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.
Full text not available from this repository.Abstract
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.
| Item Type: | Article |
|---|---|
| Funders: | University of Malaya’s HIR grant UM.S/ 625/3/HIR/24, Ministry of Science and Technology (MOST) of Taiwan through grant MOST 103-2119-M-008-017-MY3 |
| Uncontrolled Keywords: | Dark matter; Evolution; Galaxies; Individual (NGC 3256) |
| Subjects: | Q Science > Q Science (General) Q Science > QC Physics |
| Divisions: | Faculty of Science > Department of Physics |
| Depositing User: | Ms. Juhaida Abd Rahim |
| Date Deposited: | 25 Sep 2019 07:48 |
| Last Modified: | 25 Sep 2019 07:48 |
| URI: | http://eprints.um.edu.my/id/eprint/22560 |
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