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Tidal Debris in Galaxy Cluster Cores

Tidal Debris in Galaxy Cluster Cores. Allison Strom David Sand. ASGC Statewide Symposium / April 19, 2008. Outline. Motivations Sample Selection Methodology Results Future Direction. ASGC Statewide Symposium / April 19, 2008. Intracluster Light. 20% of light from galaxy clusters

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Tidal Debris in Galaxy Cluster Cores

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  1. Tidal Debris in Galaxy Cluster Cores Allison Strom David Sand ASGC Statewide Symposium / April 19, 2008

  2. Outline • Motivations • Sample Selection • Methodology • Results • Future Direction ASGC Statewide Symposium / April 19, 2008

  3. Intracluster Light • 20% of light from galaxy clusters • Trace cluster potential • Origin(s) unknown Krick & Bernstein, 2004 ASGC Statewide Symposium / April 19, 2008

  4. Intracluster Light Van Dokkum, 2005 ASGC Statewide Symposium / April 19, 2008

  5. 15 galaxy clusters from ACS archives X-ray luminous 0.05<z<0.3 F606W filter The Sample ACO 141 ACO 368 ACO 781 ACO 2187 ACO 2813 ACO 2895 ACO 3084 ACO 3088 ACO 3140 ACO 3192 ACO 3292 ACO 3364 RBS 436 RBS 651 RBS 819 ASGC Statewide Symposium / April 19, 2008

  6. Isolating the Features present none ASGC Statewide Symposium / April 19, 2008

  7. Isolating the Features ASGC Statewide Symposium / April 19, 2008

  8. ACO 368 ACO 781 ACO 2813 ACO 3192 ACO 3292 RBS 651 RBS 819 ACO 141 ACO 2187 ACO 2895 ACO 3084 ACO 3088 ACO 3140 ACO 3364 RBS 436 ASGC Statewide Symposium / April 19, 2008

  9. Region Apertures ACO 141 ACO 2187 ACO 2895 ACO 3084 ACO 3088 ACO 3140 ACO 3364 RBS 436 ASGC Statewide Symposium / April 19, 2008

  10. Characteristic Properties ASGC Statewide Symposium / April 19, 2008

  11. What Next? • More rigorous isolation of diffuse light • Test detection limit • Identify progenitors • visually • spectroscopy ASGC Statewide Symposium / April 19, 2008

  12. Summary • Tidal debris is fairly common • Occur as “fans” or “sprays” of stars • Likely one origin for ICL • Properties • luminosities approximately 1/10 of the Milky Way • Sizes from 1/2 to over 4 times the Milky Way ASGC Statewide Symposium / April 19, 2008

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