June 13 Tue 10:30-11:30 太陽系小天体セミナー Zoom
june 14 Wed 10:30-12:00 SOKENDAI Colloquium Zoom / the large seminar room (hybrid)
June 14 Wed 15:30-17:00 NAOJ Science Colloquium Zoom / the large seminar room (hybrid)
詳細は下記からご覧ください。
=============== June 13 Tue===============
キャンパス：三鷹
セミナー名：太陽系小天体セミナー
定例・臨時の別：定例
日時：6月13日（火曜日）10時00分～11時30分
場所：zoom
講演者：大澤亮
世話人の連絡先
名前：渡部潤一
=============== June 14 Wed===============
Campus：Mitaka
Seminar：SOKENDAI Colloquium
Regularly Scheduled/Sporadic：Regular
Date and time：June 14, 2023 10:00-12:00
Place：Large Seminar Room in Subaru Building and Zoom
Speaker: Chanoul Seo
Affiliation: SOKENDAI 5th year (D3) (Supervisor: Yuka Fujii, Masahiro Ikoma, Hideko Nomura)
Title: Two affecting mechanisms on atmospheric carbon of super-Earth
Speaker: Shun Hatano
Affiliation: SOKENDAI 2nd year (M2) (Supervisor: Masami Ouchi, Takashi Moriya, Yusei Koyama)
Title: Near-infrared variability found in the extremely metal-poor dwarf galaxy SBS 0335-052E
Speaker: Yuta Tashima
Affiliation: SOKENDAI 5th year (D3) (Supervisor: Mami Machida, Fumitaka Nakamura, Tomoya Takiwaki)
Title: A review of the study of magnetic fields in spiral galaxies
Facilitator
-Name：Matsuda, Graduate Student Affairs Unit
=============== June 14 Wed===============
Campus：Mitaka
Seminar：NAOJ Science Colloquium
Regularly Scheduled/Sporadic：Every Wednesday
Date and time：2023 Jun. 14, 15:30-17:00
Place：zoom / the large seminar room (hybrid)
Speaker：Sunao Sugiyama (Kavli IPMU), Xiangchong Li (Carnegie Mellon
University)
Title：Weak lensing cosmology with Subaru Hyper Suprime-Cam Year 3 data
Abstract：
$\Lambda$CDM is the standard model of the Universe, which remarkably
well explains a wide variety of observational results: accelerating
universe via SNe, cosmic microwave background (CMB), and cosmological
large-scale structure. Recently, several studies with data from
stage-of-the-art galaxy surveys reported the so-called “$S_8$ tension”,
which states the discrepancy in the estimated cosmological-structure
growth parameters, $S_8$, from CMB observation vs galaxy surveys, but
they are still within the statistical uncertainty.
To test the $\Lambda$CDM model from the precise measurement of $S_8$
parameter, we carried out the cosmological weak-lensing analyses using
the wide-field imaging survey data by the Subaru Hyper Suprime-Cam
(HSC). We constructed the galaxy-shape catalog from imaging data, the
calibrated photo-z estimate for our galaxy samples, and the advanced
residual PSF modeling. Using these intermediate data, we have performed
four independent cosmological analyses in a blind fashion to avoid
confirmation bias. We employed very conservative analysis choices
against the potential systematics and validated the choices. After
unblinding, we got consistent results among these four analyses, each of
which gives a 5% constraint on $S_8$ parameter and indicates
$2\sim2.5\sigma$ level $S_8$ tension with Planck CMB result.
Facilitator
-Name：Yuhei Iwata
-Comment：English