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HI in Galaxies at Redshifts 0.1 to 1.0: Observations and Techniques

Explore the HI 21cm emission and coadding technique in galaxies, current observations in star-forming galaxies, and future observations with SKA pathfinders. Learn about the evolution in galaxy clusters and the cosmic star formation rate density. The text delves into the HI gas density, cosmic gas density, and comparisons with Hα emission in star-forming galaxies.

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HI in Galaxies at Redshifts 0.1 to 1.0: Observations and Techniques

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  1. HI in Galaxies at Redshifts 0.1 to 1.0: Current and Future Observations Using Optical Redshifts for HI Coadding Philip Lah Melbourne 2008

  2. Collaborators:Michael Pracy (ANU)Frank Briggs (ANU) Jayaram Chengalur (NCRA) Matthew Colless (AAO)Roberto De Propris (CTIO)

  3. Talk Outline Introduction • Evolution in clusters & star formation rate density vs z • HI 21cm emission & the HI coadding technique Current Observations with the HI coadding technique • HI in star forming galaxies at z=0.24 • HI in Abell 370, a galaxy cluster at z = 0.37 Future Observations with SKA pathfinders • using ASKAP and WiggleZ • using MeerKAT and zCOSMOS

  4. Evolution in Galaxy Clusters

  5. Galaxy Cluster: Coma

  6. Butcher-Oemler Effect

  7. The Cosmic Star Formation Rate Density

  8. SFRD vs z Hopkins 2004

  9. SFRD vs time Hopkins 2004

  10. molecular gas cloud (H2) star formation Neutral atomic hydrogen gas cloud (HI) HI Gas and Star Formation

  11. The Cosmic Neutral GasDensity

  12. The Cosmic Gas Density vs. Redshift Prochaska et al. 2005 DLAs Rao et al. 2006 DLAs from MgII absorption Zwaan et al. 2005 HIPASS HI 21cm

  13. The Cosmic Gas Density vs. Redshift Prochaska et al. 2005 DLAs Rao et al. 2006 DLAs from MgII absorption Zwaan et al. 2005 HIPASS HI 21cm

  14. HI 21 cm Emission

  15. Neutral atomic hydrogen creates 21 cm radiation electron proton

  16. Neutral atomic hydrogen creates 21 cm radiation

  17. Neutral atomic hydrogen creates 21 cm radiation

  18. Neutral atomic hydrogen creates 21 cm radiation

  19. Neutral atomic hydrogen creates 21 cm radiation photon

  20. Neutral atomic hydrogen creates 21 cm radiation

  21. HI 21cm emission HI 21 cm emission decay half life ~10 million years (31014 s) • 1 M 2.0  1033g 1.2  1057 atoms of hydrogen atoms • total HI gas in galaxies ~ 107 to 1010 M • HI emission ~4 1049 to 4 1052 photons per second • HI 21 cm luminosity of ~4 1033 to 4 1036 ergs s-1 • For comparison, in star forming galaxies: • luminosity of H emission ~3  1039 to 3  1042 ergs s-1 • HI 21 cm emission ~106 times less power than H emission

  22. HI 21cm emission HI 21 cm emission decay half life ~10 million years (31014 s) • 1 M 2.0  1033g 1.2  1057 atoms of hydrogen atoms • total HI gas in galaxies ~ 107 to 1010 M • HI emission ~4 1049 to 4 1052 photons per second • HI 21 cm luminosity of ~4 1033 to 4 1036 ergs s-1 • For comparison, in star forming galaxies: • luminosity of H emission ~3  1039 to 3  1042 ergs s-1 • HI 21 cm emission ~106 times less power than H emission

  23. HI 21cm emission HI 21 cm emission decay half life ~10 million years (31014 s) • 1 M 2.0  1033g 1.2  1057 atoms of hydrogen atoms • total HI gas in galaxies ~ 107 to 1010 M • HI emission ~4 1049 to 4 1052 photons per second • HI 21 cm luminosity of ~4 1033 to 4 1036 ergs s-1 • For comparison, in star forming galaxies: • luminosity of H emission ~3  1039 to 3  1042 ergs s-1 • HI 21 cm emission ~106 times less power than H emission

  24. HI 21cm emission HI 21 cm emission decay half life ~10 million years (31014 s) • 1 M 2.0  1033g 1.2  1057 atoms of hydrogen atoms • total HI gas in galaxies ~ 107 to 1010 M • HI emission ~4 1049 to 4 1052 photons per second • HI 21 cm luminosity of ~4 1033 to 4 1036 ergs s-1 • For comparison, in star forming galaxies: • luminosity of H emission ~3  1039 to 3  1042 ergs s-1 • HI 21 cm emission ~106 times less power than H emission

  25. HI 21cm emission HI 21 cm emission decay half life ~10 million years (31014 s) • 1 M 2.0  1033g 1.2  1057 atoms of hydrogen atoms • total HI gas in galaxies ~ 107 to 1010 M • HI emission ~4 1049 to 4 1052 photons per second • HI 21 cm luminosity of ~4 1033 to 4 1036 ergs s-1 • For comparison, in star forming galaxies: • luminosity of H emission ~3  1039 to 3  1042 ergs s-1 • HI 21 cm emission ~106 times less power than H emission

