Formation of Andromeda II via a gas-rich major merger and an interaction with M31
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F17%3A00506505" target="_blank" >RIV/67985815:_____/17:00506505 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1093/mnras/stw2510" target="_blank" >https://doi.org/10.1093/mnras/stw2510</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1093/mnras/stw2510" target="_blank" >10.1093/mnras/stw2510</a>
Alternative languages
Result language
angličtina
Original language name
Formation of Andromeda II via a gas-rich major merger and an interaction with M31
Original language description
Andromeda II (And II) has been known for a few decades but only recently observations have unveiled new properties of this dwarf spheroidal galaxy. The presence of two stellar populations, the bimodal star formation history (SFH) and an unusual rotation velocity of And II put strong constrains on its formation and evolution. Following Lokas et al., we propose a detailed model to explain the main properties of And II involving (1) a gas-rich major merger between two dwarf galaxies at high redshift in the field and (2) a close interaction with M31 about 5 Gyr ago. The model is based on N-body/hydrodynamical simulations including gas dynamics, star formation and feedback. One simulation is designed to reproduce the gas-rich major merger explaining the origin of stellar populations and the SFH. Other simulations are used to study the effects of tidal forces and the ram-pressure stripping during the interaction between And II and M31. The model successfully reproduces the SFH of And II including the properties of stellar populations, its morphology, kinematics and the lack of gas. Further improvements to the model are possible via joint modelling of all processes and better treatment of baryonic physics.
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
1365-2966
e-ISSN
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Volume of the periodical
464
Issue of the periodical within the volume
3
Country of publishing house
GB - UNITED KINGDOM
Number of pages
13
Pages from-to
2717-2729
UT code for WoS article
000393647600017
EID of the result in the Scopus database
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