1. Infrared Medium-deep Survey Myungshin Im 1, Soojong Pak 2, Won-Kee Park 1,3, Ji Hoon Kim 1, Jae-Woo Kim 1, Seong-Kook J. Lee 1, Marios Karouzos 1, Yiseul Jeon 1, Changsu Choi 1, Hyunsung Jun 1, Dohyeong Kim 1, Jueun Hong 1, Duho Kim 1, Minhee Hyun 1, Yongmin Yoon 1, Yoon Chan Taak 1, Yongjung Kim 1, Giseon Baek 2, Hyeonju Jeong 2, Juhee Lim 2, Eunbin Kim 2, Nahyun Choi 2, Hye-In Lee 2, K. M. Bae 2, & Seunghyuk Chang 4 & IMS Team 1 CEOU/Astronomy Program, Dept. of Physics & Astronomy, Seoul National University, Seoul 151-742, KOREA, 2 School of Space Research, Kyung Hee University, Suwon 446-741, KOREA, 3 Korea Astronomy and Space Science Institute, Daejeon 305-348, KOREA, 4 Samsung Electronics, Suwon, Gyeonggi-do 443-370, KOREA 2014. 11. 03 - 11. 07The 6th KIAS Workshop

2. Infrared Medium-deep Survey Imaging survey at J < 23 AB mag, 120 deg 2 of 7 fields (additional Y-band data for a limited area) Follow-up NIR imaging of high redshift objects selected from 2000+ deg 2 Imaging observations with UKIRT, McDonald 2.1m, since 2010 Follow-up spectroscopy with Magellan and 4-m class telescopes ~30 members from SNU, KHU, KASI, KNU, ASIAA, NCU, Subaru, JPL, … 2014. 11. 03 - 11. 07The 6th KIAS Workshop McDonald 2.1-m with CQUEAN (grizY, is/iz) UKIRT 3.9-m (zYJHK)

3. Key Scientific Questions Supermassive Black Holes (10 9 – 10 10 M ⊙ ) at z < 7 (Fan et al. 2005; Mortlock et al. 2011) When and how did they emerge? Re-ionization State of IGM? Quasars at 5 < z < 7.5 Massive clusters at z > 1! (Foley et al. 2011 + many) How did galaxies evolve? LCDM universe OK? Halo mass/galaxy relation? Massive clusters at z > 1 First stars at z ~ 11.5? (Planck results +) Death of massive stars? GRBs and SNe 2014. 11. 03 - 11. 07The 6th KIAS Workshop

4. High Redshift Objects Are Red QSO at z=7 Galaxy at z=2 Brown dwarf NIR imaging is essential 2014. 11. 03 - 11. 07The 6th KIAS Workshop

5. Survey Design : How Many, How Deep? 1.How faint? 2. How many? 3. What wavelength? 0.01 to 1 per 1 sq. degree 23 AB 등급 0.9 – 1 μm or longer: J or Y-band Quasars and galaxy clusters at high redshift Im et al. (2002) 2014. 11. 03 - 11. 07The 6th KIAS Workshop QSO LF (Willott et al. 2010) ~L 3

