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SUMMARY:The Milky Way Tomography with Subaru Hyper Suprime-Cam. I. Halo su
 bstructures
DTSTART;VALUE=DATE-TIME:20230321T080000Z
DTEND;VALUE=DATE-TIME:20230321T081500Z
DTSTAMP;VALUE=DATE-TIME:20241114T092415Z
UID:indico-contribution-194@meetings.aip.de
DESCRIPTION:Speakers: Yoshihisa Suzuki (Astronomical Institute\, Tohoku Un
 iversity)\nUnder the current standard scenario\, galaxies such as the Milk
 y Way (MW) are thought to have formed through repeated mergers and accreti
 ons of small galaxies due to gravitational interactions. Since the relaxat
 ion timescale of these traces in phase space is as long as more than 10 bi
 llion years\, it has been theoretically suggested that they may still exis
 t in the halo. Advances in large-scale observations have ushered in the er
 a in which such traces can be investigated observationally. The MW\, to wh
 ich we belong\, is of particular interest because it is possible to direct
 ly observe stellar streams and substructures as they are destroyed by tida
 l forces as small galaxies merge and accrete into it. Currently while the 
 structure and substructures in the halo within 20-30 kpc from the center o
 f the MW is becoming better understood from the viewpoint of chemodynamics
 \, the structure in the outer halo is still largely unresolved.\n In this 
 study we used the entire HSC-SSP data (~1400 square degrees)\, characteriz
 ed by wide field of view (~1.8 square degrees) and deep photometry (i \n\n
 https://iaus379.aip.de/event/20/contributions/194/
LOCATION:Haus H\, Telegrafenberg
URL:https://iaus379.aip.de/event/20/contributions/194/
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