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The Transitional Type Ibn/IIn SN 2022pda, with Pre-explosion Outbursts and a Double-peaked Light Curve

  • Authors: Y.-Z. Cai, 永志 蔡, A. Pastorello, R. Chiba, T. J. Moriya, A. Reguitti, L. Tartaglia, S. Moran, S. Campana, Z.-Y. Wang, J.-W. Zhao, J. P. Anderson, S. Benetti, S. J. Brennan, E. Cappellaro, K. C. Chambers, T.-W. Chen, Z.-H. Chen, T. de Boer, Y.-Z. Dong, J. Duarte, N. Elias-Rosa, M. Fraser, W.-P. Gan, H. Gao, M. Gromadzki, G. Hosseinzadeh, D. A. Howell, C. Inserra, T. Kangas, E. Kankare, T. Kravtsov, L.-P. Li, C.-C. Lin, T. B. Lowe, P. Lundqvist, E. A. Magnier, K. Matilainen, P. A. Mazzali, C. McCully, P. Minguez, T. E. Müller-Bravo, M. Newsome, E. Padilla Gonzalez, C. Pellegrino, P. J. Pessi, T. Petrushevska, G. Pignata, R. P. Santos, S. Schulze, S. J. Smartt, I. A. Smith, K. W. Smith, J. Sollerman, S. Srivastav, M. D. Stritzinger, G. Terreran, G. Valerin, R. Wainscoat, S.-Q. Wang, 善钦 王, D. R. Young, L. Galbany, Z. Li, I. Salmaso, S. Zha, 帅 查, J.-M. Bai, 金明 白, B. Wang, 博 王, X.-F. Wang, 晓锋 王, J.-J. Zhang, 居甲 张

Y.-Z. Cai et al 2026 The Astrophysical Journal Letters 1004 .

  • Provider: AAS Journals

Caption: Figure 4.

Left panel: comparison of SN 2022pda spectra with those of reference objects at similar phases: before the light-curve peak (blue), around maximum (green), and at late times (purple). The most relevant lines (Hα , Hβ , and the main He I  lines) are marked with vertical lines. The ‘⊕’ symbols mark the principal telluric absorption. Right panel: close up of the regions of Hα  and Hβ  of SN 2022pda spectra in velocity space. Hα , Hβ , and He I  lines are highlighted by vertical lines.

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