85 citations · 385 across the 29 of their papers we have counts for
16 papers · 1 filter
Tidal Grinding of Dwarf Galaxies in Cluster Environments
Sanjaya Paudel, Suk-Jin Yoon, Tek Prasad Adhikari +4
Dwarf elliptical galaxies (dEs) dominate galaxy clusters and provide key constraints on environmentally driven galaxy evolution. Here we examine whether the projected shapes of dEs…
A constant pressure model for the warm absorber in Mrk 509
Krzysztof Hryniewicz, Agata Różańska, Tek Prasad Adhikari +3
We present the analysis of 900 ks high-resolution RGS XMM-Newton observations of the nearby Seyfert galaxy Mrk 509 with the use of a self-consistent warm absorber (WA) model. We pe…
Changing Look AGN: A study of Optical/UV and the Highly Ionized Fe K X-ray Line Flux Variations Using Photo-Ionization Simulations
Tek P. Adhikari, Santanu Mondal, Zhicheng He +2
Significant variability in broad emission line strengths of active galactic nuclei (AGN) over months to years has been observed, often accompanied by intrinsic continuum changes. S…
Exploring the central region of NGC 1365 in the ultraviolet domain
Kshama Sara Kurian, C. S. Stalin, Dominika Wylezalek +6
Active galactic nuclei (AGN) feedback and its impact on their host galaxies are critical to our understanding of galaxy evolution. Here, we present a combined analysis of new high…
Dusty plasma in active galactic nuclei
Bożena Czerny, Michal Zajaček, Mohammad-Hassan Naddaf +10
Since many years we know that dust in the form of the dusty-molecular torus is responsible for the obscuration in active galactic nuclei (AGN) at large viewing angles and thus for…
The multi-phase environment in the centre of Centaurus A
A. Borkar, T. P. Adhikari, A. Różańska +6
We study the multi-phase medium in the vicinity of the active galactic nucleus Centaurus A (Cen A). Combined high-resolution observations with the ALMA and Chandra observatories in…
What shapes the Absorption Measure Distribution in AGN outflows
T. P. Adhikari, A. Różańska, K. Hryniewicz +2
The Absorption Measure Distribution (AMD) in the X-ray outflows of Seyfert active galactic nuclei (AGN) describes the distribution of absorbing column density as a function of ioni…
Intermediate-line Emission in AGNs: The Effect of Prescription of the Gas Density
T. P. Adhikari, K. Hryniewicz, A. Różańska +2
The requirement of intermediate line component in the recently observed spectra of several AGNs points to possibility of the existence of a physically separate region between broad…
Absorption Measure Distribution in AGN
T. P. Adhikari, A. Różańska, K. Hryniewicz +1
The most common observed feature of the X-ray outflows in active galactic nuclei (AGN) is their broad ionization distribution spanning up to 5 orders of magnitude in ionizat…
On the Intermediate Line Region in AGNs
T. P. Adhikari, A. Rozanska, K. Hryniewicz +2
In this paper we explore the intermediate line region (ILR) by using the photoionisation simulations of the gas clouds present at different radial distances from the center, corres…
Multi-phase environment of compact galactic nuclei: the role of the Nuclear Star Cluster
A. Różańska, D. Kunneriath, B. Czerny +2
We study the conditions for the onset of Thermal Instability in the innermost regions of compact galactic nuclei, where the properties of the interstellar environment are governed…
The intermediate line region in active galactic nuclei
T. P. Adhikari, A. Różańska, B. Czerny +2
We show that the recently observed suppression of the gap between the broad line region (BLR) and the narrow line region (NLR) in some AGN can be fully explained by an increase of…
SALT long-slit spectroscopy of HE 0435-4312: fast displacement in the Mg II emission line
J. Sredzinska, B. Czerny, K. Hryniewicz +6
The Mg II emission line is visible in the optical band for intermediate redshift quasars (0.4 < z < 1.6) and it is thus an extremely important tool to measure the black hole mass a…
On the warm absorber in AGN outflow
T. P. Adhikari, A. Rozanska, M. Sobolewska +1
Warm absorber (WA) is an ionised gas present in the line of sight to the AGN central engine. The effect of the absorber is imprinted in the absorption lines observed in X-ray spect…
Absorption Measure Distribution in Mrk 509
T. P. Adhikari, A. Różańska, M. Sobolewska +1
In this paper we model the observed absorption measure distribution (AMD) in Mrk 509, which spans three orders of magnitude in ionization level with a single-zone absorber in press…
The dust origin of the Broad Line Region and the model consequences for AGN unification scheme
Bozena Czerny, Justyna Modzelewska, Francesco Petrogalli +7
We propose a very simple physical mechanism responsible for the formation of the Low Ionization Line part of the Broad Line Region in Active Galactic Nuclei. It explains the scalin…