[Speaker1]
\nTadafumi Matsuno, SOKENDAI 4th year (D2)(Supervisor: Wako Aoki,Yutaka Komiyama,Takuji Tsujimoto) <\/p>\n
[Title]
\nThe first chemo-dynamical view of very metal-poor stars<\/p>\n
[Abstract]
\n The second data release of Gaia (Gaia DR2) enables us to explore motions of a large number of stars in the Milky Way. Maximum scientific output would be obtained by complimenting the Gaia data set with stellar chemical abundances, since stellar motions tell us about past dynamical interactions between Milky Way and satellite galaxies whereas chemical abundances tell us about past star formation activities. To understand the formation history of the Galactic stellar halo, one of the oldest structures in the Milky Way, we have crossmatched the SAGA database, which complies results of abundance measurements for very metal-poor stars in literatures, to the Gaia DR2 catalog. In this talk, after describing the procedure of the crossmatch, I will introduce the latest results from the first chemo-dynamical analysis of very metal-poor stars.<\/p>\n
[Speaker2]
\nSatoshi Kikuta, SOKENDAI 4th year (D2)(Supervisor: Masa Imanishi,Yuichi Matsuda,Yutaka Komiyama) <\/p>\n
[Title]
\nLyman alpha imaging around a hyperluminous QSO at z=2.84 with HSC<\/p>\n
[Abstract]
\nWe present the results of our Ly\u03b1 imaging around a hyperluminous QSO, HS1549+1919, at z=2.84 with Hyper Suprime-Cam (HSC). Thanks to the HSC\u2019s overwhelmingly large FoV, we detected >3000 Ly\u03b1 emitters (LAEs) in diverse environments within a 1.1 deg^2 FoV. The QSO is confirmed to reside in the very center of a protocluster and is surrounded by a ~1pMpc-scale diffuse Ly\u03b1 nebula. The EW distribution and properties of Ly\u03b1 halos are studied as a function of environments. At the center, extreme objects such as QSOs, LABs, and SMGs are far more abundant than fields, suggesting a large amount of gas is accreting towards the center.<\/p>\n","protected":false},"excerpt":{"rendered":"
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