SUMMARY OF SEQUENCE NUMBER 700115
SUMMARY OF SEQUENCE NUMBER 700115
Title: MAPPING HIGH-VELOCITY SHOCKS ALONG THE JETS OF NGC 4258
Observer: CECIL
Subject Category: Active Galaxies and Quasars
Seq: 700115 ObsId: 00810
Long-term Plan bin: 24-Apr-2000
ABSTRACT
A deep HRC-S+LETG image will be made of the twisted, X-ray emitting jets of NGC 4258. The X-ray jets are 3.5-arcmin long, several arcsecs wide, and are prominent in radio continuum, optical emission line, and soft X-ray images. They are known to have thermal X-ray spectra, kinematical discontinuities, and gaseous excitation consistent with high-velocity (500-700 km/s) entraining shocks. Our AXAF grating exposure will have sufficient counts and spectral resolution to establish shock velocities and gas abundances at a dozen points in the jet flow. These data will be used to constrain the time evolution of the outflow, and hence the dynamical evolution of the AGN. There will be general insights on jet entrainment and shock physics in other astrophysical contexts.
TARGET SUMMARY
| TARGET NAME |
RA | DEC |
TIME |
SI |
GRAT |
TYPE |
TC |
ROLL |
PRE |
PHASE |
MULTI |
PRI |
| NGC 4258 |
184.754167 | 47.300000 |
150.0000 |
HRC-S |
LETG |
GO |
no |
yes |
no |
no |
no |
5 |
IMAGES
(NOTE: RASS images currently only available for targets LTS scheduled on or after Apr-09-2000)
PARAMETERS
Obscat Parameters
