A Cool Filament Crossing the Warm Protostar DR 21(OH): Geometry, Kinematics, Magnetic Vectors, and Pressure Balance

Details A Cool Filament Crossing the Warm Protostar DR 21(OH): Geometry, Kinematics, Magnetic Vectors, and Pressure Balance A Cool Filament Crossing the Warm Protostar DR 21(OH): Geometry, Kinematics, Magnetic Vectors, and Pressure Balance

Jan 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006apj...636..332v&link_type=abstract

The Astrophysical Journal, Volume 636, Issue 1, pp. 332-347.

Astronomy and Astrophysics

Astronomy

19

Ism: Dust, Extinction, Infrared: Ism, Ism: Magnetic Fields, Polarization, Stars: Formation

Scientific paper

Here we made multiconstituent (gas/dust/field), homogeneous maps of a length of a vertical filament including DR 21(OH) proper. We observed at a radial velocity around -3.5 km s-1 the 12CO, 13CO, and C18O gas in the J=3-2 lines, as well as the thermal dust continuum near 850 μm and the dust's linear polarization properties, all near the same wavelength (850 μm) and with the same angular resolution (14") using the same antenna (James Clerk Maxwell Telescope [JCMT]). We deduce the energy components in the cool filament, and we compute the pressure components there and those in the surrounding region. The vertical filament has a total pressure composed about equally of turbulent energy and magnetic energy. The magnetic field in the vertical filament appears to go across the filament and has an estimated strength of 100-200 μG in the sky plane. Near the map center, we find a low-velocity outflow from DR 21(OH), with a pattern of blue southeast gas and red northwest gas. For the central DR 21(OH) protostar, our JCMT polarimetric data allow us to infer a median ``plane-of-sky field'' of 780 μG oriented mainly east-west (as seen with the JCMT beam of 14"), which is comparable to the published Zeeman data along the line of sight (-530 μG).

Affiliated with

Also associated with

No associations

Rating

A Cool Filament Crossing the Warm Protostar DR 21(OH): Geometry, Kinematics, Magnetic Vectors, and Pressure Balance does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with A Cool Filament Crossing the Warm Protostar DR 21(OH): Geometry, Kinematics, Magnetic Vectors, and Pressure Balance, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A Cool Filament Crossing the Warm Protostar DR 21(OH): Geometry, Kinematics, Magnetic Vectors, and Pressure Balance will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1284196