the bcg in abell 2261
Post on 23-Feb-2016
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The BCG in Abell 2261
Marc Postman & the CLASH teamSpecial Guest Star: Tod Lauer
3 arcsec (10.5 kpc) fiber Typical E-gal SED
NVSS Radio Emission Detected
BCG Model
38 arcsec = 133 kpc
For A2261: 1 arcsec subtends ~3.6 kpc (h=0.7) BCG Half-light radius = 28 kpc (h=0.7)
10 kpc 30 kpc
I(r) = Io((r/rb)-γ)(1 + (r/rb)-α)(γ-β)/α Cusp radius, rγ, is defined in Lauer et al. 2007:
Radius at which dln(I(r))/dlnr reaches a prescribed value, in this case -0.5.
rγ is more tightly correlated with other galaxy properties than rb
Lum
inos
ity D
ensit
yDe-projection: Abel integral
Need to get “knot” spectrum
Ann Zabludoff 2011
Ann Zabludoff 2011
Ann Zabludoff 2011
Ann Zabludoff 2011
Ann Zabludoff 2011
Ann Zabludoff 2011
Ann Zabludoff 2011
Ann Zabludoff 2011
Ann Zabludoff 2011
Ann Zabludoff 2011
Ann Zabludoff 2011
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