Constraints on the dynamical evolution of the galaxy group M81
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F17%3A10369256" target="_blank" >RIV/00216208:11320/17:10369256 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1093/mnras/stw3381" target="_blank" >http://dx.doi.org/10.1093/mnras/stw3381</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1093/mnras/stw3381" target="_blank" >10.1093/mnras/stw3381</a>
Alternative languages
Result language
angličtina
Original language name
Constraints on the dynamical evolution of the galaxy group M81
Original language description
According to the standard model of cosmology, galaxies are embedded in dark matter haloes that are made of particles beyond the standard model of particle physics, thus extending the mass and the size of the visible baryonic matter by typically two orders of magnitude. The observed gas distribution throughout the nearby M81 group of galaxies shows evidence for past significant galaxy-galaxy interactions but without a merger between the present-day members having occurred. This group is here studied for possible dynamical solutions within the dark matter standard model. In order to cover a comprehensive set of initial conditions, the inner three core members M81, M82 and NGC 3077 are treated as a three-body model based on Navarro-Frenk-White profiles. The possible orbits of these galaxies are examined statistically taking into account dynamical friction. Long living, non-merging initial constellations that allow multiple galaxy-galaxy encounters comprise unbound galaxies only, which are arriving from a far distance and happen to simultaneously encounter each other within the recent 500 Myr. Our results are derived by the employment of two separate and independent statistical methods, namely a Markov chain Monte Carlo method and the genetic algorithm using the SAP system environment. The conclusions reached are confirmed by high-resolution simulations of live self-consistent systems (N-body calculations). Given the observed positions of the three galaxies, the solutions found comprise predictions for their proper motions.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10308 - Astronomy (including astrophysics,space science)
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2017
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Monthly Notices of the Royal Astronomical Society
ISSN
0035-8711
e-ISSN
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Volume of the periodical
467
Issue of the periodical within the volume
1
Country of publishing house
GB - UNITED KINGDOM
Number of pages
17
Pages from-to
273-289
UT code for WoS article
000398418900018
EID of the result in the Scopus database
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