151 citations · 3.7k across the 163 of their papers we have counts for
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Physical Properties of Very Powerful FRII Radio Galaxies
Christopher P. O'Dea, Ruth A. Daly, Preeti Kharb +2
We estimate ages and physical properties of powerful radio galaxies. An analysis of new multi-wavelength VLA observations of eleven very powerful classical double (FRIIb) radio gal…
Chandra evidence for AGN feedback in the spiral galaxy NGC 6764
J. H. Croston, M. J. Hardcastle, P. Kharb +2
We report the Chandra detection of X-ray emission spatially coincident with the kpc-scale radio bubbles in the nearby (D_L ~ 31 Mpc) AGN-starburst galaxy NGC 6764. The X-ray emissi…
Magnetic Fields in Blazar Pc-scale Jets - Possible connection to Spin Rates of Black holes ?
P. Kharb, M. L. Lister, P. Shastri
We re-examine the differences observed in the pc-scale magnetic field geometry of high and low optical polarization Quasars (HPQs, LPRQs) using the MOJAVE sample. We find that, as…
Parsec-scale Magnetic-Field Structures in HEAO-1 BL Lacs
P. Kharb, D. Gabuzda, P. Shastri
We present very long baseline interferometry polarization images of an X-ray selected sample of BL Lacertae objects belonging to the first High Energy Astronomy Observatory (HEAO-1…
The Acceleration History of the Universe and the Properties of the Dark Energy
Ruth A. Daly, S. G. Djorgovski
The model-independent method of using type Ia supernovae proposed and developed by Daly and Djorgovski (2003, 2004) has been applied to the Riess et al. (2007) supernovae sample. A…
Improved Constraints on the Acceleration History of the Universe and the Properties of the Dark Energy
Ruth A. Daly, S. G. Djorgovski, Kenneth A. Freeman +4
We extend and apply a model-independent analysis method developed earlier by Daly & Djorgovski to new samples of supernova standard candles, radio galaxy and cluster standard ruler…
WFPC2 LRF Imaging of Emission Line Nebulae in 3CR Radio Galaxies
G. C. Privon, C. P. O'Dea, S. A. Baum +5
We present HST/WFPC2 Linear Ramp Filter images of high surface brightness emission lines (either [OII], [OIII], or H-alpha+[NII]) in 80 3CR radio sources. We overlay the emission l…
Cosmological Studies with Radio Galaxies and Supernovae
Ruth A. Daly, Matthew P. Mory, C. P. O'Dea +4
Physical sizes of extended radio galaxies can be employed as a cosmological "standard ruler", using a previously developed method. Eleven new radio galaxies are added to our previo…
The Properties and Gaseous Environments of Powerful Classical Double Radio Galaxies
Ruth Daly, C. O'Dea, P. Kharb +3
The properties of a sample of 31 very powerful classical double radio galaxies with redshifts between zero and 1.8 are studied. The source velocities, beam powers, ambient gas dens…
A Study of 13 Powerful Classical Double Radio Galaxies
P. Kharb, C. O'Dea, S. Baum +4
We have carried out an extensive study of a sample of 13 large, powerful Fanaroff-Riley type II radio galaxies with the Very Large Array in multiple configurations at 330 MHz, 1.4,…
A Radio Study of 13 Powerful FRII Radio Galaxies
P. Kharb, C. O'Dea, S. Baum +4
We have observed a sample of 13 large, powerful Fanaroff-Riley type II radio galaxies with the Very Large Array in multiple configurations and at multiple frequencies. We have comb…
A Radio Study of the Seyfert galaxy Markarian 6: Implications for Seyfert life-cycles
P. Kharb, C. P. O'Dea, S. A. Baum +2
We have carried out an extensive radio study with the Very Large Array on the Seyfert 1.5 galaxy Mrk 6 and imaged a spectacular radio structure in the source. The radio emission oc…
When less is more: Are radio galaxies below the Fanaroff-Riley break more polarized on parsec scales ?
P. Kharb, P. Shastri, D. C. Gabuzda
We present images showing the first detections of polarization on parsec scales in the nuclei of four Fanaroff-Riley type I (low-luminosity) radio galaxies. Observations with Very…
Optical Nuclei of Radio-loud AGN and the Fanaroff-Riley Divide
P. Kharb, P. Shastri
We investigate the nature of the point-like optical ``cores'' that have been found in the centres of the host galaxies of a majority of radio galaxies by the Hubble Space Telescope…
Magnetic Field Geometry in "Red" and "Blue" BL Lacs
P. Kharb, D. C. Gabuzda, P. Shastri
We compare the systematics of the magnetic field geometry in the "red" low-energy peaked BL Lacs (LBLs) and "blue" high-energy peaked BL Lacs (HBLs) using VLBI polarimetric images.…
Pc-scale study of Radio galaxies & BL Lacs
P. Kharb, P. Shastri, D. C. Gabuzda
We study two aspects of the differences between Active Galactic Nuclei (AGN) of the two Fanaroff-Riley types in order to investigate the causes of the F-R divide. We (a) contrast t…
Magnetic Field Geometry of the Broad Line Radio Galaxy 3C111
P. Kharb, D. Gabuzda, W. Alef +2
Very Long Baseline Polarimetric observations of the Broad Line Radio galaxy 3C111 performed in July and September of 1996 at 8 and 43 GHz reveal rapidly evolving parsec-scale radio…