, vol. 512, no. 4, pp. 4798-4818 . https://doi.org/10.1093/mnras/stac733
We explore the structural and kinematic properties of the outskirts of the Large Magellanic Cloud (LMC) using data from the Magellanic Edges Survey (MagES) and Gaia EDR3. Even at large galactocentric radii ($8^\circ60 km s$^{-1}$ and apparent counter
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7dbea00ad7ec41143402f19872094214
Publikováno v:
Cullinane, L R, Mackey, A D, Costa, G S D, Koposov, S E & Erkal, D 2023, ' The Magellanic Edges Survey IV. Complex tidal debris in the SMC outskirts ', Monthly Notices of the Royal Astronomical Society, vol. 518, no. 1, pp. L25-L30 . https://doi.org/10.1093/mnrasl/slac129
We use data from the Magellanic Edges Survey (MagES) in combination with Gaia EDR3 to study the extreme southern outskirts of the Small Magellanic Cloud (SMC), focussing on a field at the eastern end of a long arm-like structure which wraps around th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::440cfdb28cbb626a10aef7fff48829bb
Autor:
Lara R. Cullinane, A. K. Vivas, E. Balbinot, Vasily Belokurov, Daniel B. Zucker, Sergey E. Koposov, Jeffrey D. Simpson, Sanjib Sharma, Alasdair Mackey, Denis Erkal, G. M. De Silva, Douglas L. Tucker, Risa H. Wechsler, J. D. Simon, Keith Bechtol, Kyler Kuehn, Alexander P. Ji, Geraint F. Lewis, Alex Drlica-Wagner, Brian Yanny, Marla Geha, Joss Bland-Hawthorn, Andrew B. Pace, S. Allam, Nora Shipp, G. S. Da Costa, Tenglin Li, Andrew R. Casey, Jeremy Mould, Zhen Wan, Yao-Yuan Mao, Sarah L. Martell
Publikováno v:
Li, T S, Koposov, S E, Zucker, D B, Lewis, G F, Kuehn, K, Simpson, J D, Ji, A P, Shipp, N, Mao, Y-Y, Geha, M, Pace, A B, Mackey, A D, Allam, S, Tucker, D L, Da Costa, G S, Erkal, D, Simon, J D, Mould, J R, Martell, S L, Wan, Z, De Silva, G M, Bechtol, K, Balbinot, E, Belokurov, V, Bland-Hawthorn, J, Casey, A R, Cullinane, L, Drlica-Wagner, A, Sharma, S, Vivas, A K, Wechsler, R H & Yanny, B 2019, ' The southern stellar stream spectroscopic survey (S5): Overview, target selection, data reduction, validation, and early science ', Monthly Notices of the Royal Astronomical Society, vol. 490, no. 3, pp. 3508-3531 . https://doi.org/10.1093/mnras/stz2731
Monthly Notices of the Royal Astronomical Society, 490, 3508-3531. Oxford University Press
Monthly Notices of the Royal Astronomical Society, 490, 3508-3531. Oxford University Press
We introduce the Southern Stellar Stream Spectroscopy Survey (${S}^5$), an on-going program to map the kinematics and chemistry of stellar streams in the Southern Hemisphere. The initial focus of ${S}^5$ has been spectroscopic observations of recentl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::150d9f7a4181c386d03b8028b4acd8d2
https://doi.org/10.1093/mnras/stz2731
https://doi.org/10.1093/mnras/stz2731
Autor:
Alasdair Mackey, A. F. Marino, Brian P. Schmidt, Martin Asplund, Anirudh Chiti, John E. Norris, David Yong, Thomas Nordlander, G. S. Da Costa, Simon J. Murphy, Chiaki Kobayashi, Michael S. Bessell, X. D. Gao, Karin Lind, Andrew R. Casey, Anna Frebel
Publikováno v:
Monthly Notices of the Royal Astronomical Society
We present chemical abundances for 21 elements (from Li to Eu) in 150 metal-poor Galactic stars spanning $-$4.1 $$ $-$3.5. Of the 20 objects for which we could measure nitrogen, 11 are nitrogen-enhanced metal-poor stars. Within our sample, the high N
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a95b051a94450ad8b319c0f54002b378
Autor:
Stefan Dreizler, Tim-Oliver Husser, Sebastian Kamann, M. G. Guarcello, Nate Bastian, G. S. Da Costa, Vincent Hénault-Brunet, Christopher Usher, Mark Gieles, I. Cabrera-Ziri, S. Saracino
Publikováno v:
Digital.CSIC. Repositorio Institucional del CSIC
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We report on the detection of a black hole (NGC 1850 BH1) in the ∼100-Myr-old massive cluster NGC 1850 in the Large Magellanic Cloud. It is in a binary system with a main-sequence turn-off star (4.9 ± 0.4 M·), which is starting to fill its Roche
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d189309889ec2b932bc45be7e69d9c00
Autor:
Martin Asplund, Chiaki Kobayashi, Anna Frebel, Alasdair Mackey, Andrew R. Casey, G. S. Da Costa, Simon J. Murphy, Anna F. Marino, Anirudh Chiti, David Yong, Thomas Nordlander, Michael S. Bessell, Karin Lind, Brian P. Schmidt
Publikováno v:
Nature
Neutron-star mergers were recently confirmed as sites of rapid-neutron-capture (r-process) nucleosynthesis. However, in Galactic chemical evolution models, neutron-star mergers alone cannot reproduce the observed element abundance patterns of extreme
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::559b30e398132820fd5cf5410bd7d4a6