Jets, Winds, and Bubbles in Hercules A?

Details Jets, Winds, and Bubbles in Hercules A? Jets, Winds, and Bubbles in Hercules A?

Jul 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999hst..prop.8235b&link_type=abstract

HST Proposal ID #8235

Physics

Hst Proposal Id #8235 Agn Physics

Scientific paper

The astrophysics of the launching, collimation, and propagation of jets is one of the outstanding problems in the study of powerful radio loud AGN. During the course of obtaining WFPC2 F702W snapshot images of the complete 3CR radio catalog, we came upon the remarkable discovery of a unique phenomenon which, if verified, has the potential to shed new light on the transport of energy in powerful radio jets. Our observation of the host galaxy to the powerful radio source 3C348 {Hercules A}, revealed the surprising discovery of interlocking, kpc scale rings or bubbles aligned near the radio axis and slightly offset from the galaxy nucleus {Baum Etal 1996}. The morphology of the radio and optical rings may suggest that at least in this one source, radio ejection is episodic. These initial observations were of quite low signal to noise. With STIS in 50CCD clear and F28X50LP observations, in a 25 minute snapshot observation we will increase our signal-to-noise by almost an order of magnitude, allowing us to verify the authenticity of these unique features, and obtain basic color information as well. Given the possible ramifications of these results for our understanding of jets, and the remarkableness of the results, we propose to spend a 25 minute snapshot observation verifying the result before embarking on more costly {in terms of orbits} follow up observations in Cycle 9.

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