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Browsing by Author "Kharb, P"

Browsing by Author "Kharb, P"

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  • A candidate dual AGN in a double-peaked emission-line galaxy with precessing radio jets 
    Rubinur, K; Mousumi Das; Kharb, P; Honey, M (Oxford University Press on behalf of the Royal Astronomical Society, 2017-03)
    We present high-resolution radio continuum observations with the Karl G. Jansky very large array at 6, 8.5, 11.5 and 15 GHz of the double-peaked emission-line galaxy 2MASXJ12032061+1319316. The radio emission has a prominent ...
  • A curved 150 pc long jet in the double-peaked emission-line AGN KISSR 434 
    Kharb, P; Vaddi, Sravani; Sebastian, B; Subramanian, S; Mousumi Das; Paragi, Z (IOP Publishing, 2019-02-01)
    Double-peaked emission lines in the narrow- and/or broad-line spectra of active galactic nuclei (AGNs) have been suggested to arise as a result of disky broad/narrow-line regions, jet–medium interaction, or the presence ...
  • The detection of Diffuse Extended Structure in 3C 273: implications for jet power 
    Punsly, B; Kharb, P (IOP Publishing, 2016-12-10)
    We present deep Very Large Array imaging of 3C 273 in order to determine the diffuse, large scale radio structure of this famous radio-loud quasar. Diffuse extended structure (radio lobes) is detected for the first time ...
  • Dissecting galaxies: separating star formation, shock excitation and AGN activity in the central region of NGC 613 
    Davies, R. L; Groves, B; Kewley, L. J; Medling, A. M; Shastri, P; Maithil, J; Kharb, P; Banfield, J; Longbottom, F; Dopita, M. A; Hampton, E. J; Scharwachter, J; Sutherland, R; Jin, C; Zaw, I; Juneau, S (Oxford University Press on behalf of the Royal Astronomical Society, 2017-08)
    The most rapidly evolving regions of galaxies often display complex optical spectra with emission lines excited by massive stars, shocks and accretion on to supermassive black holes. Standard calibrations (such as for ...
  • Dissecting galaxies: spatial and spectral separation of emission excited by star formation and AGN activity 
    Davies, R. L; Groves, B; Kewley, L; Dopita, M. A; Hampton, E. J; Shastri, P; Scharwachter, J; Sutherland, R; Kharb, P; Bhatt, H. C; Jin, C; Banfield, J; Zaw, I; James, B; Juneau, S; Srivastava, S (Oxford University Press on behalf of the Royal Astronomical Society, 2016-10-21)
    The optical spectra of Seyfert galaxies are often dominated by emission lines excited by both star formation and active galactic nucleus (AGN) activity. Standard calibrations (such as for the star formation rate) are not ...
  • Double-peaked Emission Lines Due to a Radio Outflow in KISSR 1219 
    Kharb, P; Subramanian, S; Vaddi, Sravani; Mousumi Das; Paragi, Z (IOP Publishing, 2017-09)
    We present the results from 1.5 and 5 GHz phase-referenced VLBA and 1.5 GHz Karl G. Jansky Very Large Array (VLA) observations of the Seyfert 2 galaxy KISSR 1219, which exhibits double-peaked emission lines in its optical ...
  • An Embedded active nucleus in the OH megamaser galaxy IRAS 16399-0937 
    Sales, Dinalva A; Robinson, A; Axon, D. J; Gallimore, J; Kharb, P; Curran, R. L; O'Dea, C.; Baum, S; Elitzur, M; Mittal, R (IOP Publishing Ltd, 2015-01-20)
    We present a multiwavelength study of the OH megamaser galaxy IRAS16399–0937, based on new Hubble Space Telescope (HST)/Advanced Camera for Surveys F814W and Hα+[N II] images and archive data from HST, Two Micron All Sky ...
  • The environments of accreting supermassive black holes in the nearby universe: a brief overview of the southern seyfert spectroscopic snapshot survey (S7) 
    Shastri, P; Dopita, M; Banfield, J; Thomas, A; Longbottom, F; Sundar, M. N; Chetna Duggal; Groves, B; Kharb, P; Davies, R; Kewley, L; Lalitha, S; Hampton, E; Shalima, P; James, B; S7 collaboration (AIP Publishing, 2019-06-21)
    Black holes with a mass a million times the mass of our Sun or more—i.e., supermassive black holes—tend to reside in galactic centers. The mass of a supermassive black hole scales with the mass and stellar velocity dispersion ...
  • The extreme ultraviolet deficit: jet connection in the quasar 1442+101 
    Punsly, B; Marziani, P; Kharb, P; O'Dea, C. P; Vestergaard, M (IOP Publishing, 2015-10-10)
    In previous studies, it has been shown that the long-term time-averaged jet power, Q, is correlated with spectral index in the extreme ultraviolet (EUV), αEUV (defined by n ~ n-a F EUV computed between 700 and 1100 Å ). ...
  • From nearby low luminosity AGN to High Redshift Radio Galaxies: science interests with square kilometre array 
