https://m2.mtmt.hu/ eng 2026-05-30 22:00 JournalArticle 35207604 VALIDATED true 0 false 2026-05-24T03:25:43.652+0000 2025-03-24T11:59:15.901+0000 2024-09-05T09:26:39.702+0000 true 10066055 Turtóczki Tímea /api/admin/10066055 Admin false 2025-03-24T11:59:06.942+0000 2025-03-24T11:59:06.942+0000 2025-03-24T11:59:16.082+0000 true 10083379 Belházyné Szombathelyi Ágnes /api/admin/10083379 Admin true Admin 10014568 /api/admin/10014568 Vándor Andrea true 10014568 true 2025-05-12T09:26:26.132+0000 true false true 24 24 /api/publicationtype/24 PublicationType 1 true 24 JournalArticle true 10000059 Article true 24 24 /api/publicationtype/24 PublicationType 1 true 24 JournalArticle /api/subtype/10000059 Szakcikk SubType 101 true 10000059 true 1 /api/category/1 Category true 1 Szalai, T. The story of SN 2021aatd: A peculiar 1987A-like supernova with an early-phase luminosity excess true true /api/journal/552 REVIEWED true false 552 false 552 true 0004-6361 1432-0746 Journal FOREIGN 690 A17 A17 22 2024 There is a growing number of peculiar events that cannot be assigned to any of the main supernova (SN) classes. SN 1987A and a handful of similar objects, thought to be explosive outcomes of blue supergiant stars, belong to them: while their spectra closely resemble those of H-rich (IIP) SNe, their light-curve (LC) evolution is very different. Here we present the detailed photometric and spectroscopic analysis of SN 2021aatd, a peculiar Type II explosion: while its early-time evolution resembles that of the slowly evolving, double-peaked SN 2020faa (however, at a lower luminosity scale), after $\\sim$40 days, its LC shape becomes similar to that of SN 1987A-like explosions. Beyond comparing LCs, color curves, and spectra of SN 2021aatd to that of SNe 2020faa, 1987A, and of other objects, we compare the observed spectra with our own SYN++ models and with the outputs of published radiative transfer models. We also modeled the pseudo-bolometric LCs of SNe 2021aatd and 1987A assuming a two-component (core+shell) ejecta, and involving the rotational energy of a newborn magnetar in addition to radioactive decay. We find that both the photometric and spectroscopic evolution of SN 2021aatd can be well described with the explosion of a $\\sim$15 $M_\\odot$ blue supergiant star. Nevertheless, SN 2021aatd shows higher temperatures and weaker Na ID and Ba II 6142 A lines than SN 1987A, which is reminiscent of rather to IIP-like atmospheres. With the applied two-component ejecta model (counting with both decay and magnetar energy), we can successfully describe the bolometric LC of SN 2021aatd, including the first $\\sim$40-day long phase showing an excess compared to 87A-like SNe but being strikingly similar to that of the long-lived SN 2020faa. Nevertheless, finding a unified model that also explains the LCs of more luminous events (like SN 2020faa) is still a matter of concern. 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(SZTE / BO); Konkoly Thege Miklós Csillagászati Intézet (HRN CSFK); Kísérleti Fizikai Tanszék (SZTE / TTIK / FI); MTA-ELTE Lendület Tejútrendszer Kutatócsoport (ELTE / Gothard); Szegedi Tudományegyetem Bajai Obszervatóriuma (SZTE) 9 29 6 23 0 true 10014568 Language 10002 /api/language/10002 Angol English true 2 true PersonAuthorship 118938690 /api/authorship/118938690 1 0.043 true false true Author 10035471 /api/author/10035471 Szalai Tamás true 10035471 true Szalai T. true false false AuthorshipType 1 /api/authorshiptype/1 0 true 0 true false true PersonAuthorship 118938691 /api/authorship/118938691 2 0.043 false false false Author 10076536 /api/author/10076536 Könyves-Tóth Réka true true Könyves-Tóth R. true false false AuthorshipType 1 /api/authorshiptype/1 0 true 0 true false true PersonAuthorship 118938692 /api/authorship/118938692 3 0.043 false false false Author 10054959 /api/author/10054959 Nagy Andrea true 10054959 true Nagy A. 