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Search for High-Redshift Galaxies

Search for High-Redshift Galaxies. Wei Zheng Johns Hopkins University. Power of CLASH Survey. Data in about 300 square arcminutes: comparable to GOODS Data in about 100 square arcminutes in cluster fields: comparable to HUDF

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Search for High-Redshift Galaxies

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  1. Search for High-Redshift Galaxies Wei Zheng Johns Hopkins University

  2. Power of CLASH Survey • Data in about 300 square arcminutes: comparable to GOODS • Data in about 100 square arcminutes in cluster fields: comparable to HUDF • Accurate photometric redshifts and mass distribution maps enhance selection confidence Granada

  3. Faintness of High-Z Galaxies Spectroscopic capability of ground based telescopes: AB≈25 Spectroscopic capability of JWST: AB≈27 Granada

  4. New Findings in A1703 H J z i Granada

  5. Goals • Find more than 100 galaxies at z>7 • Spectroscopic followup of bright candidates • Morphology of young galaxies • Complimentary study of the luminosity distribution • Pathfinder for JWST studies of high-z galaxies Granada

  6. Cluster MACS J1149+22 Granada

  7. Color Selection Granada

  8. Special Pipeline • Detection Images from the reddest bands F160W: z≈10.5 F160W+F140W: z≈9 F160W+F140W+F125W: z≈8 F160W+F140W+F125W+F110W: z≈6.5 • Catalogs in each passband • Dropout catalog • Stamp images for inspection Granada

  9. Working Group • Assignment: Adopt a cluster • Quick report within a week of data acquisition • Prompt publication within a month • Statistical studies at longer time scales Granada

  10. Test Runs • Using published results: UDF A2218 • SED fitting • amplification map Granada

  11. Spectroscopic Followup • VLT: X-shooter, SINFONI, ISSAC • Magellan: FIRE • GEMINI-N: GNIRS, FLAMINGO-2 • Letter of intention to the director? Granada

  12. Summary • CLASH provides an unprecedented opportunity for high-z search • Selection procedures to be developed and tested • Prompt publication is essential Granada

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