Constraining Type Ia supernovae through their heights in edge-on galaxies
ABSTRACT In this Letter, using classified 197 supernovae (SNe) Ia, we perform an analysis of their height distributions from the disc in edge-on spirals and investigate their light-curve (LC) decline rates (Δm15). We demonstrate, for the first time, that 91T- and 91bg-like subclasses of SNe Ia are d...
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description | ABSTRACT
In this Letter, using classified 197 supernovae (SNe) Ia, we perform an analysis of their height distributions from the disc in edge-on spirals and investigate their light-curve (LC) decline rates (Δm15). We demonstrate, for the first time, that 91T- and 91bg-like subclasses of SNe Ia are distributed differently toward the plane of their host disc. The average height from the disc and its comparison with scales of thin/thick disc components gives a possibility to roughly estimate the SNe Ia progenitor ages: 91T-like events, being at the smallest heights, originate from relatively younger progenitors with ages of about several 100 Myr, 91bg-like SNe, having the highest distribution, arise from progenitors with significantly older ages ∼10 Gyr, and normal SNe Ia, which distributed between those of the two others, are from progenitors of about one up to ∼10 Gyr. We find a correlation between LC decline rates and SN Ia heights, which is explained by the vertical age gradient of the stellar population in discs and a sub-Chandrasekhar mass white dwarf explosion models, where the Δm15 parameter is a progenitor age indicator. |
doi_str_mv | 10.1093/mnrasl/slac163 |
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In this Letter, using classified 197 supernovae (SNe) Ia, we perform an analysis of their height distributions from the disc in edge-on spirals and investigate their light-curve (LC) decline rates (Δm15). We demonstrate, for the first time, that 91T- and 91bg-like subclasses of SNe Ia are distributed differently toward the plane of their host disc. The average height from the disc and its comparison with scales of thin/thick disc components gives a possibility to roughly estimate the SNe Ia progenitor ages: 91T-like events, being at the smallest heights, originate from relatively younger progenitors with ages of about several 100 Myr, 91bg-like SNe, having the highest distribution, arise from progenitors with significantly older ages ∼10 Gyr, and normal SNe Ia, which distributed between those of the two others, are from progenitors of about one up to ∼10 Gyr. We find a correlation between LC decline rates and SN Ia heights, which is explained by the vertical age gradient of the stellar population in discs and a sub-Chandrasekhar mass white dwarf explosion models, where the Δm15 parameter is a progenitor age indicator.</description><identifier>ISSN: 1745-3925</identifier><identifier>EISSN: 1745-3933</identifier><identifier>DOI: 10.1093/mnrasl/slac163</identifier><language>eng</language><publisher>Oxford University Press</publisher><ispartof>Monthly notices of the Royal Astronomical Society. Letters, 2023-03, Vol.520 (1), p.L21-L27</ispartof><rights>2022 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society 2023</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c203t-97c6e7ea78c7705f4356069ef81ad87c538a43444d49d88f27e1ec703161ed1e3</citedby><cites>FETCH-LOGICAL-c203t-97c6e7ea78c7705f4356069ef81ad87c538a43444d49d88f27e1ec703161ed1e3</cites><orcidid>0000-0003-0791-1512</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,1604,27923,27924</link.rule.ids><linktorsrc>$$Uhttps://dx.doi.org/10.1093/mnrasl/slac163$$EView_record_in_Oxford_University_Press$$FView_record_in_$$GOxford_University_Press</linktorsrc></links><search><creatorcontrib>Barkhudaryan, Lilit V</creatorcontrib><title>Constraining Type Ia supernovae through their heights in edge-on galaxies</title><title>Monthly notices of the Royal Astronomical Society. Letters</title><description>ABSTRACT