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(<span class="authorship-author-name">Könyves-Tóth Réka</span> <span class="authorAux-mtmt"> csillagászat</span>) </a> </span> <span class="author-affil"><span title="HUN-REN Research Centre for Astronomy and Earth Sciences">HUN-REN CSFK</span>/Konkoly Observatory</span> ;&nbsp;&nbsp;&nbsp; <span class="author-name" mtid="10054959"><a href="/gui2/?type=authors&mode=browse&sel=10054959" target="_blank">Nagy A. P. (<span class="authorship-author-name">Nagy Andrea</span> <span class="authorAux-mtmt"> Asztrofizika</span>) </a> </span> <span class="author-affil"><span title="University of Szeged">SZTE</span>/<span title="Faculty of Science and Informatics">TTIK</span>/<span title="Fizikai Intézet">FI</span>/Department of Experimental Physics; <span title="University of Szeged">SZTE</span>/<span title="Baja Astronomical Observatory of Szeged University">BO</span>/HUN-REN-SZTE Stellar Astrophysics Research Group</span> ;&nbsp;&nbsp;&nbsp; <span class="author-name" >Hiramatsu D. </span> ;&nbsp;&nbsp;&nbsp; <span class="author-name" >Arcavi I. </span> ;&nbsp;&nbsp;&nbsp; <span class="author-name" >Bostroem A. </span> ;&nbsp;&nbsp;&nbsp; <span class="author-name" >Howell D. A. </span> ;&nbsp;&nbsp;&nbsp; <span class="author-name" >Farah J. </span> ;&nbsp;&nbsp;&nbsp; <span class="author-name" >McCully C. </span> ;&nbsp;&nbsp;&nbsp; <span class="author-name" >Newsome M. </span> ;&nbsp;&nbsp;&nbsp; <span class="author-name" >Padilla Gonzalez E. </span> ;&nbsp;&nbsp;&nbsp; <span class="author-name" >Pellegrino C. </span> ;&nbsp;&nbsp;&nbsp; <span class="author-name" >Terreran G. </span> ;&nbsp;&nbsp;&nbsp; <span class="author-name" >Berger E. </span> ;&nbsp;&nbsp;&nbsp; <span class="author-name" >Blanchard P. </span> ;&nbsp;&nbsp;&nbsp; <span class="author-name" >Gomez S. </span> ;&nbsp;&nbsp;&nbsp; <span class="author-name" mtid="10029436"><a href="/gui2/?type=authors&mode=browse&sel=10029436" target="_blank">Székely P. (<span class="authorship-author-name">Székely Péter</span> <span class="authorAux-mtmt"> csillagászat</span>) </a> </span> <span class="author-affil"><span title="University of Szeged">SZTE</span>/<span title="Baja Astronomical Observatory of Szeged University">BO</span>/HUN-REN-SZTE Stellar Astrophysics Research Group; <span title="University of Szeged">SZTE</span>/<span title="Faculty of Science and Informatics">TTIK</span>/<span title="Fizikai Intézet">FI</span>/Department of Experimental Physics</span> ;&nbsp;&nbsp;&nbsp; <span class="author-name" mtid="10099617"><a href="/gui2/?type=authors&mode=browse&sel=10099617" target="_blank">Bánhidi D. (<span class="authorship-author-name">Bánhidi Dominik</span> <span class="authorAux-mtmt"> asztrofizika</span>) </a> </span> <span class="author-affil"><span title="University of Szeged">SZTE</span>/Baja Astronomical Observatory of Szeged University</span> ;&nbsp;&nbsp;&nbsp; <span class="author-name" mtid="10026009"><a href="/gui2/?type=authors&mode=browse&sel=10026009" target="_blank">Bíró I. B. (<span class="authorship-author-name">Bíró Imre Barna</span> <span class="authorAux-mtmt"> Csillagászat</span>) </a> </span> <span class="author-affil"><span title="University of Szeged">SZTE</span>/<span title="Baja Astronomical Observatory of Szeged University">BO</span>/HUN-REN-SZTE Stellar Astrophysics Research Group; <span title="University of Szeged">SZTE</span>/Baja Astronomical Observatory of Szeged University</span> ;&nbsp;&nbsp;&nbsp; <span class="author-name" mtid="10080053"><a href="/gui2/?type=authors&mode=browse&sel=10080053" target="_blank">Csányi I. (<span class="authorship-author-name">Csányi István</span> <span class="authorAux-mtmt"> csillagász</span>) </a> </span> <span class="author-affil"><span title="University of Szeged">SZTE</span>/Baja Astronomical Observatory of Szeged University</span> ;&nbsp;&nbsp;&nbsp; <span class="author-name" mtid="10017739"><a href="/gui2/?type=authors&mode=browse&sel=10017739" target="_blank">Pál A. (<span class="authorship-author-name">Pál András</span> <span class="authorAux-mtmt"> Asztrofizika</span>) </a> </span> <span class="author-affil"><span title="HUN-REN Research Centre for Astronomy and Earth Sciences">HUN-REN CSFK</span>/Konkoly Observatory</span> ;&nbsp;&nbsp;&nbsp; <span class="author-name" >Rho J. </span> ;&nbsp;&nbsp;&nbsp; <span class="author-name" mtid="10001530"><a href="/gui2/?type=authors&mode=browse&sel=10001530" target="_blank">Vinkó J. (<span class="authorship-author-name">Vinkó József</span> <span class="authorAux-mtmt"> Csillagászat