Multiwavelength Observations of Multiple Eruptions of the Recurrent Nova M31N 2008-12a
We report the optical, UV, and soft X-ray observations of the 2017–2022 eruptions of the recurrent nova M31N 2008-12a. We find a cusp feature in the r′ - and i′ -band light curves close to the peak, which could be related to jets. The geometry of the nova ejecta based on morpho-kinematic modeling of...
| Main Authors: | , , , , , , , , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
American Astronomical Society
2024
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| _version_ | 1811140046760181760 |
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| author | Basu, J Pavana, M Anupama, GC Barway, S Singh, KP Swain, V Srivastav, S Kumar, H Bhalerao, V Sonith, LS Selvakumar, G |
| author_facet | Basu, J Pavana, M Anupama, GC Barway, S Singh, KP Swain, V Srivastav, S Kumar, H Bhalerao, V Sonith, LS Selvakumar, G |
| author_sort | Basu, J |
| collection | OXFORD |
| description | We report the optical, UV, and soft X-ray observations of the 2017–2022 eruptions of the recurrent nova M31N 2008-12a. We find a cusp feature in the r′ - and i′ -band light curves close to the peak, which could be related to jets. The geometry of the nova ejecta based on morpho-kinematic modeling of the Hα emission line indicates an extended jet-like bipolar structure. Spectral modeling indicates an ejecta mass of 10−7–10−8 M ⊙ during each eruption and an enhanced helium abundance. The supersoft source phase shows significant variability, which is anticorrelated to the UV emission, indicating a common origin. The variability could be due to the reformation of the accretion disk. We infer a steady decrease in the accretion rate over the years based on the intereruption recurrence period. A comparison of the accretion rate with different models on the MWD–Ṁ plane yields the mass of a CO white dwarf, powering the H-shell flashes every ∼1 yr, to be >1.36 M ⊙ and growing with time, making M31N 2008-12a a strong candidate for the single degenerate scenario of the Type Ia supernovae progenitor. |
| first_indexed | 2024-09-25T04:15:45Z |
| format | Journal article |
| id | oxford-uuid:9993e802-cafb-4b48-9e93-3c1a6581138f |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-09-25T04:15:45Z |
| publishDate | 2024 |
| publisher | American Astronomical Society |
| record_format | dspace |
| spelling | oxford-uuid:9993e802-cafb-4b48-9e93-3c1a6581138f2024-07-20T14:10:37ZMultiwavelength Observations of Multiple Eruptions of the Recurrent Nova M31N 2008-12aJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:9993e802-cafb-4b48-9e93-3c1a6581138fEnglishJisc Publications RouterAmerican Astronomical Society2024Basu, JPavana, MAnupama, GCBarway, SSingh, KPSwain, VSrivastav, SKumar, HBhalerao, VSonith, LSSelvakumar, GWe report the optical, UV, and soft X-ray observations of the 2017–2022 eruptions of the recurrent nova M31N 2008-12a. We find a cusp feature in the r′ - and i′ -band light curves close to the peak, which could be related to jets. The geometry of the nova ejecta based on morpho-kinematic modeling of the Hα emission line indicates an extended jet-like bipolar structure. Spectral modeling indicates an ejecta mass of 10−7–10−8 M ⊙ during each eruption and an enhanced helium abundance. The supersoft source phase shows significant variability, which is anticorrelated to the UV emission, indicating a common origin. The variability could be due to the reformation of the accretion disk. We infer a steady decrease in the accretion rate over the years based on the intereruption recurrence period. A comparison of the accretion rate with different models on the MWD–Ṁ plane yields the mass of a CO white dwarf, powering the H-shell flashes every ∼1 yr, to be >1.36 M ⊙ and growing with time, making M31N 2008-12a a strong candidate for the single degenerate scenario of the Type Ia supernovae progenitor. |
| spellingShingle | Basu, J Pavana, M Anupama, GC Barway, S Singh, KP Swain, V Srivastav, S Kumar, H Bhalerao, V Sonith, LS Selvakumar, G Multiwavelength Observations of Multiple Eruptions of the Recurrent Nova M31N 2008-12a |
| title | Multiwavelength Observations of Multiple Eruptions of the Recurrent Nova M31N 2008-12a |
| title_full | Multiwavelength Observations of Multiple Eruptions of the Recurrent Nova M31N 2008-12a |
| title_fullStr | Multiwavelength Observations of Multiple Eruptions of the Recurrent Nova M31N 2008-12a |
| title_full_unstemmed | Multiwavelength Observations of Multiple Eruptions of the Recurrent Nova M31N 2008-12a |
| title_short | Multiwavelength Observations of Multiple Eruptions of the Recurrent Nova M31N 2008-12a |
| title_sort | multiwavelength observations of multiple eruptions of the recurrent nova m31n 2008 12a |
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