Compact Jets from Galactic Black Holes

Details Compact Jets from Galactic Black Holes Compact Jets from Galactic Black Holes

Sep 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004sptz.prop.3246t&link_type=abstract

Spitzer Proposal ID #3246

Physics

Scientific paper

While Galactic and extra-galactic accreting black holes can emit powerful, collimated jets, the mechanism for jet production as well as many of the basic properties of jets remain unknown. A recent development in the study of Galactic black hole X-ray binaries is the discovery that these systems produce ``compact'' jets that remain steady for time periods of weeks with powers that are significant when compared to the overall energetics of the system. Compact jet spectra rise with frequency in the radio band, and, although they have not been previously studied in the far-infrared (FIR), spectral fits to radio and near-infrared (NIR) fluxes suggest that they are often brightest in the FIR. We propose Target of Opportunity observations using the MIPS instrument on-board Spitzer for black holes at times when they are producing compact jets. We are requesting for time to observe two targets, and our program requires 6 hours per target (including all overheads). When combined with simultaneous or near-simultaneous X-ray and ground-based observations in the radio, near-IR, and optical, our program will provide unprecedented multi-wavelength coverage of the compact jet phenomenon in these systems. We plan to use the multi-wavelength spectra along with a theoretical model that accounts for emission from the accretion disk as well as the jet to distinguish between possible emission mechanisms and to constrain the physical properties of the jet.

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