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Browsing by Author "Kharb, P"

Browsing by Author "Kharb, P"

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  • The parsec-scale central components of FR I radio galaxies 
    Kharb, P; Shastri, P (International Astronomical Union, 2001)
    A majority of a complete sample of 3CR FR I radio galaxies show unresolved optical nuclear sources on the scales of 0.1 arcsec. These Compact Central Cores (CCC) have been interpreted as the optical counterparts of the ...
  • Parsec-scale magnetic field structures in HEAO-1 BL Lacs 
    Kharb, P; Gabuzda, D; Shastri, P (Blackwell Publishing, 2008-02)
    We present very long baseline interferometry polarization images of an X-ray-selected sample of BL Lacertae objects belonging to the first HEAO-1 and the ROSAT–Green Bank (RGB) surveys. These are primarily high-energy-peaked ...
  • Pc-scale study of radio galaxies and BL Lacs 
    Kharb, P; Shastri, P; Gabuzda, D. C (Elsevier, 2003-10)
    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 the properties of the optical cores in ...
  • Polarization study of BL Lacertae objects on pc-scales 
    Kharb, P; Gabuzda, D; Shastri, P (Astronomical Society of India, 2002-09)
    We present results of the VLBA3 polarization observations of "X-ray selected" BL Lac objects from the HEAO-l survey and also a few from the ROSAT-Green Bank (RGB) sample. These primarily high energy peaked BL Lacs (HBLs) ...
  • A polarization study of three blazars using uGMRT at ∼600 MHz 
    Baghel, J; Silpa, S; Kharb, P; Sebastian, B; Shastri, P (Indian Academy of Sciences, 2022-12)
    We present results from our radio polarimetric study with the upgraded giant metrewave radio telescope (uGMRT) at band 4 (550–850 MHz) of three blazars: radio-loud quasars 3C390.3, 4C71.07 and BL Lac object 1ES 2344+514. ...
  • Probing the physics of narrow line regions in active galaxies. II. the siding spring southern seyfert spectroscopic snapshot survey (S7) 
    Dopita, M. A; Shastri, P; Davies, R; Kewley, L; Hampton, E; Scharwachter, J; Sutherland, R; Kharb, P; Jose, J; Bhatt, H. C; Ramya, S; Jin, C; Banfield, J; Zaw, I; Juneau, S; James, B; Shweta Srivastava (IOP Publishing, 2015-03)
    Here we describe the Siding Spring Southern Seyfert Spectroscopic Snapshot Survey (S7) and present results on 64 galaxies drawn from the first data release. The S7 uses the Wide Field Spectrograph mounted on the ANU 2.3 m ...
  • Probing the physics of narrow-line regions in active galaxies. III. accretion and cocoon shocks in the liner NGC 1052 
    Dopita, M. A; Ho, I-Ting; Dressel, L. L; Sutherland, R; Kewley, L; Davies, R; Hampton, E; Shastri, P; Kharb, P; Jose, Jessy; Bhatt, H. C; Ramya, S; Scharwachter, J; Jin, C; Banfield, J; Zaw, I; James, B; Juneau, S; Srivastava, S (IOP Publishing, 2015-03-01)
    We present Wide Field Spectrograph integral field spectroscopy and Hubble Space Telescope Faint Object Spectrograph spectroscopy for the low-ionization nuclear emission line region (LINER) galaxy NGC 1052. We infer the ...
  • Probing the Physics of Narrow-line Regions in Active Galaxies. IV. Full Data Release of the Siding Spring Southern Seyfert Spectroscopic Snapshot Survey (S7) 
    Thomas, A. D; Dopita, M. A; Shastri, P; Davies, R; Hampton, E; Kewley, L; Banfield, J; Groves, B; James, B. L; Jin, C; Juneau, S; Kharb, P; Lalitha, S; Scharwachter, J; Shalima, P; Sundar, M. N; Sutherland, R; Zaw, I (IOP Publishing, 2017-09)
    We present the second and final data release of the Siding Spring Southern Seyfert Spectroscopic Snapshot Survey (S7). Data are presented for 63 new galaxies not included in the first data release, and we provide 2D ...
  • Probing the physics of narrow-line regions of Seyfert galaxies, I. The case of NGC 5427 
    Dopita, M. A; Scharwachter, J; Shastri, P; Kewley, L. J; Davies, R; Sutherland, R; Kharb, P; Jose, J; Hampton, E; Jin, C; Banfield, J; Basurah, H; Fischer, S (EDP Sciences, 2014-06)
    Context. The spectra of the extended narrow-line regions (ENLRs) of Seyfert 2 galaxies probe the physics of the central active galaxy nucleus (AGN), since they encode the energy distribution of the ionising photons, the ...
  • Probing the physics of Seyfert galaxies using their emission-line regions 
    Shastri, P; Dopita, M; Scharwachter, J; Kewley, L; Davies, R; Sutherland, R; Kharb, P; Banfield, J; Jose, J; Ramya, S; Srivastava, S; Bhatt, H. C; Hampton, E; Jin, J; Basurah, H; Fischer, S; Gupta, M; Panda, S; Sundar, M. N; Radhakrishnan, V (AIP Publishing, 2015-12)
