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A Kiloparsec-scale Stellar Cavity in the Center of A402-BCG May Be Caused by Dynamic Interactions with an Ultramassive Black Hole

  • Authors: Michael McDonald, Gourav Khullar, David Lagattuta, Guillaume Mahler, Shashank Dattathri, Jose M. Diego, Alastair C. Edge, Benjamin Floyd, Michael D. Gladders, Scott A. Hughes, Mathilde Jauzac, Nader Khonji, Gavin Leroy, Richard Massey, Mireia Montes, Priyamvada Natarajan, Michael Reefe, Keren Sharon, Frank van den Bosch, Stepane Werner, Adi Zitrin

Michael McDonald et al 2026 The Astrophysical Journal Letters 1002 .

  • Provider: AAS Journals

Caption: Figure A2.

This figure shows the integrated model photometry for the central galaxy and the stellar cavity in A402. For clarity, the flux values for the stellar cavity have been scaled by a multiplicative factor of -50 to make them positive and similar in intensity to the galaxy. The best-fit models from CIGALE (M. Boquien et al. 2019; G. Yang et al. 2022) are shown in gray, and the relevant properties of these stellar populations are included. This figure demonstrates that the stellar cavity has an SED consistent with missing stars, and that the implied stellar mass that is missing is ∼2 × 109 M⊙.

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