G0.087-0.087, a highly polarized flat spectrum filament near the Galactic Centre Arc

Abstract

32 GHz observations with the Effelsberg 100-m telescope revealed a highly polarized Galactic Centre filament: G0.087-0.087, running parallel to the well-known Arc structure. It has a similar flat spectrum, but it is an order of magnitude weaker. G0.087-0.087 is about 2.5' or 6.2 pc long and located at the western boundary of the expanding molecular cloud G0.11-0.11. This unusual cloud is also visible in X-rays and known to interact on its eastern periphery with the Arc. Acceleration of highly relativistic particles at the surface of G0.11-0.11 seems necessary to explain the properties of both structures. The new filament supports previous findings on the existence of a strong poloidal magnetic field throughout the Galactic Centre region.

4 pages with 4 figures. Accepted for publication in A&A

References in corpus (2)

• The Origin of X-ray Emission from a Galactic Center Molecular Cloud: Low Energy Cosmic Ray Electrons
• A New System of Parallel Isolated Nonthermal Filaments Near the Galactic Center: Evidence for a Local Magnetic Field Gradient

Cited by in corpus (12)

• A $\lambda$20cm Survey of the Galactic Center Region I: Detection of Numerous Linear Filaments
• The 1.28 GHz MeerKAT Galactic Center Mosaic
• The Origin of Diffuse X-ray and $\gamma$-ray Emission from the Galactic Center Region: Cosmic Ray Particles
• New Nonthermal Filaments at the Galactic Center: Are They Tracing a Globally Ordered Magnetic Field?
• Dark Matter and Synchrotron Emission from Galactic Center Radio Filaments
• Turbulent Origin of the Galactic-Center Magnetic Field: Nonthermal Radio Filaments
• Thermal SiO and H${}^{13}$CO${}^{+}$ Line Observations of the Dense Molecular Cloud G0.11$-$0.11 in the Galactic Center region
• 74 MHz Nonthermal Emission from Molecular Clouds: Evidence for a Cosmic Ray Dominated Region at the Galactic Center
• Heightened Faraday Complexity in the inner 1 kpc of the Galactic Centre
• A Constraint on the Organization of the Galactic Center Magnetic Field Using Faraday Rotation
• XMM-Newton observations of the Galactic Centre Region - II: The soft thermal emission
• Imprints of Molecular Clouds in Radio Continuum Images