271 citations · 4.6k across the 192 of their papers we have counts for
20 papers · 1 filter
Magnetically arrested disks in FR I radio galaxies
Han He, Bei You, Ning Jiang +5
A sample of 17 FR I radio galaxies constructed from the 3CR catalog, which is characterized by edge-darkened radio structures, is studied. The optical core luminosities derived fro…
Modeling photometric reverberation mapping data for the next generation of big data surveys. Quasar accretion disks sizes with the LSST
F. Pozo Nuñez, C. Bruckmann, S. Desamutara +5
Photometric reverberation mapping can detect the radial extent of the accretion disc (AD) in Active Galactic Nuclei by measuring the time delays between light curves observed in di…
Quasar UV/X-ray relation luminosity distances are shorter than reverberation-measured radius-luminosity relation luminosity distances
Narayan Khadka, Michal Zajaček, Raj Prince +5
We use measurements of 59/58 quasars (QSOs), over a redshift range , to do a comparative study of the radius--luminosity () and X-rayUV luminosity…
Standardizing reverberation-measured C IV time-lag quasars, and using them with standardized Mg II quasars to constrain cosmological parameters
Shulei Cao, Michal Zajaček, Swayamtrupta Panda +3
We use 38 C IV quasar (QSO) reverberation-mapped (RM) observations, which span eight orders of magnitude in luminosity and the redshift range , to simul…
Cosmology Intertwined: A Review of the Particle Physics, Astrophysics, and Cosmology Associated with the Cosmological Tensions and Anomalies
Elcio Abdalla, Guillermo Franco Abellán, Amin Aboubrahim +200
In this paper we will list a few important goals that need to be addressed in the next decade, also taking into account the current discordances between the different cosmological…
Do reverberation-measured H quasars provide a useful test of cosmology?
Narayan Khadka, Mary Loli Martínez-Aldama, Michal Zajaček +2
We use 118 H quasar (QSO) observations in the redshift range to simultaneously constrain cosmological model parameters and QSO 2-parameter radius-lumin…
Standardizing reverberation-measured Mg II time-lag quasars, by using the radius-luminosity relation, and constraining cosmological model parameters
Narayan Khadka, Zhefu Yu, Michal Zajaček +3
We use 78 reverberation-measured Mg II time-lag quasars (QSOs) in the redshift range to constrain cosmological parameters in six different cosmological mo…
Dark energy constraints from quasar observations
B. Czerny, M. L. Martínez-Aldama, G. Wojtkowska +9
Recent measurements of the parameters of the Concordance Cosmology Model (CDM) done in the low-redshift Universe with Supernovae Ia/Cepheids, and in the distant Universe done wi…
Can reverberation-measured quasars be used for cosmology?
Mary Loli Martínez-Aldama, Bożena Czerny, Damian Kawka +4
Quasars have been proposed as a new class of standard candles analogous to Supernovae, as their large redshift range and high luminosities make them excellent candidates. Reverbera…
Tracing dark energy with quasars
J. Średzińska, B. Czerny, M. Bilicki +7
The nature of dark energy, driving the accelerated expansion of the Universe, is one of the most important issues in modern astrophysics. In order to understand this phenomenon, we…
Quasars as tracers of cosmic flows
J. Modzelewska, B. Czerny, M. Bilicki +6
Quasars, as the most luminous persistent sources in the Universe, have broad applications for cosmological studies. In particular, they can be employed to directly measure the expa…
SALT long-slit spectroscopy of CTS C30.10: two-component Mg II line
J. Modzelewska, B. Czerny, K. Hryniewicz +7
Quasars can be used as a complementary tool to SN Ia to probe the distribution of dark energy in the Universe by measuring the time delay of the emission line with respect to the c…
Towards equation of state of dark energy from quasar monitoring: Reverberation strategy
B. Czerny, K. Hryniewicz, I. Maity +3
High redshift quasars can be used to deduce the distribution of dark energy in the Universe, as a complementary tool to SN Ia. The method is based on determination of the size of t…
Dusty origin of the Broad Line Region in active galaxies
Bozena Czerny, Krzysztof Hryniewicz, Janusz Kaluzny +1
The most characteristic property of active galaxies, including quasars, are prominent broad emission lines. I will discuss an interesting possibility that dust is responsible for t…
The hypothesis of the dust origin of the Broad Line Region in Active Galactic Nuclei
B. Czerny, K. Hryniewicz
Strong broad emission lines are the most important signatures of active galactic nuclei. These lines allowed to discover the cosmological nature of quasars, and at present these li…
QPO in RE J1034+396: model constraints from observed trends
B. Czerny, P. Lachowicz, M. Dovciak +3
We analyze the time variability of the X-ray emission of RE J1034+396, an active galactic nucleus with the first firm detection of a quasi-periodic oscillations (QPO). Based on the…
Does Very Short Gamma Ray Bursts originate from Primordial Black Holes? Review
David B. Cline, Stan Otwinowski, Bozena Czerny +1
We present the state of current research of Very Short Gamma Ray Bursts (VSGRBs) from seven GRB detectors. We found that VSGRBs form distinct class of GRBs, which in our opinion, i…
The origin of the Broad Line Region in Active Galactic Nuclei
Bozena Czerny, Krzysztof Hryniewicz
Although broad emission lines are the most reliable signature of the nuclear activity of a galaxy and the location of the emitting material is well measured by the reverberation me…
Intermittent Activity of Jets in AGN
Aneta Siemiginowska, Bozena Czerny, Agnieszka Janiuk +5
Large scale X-ray jets that extend to >100 kpc distances from the host galaxy indicate the importance of jets interactions with the environment on many different physical scales. M…
Accretion Disk Model of Short-Timescale Intermittent Activity in Young Radio Sources
Bozena Czerny, Aneta Siemiginowska, Agnieszka Janiuk +2
We associate the existence of short-lived compact radio sources with the intermittent activity of the central engine caused by a radiation pressure instability within an accretion…