Satellites of Satellites

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Brian Preston
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1 Satellites of Satellites Globular Cluster Systems as Tracers of Environmental Effects on Early-Type Virgo Dwarfs Small Stellar Systems in Tuscany , Prato, Italy

2 Satellites of Satellites Globular Cluster Systems as Tracers of Environmental Effects on Early-Type Virgo Dwarfs R. Smith, J.A.L. Aguerri, T. Puzia, M. Fellhauer Small Stellar Systems in Tuscany , Prato, Italy

3 Cluster earlty-type dwarfs early or late origin? We suggest that Sph galaxies are transformed, red and dead Scd-Im galaxies Kormendy & Bender (2012)

4 Cluster earlty-type dwarfs early or late origin? Evidence from late (< 6 Gyr) red sequence buildup at low masses similar shapes, structure and kinematics presence of disc-like components

5 Cluster earlty-type dwarfs early or late origin? Interaction mechanisms hydrodynamical ISM-ICM interactions galaxy-galaxy and galaxy-cluster gravitational interactions

6 Mechanisms operate in multiple regions and on different timescales degeneracy Treu et al. (2003)

7 GCSs can be excellent tracers of evolutionary mechanisms VCC1087 old (>10 Gyr) abundant spatially extended Beasley et al. (2006)

8 GCSs can be excellent tracers of evolutionary mechanisms Not altered by recent hydro mechanisms; modified by gravitational interactions VCC1087 old (>10 Gyr) abundant spatially extended Beasley et al. (2006)

9 The high GC mass specific frequencies of massive Virgo des T N = N GC / (M * / 10 9 M ) RSJ & Aguerri (2012)

10 disfavour stellar mass-stripping evolutionary mechanisms T N = N GC / (M * / 10 9 M ) Virgo des disc galaxies mass stripping under impulse approximation RSJ & Aguerri (2012)

11 The high GC mass specific frequencies of massive Virgo des RSJ & Aguerri (2012)

12 The high GC mass specific frequencies of massive Virgo des RSJ & Aguerri (2012)

13 disfavour a recent origin from gas- or stellar mass-stripped field dirr Virgo des field dirrs RSJ & Aguerri (2012)

14 Earlier dwarf (sub)types contain richer GCSs Metal-poor GC mass specific frequency de(n) de(nn) de(di,bc) dirr M* > 108 M T N = N GC / (M * / 10 9 M )

15 Innermost des have richer GCSs opposite to what predicted from mass-stripping mechanisms final bound M * fraction from Mastropietro+05 RSJ & Aguerri (2012)

16 Biased GC formation towards dense environments in the Millennium inner des have: - older SPs - higher SFRs and Σ SFR enhanced GC-to-stars formation Peng et al. (2008)

17 The impact of galaxy harassment on the GCSs of Virgo des static Virgo-sized cluster + dynamic substructure plunging and circular orbits 8 different realizations 3-component de model M * = 3x10 9 M 60 metal poor GCs 0.01 < M * /M DM < 0.1 Smith, RSJ et al. (2013)

18 Strong dependece on final DM content orbit type and specific tidal history orbit type stochasticity spatial distribution Smith, RSJ et al. (2013)

19 Kinematics of the GCS can be used to estimate enclosed mass factor 2 accuracy Smith, RSJ et al. (2013)

20 Bound GCs may spatially expand up to factor ~2 from initial configuration mild expansion Smith, RSJ et al. (2013)

21 i) The tidal evolution of des and their GCSs using cosmological simulations Follow detailed orbital and interaction histories Gill et al. 2004

22 ii) Kinematics and metallicities of GCs in transition Virgo des VCC856

23 ii) Kinematics and metallicities of GCs in transition Virgo des N GC ~ 40 VCC856 Jerjen et al. 2000

24 iii) A complete census of GCSs in Virgo dwarfs from the NGVS stellar mass position morphological type The Next Generation Virgo Cluster Survey - PI Ferrarese

25 Mind the (evolutionary) gap...present day des and dirrs may share a common ancestor, just as humans and apes do, but (most) des do not evolve from dirrs, just as (most) humans do not evolve from apes Skillman & Bender (1995)

28 Kinetic energy increase in the impulse approximation energy gain from outside-in adiabatic + extended perturber correction (Gnedin+99)

29 The high GC mass specific frequencies of Virgo dirrs Virgo dirrs field dirrs

30 Beasley et al. 2006

Satellites of satellites: globular cluster systems as tracers of environmental effects on Virgo early-type dwarfs

Satellites of satellites: globular cluster systems as tracers of environmental effects on Virgo early-type dwarfs Rubén Sánchez-Janssen (ESO, Chile) J.A.L. Aguerri (IAC, Spain) (MNRAS submitted) Dynamics