In this Letter, using classified 197 supernovae (SNe) Ia, we perform an analysis of their height distributions from the disc in edge-on spirals and investigate their light-curve (LC) decline rates (Δm15). We demonstrate, for the first time, that 91T- and 91bg-like subclasses of SNe Ia are distributed differently toward the plane of their host disc. The average height from the disc and its comparison with scales of thin/thick disc components gives a possibility to roughly estimate the SNe Ia progenitor ages: 91T-like events, being at the smallest heights, originate from relatively younger progenitors with ages of about several 100 Myr, 91bg-like SNe, having the highest distribution, arise from progenitors with significantly older ages ∼10 Gyr, and normal SNe Ia, which distributed between those of the two others, are from progenitors of about one up to ∼10 Gyr. We find a correlation between LC decline rates and SN Ia heights, which is explained by the vertical age gradient of the stellar population in discs and a sub-Chandrasekhar mass white dwarf explosion models, where the Δm15 parameter is a progenitor age indicator.</description><issn>1745-3925</issn><issn>1745-3933</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2023</creationdate><recordtype>article</recordtype><recordid>eNqFkDFPwzAUhC0EEqWwMntlSGvHTuyMKAIaqRJLmaMn5yUxSu3IThD99xSlYmW5u-Huho-QR842nBVie3QB4rCNAxieiyuy4kpmiSiEuP7LaXZL7mL8ZEworfSKVKV3cQpgnXUdPZxGpBXQOI8YnP8CpFMf_Nz1Z0cb6Fm6forUOopNh4l3tIMBvi3Ge3LTwhDx4eJr8vH6cih3yf79rSqf94lJmZiSQpkcFYLSRimWtVJkOcsLbDWHRiuTCQ1SSCkbWTRat6lCjkYxwXOODUexJpvl1wQfY8C2HoM9QjjVnNW_IOoFRH0BcR48LQM_j_91fwASAWKQ</recordid><startdate>20230301</startdate><enddate>20230301</enddate><creator>Barkhudaryan, Lilit V</creator><general>Oxford University Press</general><scope>AAYXX</scope><scope>CITATION</scope><orcidid>https://orcid.org/0000-0003-0791-1512</orcidid></search><sort><creationdate>20230301</creationdate><title>Constraining Type Ia supernovae through their heights in edge-on galaxies</title><author>Barkhudaryan, Lilit V</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c203t-97c6e7ea78c7705f4356069ef81ad87c538a43444d49d88f27e1ec703161ed1e3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2023</creationdate><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Barkhudaryan, Lilit V</creatorcontrib><collection>CrossRef</collection><jtitle>Monthly notices of the Royal Astronomical Society. Letters</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Barkhudaryan, Lilit V</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Constraining Type Ia supernovae through their heights in edge-on galaxies</atitle><jtitle>Monthly notices of the Royal Astronomical Society. Letters</jtitle><date>2023-03-01</date><risdate>2023</risdate><volume>520</volume><issue>1</issue><spage>L21</spage><epage>L27</epage><pages>L21-L27</pages><issn>1745-3925</issn><eissn>1745-3933</eissn><abstract>ABSTRACT
In this Letter, using classified 197 supernovae (SNe) Ia, we perform an analysis of their height distributions from the disc in edge-on spirals and investigate their light-curve (LC) decline rates (Δm15). We demonstrate, for the first time, that 91T- and 91bg-like subclasses of SNe Ia are distributed differently toward the plane of their host disc. The average height from the disc and its comparison with scales of thin/thick disc components gives a possibility to roughly estimate the SNe Ia progenitor ages: 91T-like events, being at the smallest heights, originate from relatively younger progenitors with ages of about several 100 Myr, 91bg-like SNe, having the highest distribution, arise from progenitors with significantly older ages ∼10 Gyr, and normal SNe Ia, which distributed between those of the two others, are from progenitors of about one up to ∼10 Gyr. We find a correlation between LC decline rates and SN Ia heights, which is explained by the vertical age gradient of the stellar population in discs and a sub-Chandrasekhar mass white dwarf explosion models, where the Δm15 parameter is a progenitor age indicator.</abstract><pub>Oxford University Press</pub><doi>10.1093/mnrasl/slac163</doi><orcidid>https://orcid.org/0000-0003-0791-1512</orcidid></addata></record> |
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title | Constraining Type Ia supernovae through their heights in edge-on galaxies |
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