Poster abstract details
SMA observations of magnetic fields in VLA1623 and L1551 IRS5
Abstract
We present SMA polarization observations of Class 0 source VLA 1623 and Class I source L1551 IRS 5. The goal is to investigate the evolution of magnetic field geometry during star
formation. Previously, SMA has successfully detected strong dust polarizations towards two
Class 0 sources, NGC1333 IRAS4A and IRAS 16293-2422, and their field geometries are in general consistent with hour-glass shape,
a signature geometry of star formation theories with magnetic fields playing dominating roles.
Therefore, observing protostellar sources at similar or later stages will be essential to
further examine the star formation theories.
Although the fluxes of VLA 1623 and L1551 IRS 5 are both comparable to those of NGC1333 IRAS4A and IRAS16293-2422, our observations show that very little polarization was detected towards these two sources.
This result may give us hints on the dissipation time scale of the magnetic fields during star formation.
formation. Previously, SMA has successfully detected strong dust polarizations towards two
Class 0 sources, NGC1333 IRAS4A and IRAS 16293-2422, and their field geometries are in general consistent with hour-glass shape,
a signature geometry of star formation theories with magnetic fields playing dominating roles.
Therefore, observing protostellar sources at similar or later stages will be essential to
further examine the star formation theories.
Although the fluxes of VLA 1623 and L1551 IRS 5 are both comparable to those of NGC1333 IRAS4A and IRAS16293-2422, our observations show that very little polarization was detected towards these two sources.
This result may give us hints on the dissipation time scale of the magnetic fields during star formation.