Multiwavelength Modeling of the Luminous Fast Blue Optical Transient AT2024wpp

Omand, CMB ORCID: 0000-0002-9646-8710, Sarin, N, Lamb, GP ORCID: 0000-0001-5169-4143, Perley, DA ORCID: 0000-0001-8472-1996, Mummery, A, Hamidani, H, Schulze, S, Beasor, ER ORCID: 0000-0003-4666-4606, Bochenek, A ORCID: 0009-0008-2714-2507, Grabham, H-MS, Kennelly, SR, Khang, NM, Kobayashi, S ORCID: 0000-0001-7946-4200, Schroeder, G, Stone, WN, Turnbull, C and Wise, J ORCID: 0000-0003-0733-2916 (2026) Multiwavelength Modeling of the Luminous Fast Blue Optical Transient AT2024wpp. Monthly Notices of the Royal Astronomical Society, 550 (1). ISSN 0035-8711

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Abstract

Luminous fast blue optical transients (LFBOTs) are a growing class of enigmatic energetic transients. They show fast rises and declines, high temperatures throughout their evolution, and non-thermal emission in radio and X-rays. Their power source is currently unknown, but proposed models include engine-driven supernovae, interaction-powered supernovae, shock cooling emission, intermediate mass black hole tidal disruption events (IMBH TDEs), and Wolf-Rayet/black hole mergers, among others. AT2024wpp is the most optically luminous LFBOT to date and has been observed extensively at multiple wavelengths, including radio, optical, UV, and X-rays. We take models from multiple scenarios and fit them to the AT2024wpp optical, radio, and X-ray light curves to determine if which of these scenarios can best describe all aspects of the data. We show that none of the multiwavelength light curve models can reasonably explain the data, although other physical arguments favour a stellar mass/IMBH TDE of a low mass star and a synchrotron blast wave. We discuss how this scenario can be tested with late-time observations, and what other scenarios could possibly explain the broadband data.

Item Type:	Article
Uncontrolled Keywords:	astro-ph.HE; astro-ph.HE; transients: supernovae; transients: tidal disruption events; stars: black holes; astro-ph.HE; astro-ph.HE; 5109 Space Sciences; 5101 Astronomical Sciences; 51 Physical Sciences; 5101 Astronomical Sciences; 51 Physical Sciences; 0201 Astronomical and Space Sciences; Astronomy & Astrophysics; 5101 Astronomical sciences; 5107 Particle and high energy physics; 5109 Space sciences
Subjects:	Q Science > QB Astronomy Q Science > QC Physics
Divisions:	Astrophysics Research Institute
Publisher:	Oxford University Press
Date of acceptance:	3 June 2026
Date of first compliant Open Access:	15 September 2026
Date Deposited:	15 Sep 2026 14:07
Last Modified:	15 Sep 2026 14:07
DOI or ID number:	10.1093/mnras/stag1104
URI:	https://researchonline.ljmu.ac.uk/id/eprint/29434

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