Sign on

SAO/NASA ADS Astronomy Abstract Service

· Find Similar Abstracts (with default settings below)
· Electronic Refereed Journal Article (HTML)
· Full Refereed Journal Article (PDF/Postscript)
· On-line Data
· References in the article
· Citations to the Article (75) (Citation History)
· Refereed Citations to the Article
· SIMBAD Objects (26)
· NED Objects (6)
· Also-Read Articles (Reads History)
·
· Translate This Page
Title:
A Survey of Extended Radio Jets in Active Galactic Nuclei with Chandra and the Hubble Space Telescope: First Results
Authors:
Sambruna, Rita M.; Maraschi, L.; Tavecchio, F.; Urry, C. Megan; Cheung, C. C.; Chartas, G.; Scarpa, R.; Gambill, Jessica K.
Affiliation:
AA(Department of Physics and Astronomy and School of Computational Sciences, MS 3F3, 4400 University Drive, George Mason University, Fairfax, VA 22030; ), AB(Osservatorio Astronomico di Brera, via Brera 28, Milan I-20121, Italy), AC(Osservatorio Astronomico di Brera, via Brera 28, Milan I-20121, Italy), AD(Department of Astronomy, P.O. Box 208101, Yale University, New Haven, CT 06520), AE(Department of Physics, MS 057, Brandeis University, Waltham, MA 02454), AF(Department of Astronomy and Astrophysics, 525 Davey Lab, Pennsylvania State University, University Park, PA 16802), AG(European Southern Observatory, Avenida Alonso de Cordova 3107, Vitacura, Casilla 19001, Santiago 19, Chile), AH(School of Computational Sciences, 4400 University Drive, George Mason University, Fairfax, VA 22030)
Publication:
The Astrophysical Journal, Volume 571, Issue 1, pp. 206-217. (ApJ Homepage)
Publication Date:
05/2002
Origin:
UCP
ApJ Keywords:
Galaxies: Jets, Galaxies: Quasars: General, X-Rays: Galaxies
Abstract Copyright:
(c) 2002: The American Astronomical Society
DOI:
10.1086/339859
Bibliographic Code:
2002ApJ...571..206S

Abstract

We present the first results from an X-ray and optical survey of a sample of radio jets in active galactic nuclei with Chandra and the Hubble Space Telescope (HST). We focus here on the first six sources observed in X-ray, in four of which a bright X-ray jet was detected for the first time. In three out of the four cases, optical emission from the jet is also detected in our HST images. We compare the X-ray morphology with the radio as derived from improved processing of archival Very Large Array data, and we construct spectral energy distributions (SEDs) for the most conspicuous emission knots. In most cases, the SEDs, together with the similarity of the X-ray and radio morphologies, favor an inverse Compton origin for the X-rays. The most likely origin of the seed photons is the cosmic microwave background, implying the jets are still relativistic on kiloparsec scales. However, in the first knot of the PKS 1136-135 jet, X-rays are likely produced via the synchrotron process. In all four cases, bulk Lorentz factors of a few are required. The radio maps of the two jets not detected by either Chandra or HST suggest that they are less beamed at large scales than the other four detected sources. Our results demonstrate that, at the sensitivity and resolution of Chandra, X-ray emission from extragalactic jets is common, yielding essential information on their physical properties.
Bibtex entry for this abstract   Preferred format for this abstract (see Preferences)
   

Find Similar Abstracts:

Use: Authors
Title
Keywords (in text query field)
Abstract Text
Return: Query Results Return    items starting with number
Query Form
Database: Astronomy
Physics
arXiv e-prints
    


SAO/NASA ADS Homepage | ADS Sitemap | Query Form | Basic Search | Preferences | HELP | FAQ