Physics
Scientific paper
Dec 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997hst..prop.7256c&link_type=abstract
HST Proposal ID #7256
Physics
Hst Proposal Id #7256 Agn/Quasars
Scientific paper
New evidence suggests that compact relativistic jets from AGN and QSOs {powered by up to 10^9 M_sun black holes} have extraordinarily close analogues in the jets from "microquasars" with roughly 10 M_sun black holes {Sams, Sunyaev and Eckart Nature 382, 47 1996}. We propose NICMOS polarimetric imaging of the superluminal jets in the Galactic microquasar GRS1915+105. If the jet emission is synchrotron radiation from blobs of ultrarelativistic plasma, the polarization will be perpendicular to the magnetic field, and its intensity is expected to range from 2-5%. If instead the jets are scattering off of an ambient medium, the polarization will be higher, up to 60%. Hence polarization can distinguish between the two possible emission models, and clinch the nature of the NIR jets. These observations will help us to understand the detailed physics of the jets not only in GRS1915+105, but in AGN and Quasars as well. In addition, we propose parallel wide band NIR spectroscopy of the entire source in order to search for emission lines which will a} constrain the nature of the X-ray heating, and b} pin down the emission geometry.
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