Dark Matter in the Central Region of NGC 3256
We investigated the central mass distribution of the luminous infrared galaxy NGC 3256 at a distance of 35 Mpc by using CO(1-0) observations of the Atacama Large Millimeter and sub-millimeter Array (ALMA) and near-IR data of the Two Micron Sky Survey (2MASS). We found that there is a huge amount of...
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| Format: | Article |
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Penerbit Universiti Kebangsaan Malaysia
2018
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| author | Ali, Israa Abdulqasim Mohammed Hwang, Chorng-Yuan Abidin, Zamri Zainal Plunkett, Adele Laurie |
| author_facet | Ali, Israa Abdulqasim Mohammed Hwang, Chorng-Yuan Abidin, Zamri Zainal Plunkett, Adele Laurie |
| author_sort | Ali, Israa Abdulqasim Mohammed |
| collection | UM |
| description | We investigated the central mass distribution of the luminous infrared galaxy NGC 3256 at a distance of 35 Mpc by using CO(1-0) observations of the Atacama Large Millimeter and sub-millimeter Array (ALMA) and near-IR data of the Two Micron Sky Survey (2MASS). We found that there is a huge amount of invisible dynamical mass (4.48 × 1010 ) in the central region of the galaxy. The invisible mass is likely caused by some dark matter, which might have a cuspy dark matter profile. We note that this dark matter is difficult to explain with the conventional Modified Newtonian Dynamics (MOND) model, which is only applicable at a low acceleration regime, whereas the acceleration at the central region of the galaxy is relatively strong. Therefore, this discovery might pose a challenge to the conventional MOND models. |
| first_indexed | 2024-03-06T05:57:20Z |
| format | Article |
| id | um.eprints-22560 |
| institution | Universiti Malaya |
| last_indexed | 2024-03-06T05:57:20Z |
| publishDate | 2018 |
| publisher | Penerbit Universiti Kebangsaan Malaysia |
| record_format | dspace |
| spelling | um.eprints-225602019-09-25T07:48:45Z http://eprints.um.edu.my/22560/ Dark Matter in the Central Region of NGC 3256 Ali, Israa Abdulqasim Mohammed Hwang, Chorng-Yuan Abidin, Zamri Zainal Plunkett, Adele Laurie Q Science (General) QC Physics We investigated the central mass distribution of the luminous infrared galaxy NGC 3256 at a distance of 35 Mpc by using CO(1-0) observations of the Atacama Large Millimeter and sub-millimeter Array (ALMA) and near-IR data of the Two Micron Sky Survey (2MASS). We found that there is a huge amount of invisible dynamical mass (4.48 × 1010 ) in the central region of the galaxy. The invisible mass is likely caused by some dark matter, which might have a cuspy dark matter profile. We note that this dark matter is difficult to explain with the conventional Modified Newtonian Dynamics (MOND) model, which is only applicable at a low acceleration regime, whereas the acceleration at the central region of the galaxy is relatively strong. Therefore, this discovery might pose a challenge to the conventional MOND models. Penerbit Universiti Kebangsaan Malaysia 2018 Article PeerReviewed Ali, Israa Abdulqasim Mohammed and Hwang, Chorng-Yuan and Abidin, Zamri Zainal and Plunkett, Adele Laurie (2018) Dark Matter in the Central Region of NGC 3256. Sains Malaysiana, 47 (6). pp. 1241-1249. ISSN 0126-6039, DOI https://doi.org/10.17576/jsm-2018-4706-20 <https://doi.org/10.17576/jsm-2018-4706-20>. https://doi.org/10.17576/jsm-2018-4706-20 doi:10.17576/jsm-2018-4706-20 |
| spellingShingle | Q Science (General) QC Physics Ali, Israa Abdulqasim Mohammed Hwang, Chorng-Yuan Abidin, Zamri Zainal Plunkett, Adele Laurie Dark Matter in the Central Region of NGC 3256 |
| title | Dark Matter in the Central Region of NGC 3256 |
| title_full | Dark Matter in the Central Region of NGC 3256 |
| title_fullStr | Dark Matter in the Central Region of NGC 3256 |
| title_full_unstemmed | Dark Matter in the Central Region of NGC 3256 |
| title_short | Dark Matter in the Central Region of NGC 3256 |
| title_sort | dark matter in the central region of ngc 3256 |
| topic | Q Science (General) QC Physics |
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