Intermediate-luminosity red transients: Spectrophotometric properties and connection to electron-capture supernova explosions
| العنوان: | Intermediate-luminosity red transients: Spectrophotometric properties and connection to electron-capture supernova explosions |
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| المؤلفون: | K. W. Smith, G.-J. Wang, Paolo A. Mazzali, G. Valerin, Jesper Sollerman, Enrico Cappellaro, Morgan Fraser, B. Wang, Seppo Mattila, Stefano Valenti, Nancy Elias-Rosa, Erkki Kankare, Mariusz Gromadzki, Stephen J. Smartt, David Young, E. Callis, L. Tomasella, Y.-Z. Cai, Giacomo Cannizzaro, L. Borsato, Leonardo Tartaglia, Giacomo Terreran, P. Ochner, Francesca Onori, T. M. Reynolds, S. Benitez, S. Moran, M. T. Botticella, A. Reguitti, Rubina Kotak, X. W. Shu, Peter Lundqvist, A. Morales-Garoffolo, Andrea Pastorello, Sina Chen, X. Gao, Massimo Turatto, Cosimo Inserra, Xiaofeng Wang, Auni Somero, Ting-Wan Chen, F. Huang, A. Sagués Carracedo, Enrico Congiu, Avishay Gal-Yam, L.-Z. Wang, Z. Kostrzewa-Rutkowska, K. Itagaki, S. Benetti, Kate Maguire, Lluís Galbany, Giuliano Pignata, S. Holmbo, Avet Harutyunyan, S. J. Prentice, Chris Ashall, Maximilian Stritzinger, Mattias Ergon, S. Margheim |
| المصدر: | Astronomy and Astrophysics, 654 Digital.CSIC. Repositorio Institucional del CSIC instname Astronomy & Astrophysics, 654, 1-30 Astronomy & Astrophysics, 654, pp. 1-30 Cai, Y Z, Pastorello, A, Fraser, M, Botticella, M T, Elias-Rosa, N, Wang, L Z, Kotak, R, Benetti, S, Cappellaro, E, Turatto, M, Reguitti, A, Mattila, S, Smartt, S J, Ashall, C, Benitez, S, Chen, T W, Harutyunyan, A, Kankare, E, Lundqvist, P, Mazzali, P A, Morales-Garoffolo, A, Ochner, P, Pignata, G, Prentice, S J, Reynolds, T M, Shu, X W, Stritzinger, M D, Tartaglia, L, Terreran, G, Tomasella, L, Valenti, S, Valerin, G, Wang, G J, Wang, X F, Borsato, L, Callis, E, Cannizzaro, G, Chen, S, Congiu, E, Ergon, M, Galbany, L, Gal-Yam, A, Gao, X, Gromadzki, M, Holmbo, S, Huang, F, Inserra, C, Itagaki, K, Kostrzewa-Rutkowska, Z, Maguire, K, Margheim, S, Moran, S, Onori, F, Sagués Carracedo, A, Smith, K W, Sollerman, J, Somero, A, Wang, B & Young, D R 2021, ' Intermediate-luminosity red transients : Spectrophotometric properties and connection to electron-capture supernova explosions ', Astronomy and Astrophysics, vol. 654, A157 . https://doi.org/10.1051/0004-6361/202141078 |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | Brightness, Electron capture, Astronomy, Astrophysics::High Energy Astrophysical Phenomena, Supernovae: general, general [Supernovae], FOS: Physical sciences, Stas: AGB and post-AGB, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, AGB and post-AGB, Spectral line, Luminosity, Mass-Loss, 0103 physical sciences, Astrophysics::Solar and Stellar Astrophysics, Stars: mass-loss, General, 010303 astronomy & astrophysics, Solar and Stellar Astrophysics (astro-ph.SR), Astrophysics::Galaxy Astrophysics, Physics, High Energy Astrophysical Phenomena (astro-ph.HE), mass-loss [Stars], 010308 nuclear & particles physics, Astronomy and Astrophysics, AGB and post-AGB [Stars], Light curve, Stars, Supernova, Supernovae, Astrophysics - Solar and Stellar Astrophysics, 13. Climate action, Space and Planetary Science, Spectral energy distribution, AGB and post-AGB [Stas], Astrophysics - High Energy Astrophysical Phenomena, Radioactive decay |
| الوصف: | Cay, Y. Z., et al. We present the spectroscopic and photometric study of five intermediate-luminosity red transients (ILRTs), namely AT 2010dn, AT 2012jc, AT 2013la, AT 2013lb, and AT 2018aes. They share common observational properties and belong to a family of objects similar to the prototypical ILRT SN 2008S. These events have a rise time that is less than 15 days and absolute peak magnitudes of between-11.5 and-14.5 mag. Their pseudo-bolometric light curves peak in the range 0.5-9.0 × 1040 erg s-1 and their total radiated energies are on the order of (0.3-3) × 1047 erg. After maximum brightness, the light curves show a monotonic decline or a plateau, resembling those of faint supernovae IIL or IIP, respectively. At late phases, the light curves flatten, roughly following the slope of the 56Co decay. If the late-time power source is indeed radioactive decay, these transients produce 56Ni masses on the order of 10-4 to 10-3 M⊙. The spectral energy distribution of our ILRT sample, extending from the optical to the mid-infrared (MIR) domain, reveals a clear IR excess soon after explosion and non-negligible MIR emission at very late phases. The spectra show prominent H lines in emission with a typical velocity of a few hundred km s-1, along with Ca II features. In particular, the [Ca II] λ7291,7324 doublet is visible at all times, which is a characteristic feature for this family of transients. The identified progenitor of SN 2008S, which is luminous in archival Spitzer MIR images, suggests an intermediate-mass precursor star embedded in a dusty cocoon. We propose the explosion of a super-asymptotic giant branch star forming an electron-capture supernova as a plausible explanation for these events. |
| وصف الملف: | application/pdf |
| اللغة: | English |
| تدمد: | 1432-0746 |
| DOI: | 10.1051/0004-6361/202141078 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::21254cf19732c95fc793a24029731f0c http://arxiv.org/abs/2108.05087 |
| Rights: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....21254cf19732c95fc793a24029731f0c |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 14320746 |
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| DOI: | 10.1051/0004-6361/202141078 |