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SUMMARY:Kinematical asymmetry in the dwarf irregular galaxy WLM and a pert
 urbed halo potential
DTSTART;VALUE=DATE-TIME:20230322T092900Z
DTEND;VALUE=DATE-TIME:20230322T093100Z
DTSTAMP;VALUE=DATE-TIME:20241114T092431Z
UID:indico-contribution-256@meetings.aip.de
DESCRIPTION:Speakers: Maryam Khademi (IPM \, Institute for Research in Fun
 damental Sciences (IPM)\, School of Astronomy)\nTo investigate the dynamic
 al nature of the kinematic asymmetry in the isolated gas-rich dwarf irregu
 lar galaxy W LM in the Local Group\, we first examine whether an m = 1 per
 turbation in the halo potential could be a mechanism creating such kinemat
 ical asymmetry. \nBy fitting a theoretical rotational velocity associated 
 with an m = 1 perturbation in the halo potential model to the observed dat
 a\, we show that such a lopsided halo potential model can explain the asym
 metry in the kinematic data reasonably well.\nIn addition\, we study the k
 inematical classification of the velocity field of WLM with various method
 s\, and based on a kinemetry analysis\, we find that it is possible for WL
 M to lie in the transition region\, where the disk and merger coexist. Thu
 s\, a merger may indeed be one of the possible origins of the dark matter 
 halo lopsidedness for this isolated galaxy.\n\nhttps://iaus379.aip.de/even
 t/20/contributions/256/
LOCATION:Haus H\, Telegrafenberg
URL:https://iaus379.aip.de/event/20/contributions/256/
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