Hα emission from gaseous structures above galactic discs
Extraplanar structures of ionized gas are detected in numerous edge-on galaxies. Whether HII regions or supernovae (SNe) responsible for its ionization is still debated. Here, we consider the Hα{\rm{H}}\alpha emissivity from shells of superbubbles driven by SNe explosions in a stellar cluster locat...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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De Gruyter
2022-03-01
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| Series: | Open Astronomy |
| Subjects: | |
| Online Access: | https://doi.org/10.1515/astro-2022-0012 |
| _version_ | 1811203785218850816 |
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| author | Vasiliev Evgenii O. Drozdov Sergey A. Shchekinov Yuri A. |
| author_facet | Vasiliev Evgenii O. Drozdov Sergey A. Shchekinov Yuri A. |
| author_sort | Vasiliev Evgenii O. |
| collection | DOAJ |
| description | Extraplanar structures of ionized gas are detected in numerous edge-on galaxies. Whether HII regions or supernovae (SNe) responsible for its ionization is still debated. Here, we consider the Hα{\rm{H}}\alpha emissivity from shells of superbubbles driven by SNe explosions in a stellar cluster located either in the midplane or above the midplane of the disc. We found that these shells form filamentary structures emitting brightly in Hα{\rm{H}}\alpha line at height of ∼0.6 \sim 0.6–1.6kpc1.6\hspace{0.33em}{\rm{kpc}} above the disc depending on cluster location and gas metallicity. The Hα{\rm{H}}\alpha surface brightness ranges within ∼10−17 \sim 1{0}^{-17}–10−16ergs−1cm−2arcsec−21{0}^{-16}\hspace{0.33em}{\rm{erg}}\hspace{0.33em}{{\rm{s}}}^{-1}\hspace{0.33em}{{\rm{cm}}}^{-2}\hspace{0.33em}{{\rm{arcsec}}}^{-2} are close to the values observed in edge-on galaxies. We conclude that the Hα{\rm{H}}\alpha emission of extraplanar structures can be explained by recombination in collisionally ionized gas of unstable shells driven by multiple SNe. |
| first_indexed | 2024-04-12T03:01:04Z |
| format | Article |
| id | doaj.art-b3cbfaeef9c24a5c8a339f23e68032ba |
| institution | Directory Open Access Journal |
| issn | 2543-6376 |
| language | English |
| last_indexed | 2024-04-12T03:01:04Z |
| publishDate | 2022-03-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | Open Astronomy |
| spelling | doaj.art-b3cbfaeef9c24a5c8a339f23e68032ba2022-12-22T03:50:40ZengDe GruyterOpen Astronomy2543-63762022-03-013119910510.1515/astro-2022-0012Hα emission from gaseous structures above galactic discsVasiliev Evgenii O.0Drozdov Sergey A.1Shchekinov Yuri A.2Lebedev Physical Institute of Russian Academy of Sciences, 53 Leninskiy Ave., Moscow, 119991, RussiaLebedev Physical Institute of Russian Academy of Sciences, 53 Leninskiy Ave., Moscow, 119991, RussiaLebedev Physical Institute of Russian Academy of Sciences, 53 Leninskiy Ave., Moscow, 119991, RussiaExtraplanar structures of ionized gas are detected in numerous edge-on galaxies. Whether HII regions or supernovae (SNe) responsible for its ionization is still debated. Here, we consider the Hα{\rm{H}}\alpha emissivity from shells of superbubbles driven by SNe explosions in a stellar cluster located either in the midplane or above the midplane of the disc. We found that these shells form filamentary structures emitting brightly in Hα{\rm{H}}\alpha line at height of ∼0.6 \sim 0.6–1.6kpc1.6\hspace{0.33em}{\rm{kpc}} above the disc depending on cluster location and gas metallicity. The Hα{\rm{H}}\alpha surface brightness ranges within ∼10−17 \sim 1{0}^{-17}–10−16ergs−1cm−2arcsec−21{0}^{-16}\hspace{0.33em}{\rm{erg}}\hspace{0.33em}{{\rm{s}}}^{-1}\hspace{0.33em}{{\rm{cm}}}^{-2}\hspace{0.33em}{{\rm{arcsec}}}^{-2} are close to the values observed in edge-on galaxies. We conclude that the Hα{\rm{H}}\alpha emission of extraplanar structures can be explained by recombination in collisionally ionized gas of unstable shells driven by multiple SNe.https://doi.org/10.1515/astro-2022-0012galaxieshalos – starburst – ism – ismbubbles – shock waves – supernova remnants |
| spellingShingle | Vasiliev Evgenii O. Drozdov Sergey A. Shchekinov Yuri A. Hα emission from gaseous structures above galactic discs Open Astronomy galaxies halos – starburst – ism – ism bubbles – shock waves – supernova remnants |
| title | Hα emission from gaseous structures above galactic discs |
| title_full | Hα emission from gaseous structures above galactic discs |
| title_fullStr | Hα emission from gaseous structures above galactic discs |
| title_full_unstemmed | Hα emission from gaseous structures above galactic discs |
| title_short | Hα emission from gaseous structures above galactic discs |
| title_sort | hα emission from gaseous structures above galactic discs |
| topic | galaxies halos – starburst – ism – ism bubbles – shock waves – supernova remnants |
| url | https://doi.org/10.1515/astro-2022-0012 |
| work_keys_str_mv | AT vasilievevgeniio haemissionfromgaseousstructuresabovegalacticdiscs AT drozdovsergeya haemissionfromgaseousstructuresabovegalacticdiscs AT shchekinovyuria haemissionfromgaseousstructuresabovegalacticdiscs |