Dark matter in the Central Region of NGC 3256

Israa Abdulqasim Mohammed Ali, and Hwang, Chorng-Yuan and Zamri Zainal Abidin, and Plunkett, Adele Laurie (2018) Dark matter in the Central Region of NGC 3256. Sains Malaysiana, 47 (6). pp. 1241-1249. ISSN 0126-6039


Official URL: http://www.ukm.my/jsm/malay_journals/jilid47bil6_2...


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
Keywords:Dark matter; Evolution; Galaxies; Individual (NGC 3256)
Journal:Sains Malaysiana
ID Code:12129
Deposited By: ms aida -
Deposited On:24 Sep 2018 07:49
Last Modified:28 Sep 2018 22:35

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