Dark Matter in the Central Region of NGC 3256

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

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Official URL: https://doi.org/10.17576/jsm-2018-4706-20

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
Uncontrolled Keywords: Dark matter; Evolution; Galaxies; Individual (NGC 3256)
Subjects: Q Science > Q Science (General)
Q Science > QC Physics
Divisions: Faculty of Science > Dept 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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