Radio Galaxy Zoo Talk

SDRAGN confirmed!

  • JeanTate by JeanTate

    "The First VLBI Detection of a Spiral DRAGN Core", by Minnie Y. Mao, Jay M. Blanchard, Frazer Owen, Loránt O. Sjouwerman, Vikram Singh, Anna Scaife, Zsolt Paragi, Ray P. Norris, Emmanuel Momjian, Gia Johnson, and Ian Browne (astro-ph link):

    The existence of spiral DRAGNs challenges standard galaxy formation theories. We present the first observation of 0313−192, the archetypal spiral DRAGN, at VLBI resolutions. Spiral DRAGNs are Double Radio Sources Associated with Galactic Nuclei (DRAGNs) that are hosted by spiral galaxies. 0313−192 is an edge-on spiral galaxy that appears to host a 360 kpc double-lobed radio source. The core of this galaxy is clearly detected at L, S, and X-bands using the VLBA, signifying an ongoing active nucleus in the galaxy. This rules out the possibility that the spiral DRAGN is merely a chance alignment. The radio core has L1.4GHz∼3.0×1023W Hz−1. Radio components are detected to the South-West of the core, but there are no detections of a counterjet. Assuming a symmetric, relativistic jet, we estimate an upper limit to the inclination angle of θ≲72 degrees. The VLBI-detected radio jet components are extremely well-aligned with the larger-scale radio source suggesting little to no jet disruption or interaction with the ISM of the host galaxy.

    Posted

  • sisifolibre by sisifolibre

    Thanks for sharing. This is an interesting and easy to read paper for a begginer

    Posted