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To accomplish this, we present a simple visual classification approach based on the UV\/H\u2009\u03b1 images of the discs of host galaxies. We demonstrate that, from the perspective of the dynamical time-scale of the SFD, where the star formation is suppressed by the bar evolution, the \u0394m15 of SN Ia and progenitor age can be related. The SFD phenomenon gives an excellent possibility to separate a subpopulation of SN\u00a0Ia progenitors with ages older than a few Gyr. We show, for the first time, that the SFDs contain mostly faster declining SNe\u00a0Ia (\u0394m15 &amp;gt; 1.25). For the galaxies without SFDs, the region within the bar radius, and outer disc contain mostly slower declining SNe\u00a0Ia. To better constrain the delay times of SNe\u00a0Ia, we encourage new studies (e.g. integral field observations) using the SFD phenomenon on larger and more robust datasets of SNe\u00a0Ia and their host galaxies.<\/jats:p>","DOI":"10.1093\/mnrasl\/slab048","type":"journal-article","created":{"date-parts":[[2021,5,7]],"date-time":"2021-05-07T20:52:50Z","timestamp":1620420770000},"page":"L52-L57","source":"Crossref","is-referenced-by-count":5,"title":["Type Ia supernovae in the star formation deserts of spiral host galaxies"],"prefix":"10.1093","volume":"505","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-7392-1765","authenticated-orcid":false,"given":"A A","family":"Hakobyan","sequence":"first","affiliation":[{"name":"Center for Cosmology and Astrophysics , Alikhanian National Science Laboratory, 2 Alikhanian Brothers Str, 0036 Yerevan, Armenia"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8250-4912","authenticated-orcid":false,"given":"A G","family":"Karapetyan","sequence":"additional","affiliation":[{"name":"Center for Cosmology and Astrophysics , Alikhanian National Science Laboratory, 2 Alikhanian Brothers Str, 0036 Yerevan, Armenia"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0791-1512","authenticated-orcid":false,"given":"L V","family":"Barkhudaryan","sequence":"additional","affiliation":[{"name":"Center for Cosmology and Astrophysics , Alikhanian National Science Laboratory, 2 Alikhanian Brothers Str, 0036 Yerevan, Armenia"}]},{"given":"M H","family":"Gevorgyan","sequence":"additional","affiliation":[{"name":"Center for Cosmology and Astrophysics , Alikhanian National Science Laboratory, 2 Alikhanian Brothers Str, 0036 Yerevan, Armenia"}]},{"given":"V","family":"Adibekyan","sequence":"additional","affiliation":[{"name":"Instituto de Astrof\u00edsica e Ci\u00eancias do Espa\u00e7o, Universidade do Porto, CAUP, Rua das Estrelas , P-4150-762 Porto, Portugal"},{"name":"Departamento de F\u00edsica e Astronomia, Faculdade de Ci\u00eancias, Universidade do Porto , Rua do Campo Alegre, P-4169-007 Porto, Portugal"}]}],"member":"286","published-online":{"date-parts":[[2021,5,10]]},"reference":[{"key":"2023122006281470900_bib1","doi-asserted-by":"publisher","first-page":"732","DOI":"10.1093\/mnras\/stu2712","volume":"448","author":"Anderson","year":"2015","journal-title":"MNRAS"},{"key":"2023122006281470900_bib2","doi-asserted-by":"publisher","first-page":"3130","DOI":"10.1093\/mnras\/stw873","volume":"459","author":"Aramyan","year":"2016","journal-title":"MNRAS"},{"key":"2023122006281470900_bib3","doi-asserted-by":"publisher","first-page":"718","DOI":"10.1093\/mnras\/stz2585","volume":"490","author":"Barkhudaryan","year":"2019","journal-title":"MNRAS"},{"key":"2023122006281470900_bib4","doi-asserted-by":"publisher","first-page":"157","DOI":"10.1093\/mnras\/stw2492","volume":"470","author":"Blondin","year":"2017","journal-title":"MNRAS"},{"key":"2023122006281470900_bib5","doi-asserted-by":"publisher","first-page":"3470","DOI":"10.1093\/mnras\/stw115","volume":"457","author":"Campbell","year":"2016","journal-title":"MNRAS"},{"key":"2023122006281470900_bib6","doi-asserted-by":"publisher","first-page":"1898","DOI":"10.1093\/mnras\/stu1892","volume":"445","author":"Childress","year":"2014","journal-title":"MNRAS"},{"key":"2023122006281470900_bib7","doi-asserted-by":"publisher","first-page":"0135","DOI":"10.1038\/s41550-017-0135","volume":"1","author":"Crocker","year":"2017","journal-title":"Nat. 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