  26. HI 21cm emission HI 21 cm emission decay half life ~10 million years (31014 s) • 1 M 2.0  1033g 1.2  1057 atoms of hydrogen atoms • total HI gas in galaxies ~ 107 to 1010 M • HI emission ~4 1049 to 4 1052 photons per second • HI 21 cm luminosity of ~4 1033 to 4 1036 ergs s-1 • For comparison, in star forming galaxies: • luminosity of H emission ~3  1039 to 3  1042 ergs s-1 • HI 21 cm emission ~106 times less power than H emission

  27. HI 21cm emission HI 21 cm emission decay half life ~10 million years (31014 s) • 1 M 2.0  1033g 1.2  1057 atoms of hydrogen atoms • total HI gas in galaxies ~ 107 to 1010 M • HI emission ~4 1049 to 4 1052 photons per second • HI 21 cm luminosity of ~4 1033 to 4 1036 ergs s-1 • For comparison, in star forming galaxies: • luminosity of H emission ~3  1039 to 3  1042 ergs s-1 • HI 21 cm emission ~106 times less power than H emission

  28. HI 21cm Emission at High Redshift

  29. HI 21cm emission at z > 0.1 • single galaxy at z = 0.176  WSRT 200 hours (Zwaan et al. 2001, Science, 293, 1800) • single galaxy at z = 0.1887 VLA ~80 hours (Verheijen et al. 2004,in IAU Symposium Vol 195, p. 394) • two galaxy clusters at z = 0.188 and z = 0.206 WSRT 420 hours 42 galaxies detected  HI gas masses 5109 to 41010 M (Verheijen et al. 2007, ApJL, 668, L9) • galaxies with redshifts z = 0.17 to 0.25 observed with Arecibo  detected 26 from 33 observed  HI gas masses (2 to 6) 1010 M (Catinella et al. 2007, in IAU Symposium Vol 235, p. 39)

  30. HI 21cm emission at z > 0.1 • single galaxy at z = 0.176  WSRT 200 hours (Zwaan et al. 2001, Science, 293, 1800) • single galaxy at z = 0.1887 VLA ~80 hours (Verheijen et al. 2004,in IAU Symposium Vol 195, p. 394) • two galaxy clusters at z = 0.188 and z = 0.206 WSRT 420 hours 42 galaxies detected  HI gas masses 5109 to 41010 M (Verheijen et al. 2007, ApJL, 668, L9) • galaxies with redshifts z = 0.17 to 0.25 observed with Arecibo  detected 26 from 33 observed  HI gas masses (2 to 6) 1010 M (Catinella et al. 2007, in IAU Symposium Vol 235, p. 39)

  31. HI 21cm emission at z > 0.1 • single galaxy at z = 0.176  WSRT 200 hours (Zwaan et al. 2001, Science, 293, 1800) • single galaxy at z = 0.1887 VLA ~80 hours (Verheijen et al. 2004,in IAU Symposium Vol 195, p. 394) • two galaxy clusters at z = 0.188 and z = 0.206 WSRT 420 hours 42 galaxies detected  HI gas masses 5109 to 41010 M (Verheijen et al. 2007, ApJL, 668, L9) • galaxies with redshifts z = 0.17 to 0.25 observed with Arecibo  detected 26 from 33 observed  HI gas masses (2 to 6) 1010 M (Catinella et al. 2007, in IAU Symposium Vol 235, p. 39)

  32. HI 21cm emission at z > 0.1 • single galaxy at z = 0.176  WSRT 200 hours (Zwaan et al. 2001, Science, 293, 1800) • single galaxy at z = 0.1887 VLA ~80 hours (Verheijen et al. 2004,in IAU Symposium Vol 195, p. 394) • two galaxy clusters at z = 0.188 and z = 0.206 WSRT 420 hours 42 galaxies detected  HI gas masses 5109 to 41010 M (Verheijen et al. 2007, ApJL, 668, L9) • galaxies with redshifts z = 0.17 to 0.25 observed with Arecibo  detected 26 from 33 observed  HI gas masses (2 to 6) 1010 M (Catinella et al. 2007, in IAU Symposium Vol 235, p. 39)

  33. Coadding HI signals

  34. Coadding HI signals Radio Data Cube Frequency HI redshift DEC RA

  35. Coadding HI signals Radio Data Cube Frequency HI redshift DEC positions of optical galaxies RA

  36. Coadding HI signals flux frequency

  37. Coadding HI signals z2 z1 z3 flux frequency

  38. Coadding HI signals HI signal z2 z1 z3 velocity flux frequency

  39. Current Observations -HI coadding

  40. Giant Metrewave Radio Telescope

  41. Giant Metrewave Radio Telescope

  42. Giant Metrewave Radio Telescope

  43. Anglo-Australian Telescope

  44. 2dF/AAOmega instrument multi-object, fibre fed spectrograph

  45. The Fujita galaxies H emission galaxies at z = 0.24

  46. The Subaru Telescope

  47. The Surprime-cam filters H at z = 0.24

  48. Narrowband Filter: Hα detection

  49. DEC RA The Fujita Galaxies Subaru Field 24’ × 30’ narrow band imaging  Hα emission at z = 0.24 (Fujita et al. 2003, ApJL, 586, L115) 348 Fujita galaxies 121 redshifts using AAT GMRT ~48 hours on field

  50. SFRD vs z - Fujita Hopkins 2004 Fujita et al. 2003

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