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JWST Observations of the Double Nucleus in NGC 4486B: Possible Evidence for a Recent Binary SMBH Merger and Recoil

  • Authors: Behzad Tahmasebzadeh, Monica Valluri, Shashank Dattathri, Tatsuya Akiba, Fazeel Mahmood Khan, Matthew A. Taylor, Haruka Yoshino, Solveig Thompson, Ann-Marie Madigan, Frank C. van den Bosch, Kelly Holley-Bockelmann, Patrick Côté, Laura Ferrarese, Michael J. Drinkwater, Holger Baumgardt, Misty C. Bentz, Kristen Dage, Eric W. Peng, Somya Jha, Andrea V. Macciò, Chengze Liu, Tyrone E. Woods

Behzad Tahmasebzadeh et al 2026 The Astrophysical Journal Letters 1001 .

  • Provider: AAS Journals

Caption: Figure 5.

Trajectories of the BH that is kicked from the center of NGC 4486B. The different-colored curves represent kicks in different directions. The top panels show the BH’s relative distance from the galaxy center, and the bottom panels show its relative speed. The left and right panels correspond to kick velocities of Vkick = 0.2 Vesc, 0.5 Vesc, and 0.75 Vesc, respectively. The black dashed and dotted lines show the expected amplitude of Brownian motion and the observed offset in position and vlos, respectively. In all cases, the BH quickly returns close to the galaxy center, with position and velocity offsets that are well below the observed values.

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