text:   well described by the Navarro-Frenk-White profile",7,"['Our new paper is on arXiv today: <LINK>.\n\nBy analyzing 23 elliptical lens galaxies from SLACS, we find that the dark matter distribution is close to the NFW profile on average at z~0.2 without any contraction/expansion.\n\nA summary with some figures in the thread.', 'We perform state-of-the-art lens modeling for these 23 lens galaxies. This figure shows 5 of them. https://t.co/tP9NrGyH5S', 'We combine the strong lensing constraints with the stellar kinematics and weak lensing measurements to individually constrain the stellar and dark matter distributions. Our model allows for adiabatic contraction in the dark matter and a M/L gradient in the stellar distribution. https://t.co/XhE2OHahsz', 'We find that the NFW+stars profile deviate upwards by ~5% on average from the power-law model near the Einstein radius. https://t.co/IAILEn1rL4', 'On average, there is no significant contraction/expansion in the dark matter halos with M_200 ~ 10^13.1 M_sun at z~0.2. Furthermore, almost no gradient in the stellar M/L is favored around the effective or half-light radius. https://t.co/kk96jRfzxy', 'Comparing our inferred stellar masses with those from SPS-based measurements supports a heavy IMF like the Salpeter IMF in these elliptical galaxies. https://t.co/IglQXCUWcD', 'All of our results are consistent with a scenario where halos of  massive elliptical galaxies first contract up to z~2 due to baryonic cooling, but then the halos primarily grow through dissipationless mergers while AGN feedback counteracts the initial contraction.']",20,08,1434