Search for Slow Bars in Two Barred Galaxies with Nuclear Structures: NGC 6951 and NGC 7716
We investigate two barred galaxies with nuclear structures, NGC 6951 and NGC 7716, to examine whether they host slow bars. Using Gemini/GMOS long-slit spectroscopy, we calculate the bar pattern speed with the Tremaine–Weinberg method and detect kinematically decoupled nuclear disks in both galaxies....
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| Format: | Article |
| Language: | English |
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IOP Publishing
2025-01-01
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| Series: | The Astrophysical Journal |
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| Online Access: | https://doi.org/10.3847/1538-4357/ade8ee |
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| author | Yun Hee Lee Ho Seong Hwang Virginia Cuomo Myeong-Gu Park Taehyun Kim Narae Hwang Hong Bae Ann Woong-Tae Kim Hyun-Jeong Kim Ji Yeon Seok Jeong Hwan Lee Yeon-Ho Choi |
| author_facet | Yun Hee Lee Ho Seong Hwang Virginia Cuomo Myeong-Gu Park Taehyun Kim Narae Hwang Hong Bae Ann Woong-Tae Kim Hyun-Jeong Kim Ji Yeon Seok Jeong Hwan Lee Yeon-Ho Choi |
| author_sort | Yun Hee Lee |
| collection | DOAJ |
| description | We investigate two barred galaxies with nuclear structures, NGC 6951 and NGC 7716, to examine whether they host slow bars. Using Gemini/GMOS long-slit spectroscopy, we calculate the bar pattern speed with the Tremaine–Weinberg method and detect kinematically decoupled nuclear disks in both galaxies. We also measure the bar length and strength using Pan-STARRs images and identify a nuclear ring in NGC 6951 and a nuclear bar in NGC 7716 from Hubble Space Telescope/Planetary Camera images. Our results indicate that NGC 6951 hosts a slow, long, and strong bar, which likely evolved through interactions with the dark matter halo and contributed to the formation of both the nuclear disk and ring. We also find hints of a rapidly rotating oval structure within the primary bar, although it is not clearly seen in the imaging data. In contrast, the primary bar in NGC 7716 is too weak to be classified as a barred galaxy, while its nuclear disk and nuclear bar are unusually large, possibly due to tidal interactions or the weakness of the primary bar. These findings suggest that slow bars may be more observed in galaxies with nuclear structures and highlight the often underappreciated role of galaxy interactions in bar evolution. |
| format | Article |
| id | doaj-art-cdea00d09b4e459aa5cf50e956798e50 |
| institution | Kabale University |
| issn | 1538-4357 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | The Astrophysical Journal |
| spelling | doaj-art-cdea00d09b4e459aa5cf50e956798e502025-08-20T03:39:19ZengIOP PublishingThe Astrophysical Journal1538-43572025-01-0198915510.3847/1538-4357/ade8eeSearch for Slow Bars in Two Barred Galaxies with Nuclear Structures: NGC 6951 and NGC 7716Yun Hee Lee0https://orcid.org/0000-0003-2779-6793Ho Seong Hwang1https://orcid.org/0000-0003-3428-7612Virginia Cuomo2https://orcid.org/0000-0001-9922-583XMyeong-Gu Park3https://orcid.org/0000-0003-1544-8556Taehyun Kim4https://orcid.org/0000-0002-5857-5136Narae Hwang5https://orcid.org/0000-0002-2013-1273Hong Bae Ann6https://orcid.org/0000-0002-9822-5608Woong-Tae Kim7https://orcid.org/0000-0003-4625-229XHyun-Jeong Kim8https://orcid.org/0000-0001-9263-3275Ji Yeon Seok9https://orcid.org/0000-0002-0070-3246Jeong Hwan Lee10https://orcid.org/0000-0003-3301-759XYeon-Ho Choi11https://orcid.org/0009-0005-5145-5165Department of Astronomy and Atmospheric Sciences, Kyungpook National University , Daegu 41566, Republic of Korea ; yhinastro@gmail.com, mgp@knu.ac.kr; Korea Astronomy and Space Science Institute (KASI) , 776 Daedeokdae-ro, Yuseong-gu, Daejeon 34055, Republic of KoreaKorea Astronomy and Space Science Institute (KASI) , 776 Daedeokdae-ro, Yuseong-gu, Daejeon 34055, Republic of Korea; Astronomy Program, Department of Physics and Astronomy, Seoul National University , 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea; SNU Astronomy Research Center, Seoul National University , 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea; Australian Astronomical Optics—Macquarie University , 105 Delhi