Extended Data Figure 2: KLIP and ADI Hα SNR maps. | Nature

Extended Data Figure 2: KLIP and ADI Hα SNR maps.

From: Accreting protoplanets in the LkCa 15 transition disk

Extended Data Figure 2

a–c, Final KLIP SNR maps for Hα (a), continuum (b) and the difference between the two (ASDI, c). d–f, Final cADI SNR maps in the same order. Dividing by the radial noise profiles to create these maps should normalize the noise distribution at all radii within the speckle-dominated regime. The presence of dark holes in the maps suggests that we are speckle-dominated out to the AO control radius at r ≈ 20 pixels (white, dashed circles). LkCa 15 b’s separation is 11.6 pixels. The yellow keystones indicate the 2σ range of allowed astrometry for the KLIP ASDI point source (upper right) based on negative simulated planet injection.

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