Low dark matter content of the nearby early-type galaxy NGC 821
In this paper we analyze the kinematics and dynamics of the nearby early-type galaxy NGC 821 based on its globular clusters (GCs) and planetary nebulae (PNe). We use PNe and GCs to extract the kinematics of NGC 821 which is then used for the dynamical modelling based on the Jeans equation....
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Astronomical Observatory, Department of Astronomy, Belgrade
2014-01-01
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doaj-7b422773962d4465bea0e29867117c942020-11-24T23:28:57ZengAstronomical Observatory, Department of Astronomy, BelgradeSerbian Astronomical Journal1450-698X1820-92892014-01-012014188293610.2298/SAJ1488029S1450-698X1488029SLow dark matter content of the nearby early-type galaxy NGC 821Samurović S.0Vudragović A.1Jovanović M.2Ćirković M.M.3Astronomical observatory, BelgradeAstronomical observatory, BelgradeAstronomical observatory, BelgradeAstronomical observatory, BelgradeIn this paper we analyze the kinematics and dynamics of the nearby early-type galaxy NGC 821 based on its globular clusters (GCs) and planetary nebulae (PNe). We use PNe and GCs to extract the kinematics of NGC 821 which is then used for the dynamical modelling based on the Jeans equation. We apply the Jeans equation using the Newtonian mass-follows-light approach assuming constant mass-to-light ratio and find that using such an approach we can successfully fit the kinematic data. The inferred constant mass-to-light ratio, 4:2 < M=LB < 12:4 present throughout the whole galaxy, implies the lack of significant amount of dark matter. We also used three different MOND approaches and found that we can fit the kinematic data without the need for additional, dark, component. [Projekat Ministarstva nauke Republike Srbije, br. 176021: Visible and invisible matter in nearby galaxies: theory and observations]http://www.doiserbia.nb.rs/img/doi/1450-698X/2014/1450-698X1488029S.pdfdark mattergalaxies: elliptical and lenticulargalaxies: kinematics and dynamicsgalaxies: structure |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Samurović S. Vudragović A. Jovanović M. Ćirković M.M. |
spellingShingle |
Samurović S. Vudragović A. Jovanović M. Ćirković M.M. Low dark matter content of the nearby early-type galaxy NGC 821 Serbian Astronomical Journal dark matter galaxies: elliptical and lenticular galaxies: kinematics and dynamics galaxies: structure |
author_facet |
Samurović S. Vudragović A. Jovanović M. Ćirković M.M. |
author_sort |
Samurović S. |
title |
Low dark matter content of the nearby early-type galaxy NGC 821 |
title_short |
Low dark matter content of the nearby early-type galaxy NGC 821 |
title_full |
Low dark matter content of the nearby early-type galaxy NGC 821 |
title_fullStr |
Low dark matter content of the nearby early-type galaxy NGC 821 |
title_full_unstemmed |
Low dark matter content of the nearby early-type galaxy NGC 821 |
title_sort |
low dark matter content of the nearby early-type galaxy ngc 821 |
publisher |
Astronomical Observatory, Department of Astronomy, Belgrade |
series |
Serbian Astronomical Journal |
issn |
1450-698X 1820-9289 |
publishDate |
2014-01-01 |
description |
In this paper we analyze the kinematics and dynamics of the nearby early-type
galaxy NGC 821 based on its globular clusters (GCs) and planetary nebulae
(PNe). We use PNe and GCs to extract the kinematics of NGC 821 which is then
used for the dynamical modelling based on the Jeans equation. We apply the
Jeans equation using the Newtonian mass-follows-light approach assuming
constant mass-to-light ratio and find that using such an approach we can
successfully fit the kinematic data. The inferred constant mass-to-light
ratio, 4:2 < M=LB < 12:4 present throughout the whole galaxy, implies the
lack of significant amount of dark matter. We also used three different MOND
approaches and found that we can fit the kinematic data without the need for
additional, dark, component. [Projekat Ministarstva nauke Republike Srbije,
br. 176021: Visible and invisible matter in nearby galaxies: theory and
observations] |
topic |
dark matter galaxies: elliptical and lenticular galaxies: kinematics and dynamics galaxies: structure |
url |
http://www.doiserbia.nb.rs/img/doi/1450-698X/2014/1450-698X1488029S.pdf |
work_keys_str_mv |
AT samurovics lowdarkmattercontentofthenearbyearlytypegalaxyngc821 AT vudragovica lowdarkmattercontentofthenearbyearlytypegalaxyngc821 AT jovanovicm lowdarkmattercontentofthenearbyearlytypegalaxyngc821 AT cirkovicmm lowdarkmattercontentofthenearbyearlytypegalaxyngc821 |
_version_ |
1725547244395954176 |