SLIDE 1
Light & Shadow in the Deep:
Strong Absorption Systems Probed by a Deep NB Imaging
Rhythm Shimakawa NAOJ Fellow (Subaru Telescope)
SLIDE 2 2
Topics (Summary) 2min-: Narrow-Band Absorbers (NBAs)
- What are NBAs?
- Dual NBA–Hα Emitters at z=2.5
- Puzzling NBAs behind the Narrow-band Redshift
7min-: Diffuse Hα Light outside of ISM of galaxies
- Narrow-band Emitters from HSC-SSP U/Deep Survey
- Deep Stacking of Hα Emitters at z=0.4
- Radial Profile of Hα Line Emission
10min-: (Announcement) Subaru 20th Anniversary
- Towards Subaru International Operation
- Subaru-EAO HZG WS 2019
- NAOJ Symposium: Subaru 20th Anniversary & UM at Hawaii
SLIDE 3 3
Narrow-Band Absorbers (NBAs)
3500 4000 4500 5000 Wavelength [ ˚ A] 0.0 0.1 0.2 0.3 0.4 0.5 Transmittance
NB428 B U NB2315
2.00 2.25 2.50 2.75 3.00 Lyα redshift 2.5 2.6
(z)
22 23 24 25 26 B 1 2 NB428 − B
NBAs
R Shimakawa et al. 2017a
Sources showing NB 'deficits' we expect Lyα abs. in this case
EWabs,rest=10Å
SLIDE 4 34.3 34.4 34.5 34.6 34.7 R.A. [deg] −5.4 −5.3 −5.2 −5.1
NBAs LAEs HAEs
4
Spatial and Redshift Distribution of NBAs
R Shimakawa et al. 2017a
1 2 3 Redshift 5 10 15 Number
Lyα Lyβ
Photo-z (61) HAEs (8/61) VANDELS (6/61) NBAs (37/61)
SLIDE 5 5
Dual NBA–HAEs?
EWLyα vs. E(B-V)
HAEs & LAEs (RS+17a), and LBGs (A E Shapley et al. 2003)
16 18 20 22 24 NB2315 1 2 Ks − NB2315
EWHα,rest = 30 ˚ A
2 3 5 7 10 ΣNB2315
Dual NBA-HAEs EWLyα<–10Å & EWHα＞100Å
2.5 2.6
z
Dot: NB2315 Solid: NB428
R Shimakawa et al. 2017a
SLIDE 6
6
Puzzling NBAs behind the Narrow-band Redshift From VANDELS Archive Data (VIMOS 20/40 or 40/80 hours)
5000 6000 7000 Wave 2 4 6 8 10 fλ [10−19 erg s−1cm−2 ˚ A−1] 5000 6000 7000 Wavelen 2 4 6 8 10 fλ [10−19 erg s−1cm−2 ˚ A−1]
from L Pentericci et al. 2018
zobj
Lyα CIV CIII
These are not so helpful ...
SLIDE 7
8
Diffuse Hα Light outside of ISM of galaxies Seeking ionizing photons beyond ISM
Huge Hα structure surrounding the Spiderweb radio galaxy at z=2.16 we are now interested in tails of Hα emission in more typical galaxies...
R Shimakawa et al. 2018b
SLIDE 8
9
Radial Profile of Hα Emission from a composite image Radial Profile of Hα(+[NII]) Emission at z=0.4
Preliminary Result
10 20 30 40 50 Radius [ph-kpc] 10−1 100 FHα [10−17erg s−1cm−2arcsec−2]
PSF-convolved Cont.
HAE catalog by Hayashi+17
based on HSC-SSP DR1
M Hayashi et al. 2018a
The data from 641 HAEs in UD-COSMOS (we will increase to ~100k)
SLIDE 9 7
Scientific Motivation Plan for the next year Lyα morphology at z>2
So far we have only 41 source → how much we can increase data?
Hα morphology
It is unfeasible to study at z>2 → test analyses at z~0.4 (~100k) Pls let me know if you could join and provide us with samples!
R e c y c l i n g g a s D i fg u s e g a s A c c r e t i n g g a s 15 kpc 300 kpc O u t fm
s
J Tumlinson et al. 2017 ARA&A
Random Aligned NB428 NB428
SLIDE 10 10
Next Year: Subaru 20th Anniversary Key Issues Towards Next Decades with Subaru
★ Significant decline of budget
- Towards Subaru International Operation
- How to keep SSP & open use
- Synergy with TMT and other future telescopes
Subaru EAO High-z Galaxy Workshop 2019 1/31, 2/1 at NAOJ
chaired by Zheng Cai (THCA) and RS
SLIDE 11
10
The 7th Subaru International Conference
The 5th NAOJ Symposium / The 7th Subaru International Conference
Subaru Telescope 20th Anniversary & Next 20 Years of Science
November 2019 at Waikoloa Village, chaired by S Okamoto and RS Theme: All science & instruments. We may include Subaru UM FY2019