Road, North Ryde, NSW 2113, AustraliaDepartamento de Astronomía, Universidad de La Serena , Av. Raúl Bitrán 1305, 1700000, La Serena, ChileDepartment of Astronomy and Atmospheric Sciences, Kyungpook National University , Daegu 41566, Republic of Korea ; yhinastro@gmail.com, mgp@knu.ac.krDepartment of Astronomy and Atmospheric Sciences, Kyungpook National University , Daegu 41566, Republic of Korea ; yhinastro@gmail.com, mgp@knu.ac.krKorea Astronomy and Space Science Institute (KASI) , 776 Daedeokdae-ro, Yuseong-gu, Daejeon 34055, Republic of KoreaDepartment of Earth Science Education, Pusan National University , Busan 46241, Republic of KoreaAstronomy Program, Department of Physics and Astronomy, Seoul National University , 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea; SNU Astronomy Research Center, Seoul National University , 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of KoreaKorea Astronomy and Space Science Institute (KASI) , 776 Daedeokdae-ro, Yuseong-gu, Daejeon 34055, Republic of KoreaKorea Astronomy and Space Science Institute (KASI) , 776 Daedeokdae-ro, Yuseong-gu, Daejeon 34055, Republic of KoreaAstronomy Program, Department of Physics and Astronomy, Seoul National University , 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea; SNU Astronomy Research Center, Seoul National University , 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of KoreaKorea Astronomy and Space Science Institute (KASI) , 776 Daedeokdae-ro, Yuseong-gu, Daejeon 34055, Republic of Korea; Korea National University of Science and Technology , Daejeon 34113, Republic of KoreaWe investigate two barred galaxies with nuclear structures, NGC 6951 and NGC 7716, to examine whether they host slow bars. Using Gemini/GMOS long-slit spectroscopy, we calculate the bar pattern speed with the Tremaine–Weinberg method and detect kinematically decoupled nuclear disks in both galaxies. We also measure the bar length and strength using Pan-STARRs images and identify a nuclear ring in NGC 6951 and a nuclear bar in NGC 7716 from Hubble Space Telescope/Planetary Camera images. Our results indicate that NGC 6951 hosts a slow, long, and strong bar, which likely evolved through interactions with the dark matter halo and contributed to the formation of both the nuclear disk and ring. We also find hints of a rapidly rotating oval structure within the primary bar, although it is not clearly seen in the imaging data. In contrast, the primary bar in NGC 7716 is too weak to be classified as a barred galaxy, while its nuclear disk and nuclear bar are unusually large, possibly due to tidal interactions or the weakness of the primary bar. These findings suggest that slow bars may be more observed in galaxies with nuclear structures and highlight the often underappreciated role of galaxy interactions in bar evolution.https://doi.org/10.3847/1538-4357/ade8eeBarred spiral galaxiesGalaxy structureGalaxy dynamicsGalaxy evolutionGalaxy photometryGalaxy spectroscopy |
| spellingShingle | Yun Hee Lee Ho Seong Hwang Virginia Cuomo Myeong-Gu Park Taehyun Kim Narae Hwang Hong Bae Ann Woong-Tae Kim Hyun-Jeong Kim Ji Yeon Seok Jeong Hwan Lee Yeon-Ho Choi Search for Slow Bars in Two Barred Galaxies with Nuclear Structures: NGC 6951 and NGC 7716 The Astrophysical Journal Barred spiral galaxies Galaxy structure Galaxy dynamics Galaxy evolution Galaxy photometry Galaxy spectroscopy |
| title | Search for Slow Bars in Two Barred Galaxies with Nuclear Structures: NGC 6951 and NGC 7716 |
| title_full | Search for Slow Bars in Two Barred Galaxies with Nuclear Structures: NGC 6951 and NGC 7716 |
| title_fullStr | Search for Slow Bars in Two Barred Galaxies with Nuclear Structures: NGC 6951 and NGC 7716 |
| title_full_unstemmed | Search for Slow Bars in Two Barred Galaxies with Nuclear Structures: NGC 6951 and NGC 7716 |
| title_short | Search for Slow Bars in Two Barred Galaxies with Nuclear Structures: NGC 6951 and NGC 7716 |
| title_sort | search for slow bars in two barred galaxies with nuclear structures ngc 6951 and ngc 7716 |
| topic | Barred spiral galaxies Galaxy structure Galaxy dynamics Galaxy evolution Galaxy photometry Galaxy spectroscopy |
| url | https://doi.org/10.3847/1538-4357/ade8ee |
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