The dark matter distribution of NGC 5921
We used the neutral atomic hydrogen data of the Very Large Array for the spiral galaxy NGC 5921 with z = 0.0045 at the distance of 22.4 Mpc, to investigate the nature of dark matter. The investigation was based on two theories, namely, dark matter and Modified Newtonian Dynamics (MOND). We presented...
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| Format: | Article |
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Springer Verlag (Germany)
2018
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| author | Ali, Israa Abdulqasim Mohammed Hashim, Norsiah Abidin, Zamri Zainal |
| author_facet | Ali, Israa Abdulqasim Mohammed Hashim, Norsiah Abidin, Zamri Zainal |
| author_sort | Ali, Israa Abdulqasim Mohammed |
| collection | UM |
| description | We used the neutral atomic hydrogen data of the Very Large Array for the spiral galaxy NGC 5921 with z = 0.0045 at the distance of 22.4 Mpc, to investigate the nature of dark matter. The investigation was based on two theories, namely, dark matter and Modified Newtonian Dynamics (MOND). We presented the kinematic analysis of the rotation curve with two models of dark matter, namely, the Burkert and NFW profiles. The results revealed that the NFW halo model can reproduce the observed rotation curve, with χred2≈1, while the Burkert model is unable to fit the observation data. Therefore, the dark matter density profile of NGC 5921 can be presented as a cuspy halo. We also tried to investigate the observed rotation curve of NGC 5921 with MOND, along with the possible assumption on baryonic matter and distance. We note that MOND is still incapable of mimicking the rotation curve with the observed data of the galaxy. |
| first_indexed | 2024-03-06T05:57:19Z |
| format | Article |
| id | um.eprints-22559 |
| institution | Universiti Malaya |
| last_indexed | 2024-03-06T05:57:19Z |
| publishDate | 2018 |
| publisher | Springer Verlag (Germany) |
| record_format | dspace |
| spelling | um.eprints-225592019-09-25T07:44:52Z http://eprints.um.edu.my/22559/ The dark matter distribution of NGC 5921 Ali, Israa Abdulqasim Mohammed Hashim, Norsiah Abidin, Zamri Zainal Q Science (General) QA Mathematics QC Physics We used the neutral atomic hydrogen data of the Very Large Array for the spiral galaxy NGC 5921 with z = 0.0045 at the distance of 22.4 Mpc, to investigate the nature of dark matter. The investigation was based on two theories, namely, dark matter and Modified Newtonian Dynamics (MOND). We presented the kinematic analysis of the rotation curve with two models of dark matter, namely, the Burkert and NFW profiles. The results revealed that the NFW halo model can reproduce the observed rotation curve, with χred2≈1, while the Burkert model is unable to fit the observation data. Therefore, the dark matter density profile of NGC 5921 can be presented as a cuspy halo. We also tried to investigate the observed rotation curve of NGC 5921 with MOND, along with the possible assumption on baryonic matter and distance. We note that MOND is still incapable of mimicking the rotation curve with the observed data of the galaxy. Springer Verlag (Germany) 2018 Article PeerReviewed Ali, Israa Abdulqasim Mohammed and Hashim, Norsiah and Abidin, Zamri Zainal (2018) The dark matter distribution of NGC 5921. Indian Journal of Physics, 92 (4). pp. 409-415. ISSN 0973-1458, DOI https://doi.org/10.1007/s12648-017-1119-7 <https://doi.org/10.1007/s12648-017-1119-7>. https://doi.org/10.1007/s12648-017-1119-7 doi:10.1007/s12648-017-1119-7 |
| spellingShingle | Q Science (General) QA Mathematics QC Physics Ali, Israa Abdulqasim Mohammed Hashim, Norsiah Abidin, Zamri Zainal The dark matter distribution of NGC 5921 |
| title | The dark matter distribution of NGC 5921 |
| title_full | The dark matter distribution of NGC 5921 |
| title_fullStr | The dark matter distribution of NGC 5921 |
| title_full_unstemmed | The dark matter distribution of NGC 5921 |
| title_short | The dark matter distribution of NGC 5921 |
| title_sort | dark matter distribution of ngc 5921 |
| topic | Q Science (General) QA Mathematics QC Physics |
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