Andromeda II as a merger remnant
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F14%3A00440007" target="_blank" >RIV/67985815:_____/14:00440007 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1093/mnrasl/slu128" target="_blank" >http://dx.doi.org/10.1093/mnrasl/slu128</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1093/mnrasl/slu128" target="_blank" >10.1093/mnrasl/slu128</a>
Alternative languages
Result language
angličtina
Original language name
Andromeda II as a merger remnant
Original language description
Using N-body simulations, we study the origin of prolate rotation observed in the kinematic data for Andromeda II (And II), a dwarf spheroidal satellite of M31. We propose an evolutionary model for the origin of And II involving a merger between two discy dwarf galaxies with different disc scalelengths. The dwarfs are placed on a radial orbit towards each other with their angular momenta inclined by 90 deg. The merger remnant forms a stable triaxial galaxy with rotation only around the longest axis whose origin is naturally explained as due to the symmetry of the initial configuration and the conservation of angular momentum components along the direction of the merger. The stars originating from the two dwarfs show significantly different surface density profiles while having very similar kinematics as required by the data. We also study an alternative scenario for the formation of And II, via tidal stirring of a discy dwarf. While intrinsic rotation occurs naturally in this model as
Czech name
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Czech description
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Classification
Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BN - Astronomy and celestial mechanics, astrophysics
OECD FORD branch
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Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2014
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
445
Issue of the periodical within the volume
1
Country of publishing house
GB - UNITED KINGDOM
Number of pages
5
Pages from-to
"L6"-"L10"
UT code for WoS article
000344231000002
EID of the result in the Scopus database
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