Grism Spectroscopy of Clusters and the Early Universe

Transcription

1 The rism ens- mplified sssssurvey from pace ( ) Grism Spectroscopy of Clusters and the Early Universe UCSB (now AIP) The Team

2 HST Grism Spectroscopy of 10 massive clusters - Incl. the 6 Hubble Frontier Fields & 8 CLASH Clusters Wavelength coverage: Cluster Core: Parallel Fields: 0.4 (G102 + G141) (G800L) G800LG800L G800L F814WF814W F814W G102 G102 G800L G102 G800L F105WF105W F814W F105W G141 G F814W G141 G141 G102 F140WF140W F105W F140W 0.1 F105W G G141 F140W F140W Kasper B. Schmidt Å Å 5500Å Å ACS G800L & F814W on parallel pointings z(h ) [0.0,1.5] Throughput Throughput z(ly ) z(ly ) [3.5,12.7] z(ly ) [3.5,12.7] [3.5,12.7] z([oii]) z([oii]) [0.5,3.5] z([oii]) [0.5,3.5] [0.5,3.5] z(h /[OIII]) [0.1,2.3] z(h /[OIII]) [0.1,2.3] z(h /[OIII]) [0.1,2.3] 0.6 [0.0,1.5] 0.6z(H ) [0.0,1.5] z(h ) [3.5,12.7] [0.0,1.5] z(h ) z(ly ) z(ly ) [3.5,12.7] z([oii]) [0.5,3.5] z(h /[OIII]) [0.1,2.3] z([oii]) [0.5,3.5] 0.6 z(h ) [0.0,1.5] 0.5 z(h 0.5 /[OIII]) [0.1,2.3] Throughput Throughput Throughput P.I. Tommaso Treu (UCLA) WFC3 G102 & F105W on cluster core WFC3 G141 & F140W on cluster core Wavelength [A ] Wavelength [A ] Wavelength [A ] D-HST10000 Yale, November 16[2015 Wavelength A ]

3 P.I. Tommaso Treu (UCLA) HST Grism Spectroscopy of 10 massive clusters - Incl. the 6 Hubble Frontier Fields & 8 CLASH Clusters Wavelength coverage: - Cluster Core: 8000Å Å (G102 + G141) - Parallel Fields: 5500Å Å (G800L) Spectroscopic limits 5e-18 erg/s/cm 2 (excl. 2 PAs and μ) Data acquisition completed January 2015 Spectra of ~ (mf140w < 24) Details about the survey - KBS et al. (2014), Treu, KSB et al. (2015), glass.astro.ucla.edu 2

4 L A S S Observing Strategy x Ancillary Data G L A S S Data Treu, KBS et al. (2015) 3

5 L A S S Observing Strategy x Ancillary Data G L A S S Data G102 Orient 2 G102 Orient 1 Treu, KBS et al. (2015) 3

6 L A S S Observing Strategy x 2 PAs benefits: - Account for contamination in crowded clusters - Identify and detect (faint) emission lines G102 PA1 G102 PA2 G102 PA1 G102 PA2 4

7 G Data Releases v001 Main products of data releases: - Redshift catalog incl. emission line sources and mh < 23 obj. - GUIs for inspecting the G L A S S data products; GiG & GiGz - 2 NIR grisms x 2 PA reduced spectra for all objects detected including contamination and continuum models Data Release Schedule: Treu, KBS et al. (2015) A2744 A370 MACS MACS MACS MACS RXJ MACS MACS RXJ2248 Imminent Early 2016 Early 2016 (z-cat available) Released Early 2016 Imminent Released Released Released Released 5

8 G L A S S MAST DATA ACCESS 6

9 G L A S S MAST DATA ACCESS 6

10 G L A S S MAST DATA ACCESS 6

11 CurrentGAL AS Science 1) Asses the environmental dependence of galaxy evolution - Vulcani et al. (2015) 2) Describe how metals cycle in and out of galaxies - Jones et al. (2015), see Tucker s talk tomorrow 3) Investigate the gas and galaxies at the EoR - KBS et al. (2015, on arxiv today) Lens modeling of the G L A S S clusters - Wang et al. (2015) (A2744) - Hoag et al. (2016) in prep (MACS0416) Search for SN in the G L A S S FoVs - Kelly et al. (2015) (SN Refsdal discovery) 7

12 GGGLA Galaxies at the EoR (z 7) Selected dropouts at z 7 in 6 first completed clusters - A2744, MACS0717, MACS1423, MACS2129, RXJ1347, RXJ2248 Used >20 photometric selections: - Photo-z methods: EAzY (Brammer et al. 2008) - Color selections: i, z, Y, J, JH dropouts - Selections published in the literature, Atek et al. (2013), Ishigaki et al. (2014), Bradley et al. (2014), Karman et al.(2014), etc. Resulted in more than 150 z 7 galaxy candidates All G L A S S spectra of these objects visually inspected by at least 2 team members to search for Lyα emission. 24 potential Lyα emitters KBS et al (2015, on arxiv today) 8

13 KBS et al (2015, on arxiv today) GGGLA Galaxies at the EoR (z 7) Stack of Lyα emitters looking for rest-frame UV lines Lyα (obviously) seen No Continuum detection No Detection of CIV & CIII] - [fciv 2σ / flyα] < [fciii] 2σ / flyα] <

14 KBS et al (2015, on arxiv today) GGGLA Galaxies at the EoR (z 7) Extracting spatial profile of Lyα at z 7 from stack Comparison to LARS galaxies simulated at high-z Grism Dispersion Spatial Lyα Spatial profile PSF (from stars) min(χ 2 ) Gauss * PSF rest-uv Direct Img arcsec arcsec No spatially extended Lyα detected in the z ~ 7.2 LAE stack 1 arcsec 1 arcsec 10

15 Summary G L A S S data acquisition has been completed (Jan. 2015) - 5/10 v001 data releases available; see Treu, KBS et al. (2015) - All 10 clusters to be released by early 2016 via MAST G L A S S science is well underway: - Incl. metallicity, environment, supernova, and high-z studies G L A S S spectra on first 6 clusters incl. 24 potential z 7 LAEs No spatially extended Lyα at z~7.2 detected in LAE stack 11

16 glass.astro.ucla.edu - T. Treu (PI) - M. Bradac, G. B. Brammer, M. Dijkstra, A. Dressler, A. Fontana, R. Gavazzi, L. Guaita, A. L. Henry, A. Hoag, K.-H. Huang, T. A. Jones, P. L. Kelly, M. A. Malkan, C. Mason, L. Pentericci, B. Poggianti, M. Stiavelli, M. Trenti, A. von der Linden, B. Vulcani, X. Wang are here 12