Ricardo Muñoz The Structural Properties of Milky Way Dwarf Galaxies (Universidad de Chile) Collaborators: Marla Geha (Yale) Patrick Côté (HIA/DAO) Peter Stetson (HIA/DAO) Josh Simon (Carnegie) George Djorgovski (Caltech) Felipe Santana (U. de Chile) Dwarf Galaxies (post-2005) Dwarf Galaxies (pre-2005) Milky Way inner 100 kpc
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The Structural Properties of Milky Way Dwarf Galaxies · Felipe Santana (U. de Chile) Dwarf Galaxies (post-2005) Dwarf Galaxies (pre-2005) Milky Way inner 100 kpc. 2004: Eleven known
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Ricardo Muñoz
The Structural Properties of Milky Way Dwarf Galaxies
(Universidad de Chile)
Collaborators:
Marla Geha (Yale)
Patrick Côté (HIA/DAO) Peter Stetson (HIA/DAO) Josh Simon (Carnegie) George Djorgovski (Caltech) Felipe Santana (U. de Chile)
Dwarf Galaxies (post-2005)
Dwarf Galaxies (pre-2005)
Milky Wayinner 100 kpc
2004: Eleven known Milky Way satellite galaxies.Visual searches provide no evidence for a larger population . . . (Simon & Blitz 2002, Willman et al. 2002, Whiting et al. 2002)
2005-present: SDSS has revolutionized the field
Belokurov et al. (2006)
tidal stream
2005-present: SDSS has revolutionized the field
Belokurov et al. (2006)
globular
clusters
tidal stream
2005-present: SDSS has revolutionized the field
Belokurov et al. (2006)
new dwarf
globular
clusters
tidal stream
2005-present: SDSS has revolutionized the field
Belokurov et al. (2006)
Sloan Digital Sky Survey (SDSS) coverage
The New Milky Way Dwarf Galaxy Landscape
Name Year DiscoveredLMC B.CSMC B.CSculptor 1937Fornax 1938Leo II 1950Leo I 1950Ursa Minor 1954Draco 1954Carina 1977Sextans 1990Sagittarius 1994Ursa Major I 2005Willman I 2005Ursa Major II 2006Bootes I 2006Canes Venatici I 2006Canes Venatici II 2006Coma Berencies 2006Segue I 2006Leo IV 2006Hercules 2006Leo T 2007Bootes II 2007
Leo V 2008
Belokurov et al. (2006)
The Satellite Numbers:Classical dSphs = 11Ultra-Faint dwarfs = 17
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To SDSS depth, full sky = 11 + 4x17 ≈ 80
To LSST depth, full sky > 400 MW dwarfs
Segue II 2009Pisces I 2009
Pisces II 2010Bootes III 2009
How faint are the Milky way dwarfs?
from http://chandra.as.utexas.edu/~kormendy/dm.html