Image Details
Caption: Figure 11.
Evolution of the FWHM (top panel), velocity offset (middle panel; i.e., blueshift or redshift of line peak from the rest wavelength), and line EW (bottom panel) for the Hα (pink), He i λ5876 (gold), and He ii λ4686 (green) emission lines and associated blueshifted components of AT 2024wpp (outlined stars). AT 2024wpp exhibits unique spectral feature evolution compared to LFBOTs AT 2018cow (unoutlined stars) and CSS161010 (squares), as well as to TDEs AT 2020wey (upward-pointing triangles denote the spectral feature near the rest wavelength, and hexagons denote blueshifted components attributed to Hα by P. Charalampopoulos et al. 2023), AT 2018hyz (circles; P. Short et al. 2020), and AT 2022dbl (downward-pointing triangles; X. Guo et al. 2025, in preparation). Especially note the slight blueshift in time of the spectral features of AT 2024wpp.
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