BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//ZContent.net//ZapCalLib 1.0//EN
CALSCALE:GREGORIAN
METHOD:PUBLISH
BEGIN:VEVENT
DTSTART;TZID=Atlantic/Canary:20100112T000000
DTEND;TZID=Atlantic/Canary:20100112T010000
UID:iactalks-8
X-WR-CALNAME: IAC Talks: Open Astronomy Seminars
X-ORIGINAL-URL: /iactalks/Talks/view/8
CREATED:2010-01-12T00:00:00+00:00
X-WR-CALDESC: IAC Talks upcomming talks
SUMMARY:On the curvature of dust lanes in galactic bars
DESCRIPTION:On the curvature of dust lanes in galactic bars\nDr. Inmaculada
  Martínez Valpuesta\n\nWe test the theoretical prediction that the straig
 htest dust lanes in bars are found in strongly barred galaxies, or more sp
 ecifically, that the degree of curvature of the dust lanes is inversely pr
 oportional to the strength of the bar. The test uses archival images of ba
 rred galaxies for which a reliable non-axisymmetric torque parameter (Qb) 
 and the radius at which Qb has been measured (r(Qb)) have been published i
 n the literature. Our results confirm the theoretical prediction but show 
 a large spread that cannot be accounted for by measurement errors. We simu
 late 238 galaxies with different bar and bulge parameters in order to inve
 stigate the origin of the spread in the dust lane curvature versus Qb rela
 tion. From these simulations, we conclude that the spread is greatly reduc
 ed when describing the bar strength as a linear combination of the bar par
 ameters Qb and the quotient of the major and minor axes of the bar, a/b. T
 hus, we conclude that the dust lane curvature is predominantly determined 
 by the parameters of the bar.
END:VEVENT
END:VCALENDAR