6. IMS Fields: Total ~ 120 deg 2 FieldRADecArea (deg 2 ) Optical Coverage (mag/deg 2 )NIR CoverageIR coverage XMM-LSS02:21:20-04:305CFHTLS-W1 (35 MegaPipe z- fields, z ~ 25AB/72deg 2 ), NOAO DWS, Maidanak Y-band UKIDSS DXS+UDS (2.6/8.75) SWIRE (9.2) CFHTLS-W208:54-04:1549CFHLTLS-W2 (19 MegaPipe z- fields, z~25AB/49 deg2), COSMOS HST (1.8 deg2) No NIR yet Lockman Hole 10:45:0058:0015CFHT MegaPipe Archive (15 fields), Subaru (~18 fields, I = 26 AB, B=27AB) UKIDSS DXS (1/8.75) SWIRE (11) EGS14:1754:3049CFHTLS-W3 (44 MegaPipe z- fields, z~25ABmag/49 deg2) No NIR yetIRAC GTO data, AKARI 15 micron ELAIS-N116:11:0055:009CFHT MegaPipe (9 fields, z~25AB mag) Subaru Deep I (18 fields (5 deg2) UKIDSS DXS+UDS (1.7/8.75) SWIRE (9.2) ELAIS-N216:36:4841:01:4 5 6CFHT MegaPipe (6 fields, z~25 AB mag), Subaru Deep I (18 fields (5 deg2) No NIR yetSWIRE(4.8) SA2222:1700:2016CFHLTLS-W4 (20 MegaPipe z- fields, z~25AB/16 deg2 UKIDSS DXS+UDS (3.5/8.75) None 2014. 11. 03 - 11. 07The 6 th KIAS Workshop

7. Science Highlights High redshift quasars High redshift galaxy clusters/galaxies Transient objects (GRBs, TDE, SNe, etc) 2014. 11. 03 - 11. 07The 6th KIAS Workshop

8. SMBH Mass Evolution AKARI points (Jun, H., MI, 2014 submitted) z ~ 5.5z > 6.5 ? Fast growth from stellar mass BHs Slow growth with heavy BH seeds 2014. 11. 03 - 11. 07The 6th KIAS Workshop 10 10 M ⊙ at z ~ 5 (1.2 Gyr), and a few x 10 9 M ⊙ at z ~ 6.4 (0.95 Gyr) Emergence of SMBHs [L bol /L Edd ~ 1  high accretion rate; Hot dust-poor (e.g., Jun & Im 2013)] What was happening at z ~ 5.5 and z > 7 (only one z=7 QSO so far)? Bias for high accretion rate objects?

9. Faint quasars at z > ~6 SMBHs with low accretion? Budget of IGM ionizing photon 2014. 11. 03 - 11. 07The 6th KIAS Workshop Willott et al. (2010)

10. z~5.5 Quasars Identification of z ~ 5.5 QSOs is difficult with SDSS filters 2014. 11. 03 - 11. 07The 6th KIAS Workshop Chiu et al. 2005

11. High Redshift Quasar Selection @z=5.5 and z=6.5 With Special Filters 2014. 11. 03 - 11. 07The 6th KIAS Workshop

12. CQUEAN, Camera for QUasars in EArly uNiverse Kyungheee Univ.(S. Pak)/SNU NIR sensitive (~1 micron) Custom is and iz filters - tailored for high-z QSO selection Focal Reducer (3x, 5’ x 5’) Auto-guiding system Installed on the 2.1m at McDonald Observatory ~30 nights/year for high redshift quasar survey 2014. 11. 03 - 11. 07The 6th KIAS Workshop Park, Pak, MI et al. (2012)

13. Quasars at 5 < z < 5.5 2014. 11. 03 - 11. 07The 6th KIAS Workshop Park, Pak, MI, et al. (2012) Jeon et al. 2014, in prep.

14. Spectroscopic confirmation of QSOs at z ~ 5.5 and z ~ 6 Lyα z = 5.3z = 5.0 z = 6.0 Spectroscopic identification of 8 QSOs at z = 5 – 6 (all with 3-4m class telescopes) More spectroscopy to come (BH mass, IGM study) 2014. 11. 03 - 11. 07The 6th KIAS Workshop Jeon, Y., MI, et al. 2014, in prep.

