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Halos of Galaxies & Quasars Doron Chelouche (IAS)

Halos of Galaxies & Quasars Doron Chelouche (IAS). The Gaseous Halos of Galaxies and Quasars. Doron Chelouche Institute for Advanced Study, Princeton. and… B. Ménard (CITA), D. Bowen (Princeton), O. Gnat (Caltech/TAU) and many others!.

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Halos of Galaxies & Quasars Doron Chelouche (IAS)

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  1. Halos of Galaxies & Quasars Doron Chelouche (IAS) The Gaseous Halos of Galaxies and Quasars Doron Chelouche Institute for Advanced Study, Princeton and… B. Ménard (CITA), D. Bowen (Princeton), O. Gnat (Caltech/TAU) and many others! • Strong MgII Absorbers • A Proposed Model • Quasar Halos Outline

  2. Halos of Galaxies & Quasars Doron Chelouche (IAS) observations Bahcall & Spitzer (1969): Absorbers are related to galaxies

  3. Halos of Galaxies & Quasars Doron Chelouche (IAS) Rmax Steidel et al. (1994-1997) Mo & Miralda-Escude (1996) Fukugita & Peebles (2005) • Galaxies : 0.07-3L* • Unit covering factor up to Rmax • Rmax ~ Lα (α~0.1―0.4) • Metalicity (~0.1 solar) • No correlation w/galaxy inclination and or rotation observations

  4. Halos of Galaxies & Quasars Doron Chelouche (IAS) Covering factor for REW>0.6A absorber • SDSS: 106 photometric quasars • Several dozens of close (<100kpc) separation pairs (observed w/APO & HET) observations

  5. Halos of Galaxies & Quasars Doron Chelouche (IAS) Rauch et al. (2002) adopted from Rao et al. (2006) a model Lanzetta & Bowen 1992

  6. Halos of Galaxies & Quasars Doron Chelouche (IAS) For an L* (MgII absorbing) galaxy @z~1: a model

  7. Halos of Galaxies & Quasars Doron Chelouche (IAS) Quasars

  8. Halos of Galaxies & Quasars Doron Chelouche (IAS) Christensen et al. 2006 Quasars

  9. Halos of Galaxies & Quasars Doron Chelouche (IAS) ~10L* ~1L* ~0.1L* • Do MgII absorbers lie in special environments (massive halos? groups?) • How different are quasar environments from galaxy ones • Unification on large scales • Implications for galaxy/quasar reionization effects? • Studying absorbers by emission • (metalicity/mass) Questions

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