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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:0
UID:UW-Physics-Event-3490
DTSTART:20141002T203000Z
DTEND:20141002T220000Z
DTSTAMP:20240319T060831Z
LAST-MODIFIED:20140926T131321Z
LOCATION:4421 Sterling Hall
SUMMARY:Filaments in simulations of Molecular Cloud FOrmation\, Astron
omy Colloquium\, Gilberto Gomez\, UNAM Mexico
DESCRIPTION:In this talk\, we report on the characterization of filame
nts that develop self-consistently in a numerical simulation of cloud
formation by colliding flows. The filaments are not in equilibrium at
any time\, but instead are long-lived flow features. The filaments are
long-lived because they accrete from their environment while simultan
eously accreting onto the clumps within them\; they are essentially th
e locus where the flow changes from accreting in two dimensions to acc
reting in one dimension.
\n
\nIn the simulation\, two prominen
t filaments are formed\, with lengths ∼15 pc and masses ∼600Msun a
bove density n ∼ 1e3 cm−3. The density profile exhibits a central
flattened core of size ∼0.3 pc and an envelope that decays as r^−2
.5 in reasonable agreement with observations. Accretion onto the filam
ent reaches a maximum linear density rate of ∼30Msun Myr^−1 pc^−
1.
URL:https://www.physics.wisc.edu/events/?id=3490
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