Spitzer Observations of Centaurus A: Infrared Synchrotron Emission from the Northern Lobe

Abstract

We present measurements obtained with the Spitzer Space Telescope in five bands from 3.6-24 microns of the northern inner radio lobe of Centaurus A, the nearest powerful radio galaxy. We show that this emission is synchrotron in origin. Comparison with ultraviolet observations from GALEX shows that diffuse ultraviolet emission exists in a smaller region than the infrared but also coincides with the radio jet. We discuss the possibility, that synchrotron emission is responsible for the ultraviolet emission and conclude that further data are required to confirm this.

arXiv comment4 pages, accepted by ApJL

References in corpus (10)

• The Infrared Array Camera (IRAC) for the Spitzer Space Telescope
• The Spitzer Space Telescope Mission
• The Galaxy Evolution Explorer: A Space Ultraviolet Survey Mission
• SUMSS: A Wide-Field Radio Imaging Survey of the Southern Sky. I. Science goals, survey design and instrumentation
• Centaurus A - NGC 5128
• Radio and X-ray observations of the jet in Centaurus A
• X-ray Emission from the Hot ISM and SW Radio Lobe of the Nearby Radio Galaxy Centaurus A
• Centaurus A: multiple outbursts or bursting bubble?
• The infrared jet in Centaurus A: multiwavelength constraints on emission mechanisms and particle acceleration
• An optical-IR jet in 3C133

Cited by in corpus (11)

• High-energy particle acceleration at the radio-lobe shock of Centaurus A
• Resolving the innermost parsec of Centaurus A at mid-infrared wavelengths
• Long Term Monitoring of the Dynamics and Particle Acceleration of Knots in the Jet of Centaurus A
• The $\gamma$-ray spectrum of the core of Centaurus A as observed with H.E.S.S. and Fermi-LAT
• LABOCA observations of nearby, active galaxies
• A Chandra Study of the Lobe/ISM Interactions Around the Inner Radio Lobes of Centaurus A: Constraints on the Temperature Structure and Transport Processes
• Ultra-High Energy Cosmic-Ray Acceleration in the Jet of Centaurus A
• An Infrared Study of the Large-scale Jet in Quasar PKS 1136-135
• The Infrared Jet in 3C31
• Physical conditions in nearby active galaxies correlated with ultra-high-energy cosmic rays detected by the Pierre Auger Observatory
• Optical Detection of Star Formation in a Cold Dust Cloud in the Counterjet Direction of Centaurus A