New Nonthermal Filaments at the Galactic Center: Are They Tracing a Globally Ordered Magnetic Field?

Details New Nonthermal Filaments at the Galactic Center: Are They Tracing a Globally Ordered Magnetic Field? New Nonthermal Filaments at the Galactic Center: Are They Tracing a Globally Ordered Magnetic Field?

2004-02-03

arxiv.org/abs/astro-ph/0402061v1

Astrophys.J. 607 (2004) 302-308

Astronomy and Astrophysics

Astrophysics

Astrophysical Journal, Accepted

Scientific paper

10.1086/383233

New high-resolution, wide-field 90 cm VLA observations of the Galactic Center region by Nord et al. have revealed twenty nonthermal filament (NTF) candidates. We report 6 cm polarization observations of six of these. All of the candidates have the expected NTF morphology, and two show extended polarization confirming their identification as NTFs. One of the new NTFs appears to be part of a system of NTFs located in the Sgr B region, 64 pc in projection north of Sgr A. These filaments cross the Galactic plane with an orientation similar to the filaments in the Galactic Center Radio Arc. They extend the scale over which the NTF phenomena is known to occur to almost 300 pc along the Galactic plane. Another NTF was found in the Galactic plane south of the Sgr C filament but with an orientation of 45 degrees to the Galactic plane. This is only the second of 12 confirmed NTFs that is not oriented perpendicular to the Galactic plane. An additional candidate in the Sgr C region was resolved into multiple filamentary structures. Polarization was detected only at the brightness peak of one of the filaments. Several of these filaments run parallel to the Galactic plane and can be considered additional evidence for non-poloidal magnetic fields at the GC. Together the 90 and 6 cm observations indicate that the Galactic center magnetic field may be more complex than a simple globally ordered dipole field.

Affiliated with

Also associated with

No associations

Rating

New Nonthermal Filaments at the Galactic Center: Are They Tracing a Globally Ordered Magnetic Field? 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 New Nonthermal Filaments at the Galactic Center: Are They Tracing a Globally Ordered Magnetic Field?, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and New Nonthermal Filaments at the Galactic Center: Are They Tracing a Globally Ordered Magnetic Field? will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-545431