Zobrazeno 1 - 10
of 13
pro vyhledávání: '"G. C. Myeong"'
Autor:
G. C. Myeong, Vasily Belokurov, David S. Aguado, N. Wyn Evans, Nelson Caldwell, James Bradley
We report the results of an unsupervised decomposition of the local stellar halo in the chemo-dynamical space spanned by the abundance measurements from APOGEE DR17 and GALAH DR3. In our Gaussian Mixture Model, only four independent components domina
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0f747d7e5cc743cf4ef2a0a81065fe55
https://www.repository.cam.ac.uk/handle/1810/341927
https://www.repository.cam.ac.uk/handle/1810/341927
Autor:
Sergey E. Koposov, Camila Navarrete, Carlos Allende Prieto, Luca Sbordone, Zhen Yuan, Luis Peralta de Arriba, David Aguado, Jonay I. González Hernández, Vasily Belokurov, Gustavo A. Lanfranchi, Matthew Shetrone, Francesca Matteucci, N. Wyn Evans, Julio Chanamé, G. C. Myeong
Publikováno v:
Aguado, D S, Myeong, G C, Belokurov, V, Evans, N W, Koposov, S E, Prieto, C A, Lanfranchi, G A, Matteucci, F, Shetrone, M, Sbordone, L, Navarrete, C, Hernández, J I G, Chanamé, J, Arriba, L P D & Yuan, Z 2021, ' The S2 Stream : the shreds of a primitive dwarf galaxy ', Monthly Notices of the Royal Astronomical Society, vol. 500, no. 1, pp. 889-910 . https://doi.org/10.1093/mnras/staa3250
The S2 stream is a kinematically cold stream that is plunging downwards through the Galactic disc. It may be part of a hotter and more diffuse structure called the Helmi stream. We present a multi-instrument chemical analysis of the stars in the meta
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5cc2f7f7c451d4181541bcae31ce079a
Autor:
Zhen Yuan, Nick Evans, Vinicius M. Placco, Projjwal Banerjee, Timothy C. Beers, G. C. Myeong, Young Sun Lee, Devin D. Whitten, Tadafumi Matsuno, Gang Zhao, Matthew Smith, Kohei Hattori, D. Gudin, Haining Li
We search for dynamical substructures in the LAMOST DR3 very metal-poor (VMP) star catalog. After cross-matching with Gaia DR2, there are 3300 VMP stars with available high-quality astrometric information that have halo-like kinematics. We apply a me
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4019837c1fa954ff704559a8879bb28b
http://arxiv.org/abs/1910.07538
http://arxiv.org/abs/1910.07538
Autor:
Phillip A. Cargile, Joshua S. Speagle, Rohan P. Naidu, Dennis Zaritsky, J. M. Diederik Kruijssen, Nelson Caldwell, Yuan-Sen Ting, Benjamin D. Johnson, Charlie Conroy, Ana Bonaca, G. C. Myeong, Jiwon Jesse Han
Publikováno v:
The Astrophysical Journal Letters. 909:L26
The origins of most stellar streams in the Milky Way are unknown. With improved proper motions provided by Gaia EDR3, we show that the orbits of 23 Galactic stellar streams are highly clustered in orbital phase space. Based on their energies and angu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::330a81d31082fa78eec2571cfbb83059
https://doi.org/10.3847/2041-8213/abeaa9
https://doi.org/10.3847/2041-8213/abeaa9
Autor:
Chiaki Kobayashi, Vasily Belokurov, N. Wyn Evans, David Aguado, Luca Sbordone, Camila Navarrete, Sergey E. Koposov, Julio Chanamé, G. C. Myeong
Publikováno v:
Aguado, D S, Belokurov, V, Myeong, G C, Evans, N W, Kobayashi, C, Sbordone, L, Chanamé, J, Navarrete, C & Koposov, S E 2021, ' Elevated r-process enrichment in Gaia Sausage and Sequoia ', Astrophysical Journal Letters, vol. 908, no. 1, pp. 1-9 . https://doi.org/10.3847/2041-8213/abdbb8
The Gaia Sausage (GS) and the Sequoia represent the major accretion events that formed the stellar halo of the Milky Way. A detailed chemical study of these main building blocks provides a pristine view of the early steps of the Galaxy's assembly. We
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5d34b12fc0043c826b8cd016dc5e890c
https://doi.org/10.3847/2041-8213/abdbb8
https://doi.org/10.3847/2041-8213/abdbb8
Publikováno v:
Myeong, G C, Evans, N W, Belokurov, V, Sanders, J L & Koposov, S 2018, ' The Milky Way Halo in Action Space ', The Astrophysical Journal Letters, . https://doi.org/10.3847/2041-8213/aab613
We analyze the structure of the local stellar halo of the Milky Way using ~60000 stars with full phase space coordinates extracted from the SDSS–Gaia catalog. We display stars in action space as a function of metallicity in a realistic axisymmetric
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1bc4da6775f105d136e768d662c72c50
We report the discovery of tidal tails around the two outer halo globular clusters, Eridanus and Palomar 15, based on gi-band images obtained with DECam at the CTIO 4 m Blanco Telescope. The tidal tails are among the most remote stellar streams curre
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::30c3b995d3f94211c8bb90862a515508
Publikováno v:
Myeong, G C, Evans, N W, Belokurov, V, Sanders, J L & Koposov, S E 2018, ' The Sausage Globular Clusters ', Astrophysical Journal Letters . https://doi.org/10.3847/2041-8213/aad7f7
The Gaia Sausage is an elongated structure in velocity space discovered by Belokurov et al. (2018) using the kinematics of metal-rich halo stars. It was created by a massive dwarf galaxy ($\sim 5 \times 10^{10} M_\odot$) on a strongly radial orbit th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::15e5b396f84c05c3e35cff6b5ee05fd6
https://doi.org/10.3847/2041-8213/aad7f7
https://doi.org/10.3847/2041-8213/aad7f7
Autor:
Zhen Yuan, G. C. Myeong, Timothy C. Beers, N. W. Evans, Young Sun Lee, Projjwal Banerjee, Dmitrii Gudin, Kohei Hattori, Haining Li, Tadafumi Matsuno, Vinicius M. Placco, M. C. Smith, Devin D. Whitten, Gang Zhao
Publikováno v:
Astrophysical Journal; 3/1/2020, Vol. 891 Issue 1, p1-1, 1p
Publikováno v:
Astrophysical Journal Letters; 4/1/2018, Vol. 856 Issue 2, p1-1, 1p