Mass, Gas and Galaxies in the Abell 901/902 Supercluster

44 Pages·2008·13.39 MB·English

Mass, Gas and Galaxies in the Abell
901/902 Supercluster
Catherine Heymans
on behalf of the STAGES collaboration
(PI: Meghan Gray)
University of British Columbia, Vancouver.
Canadian Institute for Theoretical Astrophysics, Toronto.
Institute d’Astrophysique de Paris.
STAGES
Collaborators
Nottingham Texas MPIA Heidelberg AIP Postdam
M Gray (PI) S Joghee HW Rix L Witozski
K Lane J Caldwell E Bell A Boehm
• 80 orbit mosaic
A Aragón-Salamanca F Barazza K Meisenheimer
O Almaini R Somerville
• ACS + WFPC2/NIC3
I Trujillo S Koposov
parallels
K Jahnke
Edinburgh HIA B Häußler CAHA
• science exploitation
D Bacon Victoria X Zheng S Sanchez
underway
A Taylor C Peng A Pasquali
• second largest HST
Oxford UBC UMass ESO/Chile
mosaic
C Wolf C Heymans D McIntosh R Gilmour
L Van Waerbeke
• sister survey to GEMS/
CDFS
Innsbruck Arizona Columbia Waterloo
M Barden C Papovitch B Johnson M Balogh
• Data public 20th Feb
E van Kampen
2008!
image: COMBO-17
Catherine Heymans LBL 22nd Jan 2008
Outline
✴
The STAGES survey
• Galaxy evolution in dense environments
✴
“Seeing the invisible”: mapping the dark
matter environment of Abell 901/902
• Weak gravitational lensing
✴
First galaxy evolution results from the Abell
901/902 laboratory
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The Abell 901/902 Supercluster
30x30 arcmin image of the A901/2 supercluster at z=0.165
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A901a A901b
A902 SW group
Ground-based images from COMBO-17
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COMBO-17
✴
5 broad band + 12
narrow band filters
%) ✴ Photometric redshifts to
(

E
Q R<24, accuracy ~0.02
✴
Clean selection of
supercluster galaxies
λ / nm
Wolf et al 2004
(3%/15% contamination)
✴
Spectral Energy
Distributions; age, dust,
metalicity
✴
σ ∼ . z Star formation history
0 02(1 + )
z
✴
Stellar mass estimate
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STAGES:
Space Telescope A901/902 Galaxy Evolution Survey

Hubble Space Telescope 80 orbit mosaic; ACS, NICMOS, WFPC
(M.E Gray) morphologies, weak gravitational lensing
COMBO-17 survey 17-band optical imaging:
(C. Wolf) photo-zs + SEDs for 15000 objects
Omega2000 @ Calar Alto near-infrared extension (Y, J1, J2, H):
(K. Meisenheimer) M*, photo-zs
2dF spectrograph spectroscopy of ~300 cluster galaxies:
(M. E. Gray) dynamics, star-formation histories
XMM-Newton 90 ks X-ray imaging/spectroscopy:
(R. Gilmour) ICM, AGN
Spitzer infrared imaging (8 and 24 µm):
(E. F. Bell) obscured star formation, AGN
GALEX NUV + FUV imaging:
(GALEX team) unobscured star formation
GMRT radio imaging (610 and 1400MHz)
(D. Green) obscured SF, AGN
constrained simulations N-body + hydro + semi-analytic models
(E. van Kampen) dark matter, gas, galaxies
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What physical mechanism drives galaxy
evolution in dense environments?
Massive ellipticals live
in cluster cores
Spirals, typically live in the
outskirts of the supercluster
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1: Galaxy-cluster gravitational interations:
LSB galaxy Zoom in: Side on view Zoom in: Face on view
Galaxy Harassment movie: The evolution of a low surface
brightness galaxy as it falls into a cluster (Moore et al 1998)
Catherine Heymans LBL 22nd Jan 2008