Contemporaneous X-ray and VLBI radio observations of the quasar NRAO 140

Details Contemporaneous X-ray and VLBI radio observations of the quasar NRAO 140 Contemporaneous X-ray and VLBI radio observations of the quasar NRAO 140

Nov 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...334..552m&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 334, Nov. 15, 1988, p. 552-559.

Astronomy and Astrophysics

Astrophysics

50

Quasars, Very Long Base Interferometry, X Ray Sources, Brightness Distribution, Exosat Satellite, Flux Density, Heao 1, Radio Spectra, X Ray Absorption

Scientific paper

New observations and earlier ones are combined to present a time history of the X-ray emission and radio structure of the quasar NRAO 140 between 1978 and 1985. The compact radio structure reveals a jet composed of seven components, with two components closest to the 'core' separating superluminally from the core. The X-ray photoelectric absorption cutoff moved to significantly higher energy in 1980 compared to 1979 and 1985. This corresponds to an increase in the column density of cold gas along the line of sight in 1980. The X-ray absorption in 1979 and 1985 is consistent with that expected from H I and H2 in the Galaxy. The X-ray flux declined by about a factor of two between 1979 and 1985, while the flux density of the compact radio core declined by a similar factor between 1980 and 1984. This coincidence, combined with the statistical correlations between compact radio and X-ray fluxes of quasars, suggests that there is a direct causal connection between the compact radio core and the X-ray emitting region.

Affiliated with

Also associated with

No associations

Rating

Contemporaneous X-ray and VLBI radio observations of the quasar NRAO 140 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Contemporaneous X-ray and VLBI radio observations of the quasar NRAO 140, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Contemporaneous X-ray and VLBI radio observations of the quasar NRAO 140 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1825726