About: Quadruple-peaked spectral line profiles as a tool to constrain gravitational potential of shell galaxies

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About: Quadruple-peaked spectral line profiles as a tool to constrain gravitational potential of shell galaxies Goto Sponge NotDistinct Permalink

An Entity of Type : http://linked.opendata.cz/ontology/domain/vavai/Vysledek, within Data Space : linked.opendata.cz associated with source document(s)

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	The resulting line-of-sight velocity distributions are more complex than previously predicted due to nonzero phase velocity of the shells. In principle, each of the Merrifield & Kuijken (1998) peaks splits into two, giving a quadruple-peaked line profile, which allows more precise determination of the potential of the host galaxy and contains additional information. We find simple analytical expressions that connect the positions of the four peaks of the line profile and the mass distribution of the galaxy, namely, the circular velocity at the given shell radius and the propagation velocity of the shell. The analytical expressions were applied to a test-particle simulation of a radial minor merger, and the potential of the simulated host galaxy was successfully recovered. Shell kinematics can thus become an independent tool to determine the content and distribution of the dark matter in shell galaxies up to similar to 100 kpc from the center of the host galaxy. The resulting line-of-sight velocity distributions are more complex than previously predicted due to nonzero phase velocity of the shells. In principle, each of the Merrifield & Kuijken (1998) peaks splits into two, giving a quadruple-peaked line profile, which allows more precise determination of the potential of the host galaxy and contains additional information. We find simple analytical expressions that connect the positions of the four peaks of the line profile and the mass distribution of the galaxy, namely, the circular velocity at the given shell radius and the propagation velocity of the shell. The analytical expressions were applied to a test-particle simulation of a radial minor merger, and the potential of the simulated host galaxy was successfully recovered. Shell kinematics can thus become an independent tool to determine the content and distribution of the dark matter in shell galaxies up to similar to 100 kpc from the center of the host galaxy. (en)
Title	Quadruple-peaked spectral line profiles as a tool to constrain gravitational potential of shell galaxies Quadruple-peaked spectral line profiles as a tool to constrain gravitational potential of shell galaxies (en)
skos:prefLabel	Quadruple-peaked spectral line profiles as a tool to constrain gravitational potential of shell galaxies Quadruple-peaked spectral line profiles as a tool to constrain gravitational potential of shell galaxies (en)
skos:notation	RIV/67985815:_____/12:00387366!RIV13-GA0-67985815
http://linked.open...avai/riv/aktivita	I P S
http://linked.open...avai/riv/aktivity	I, P(GD205/08/H005), P(LC06014), S
http://linked.open...iv/cisloPeriodika	September
http://linked.open...vai/riv/dodaniDat	2013
http://linked.open...aciTvurceVysledku	Křížek, Miroslav Jungwiert, Bruno Ebrová, Ivana Stoklasová, Ivana Bartošková, Kateřina
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Astronomický ústav AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	163718
http://linked.open...ai/riv/idVysledku	RIV/67985815:_____/12:00387366
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	galaxies; kinematics and dynamics; numerical methods (en)
http://linked.open.../riv/klicoveSlovo	galaxies kinematics and dynamics numerical methods
http://linked.open...odStatuVydavatele	FR - Francouzská republika
http://linked.open...ontrolniKodProRIV	[2C49DB09F9FC]
http://linked.open...i/riv/nazevZdroje	Astronomy & Astrophysics
http://linked.open...in/vavai/riv/obor	BN
http://linked.open...ichTvurcuVysledku	5 (xsd:int)
http://linked.open...cetTvurcuVysledku	8 (xsd:int)
http://linked.open...vavai/riv/projekt	Physics of Sun, stars, and stellar systems Center for Theoretical Astrophysics
http://linked.open...UplatneniVysledku	2012
http://linked.open...v/svazekPeriodika	545
http://linked.open...iv/tvurceVysledku	Ebrová, Ivana Jungwiert, Bruno Jílková, L. Křížek, Miroslav Bartošková, Kateřina Stoklasová, Ivana Bílek, M. Skalická, T.
http://linked.open...ain/vavai/riv/wos	000309254900033
issn	0004-6361
number of pages	15 (xsd:int)
http://bibframe.org/vocab/doi	10.1051/0004-6361/201219940

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