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The relation between the galaxy stellar mass distribution and the mass of its hosting halo. BENEDETTA VULCANI KAVLI IPMU. In collaboration with Bianca Poggianti Gabriella De Lucia Alan Dressler Kevin Bundy. What Regulates Galaxy Evolution? - 2013, April 22 th -26 th. - PowerPoint PPT Presentation
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The relation between the galaxy stellar mass
distribution and the mass of its hosting halo
BENEDETTA VULCANIKAVLI IPMU
What Regulates Galaxy Evolution? - 2013, April 22th-26th
In collaboration withBianca PoggiantiGabriella De LuciaAlan DresslerKevin Bundy
THE ENVIRONMENTThe properties of galaxies correlate with the environment: Morphology density relation (Dressler 1980, Dressler+ 1997) Denser environments host more massive, redder galaxies with lower
star-formation rates (Kauffmann+ 2004) Galaxies in different environments evolve with different timescales
..But various galaxy properties are strongly correlated even in a fixed environment.. What Regulates Galaxy Evolution? - 2013, April 22th-26th
How are the mass and environment related?
What Regulates Galaxy Evolution? - 2013, April 22th-26th
The field mass function(e.g. Fontana+ 2006, Bundy+ 2006, Franceschini+ 2006, Borch+ 2006, Vergani+ 2008, Drory+09, Pozzetti+ 2011)
For high mass galaxies, the evolution of the total mass function from z = 1 to z = 0 is relatively modestLow mass galaxies evolve more than high mass galaxies
Ilbert+ 2010
What Regulates Galaxy Evolution? - 2013, April 22th-26th
Several studies have analyzed separately galaxies of different types (colors, star formation activity, structural parameters, morphologies)
Vergani+ 2008
Pannella+ 2006
Borch+ 2006
What Regulates Galaxy Evolution? - 2013, April 22th-26th
AND IN CLUSTERS?
What Regulates Galaxy Evolution? - 2013, April 22th-26th
ESO Distant Cluster Survey (EDisCS - White+ 2005): Optically selected clusters (σ>400 km/s) and groups (150<σ<400 km/s) at 0.4<z<0.8 Deep optical photometry in B,V,I or V,R,IDeep spectroscopyWide-field imaging
Stellar masses from the relation between LB and B-V color (Bell & De Jong 2001)
WIde field Nearby Galaxy-cluster Survey (WINGS - Fasano+ 06): X rays selected cluster (σ>500 km/s) at 0.04<z<0.07 U,B,V and J,K photometrySpectroscopy
The cluster mass function
Vulcani et al. (2011)
Evolution driven by the mass growth of star forming galaxies in both clusters and in the cluster surrounding areas.
+ MORPHOLOGICAL TRANSFORMATION
z=0.6
z=0.07
What Regulates Galaxy Evolution? - 2013, April 22th-26th
IMACS Cluster Building Survey (ICBS - Oemler+ 2013):Cluster selected using the Red Sequence Cluster Survey method (Gladders and Yee 2000) at 0.25<z<0.5IMACS wide fieldBroad band photometry in B,V,R,I or g,r,i,z Spectroscopic data of clusters, groups and field
The shape of the MF does not depend on global environmentVulcani et al. (2013)
The MF in different environments
field
clusters
clustersgroups
What Regulates Galaxy Evolution? - 2013, April 22th-26th
The red/blue MF
Red and blue MF are different, but no differences detected in MF in different environments, for red and blue galaxies separately
Vulcani et al. (2013)
What Regulates Galaxy Evolution? - 2013, April 22th-26th
Padova Millennium Galaxy Group Catalog (PM2GC – Calvi, Poggianti, BV 2011):
Spectroscopic data of ~38deg2 at 0.04<z<0.1 from the Millennium Galaxy Catalog (Lieske+2003)
Deep and wide B-imaging
Rich sample of groups, binary systems and isolated galaxies
The MF in different environmentsLow-z
Calvi, Poggianti, BV, Fasano (2013)What Regulates Galaxy Evolution? - 2013, April 22th-26th
The evolution
INDEPENDENT OF ENVIRONMENT!Vulcani et al. (2013)What Regulates Galaxy Evolution? - 2013, April 22th-26th
Help from the simulations
What Regulates Galaxy Evolution? - 2013, April 22th-26th BV, De Lucia, Poggianti in prep.
What Regulates Galaxy Evolution? - 2013, April 22th-26th
The predicted evolution
BV, De Lucia, Poggianti in prep.
What Regulates Galaxy Evolution? - 2013, April 22th-26th
The dependence on halo mass
BV, De Lucia, Poggianti in prep.
MY QUESTIONS1 Why doesn’t the global envirnoment
affect galaxy masses?2 What is the role of the environment at
lower masses?3 Why do simulations overpredict the
number of low mass galaxies?
What Regulates Galaxy Evolution? - 2013, April 22th-26th
SUMMARY Both at high and low -z, the total mass function does
not depend on environment. At high-z, red and blue MF are different, but no
differences are detected in MF in different environments, for red and blue galaxies separately.
The evolution of the mass function is very similar in all the environments.
Semianalytic models can reproduce only the observed field mass function at low-z. As a consequence, they do not reproduce neither the observed evolution nor the independence of the mass function on the environment.
What Regulates Galaxy Evolution? - 2013, April 22th-26th
What Regulates Galaxy Evolution? - 2013, April 22th-26th