Počet záznamů: 1
Quadruple-peaked spectral line profiles as a tool to constrain gravitational potential of shell galaxies
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SYSNO ASEP 0387366 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Quadruple-peaked spectral line profiles as a tool to constrain gravitational potential of shell galaxies Tvůrce(i) Ebrová, Ivana (ASU-R)
Jílková, L. (CZ)
Jungwiert, Bruno (ASU-R) ORCID, RID
Křížek, Miroslav (ASU-R)
Bílek, M. (CZ)
Bartošková, Kateřina (ASU-R)
Skalická, T. (CZ)
Stoklasová, Ivana (ASU-R) RID, ORCIDZdroj.dok. Astronomy & Astrophysics. - : EDP Sciences - ISSN 0004-6361
Roč. 545, September (2012), A33/1-A33/15Poč.str. 15 s. Jazyk dok. eng - angličtina Země vyd. FR - Francie Klíč. slova galaxies ; kinematics and dynamics ; numerical methods Vědní obor RIV BN - Astronomie a nebeská mechanika, astrofyzika CEP GD205/08/H005 GA ČR - Grantová agentura ČR LC06014 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy Institucionální podpora ASU-R - RVO:67985815 UT WOS 000309254900033 DOI 10.1051/0004-6361/201219940 Anotace 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. Pracoviště Astronomický ústav Kontakt Radka Svašková, bibl@asu.cas.cz, Tel.: 323 620 326 Rok sběru 2013
Počet záznamů: 1