Millimetre and submillimetre continuum observations of the core and hotspots of Cygnus-A

Details Millimetre and submillimetre continuum observations of the core and hotspots of Cygnus-A Millimetre and submillimetre continuum observations of the core and hotspots of Cygnus-A

1998-10-23

arxiv.org/abs/astro-ph/9810382v1

Astronomy and Astrophysics

Astrophysics

7 pages, 3 figues, accepted for publication in MNRAS 1998

Scientific paper

10.1046/j.1365-8711.1998.02072.x

We present millimetre photometry and submillimetre imaging of the central core and two hotspots in the radio lobes of the galaxy Cygnus-A. For both hotspots and the central core the synchrotron spectrum continues smoothly from the radio to a frequency of 677 GHz. The spectral index of the hotspots is constant over our frequ ency range, with a spectral index of about -1.0, which is steeper than at lower frequencies and represents the emission from an aged population of electrons. The core is significantly flatter, with a spectral index of -0.6 +/- 0.1, suggestive of an injected spectrum with no ageing, but some evidence for steepening exists at our highest observing frequency. Although IRAS data suggest t he presence of dust in Cygnus-A, our 450 um data show no evidence of cold dust, therefore the dust component must have a temperature lying between 85 K and 37 K, respectively.

Affiliated with

Also associated with

No associations

Rating

Millimetre and submillimetre continuum observations of the core and hotspots of Cygnus-A 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 Millimetre and submillimetre continuum observations of the core and hotspots of Cygnus-A, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Millimetre and submillimetre continuum observations of the core and hotspots of Cygnus-A will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-226980