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Titolo:
A radio and optical study of Molonglo radio sources
Autore:
Ishwara-Chandra, CH; Saikia, DJ; McCarthy, PJ; van Breugel, WJM;
Indirizzi:
TIFR, Natl Ctr Radio Astrophys, Pune 411007, Maharashtra, India TIFR PuneMaharashtra India 411007 ophys, Pune 411007, Maharashtra, India ISRO Satellite Ctr, Tech Phys Div, Bangalore 560017, Karnataka, India ISROSatellite Ctr Bangalore Karnataka India 560017 017, Karnataka, India Carnegie Inst Washington Observ, Pasadena, CA 91101 USA Carnegie Inst Washington Observ Pasadena CA USA 91101 adena, CA 91101 USA Univ Calif Lawrence Livermore Natl Lab, Inst Geophys & Planetary Phys, Livermore, CA 94550 USA Univ Calif Lawrence Livermore Natl Lab Livermore CA USA 94550 A 94550 USA
Titolo Testata:
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
fascicolo: 2, volume: 323, anno: 2001,
pagine: 460 - 470
SICI:
0035-8711(20010511)323:2<460:ARAOSO>2.0.ZU;2-S
Fonte:
ISI
Lingua:
ENG
Soggetto:
ACTIVE GALACTIC NUCLEI; COMPLETE QUASAR SAMPLE; ASYMMETRIC DEPOLARIZATION; GALAXY IDENTIFICATIONS; PHOTOMETRIC SYSTEM; CORRELATED RADIO; CATALOG; POLARIZATION; SPECTRA; LOBES;
Keywords:
galaxies : active; galaxies : nuclei; quasars : general; radio continuum : galaxies;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
30
Recensione:
Indirizzi per estratti:
Indirizzo: Ishwara-Chandra, CH TIFR, Natl Ctr Radio Astrophys, Post Bag 3, Pune 411007, Maharashtra, India TIFR Post Bag 3 Pune Maharashtra India 411007 a, India
Citazione:
C.H. Ishwara-Chandra et al., "A radio and optical study of Molonglo radio sources", M NOT R AST, 323(2), 2001, pp. 460-470

Abstract

We present multi-wavelength radio observations with the Very Large Array, and narrow- and broad-band optical observations with the 2.5-m telescope atthe Las Campanas Observatory, of a well-defined sample of high-luminosity Fanaroff-Riley class II radio galaxies and quasars, selected from the Molonglo Reference Catalogue l-Jy sample. These observations were carried out aspart of a programme to investigate the effects of orientation and environment on some of the observed properties of these sources. We examine the dependence of the Liu-Pooley relationship, which shows that radio lobes with flatter radio spectra are less depolarized, on size, identification and redshift, and show that it is significantly stronger for smaller sources, with the strength of the relationship being similar for both radio galaxies and quasars, In addition to Doppler effects, there appear to be intrinsic differences between the lobes on opposite sides. We discuss the asymmetry in brightness and location of the hotspots, and present estimates of the ages andvelocities from matched-resolution observations in the L and C bands. Narrow- and broad-band optical images of some of these sources were made to study their environments and correlate with the symmetry parameters. An extended emission-line region is seen in a quasar, and in four of the objects possible companion galaxies are seen close to the radio axis.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 31/03/20 alle ore 10:23:23