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BEGIN:VEVENT
DTSTART;TZID=Atlantic/Canary:20110517T000000
DTEND;TZID=Atlantic/Canary:20110517T010000
UID:iactalks-272
X-WR-CALNAME: IAC Talks: Open Astronomy Seminars
X-ORIGINAL-URL: /iactalks/Talks/view/272
CREATED:2011-05-17T00:00:00+01:00
X-WR-CALDESC: IAC Talks upcomming talks
SUMMARY:Galactic Dynamics to Explain Outer Disc Features in Spiral Galaxies
DESCRIPTION:Galactic Dynamics to Explain Outer Disc Features in Spiral Gala
 xies\nDr. Martín López Corredoira\n\nMilky Way and most spiral galaxies 
 present some features in the outer part of its disk such as S-warping or U
 -warping, flaring, lopsidedness, truncation/non-truncation and others, bot
 h for the stellar and the gas component. In the present talk, I will revie
 w some of the galactic dynamics hypotheses which try to explain these feat
 ures: either in terms of gravitational interaction, magnetic fields, accre
 tion of intergalactic matter or others. The gravitational interaction may 
 be among the different components of the galaxy or between the spiral gala
 xy and another companion galaxy. The accretion of intergalactic matter may
  be either into the halo, with a later gravitational interaction between t
 he misaligned halo and the disc, or directly onto the disc. The phenomena 
 of the outer disc in spiral galaxies might be produced by more than a mech
 anism. Nonetheless, the hypothesis of accretion of intergalactic matter on
 to the disc presents several advantages over its competitors, since it exp
 lains most of the relevant observed features, whereas other hypotheses onl
 y explain them partially.
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