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Dwarf galaxies in the Canes Venatici Cloud

Dwarf galaxies in the Canes Venatici Cloud. Roman UKLEIN, Dmitry MAKAROV and Lidia MAKAROVA SAO RAS, Russia. Nizhny Arkhyz, KChR, Russia September, 14 – 18, 2009. NDG 2009. Distribution of the galaxies with V LG <550 km/s (Local Volume). M81. Canes Venatici. Virgo. CenA.

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Dwarf galaxies in the Canes Venatici Cloud

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  1. Dwarf galaxies in the Canes Venatici Cloud Roman UKLEIN, Dmitry MAKAROV and Lidia MAKAROVA SAO RAS, Russia Nizhny Arkhyz, KChR, Russia September, 14 – 18, 2009 NDG 2009

  2. Distribution of the galaxieswith VLG<550 km/s (Local Volume) M81 Canes Venatici Virgo CenA VLG, km/s

  3. Radial velocity histogramin the CVn region

  4. Distribution of the galaxiesin theCVn

  5. AdvancedTRGB-method(Makarov+, 2006)

  6. Color-Magnitude Diagrams good good bad

  7. Distance Errors ~5-6% up to 25% good bad

  8. 3Dstructure:

  9. View on Supergalactic plane

  10. Old Hubble Diagram

  11. New Hubble Diagram

  12. New Hubble Diagram R0 ~ 1 Mpc

  13. The Mass Estimation ~3.5 *Heisler, Tremaine & Bahcall (1985)

  14. Mass-to-Luminosity ratio M / LB~100-200 LB,total = 2.3·1010Lsun

  15. Conclusions: • The homogeneous distances to the galaxies in the CVn I Cloud were determined using advanced TRGB method. • We clarify the spatial structure: the cloud is divided on the core and foreground outskirt. What’s farther? • The dynamical mass of the CVn I Cloud much the same as masses of groups like Local Group.

  16. THANK YOU FOR YOUR ATTENTION!

  17. Properties of the CVn I galaxies D W A R F S

  18. M/L estimation for nearby groups

  19. Luminosity Function

  20. Distance-Luminosity

  21. NGC 4214

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