Light & Shadow in the Deep: Strong Absorption Systems Probed by - PowerPoint PPT Presentation

Light & Shadow in the Deep: Strong Absorption Systems Probed by a Deep NB Imaging Rhythm Shimakawa NAOJ Fellow (Subaru Telescope)

2 Topics (Summary) 2min-: Narrow-Band Absorbers (NBAs) • What are NBAs? • Dual NBA–H α Emitters at z=2.5 • Puzzling NBAs behind the Narrow-band Redshift 7min-: Diffuse H α Light outside of ISM of galaxies • Narrow-band Emitters from HSC-SSP U/Deep Survey • Deep Stacking of H α Emitters at z=0.4 • Radial Profile of H α Line Emission 10min-: (Announcement) Subaru 20th Anniversary • Towards Subaru International Operation • Subaru-EAO HZG WS 2019 • NAOJ Symposium: Subaru 20th Anniversary & UM at Hawaii

3 Narrow-Band Absorbers (NBAs) Sources showing NB 'deficits' we expect Ly α abs. in this case NBAs 2 NB 428 − B 1 NB428 EW abs,rest =10Å 0 . 5 B U 0 NB2315 Transmittance 0 . 4 22 23 24 25 26 0 . 3 B 0 . 2 0 . 1 2 . 5 2 . 6 (z) 0 . 0 3500 4000 4500 5000 Wavelength [ ˚ A] 2 . 00 2 . 25 2 . 50 2 . 75 3 . 00 Ly α redshift R Shimakawa et al. 2017a

4 Spatial and Redshift Distribution of NBAs Ly α Ly β Photo-z (61) 15 HAEs (8/61) VANDELS (6/61) NBAs (37/61) Number NBAs 10 LAEs HAEs − 5 . 1 5 Dec. [deg] − 5 . 2 0 0 1 2 3 Redshift − 5 . 3 − 5 . 4 34 . 7 34 . 6 34 . 5 34 . 4 34 . 3 R.A. [deg] R Shimakawa et al. 2017a

5 Dual NBA–HAEs? Dual NBA-HAEs EW Ly α vs. E(B-V) EW Ly α <–10Å & EW H α ＞ 100Å HAEs & LAEs (RS+17a), and LBGs (A E Shapley et al. 2003) Dot: NB2315 Solid: NB428 z 2 . 5 2 . 6 10 2 K s − NB 2315 7 Σ NB2315 5 1 3 EW H α ,rest = 30 ˚ A 2 0 0 16 18 20 22 24 NB 2315 R Shimakawa et al. 2017a

6 Puzzling NBAs behind the Narrow-band Redshift From VANDELS Archive Data (VIMOS 20/40 or 40/80 hours) Ly α C IV C III from L Pentericci et al. 2018 10 10 A − 1 ] A − 1 ] z obj f λ [ 10 − 19 erg s − 1 cm − 2 ˚ f λ [ 10 − 19 erg s − 1 cm − 2 ˚ 8 8 6 6 4 4 2 2 0 0 5000 6000 7000 5000 6000 7000 Wave Wavelen These are not so helpful ...

8 Diffuse H α Light outside of ISM of galaxies Seeking ionizing photons beyond ISM Huge H α structure surrounding the Spiderweb radio galaxy at z=2.16 we are now interested in tails of H α emission in more typical galaxies... R Shimakawa et al. 2018b

9 Radial Profile of H α Emission from a composite image Radial Profile of H α (+[N II ]) Emission at z=0.4 Preliminary Result HAE catalog by Hayashi+17 10 0 PSF-convolved F H α [10 − 17 erg s − 1 cm − 2 arcsec − 2 ] based on HSC-SSP DR1 10 − 1 Cont. 0 10 20 30 40 50 Radius [ph-kpc] The data from 641 HAEs in UD-COSMOS (we will increase to ~100k) M Hayashi et al. 2018a

7 Scientific Motivation J Tumlinson et al. 2017 ARA&A Plan for the next year Ly α morphology at z>2 D i fg u s e g a s So far we have only 41 source a s g g n i l c y c → how much we can increase data? e Random Aligned R s a g g n i t e H α morphology r c NB428 NB428 c A 15 kpc It is unfeasible to study at z>2 → test analyses at z~0.4 (~100k) O Pls let me know if you could join u t fm o w s and provide us with samples! 300 kpc

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

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