    Active galaxies have powerhouses of radiation in their nuclear regions that are driven by accreting super-massive black holes. The accretion system also generates outflows of ionized gas and synchrotron-emitting bipolar ...
  • Relativistic beaming and central components of radio galaxies 
    Kharb, P; Shastri, P (Astronomical Society of India, 2001)
    We present results of our study of the parsec-scale components of radio galaxies as observed at radio and optical wavelengths, in the framework of the Unified Scheme.
  • The role of radiation pressure in the narrow line regions of Seyfert host galaxies 
    Davies, R. L; Dopita, M. A; Kewley, L; Groves, B; Sutherland, R; Hampton, E. J; Shastri, P; Kharb, P; Bhatt, H. C; Scharwachter, J; Jin, C; Banfield, J; Zaw, I; James, B; Juneau, S; Srivastava, S (IOP Publishing, 2016-06-10)
    We investigate the relative significance of radiation pressure and gas pressure in the extended narrow line regions (ENLRs) of four Seyfert galaxies from the integral field Siding Spring Southern Seyfert Spectroscopic ...
  • Rotation measures across parsec-scale jets of fanaroff-Riley Type I radio galaxies 
    Kharb, P; Gabuzda, D. C; O'Dea, C. P; Shastri, P; Baum, S. A (Institute of Physics, 2009-04)
    We present the results of a parsec-scale polarization study of three FRI radio galaxies—3C66B, 3C78, and 3C264—obtained with Very Long Baseline Interferometry at 5, 8, and 15 GHz. Parsec-scale polarization has been detected ...
  • S7 : Probing the physics of seyfert galaxies through their ENLR & HII regions 
    Dopita, M. A; Shastri, P; Scharwachter, J; Kewley, L. J; Davies, R; Sutherland, R; Kharb, P; Jose, Jessy; Bhatt, H. C; Ramya, S; Hamptona, E; Jina, C; Banfielda, J; Zawa, I; Srivastavaa, Shweta; Jamesa, B (Cambridge University Press, 2015-02)
    Here we present the first results from the Siding Spring Southern Seyfert Spectroscopic Snapshot Survey (S7) which aims to investigate the physics of ∼140 radio-detected southern active Galaxies with z<0.02 through Integral ...
  • The search for binary black holes in Seyferts with double peaked emission lines 
    Kharb, P; Mousumi Das; Subramanian, S; Paragi, Z (Astronomical Society of India, 2015-04)
    We discuss results from very long baseline interferometry (VLBI) observations of two Seyfert galaxies with double peaked emission lines in their SDSS optical spectra. Such AGN are potential candidates for the presence ...
  • Searching for dual active galactic nuclei 
    Rubinur, K; Das, Mousumi; Kharb, P (Indian Academy of Sciences, 2018-02)
    Binary or dual active galactic nuclei (DAGN) are expected from galaxy formation theories. However, confirmed DAGN are rare and finding these systems has proved to be challenging. Recent systematic searches for DAGN using ...
  • Searching for dual AGN in galaxies with double-peaked emission line spectra using radio observations 
    Rubinur, K; Mousumi Das; Kharb, P (Oxford University Press on behalf of the Royal Astronomical Society, 2019-04)
    Supermassive black hole (SMBH) binaries form due to galaxy mergers and minor accretion events. When the SMBHs are accreting, they form dual or binary AGN and can give rise to double-peaked emission lines in the optical ...
  • Spitzer Mid-IR Spectroscopy of Powerful 2JY and 3CRR Radio Galaxies. II. AGN Power Indicators and Unification 
    Dicken, D; Tadhunter, C; Morganti, R; Axon, D; Robinson, A; Magagnoli, M; Kharb, P; Almeida, C. R; Mingo, B; Hardcastle, M; Nesvadba, N. P. H; Singh, V; Kouwenhoven, M. B. N; Rose, M; Spoon, H; Inskip, K. J; Holt, J (IOP Publishing, 2014-06-20)
    It remains uncertain which continuum and emission line diagnostics best indicate the bolometric powers of active galactic nuclei (AGNs), especially given the attenuation caused by the circumnuclear material and the possible ...
  • Study of star formation in dual nuclei galaxies using UVIT observations 
    Rubinur, K; Das, M; Kharb, P; Yadav, J; Mondal, C; Rahna, P. T (Oxford University Press on behalf of Royal Astronomical Society., 2024-03)
    We have used the Ultraviolet Imaging Telescope (UVIT) aboard AstroSat to study star formation in a sample of nine dual nuclei galaxies with separations <≈ 11 kpc, which is an expected outcome of galaxy mergers. To minimize ...
  • Understanding jets from sources straddling the Fanaroff-Riley divide 
    Kharb, P; Stanley, E; Lister, M; Marshall, H; O'Dea, C; Baum, S (Cambridge University Press, 2015-03)
    Results from Chandra-HST-VLA observations of 13 hybrid sources are presented. Data from ten sources in the literature are analysed along with new data from three hybrid blazars belonging to the MOJAVE sample. Studies of ...

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