Abell 2163 RELICS (HST ACS) Reionization Lensing Cluster Survey gev2018 ‒ June 6th 2 Q. When did the first galaxies form? Q. How did they evolve? Q. What were their properties? Q. Did they reionize the universe? ・Galaxy Counting (Luminosity functions) Necessary ・Detailing individual galaxies in large samples gev2018 ‒ June 6th 3 CIV A1689-zD1 (z=7.5, μ=9.3) Watson+15 HST+ALMA RXCJ2248.7-4431-ID3 OIII] (z=6.1, μ=5.5) Mainali+17 MACS0647-JD (z=10.8) A2744-YD4 (z=8.4, μ=1.8) (μ~8) Coe+13 Laporte+17 LBG (μ~7) (μ~2) gev2018 ‒ June 6th 4 [OIII] Lya MACS1149-JD1 (z=9.1, μ~10) © ALMA (ESO/NAOJ/NRAO) Hashimoto+18 gev2018 ‒ June 6th 5 Bradley+14 Bradley+14 181 log (Number) 110 Ishigaki+18 Apparent mUV (mag) gev2018 ‒ June 6th 6 Bradley+14 mUV<=24.5 Bradley+14 9 log (Number) 2 Ishigaki+18 Apparent mUV (mag) gev2018 ‒ June 6th 7 - REionization LensIng Cluster Survey Abell 2163 (ACS falsecolor) - HST Treasury Program - PI: Dan Coe (STScI) - Oct. 2015 ‒ April 2017 - ~7 bands (ACS/WFC + WFC3/IR) - 190 orbits (5σ depth = 26-27 mag) RELICS gev2018 ‒ June 6th 8 Reionization Lensing Cluster Survey ・41 galaxy-cluster regions - ~200 arcmin2 Credit: Coe RELICS gev2018 ‒ June 6th 9 Reionization Lensing Cluster Survey ・41 galaxy-cluster regions ) 2 ⦿ - ~200 arcmin M SZ SZ Mass 14 - most massive (> 4x1014 M ), ⦿ (10 causing ‘powerful’ strong-lensing Planck - mass-modeling is RXC0911+17 ongoing Redshift (currently 20/41 Credit: Coe released) 10” Kikuchihara+ RELICS gev2018 ‒ June 6th 10 Reionization Lensing Cluster Survey Brightest candidates at z=6 intrinsic (delensed): 25.4 mag ~ x23 magnified at z=7 apparent (lensed): 23.4 mag at z=8 RELICS gev2018 ‒ June 6th 11 Salmon+17 Reionization Lensing Cluster Survey Bright high-z galaxy candidates detected efficiently owing to lensing difference of > dex Salmon+17 RELICS gev2018 ‒ June 6th 12 Reionization Lensing Cluster Survey mUV<=24.5 Bradley+14 9 (181) 31 log (Number) (total 321) Salmon+17 2 (110) Ishigaki+18 Apparent m (mag) UV RELICS gev2018 ‒ June 6th 13 Reionization Lensing Cluster Survey Counter img #2 Lens model constructed H =25.7 by Kikuchihara+ using 160 (fainter than GLAFIC detection limit) arcsec 3 3 arcsec Prediction based on the lens model Counter img #1 does not rule out z=9.9 (fainter than detection limit (?)) SPT0615-57 RELICS gev2018 ‒ June 6th 14 Reionization Lensing Cluster Survey Spitzer ALMA - 390 hr for all clusters (archive) - 1 cluster-field survey (archive) ACT0102-49 ACS0102-49 HST (ALMA/band 6) HST (ACS) (WFC3/IR) Spitzer (IRAC) + 15 more (proposed for cy6) + As part of the ALMA Lensing Cluster Survey 330 hr (proposal accepted; cy14) (PI: Kohno) Redshift verification, Properties of faint SMGs, stellar mass, AV, etc. IRX-β, [CII]/CO LF, etc. RELICS gev2018 ‒ June 6th 15 Reionization Lensing Cluster Survey ・RELICS surveyed the 41 cluster regions with HST. ・321 galaxy candidates were identified at z=6-8, including brightly-lensed sources (~23 mag). ・Mass-modeling is ongoing (20/41 released). ・Follow-up observations have been proposed to find the properties of the candidates (Spitzer, ALMA). RELICS gev2018 ‒ June 6th 16 Reionization Lensing Cluster Survey gev2018 ‒ June 6th 17 difference of > dex Salmon+17 gev2018 ‒ June 6th 18 HST JWST Credit: Coe gev2018 ‒ June 6th 19 ・JWST will identify high-z galaxies of ~ -17 mag JWST Taking advantage HabEx (6.5m) of cluster lensing! HST (4.0m) + lens (2.4m) + lens + lens z=11 WFIRST (2.4m) z=11 O’Meara, Ouchi, Postman, Ishigaki, Kikuchihara gev2018 ‒ June 6th 20 © NASA LUVOIR (15.1m) JWST + lens HabEx (6.5m) launch: mid 2030s HST (4.0m) + lens (2.4m) + lens + lens ・LUVOIR+lens will z=11 reach ~ -10 mag WFIRST (2.4m) First stars or star-clusters?! O’Meara, Ouchi, Postman, Ishigaki, Kikuchihara gev2018 ‒ June 6th 21 ・High-z galaxies are efficiently detected owing to cluster-lensing, especially at z>10. ・JWST will identify galaxies of ~ -17 mag at z~10. LUVOIR will reach ~ -10 mag at z~10, identifying the first stars or star-clusters (?!). Thank you! © Ehime University © Ehime Prefectural Office gev2018 ‒ June 6th 22.