77 citations · 182 across the 20 of their papers we have counts for
14 papers · 1 filter
Dynamics and geometry of the inner sub-parsec-scale jet in 3C 279 observed with the Event Horizon Telescope
Hendrik Mueller, Sebastiano D. von Fellenberg, Ai-Ling Zeng +275
The 2021 Event Horizon Telescope observations resolve the innermost jet region of the blazar 3C279 with unprecedented detail. The reconstructed images consistently reveal a compact…
Full-polarization millimeter wavelength variability of Sagittarius A* during the 2018 EHT campaign
Ezequiel Albentosa-Ruiz, Jasmin E. Washington, Nicola Marchili +272
Sagittarius A* (Srg A*), the supermassive black hole at the center of the Milky Way, provides a unique laboratory to study accretion dynamics and plasma processes near the event ho…
Jet-mode feedback in NGC 5972: insights from resolved MUSE, GMRT and VLA observations
Arshi Ali, Biny Sebastian, Darshan Kakkad +10
NGC 5972, a Voorwerp galaxy, features a helical-shaped extended emission-line region (EELR) with a radius > 10 kpc and a S-shaped radio structure spanning about 470 kpc. We use VLT…
Demographics of black holes at 100 R scales: accretion flows, jets, and shadows
Dhanya G. Nair, Neil M. Nagar, Venkatessh Ramakrishnan +87
Using the Event Horizon Telescope (EHT), the gravitationally lensed rings around the supermassive black holes (SMBHs) in Messier 87 (M87) and Sagittarius A* (Sgr A*) have now been…
The Quasar Feedback Survey: characterising CO excitation in quasar host galaxies
S. J. Molyneux, G. Calistro Rivera, C. De Breuck +15
We present a comprehensive study of the molecular gas properties of 17 Type 2 quasars at 0.2 from the Quasar Feedback Survey (L > ), sel…
A Kpc-scale Radio Polarization Study of PG BL Lacs with the uGMRT
Janhavi Baghel, P. Kharb, T. Hovatta +3
We present here uGMRT band 4 (~650MHz) polarization images of 8 BL~Lac objects belonging to the Palomar-Green (PG) `blazar' sample. A large fraction of the sources (~63%) reveal co…
PG1004+130: Hybrid Morphology Source or a Restarted FRII? A uGMRT Polarimetric Investigation
Salmoli Ghosh, P. Kharb, J. Baghel +1
We present here the polarization image of the hybrid morphology (HYMOR) and broad-absorption line (BAL) quasar PG1004+130 at 694~MHz obtained with the upgraded Giant Metrewave Radi…
Radio Polarization: A Powerful Resource for Understanding the Blazar Divide
Janhavi Baghel, P. Kharb, Silpa S. +2
With high-sensitivity kiloparsec-scale radio polarimetry, we can examine the jet-medium interactions and get a better understanding of the blazar divide in radio-loud (RL) AGN. We…
Looking for Signatures of AGN Feedback in Radio-Quiet AGN
Preeti Kharb, Silpa Sasikumar
(Abridged) In this article, we discuss the state of ``AGN feedback'' in radio-quiet (RQ) AGN. This study involves heterogeneous samples of nearby Seyfert and LINER galaxies as well…
AGN Feedback Through Multiple Jet Cycles in the Seyfert Galaxy NGC 2639
Vaishnav V. Rao, Preeti Kharb, Rubinur K. +7
The Seyfert galaxy NGC 2639 was known to exhibit three episodes of AGN jet/lobe activity. We present here the upgraded Giant Metrewave Radio Telescope (uGMRT) 735 MHz image of NGC…
Quasar Feedback Survey: Multi-phase outflows, turbulence and evidence for feedback caused by low power radio jets inclined into the galaxy disk
A. Girdhar, C. M. Harrison, V. Mainieri +18
We present a study of a luminous, z=0.15, type-2 quasar (log [L([OIII])/(erg/s)]=42.8) from the Quasar Feedback Survey. It is classified as 'radio-quiet' (log [L(1.4 GHz)/(W/Hz)]=2…
A Polarization Study of 3 Blazars using the uGMRT at ~600 MHz
Janhavi Baghel, Silpa S., P. Kharb +2
We present results from our radio polarimetric study with the upgraded Giant Metrewave Radio Telescope (uGMRT) at Band 4 (550-850 MHz) of 3 blazars: radio-loud quasars 3C390.3, 4C7…
AGN Jets and Winds in Polarised Light: The Case of Mrk 231
Silpa S., P. Kharb, C. P. O' Dea +4
We present the results of a multi-frequency, multi-scale radio polarimetric study with the Very Large Array (VLA) of the Seyfert 1 galaxy and BALQSO, Mrk 231. We detect complex tot…
Probing the origin of low-frequency radio emission in PG quasars with the uGMRT -- I
Silpa S., P. Kharb, L. C. Ho +3
We present the results from 685 MHz observations with the upgraded Giant Metrewave Radio Telescope (uGMRT) of 22 quasars belonging to the Palomar-Green (PG) quasar sample. Only fou…