    Kharb, P; Lal, D. V; Singh, V; Bagchi, J; Ishwara-Chandra, C. H; Hota, A; Konar, C; Wadadekar, Yogesh; Shastri, P; Mousumi Das; Baliyan, K; Nath, B. B; M. Pandey-Pommier (Springer, 2016-12)
    We present detailed science cases that a large fraction of the Indian AGN community is interested in pursuing with the upcoming Square Kilometre Array (SKA). These interests range from understanding low luminosity active ...
  • Gender status in the Indian physics profession and the way forward 
    Lekshmi, R; Shastri, P; Srubabati Goswami; Pragya, P; Vandana, N; Kharb, P; Sinha, U; Saha-Dasgupta, T; Suratna, Das; Chatterjee, Suchetana (AIP Publishing, 2019-06-21)
    The gender disparity in the Indian physics profession is stark, even compared to other scientific disciplines, reflecting the global trend. While the drivers of the disparity are clearly multiple and complex, we present ...
  • A GMRT study of Seyfert galaxies NGC 4235 and NGC 4594: evidence of episodic activity? 
    Kharb, P; Srivastava, S; Singh, V; Gallimore, J. F; Ishwara-Chandra, C. H; Ananda, H (Oxford University Press on behalf of the Royal Astronomical Society, 2016-06)
    Low-frequency observations at 325 and 610 MHz have been carried out for two ‘radio-loud’ Seyfert galaxies, NGC 4235 and NGC 4594 (Sombrero galaxy), using the Giant Meterwave Radio Telescope (GMRT). The 610 MHz total ...
  • Hubble Space Telescope Observations Of Dusty Filaments In Hercules A: Evidence For Entrainment 
    O'Dea, C. P; Baum, S. A; Tremblay, G. R; Kharb, P; Cotton, W; Perley, R (IOP Publishing, 2013-07-01)
    We present U-, V-, and I-band images of the host galaxy of Hercules A (3C 348) obtained with HST/WFC3/UVIS. We find a network of dusty filaments which are more complex and extended than seen in earlier Hubble Space Telescope ...
  • Integral field spectroscopy of the circumnuclear region of the radio galaxy Pictor A 
    Couto, G. S; Storchi-Bergmann, T; Robinson, A; Riffel, R. A; Kharb, P; Lena, D; Schnorr-Muller, A (Oxford University Press on behalf of the Royal Astronomical Society, 2016-06)
    We present optical integral field spectroscopy of the inner 2.5 × 3.4 kpc2 of the broad-line radio galaxy Pictor A, at a spatial resolution of ≈400 pc. Line emission is observed over the whole field of view, being strongest ...
  • The Intriguing Parsec-scale Radio Structure in the “Offset AGN” KISSR 102 
    Kharb, P; Lena, D; Paragi, Z; Subramanian, S; Vaddi, S; Das, M; Khatun, R (IOP Publishing, 2020-02-10)
    We report the detection of an intriguing parsec-scale radio source in the "offset AGN" candidate, KISSR 102. The elliptical host galaxy includes two optical nuclei at a projected separation of 1.54 kpc, N1 and N2, to the ...
  • J1216+0709: A Radio Galaxy with Three Episodes of AGN Jet Activity 
    Veeresh, Singh; Ishwara-Chandra, C. H; Kharb, P; Srivastava, S; Janardhan, P (IOP Publishing, 2016-08-01)
    We report the discovery of a "triple-double radio galaxy," J1216+0709, detected in deep low-frequency Giant Metrewave Radio Telescope (GMRT) observations. J1216+0709 is only the third radio galaxy, after B0925+420 and ...
  • Kiloparsec-scale radio emission in Seyfert and LINER galaxies 
    Singh, V; Ishwara-Chandra, C. H; Wadadekar, Yogesh; Beelen, Alexandre; Kharb, P (Oxford University Press on behalf of the Royal Astronomical Society, 2015-01-01)
    Seyfert and LINER galaxies are known to exhibit compact radio emission on ∼10–100 pc scales, but larger Kiloparsec-Scale Radio structures (KSRs) often remain undetected in sub-arcsec high-resolution observations. We ...
  • Kinematics and Excitation of the Nuclear Spiral in the Active Galaxy Arp 102B 
    Couto, G. S; Storchi-Bergmann, T; Axon, D. J; Robinson, A; Kharb, P; Riffel, R. A (Oxford University Press on behalf of the Royal Astronomical Society, 2013-11-11)
    We present a two-dimensional analysis of the gaseous excitation and kinematics of the inner 2.5 × 1.7 kpc2 of the low-ionization nuclear emission-line region (LINER)/Seyfert 1 galaxy Arp 102B, from optical spectra obtained ...
  • Less is more? are radiogalaxies below the fanaroff-riley break more polarised on pc-scales? 
    Kharb, P; Shastri, P; Gabuzda, D. C (Springer, 2008)
  • Low-frequency radio observations of the solar corona with arcminute angular resolution: implications for coronal turbulence and weak energy releases 
    Mugundhan, V; Ramesh, R; Barve, Indrajit V; Kathiravan, C; Gireesh, G. V. S; Kharb, P; Misra, A (IOP Publishing, 2016-11-10)
    We report on the first long baseline interferometer (length ≈8 km) observations of the solar corona at 37 MHz that were carried out recently with an angular resolution of ≈1'. The results indicate that, (1) discrete radio ...

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