15. Faint Quasar Candidates at z ~ 6 2014. 11. 03 - 11. 07The 6th KIAS Workshop 9 candidates z(AB) ~ 22.5 mag from 90 deg 2 g r i z Y J

16. Selection of Quasars at z ~ 7 Y,J-band coverage + I,z data Quasar at z ~ 7 Brown dwarf 2014. 11. 03 - 11. 07The 6th KIAS Workshop

17. Evolution of Quasars at z > 7? Several candidates  Rapid evolution of quasars at z > 7 2014. 11. 03 - 11. 07The 6th KIAS Workshop

18. High Redshift Clusters > 100s clusters at z < 1: Good agreement with  CDM universe Clusters at z > 1 (Overzier et al. 2008, Kang & Im 2009; Matsuda et al. 2011; Capak et al. 2011,…; 1 < z < 5.3) Some find very massive clusters at z ~ 1.5  trouble with  CDM universe? 2014. 11. 03 - 11. 07The 6th KIAS Workshop

19. High Redshift Clusters and Galaxy Evolution Reversal of SFR-density relation: Difficult to explain with models, controversial, what is the origin? IMS: Large number of galaxies and clusters (120 deg 2 vs. ~1 deg 2 ) 2014. 11. 03 - 11. 07The 6th KIAS Workshop Reversal (Elbaz et al. 2007)No reversal (Ziparo et al. 2014) versus High SF High density z=0 z=1

20. Search for High Redshift Clusters 2014. 11. 03 - 11. 07The 6th KIAS Workshop 3.6 – 4.5 micron z - J Multi-wavelength data  Photometric redshift or color-color diagram  Redshift bin  Identify over-dense area

21. 2014. 11. 03 - 11. 07The 6th KIAS Workshop Cluster at z=1.1  1000 candidates identified

22. For galaxies at z =1, Difference in galaxy properties are due to mass, not environment No reversal in SFR-density relation for massive galaxies SFR quenching due to environ. at z < 1 (reversal in SFR-density rel). 2014. 11. 03 - 11. 07The 6th KIAS Workshop SDSS SDSS (z=0)IMS (z=1) Jae-Woo Kim, MI, et al. 2014

23. Fraction of Quiescent Galaxy At z > 1.4, mass dependent (not environment) At z < 1.4, environment becomes important 2014. 11. 03 - 11. 07The 6th KIAS Workshop log (M * /M ⊙ ) ≥ 9.1 log (M * /M ⊙ ) ≥ 10.0 Passive fraction (N passive /N total ) Seong-Kook Lee, MI, et al. 2014 Red: Cluster Blue: Field

24. GRB, Transients Tidal disruption event: Swift J1644+57 (Burrows et al. 2011, Nature) Long-term (2+ years) monitoring results (Yoon et al. 2014; Im et al. 2014) Christmas Burst, GRB 101225A (Thone et al. 2011, Nature) CQUEAN riz data helpsdetermine the black body radiatoin afterglow 2014. 11. 03 - 11. 07The 6th KIAS Workshop

25. Swift J1644+57 Long-term Light Curve Before host subtraction ∝ t -0.4 After host subtraction ∝ t -1.1 ( c.f. TD ∝ t -5/3 ) 2014. 11. 03 - 11. 07The 6th KIAS Workshop

26. Swift J1644+57 Host Galaxy + BH Mass Log(M BH /M ⊙ ) ~ 6.8 ± 0.5 χ 2 =1.318 Yongmin Yoon, MI, et al. 2014, in prep. 2014. 11. 03 - 11. 07The 6th KIAS Workshop

27. IMS Preliminary Data Release http://ceou.snu.ac.kr (click IMS banner)http://ceou.snu.ac.kr http://astro.snu.ac.kr/~exact/dokuwiki4/dok u.php?id=starthttp://astro.snu.ac.kr/~exact/dokuwiki4/dok u.php?id=start J-band and Y-band Catalogs for Elais-N1, Elais-N2, and SA22 fields are available (About 30 deg 2 ) 2014. 11. 03 - 11. 07The 6th KIAS Workshop

28. Summary Infrared Medium-deep Survey - 120 deg 2 imaging in J and Y (23 AB mag) - CQUEAN imaging of high redshift objects - Transient follow-up 8 quasars at z=5.5 – 6.0 1000+ of z > 1 cluster candidates: environment vs internal mechanism GRBs/TDE/SNe 2014. 11. 03 - 11. 07The 6th KIAS Workshop