Figure 28 from The Next Generation Virgo Cluster Survey (NGVS). I. Introduction to the Survey

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The Next Generation Virgo Cluster Survey (NGVS). I. Introduction to the Survey

Authors: Laura Ferrarese, Patrick Côté, Jean-Charles Cuillandre, S. D. J. Gwyn, Eric W. Peng, Lauren A. MacArthur, Pierre-Alain Duc, A. Boselli, Simona Mei, Thomas Erben, Alan W. McConnachie, Patrick R. Durrell, J. Christopher Mihos, Andrés Jordán, Ariane Lançon, Thomas H. Puzia, Eric Emsellem, Michael L. Balogh, John P. Blakeslee, Ludovic van Waerbeke, Raphaël Gavazzi, Bernd Vollmer, J. J. Kavelaars, David Woods, Nicholas M. Ball, S. Boissier, Stéphane Courteau, E. Ferriere, G. Gavazzi, Hendrik Hildebrandt, P. Hudelot, M. Huertas-Company, Chengze Liu, Dean McLaughlin, Y. Mellier, Martha Milkeraitis, David Schade, Chantal Balkowski, Frédéric Bournaud, R. G. Carlberg, S. C. Chapman, Henk Hoekstra, Chien Peng, Marcin Sawicki, Luc Simard, James E. Taylor, R. Brent Tully, Wim van Driel, Christine D. Wilson, Todd Burdullis, Billy Mahoney, and Nadine Manset

Ferrarese et al. 2012 The Astrophysical Journal Supplement Series 200 4.

Provider: AAS Journals

Caption: Figure 28.

Example of a strong-lensing event detected in the NGVS. Clockwise from the upper left corner, the panels show the (a) original image with the foreground deflector subtracted; (b) image plane model; (c) residual image; and (d) source plane model for the reconstructed source. This analysis gives a best-fit Einstein radius of ≈1 farcs 51. The photometric redshift of the deflector is z ~ 0.6, which, for an assumed redshift of z ~ 1.5 ± 0.5 for the background source, implies a deflector velocity dispersion of σ ~ 320 ± 30 km s ⁻¹. The NGVS is expected to uncover ~200 such strong-lensing events.

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