Star Formation in the Lopsided Galaxy Arp 291
We have investigated the star formation process taking place in the lopsided galaxy Arp 291, based on narrowband images in the H α , [N ii ] λ 6583, and [O iii ] λ 5007 emission lines, obtained using the modern tunable photometer MaNGaL at the Caucasus Mountain Observatory. We have diagnosed 30 star...
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IOP Publishing
2025-01-01
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| Online Access: | https://doi.org/10.3847/1538-4357/adab73 |
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| author | Irina S. Proshina Dmitriy V. Oparin |
| author_facet | Irina S. Proshina Dmitriy V. Oparin |
| author_sort | Irina S. Proshina |
| collection | DOAJ |
| description | We have investigated the star formation process taking place in the lopsided galaxy Arp 291, based on narrowband images in the H α , [N ii ] λ 6583, and [O iii ] λ 5007 emission lines, obtained using the modern tunable photometer MaNGaL at the Caucasus Mountain Observatory. We have diagnosed 30 star-forming (SF) regions by means of the Baldwin–Phillips–Terlevich method. The oxygen abundance of the ionized gas in the SF regions varies in the range from 8.17 ± 0.04 to 8.47 ± 0.16 dex, which is typical for spiral and irregular galaxies, and shows an anticorrelation with the surface density of current star formation rates. Star formation in the lopsided galaxy Arp 291 occurs in separate clumps comparable in size to those observed in spiral and lenticular galaxies, at a rate typical for these types of galaxies. The clumps of current star formation are located irregularly in the distorted spiral arms of Arp 291. Possible causes of lopsidedness of the galaxy are discussed. |
| format | Article |
| id | doaj-art-aea271406b8341d0ba98b3880072b7cc |
| institution | Kabale University |
| issn | 1538-4357 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IOP Publishing |
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| series | The Astrophysical Journal |
| spelling | doaj-art-aea271406b8341d0ba98b3880072b7cc2025-02-07T08:56:58ZengIOP PublishingThe Astrophysical Journal1538-43572025-01-01980111810.3847/1538-4357/adab73Star Formation in the Lopsided Galaxy Arp 291Irina S. Proshina0Dmitriy V. Oparin1Sternberg Astronomical Institute of the Lomonosov Moscow State University , University av. 13, Moscow, 119234, Russia ; ipro@sai.msu.ruSpecial Astrophysical Observatory of the Russian Academy of Sciences , Nizhnij Arkhyz, 369167, RussiaWe have investigated the star formation process taking place in the lopsided galaxy Arp 291, based on narrowband images in the H α , [N ii ] λ 6583, and [O iii ] λ 5007 emission lines, obtained using the modern tunable photometer MaNGaL at the Caucasus Mountain Observatory. We have diagnosed 30 star-forming (SF) regions by means of the Baldwin–Phillips–Terlevich method. The oxygen abundance of the ionized gas in the SF regions varies in the range from 8.17 ± 0.04 to 8.47 ± 0.16 dex, which is typical for spiral and irregular galaxies, and shows an anticorrelation with the surface density of current star formation rates. Star formation in the lopsided galaxy Arp 291 occurs in separate clumps comparable in size to those observed in spiral and lenticular galaxies, at a rate typical for these types of galaxies. The clumps of current star formation are located irregularly in the distorted spiral arms of Arp 291. Possible causes of lopsidedness of the galaxy are discussed.https://doi.org/10.3847/1538-4357/adab73Late-type galaxiesExtragalactic astronomyStar formationStar forming regions |
| spellingShingle | Irina S. Proshina Dmitriy V. Oparin Star Formation in the Lopsided Galaxy Arp 291 The Astrophysical Journal Late-type galaxies Extragalactic astronomy Star formation Star forming regions |
| title | Star Formation in the Lopsided Galaxy Arp 291 |
| title_full | Star Formation in the Lopsided Galaxy Arp 291 |
| title_fullStr | Star Formation in the Lopsided Galaxy Arp 291 |
| title_full_unstemmed | Star Formation in the Lopsided Galaxy Arp 291 |
| title_short | Star Formation in the Lopsided Galaxy Arp 291 |
| title_sort | star formation in the lopsided galaxy arp 291 |
| topic | Late-type galaxies Extragalactic astronomy Star formation Star forming regions |
| url | https://doi.org/10.3847/1538-4357/adab73 |
| work_keys_str_mv | AT irinasproshina starformationinthelopsidedgalaxyarp291 AT dmitriyvoparin starformationinthelopsidedgalaxyarp291 |