asztrofizika</span>) </a> </span> <span class="author-affil"><span title="HUN-REN Research Centre for Astronomy and Earth Sciences">HUN-REN CSFK</span>/Konkoly Observatory; <span title="Eötvös Loránd University">ELTE</span>/<span title="Faculty of Science">ELU FoS</span>/Institute of Physics and Astronomy; <span title="University of Szeged">SZTE</span>/<span title="Faculty of Science and Informatics">TTIK</span>/<span title="Fizikai Intézet">FI</span>/Department of Experimental Physics</span> </div> </div> <div class="title"><a href="/gui2/?mode=browse&params=publication;35207604" target="_blank">The story of SN 2021aatd: A peculiar 1987A-like supernova with an early-phase luminosity excess</a></div> <div> <span class="journal-title">ASTRONOMY & ASTROPHYSICS</span> <span class="journal-issn">(<a target="_blank" href="https://portal.issn.org/resource/ISSN/0004-6361">0004-6361</a> <a target="_blank" href="https://portal.issn.org/resource/ISSN/1432-0746">1432-0746</a>)</span>: <span class="journal-volume">690</span> <span class="page"> Paper A17. 22 p. </span> <span class="year">(2024)</span> </div> <div class="pub-footer"> <span class="language" xmlns="http://www.w3.org/1999/html">Language: English | </span> <span class="identifiers"> <span class="id identifier oa_GOLD" title=" Gold "> <a style="color:blue" title="10.1051/0004-6361/202348548" target="_blank" href="https://doi.org/10.1051/0004-6361/202348548"> DOI </a> </span> <span class="id identifier oa_none" title="none"> <a style="color:blue" title="001322370900010" target="_blank" href="https://www.webofscience.com/wos/woscc/full-record/001322370900010"> WoS </a> </span> <span class="id identifier oa_none" title="none"> <a style="color:blue" title="85205462474" target="_blank" href="http://www.scopus.com/record/display.url?origin=inward&eid=2-s2.0-85205462474"> Scopus </a> </span> <span class="id identifier oa_none" title="none"> <a style="color:blue" title="2024A&A...690A..17S" target="_blank" href="http://ui.adsabs.harvard.edu/abs/2024A&A...690A..17S"> ADS </a> </span> <span class="id identifier oa_GREEN" title=" Green "> <a style="color:blue" title="2406.02498" target="_blank" href="http://arxiv.org/abs/2406.02498"> arXiv </a> </span> <span class="id identifier oa_GREEN" title=" Green "> <a style="color:blue" title="39078" target="_blank" href="http://publicatio.bibl.u-szeged.hu/39078"> SZTE Publicatio </a> </span> </span> <OnlyViewableByAuthor><div class="ratings"> <div class="journal-subject">Journal subject: Scopus - Astronomy and Astrophysics&nbsp;&nbsp;&nbsp;Rank:&nbsp;Q1</div> <div class="journal-subject">Journal subject: Scopus - Space and Planetary Science&nbsp;&nbsp;&nbsp;Rank:&nbsp;Q1</div> </div></OnlyViewableByAuthor> <div class="publication-citation" style="margin-left: 0.5cm;"> <span title="" class="citingPub-count">Citing papers: 1</span> | Independent citation: 1 | Self citation: 0 | Unknown citation: 0 | Number of citations in WoS: 1 | WoS/Scopus assigned:&nbsp;1 | Number of citations with DOI:&nbsp;1 </div> <div class="publication-citation"> <a target="_blank" href="/api/publication?cond=citations.related;eq;35207604&sort=publishedYear,desc&sort=title"> Number of cited publications: 5 </a> </div> <div class="mtid"><span class="long-pub-mtid">Publication: 35207604</span> | <span class="status-data status-VALIDATED"> Validated </span> Core Citing | <span class="type-subtype">Journal Article ( Article ) </span> | <span class="pub-category">Scientific</span> | <span class="publication-sourceOfData">RIS-ADS</span> </div> <div class="funder"> (2.3.2.15-2016-00033) Funder: GINOP, Szupernóvák és környezetük(FK-134432) Funder: NRDI Office, Rejtélyes Csillagrobbanások Numerikus Modellezése(PD-134434) Funder: NRDI Office, Megoldatlan rejtélyek a szupernóvák asztrofizikájában(K-142534) Funder: NRDI Office, János Bolyai Research Scholarship of the Hungarian Academy of Sciences, (ÚNKP-22-5) Funder: Ministry of Culture and Innovation, ÚNKP(Új Nemzeti Kiválóság Program 22-4) Funder: NR-DIO </div> <div class="lastModified">Last Modified: 2025.03.24. 12:59 Ágnes Belházyné Szombathelyi (SZTE admin5) </div> <div class="lockedBy">Centrally managed 2025.05.12. 11:26 Andrea Vándor (VA, admin) </div> </div></div>