NGC 5128, J.L. Sersic, Atlas de Galaxias Australes, 1968
NGC 253, J.L. Sersic, Atlas de Galaxias Australes, 1968
1st Extragalactic Astronomy Meeting, 1975, J.L. Sersic, T.G. Catellanos, P. Kaufman
NGC 2442, J.L. Sersic, Atlas de Galaxias Australes, 1968
2nd Extragalactic Astronomy Meeting, 1987
NGC 2997, J.L. Sersic, Atlas de Galaxias Australes, 1968
3rd Extragalactic Astronomy Meeting, 1996
NGC 55, J.L. Sersic, Atlas de Galaxias Australes, 1968

Laerte Sodre

Brasil – Universidade de São Paulo

A photometric estimator of galaxy cluster masses

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Abstract: We model the cumulative galaxy number profile of SDSS clusters of galaxies with a Sérsic profile plus a two-halo term, using photometric redshifts to ascribe cluster membership. The fitted parameters allow us to obtain the splashback radii of the clusters. Using masses obtained by weak lensing for calibration, we show that we are able to estimate cluster masses from the splashback radii with a dispersion of 0.12 dex. The results are robust with
respect to the magnitude limit adopted for the analysis and show that we are able to estimate cluster masses with good accuracy by using photometric information only.

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