Edi Bon | University of Belgrade (original) (raw)
Papers by Edi Bon
Monthly Notices of the Royal Astronomical Society
We study the disc emission component hidden in the single-peaked broad emission lines (BELs) of a... more We study the disc emission component hidden in the single-peaked broad emission lines (BELs) of active galactic nuclei. We compare the observed broad lines from a sample of 90 Seyfert 1 spectra taken from the Sloan Digital Sky Survey with simulated line profiles. We consider a two-component broad line region model where an accretion disc and a surrounding non-disc region with isotropic cloud velocities generate the simulated BEL profiles. The analysis is mainly based on the measurements of the full widths (at 10 per cent, 20 per cent and 30 per cent of the maximum intensity) and on the asymmetries of the line profiles. Comparing these parameters for the simulated and observed Hα broad lines, we found that the hidden disc emission may be present in BELs even if the characteristic of two-peaked-line profiles is absent. For the available sample of objects (Seyfert 1 galaxies with single-peaked BELs), our study indicates that, in the case of the hidden disc emission in single-peaked bro...
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We study the disk emission component hidden in the single-peaked Broad Emission Lines (BELs) of A... more We study the disk emission component hidden in the single-peaked Broad Emission Lines (BELs) of Active Galactic Nuclei (AGN). We compare the observed broad lines from a sample of 90 Seyfert 1 spectra taken from the Sloan Digital Sky Survey with simulated line profiles. We consider a two-component Broad Line Region (BLR) model where an accretion disk and a surrounding non-disk region with isotropic cloud velocities generate the simulated BEL profiles. The analysis is mainly based in measurements of the full widths (at 10%, 20% and 30% of the maximum intensity) and of the asymmetries of the line profiles. Comparing these parameters for the simulated and observed H$\alpha$ broad lines, we {found} that the hidden disk emission {may} be present in BELs even if the characteristic {of two peaked line profiles is} absent. For the available sample of objects (Seyfert 1 galaxies with single-peaked BELs), our study indicates that, {in the case of the hidden disk emission in single peaked broad...
Profiles of broad emission lines (BELs) in active galactic nuclei (AGN) are very complex indicati... more Profiles of broad emission lines (BELs) in active galactic nuclei (AGN) are very complex indicating a complex Broad Line Region (BLR) geometry. We discuss several specific broad line profiles in order to constrain possible geometries for the BLR using BELs. Especially, we discuss the possibility that a disk emission is present in the BEL profiles.
Here we discuss possibility that a disk emission is present in the Broad Emission Lines (BELs) of... more Here we discuss possibility that a disk emission is present in the Broad Emission Lines (BELs) of Active Galactic Nuclei (AGN), even if they have only broad single-peaked lines. We introduce a two-component model assuming that two regions contribute to the BELs: a disk emission and an emission region with isotropic velocity field. Then we simulate the line profiles and compare them with observed ones. We found that the disk emission may be present in the broad single peaked lines, but the disk contribution tends to be smaller than 70% of the total line flux and the disk inclination seems to be smaller than 20°.
Proceedings of the 13th International Conference on Computer Systems and Technologies - CompSysTech '12, 2012
Considering the idea that figures in the central icon of the Mithraic religion, with scene of tau... more Considering the idea that figures in the central icon of the Mithraic religion, with scene of tauroctony (bull slaying), represent equatorial constellations in the times in which the spring equinox was in between of Taurus and Aries (Ulansey, 1989) , it was hard to explain why some equatorial constellations were not included in the Mithraic icons (constellations of Orion and
The Astrophysical Journal, 2012
New Astronomy Reviews, 2009
New Astronomy Reviews, 2009
Journal of Physics: Conference Series, 2010
ABSTRACT We studied the disk emission component hidden in the single-peaked broad emission lines ... more ABSTRACT We studied the disk emission component hidden in the single-peaked broad emission lines (BELs) of active galactic nuclei (AGN) using a two-component model. We assumed that the broad lines are formed in an accretion disk plus a surrounding non-disk region, with isotropic cloud velocities. To compare simulated line profiles with observed ones we measured the full widths (at 10 per cent, 20 per cent and 30 per cent of the maximum intensity). We found that the hidden disk emission may be present in BELs even if the characteristic of two-peaked-line profiles is absent. We found that in the case of the hidden disk emission in single-peaked broad-line profiles, the disk inclination tends to be small and that the contribution of the disk emission to the total flux should be smaller than the contribution of the surrounding region.
Here we will present some spectroscopic methods for emission gas research in the emission line re... more Here we will present some spectroscopic methods for emission gas research in the emission line region of Active Galactic Nuclei (AGNs): (1) We will demonstrate the possibility to use the Boltzmann-plot method to estimate the physical conditions in the broad line regions (BLRs) (2) We will discuss the applicability of so called ``Gaussian method'' for spectral line shape investigation of
Publications de l' …, 2009
Publications de l' …, 2003
На многим хришћанским иконама налазе се мотиви који упућују на астрономско порекло (на пример ико... more На многим хришћанским иконама налазе се мотиви који упућују на астрономско порекло (на пример иконографија светог Илије, прикази Архангела Михајла,
описи Армагедона и Апокалипсе и слично). На основу мотива који су присутни у иконографији св. Илије, као и митова који су везани за њега, као што је помињање
жртвовања бика, може се претпоставити да овај мит потиче из времена од четвртог до другог миленијума п.н.е., и да мотив ватре с неба вероватно указје на упад комете или неког другог објекта на Земљу, који је у том периоду изазвао катастрофу.
Monthly Notices of the Royal Astronomical Society
We study the disc emission component hidden in the single-peaked broad emission lines (BELs) of a... more We study the disc emission component hidden in the single-peaked broad emission lines (BELs) of active galactic nuclei. We compare the observed broad lines from a sample of 90 Seyfert 1 spectra taken from the Sloan Digital Sky Survey with simulated line profiles. We consider a two-component broad line region model where an accretion disc and a surrounding non-disc region with isotropic cloud velocities generate the simulated BEL profiles. The analysis is mainly based on the measurements of the full widths (at 10 per cent, 20 per cent and 30 per cent of the maximum intensity) and on the asymmetries of the line profiles. Comparing these parameters for the simulated and observed Hα broad lines, we found that the hidden disc emission may be present in BELs even if the characteristic of two-peaked-line profiles is absent. For the available sample of objects (Seyfert 1 galaxies with single-peaked BELs), our study indicates that, in the case of the hidden disc emission in single-peaked bro...
We study the disk emission component hidden in the single-peaked Broad Emission Lines (BELs) of A... more We study the disk emission component hidden in the single-peaked Broad Emission Lines (BELs) of Active Galactic Nuclei (AGN). We compare the observed broad lines from a sample of 90 Seyfert 1 spectra taken from the Sloan Digital Sky Survey with simulated line profiles. We consider a two-component Broad Line Region (BLR) model where an accretion disk and a surrounding non-disk region with isotropic cloud velocities generate the simulated BEL profiles. The analysis is mainly based in measurements of the full widths (at 10%, 20% and 30% of the maximum intensity) and of the asymmetries of the line profiles. Comparing these parameters for the simulated and observed H$\alpha$ broad lines, we {found} that the hidden disk emission {may} be present in BELs even if the characteristic {of two peaked line profiles is} absent. For the available sample of objects (Seyfert 1 galaxies with single-peaked BELs), our study indicates that, {in the case of the hidden disk emission in single peaked broad...
Profiles of broad emission lines (BELs) in active galactic nuclei (AGN) are very complex indicati... more Profiles of broad emission lines (BELs) in active galactic nuclei (AGN) are very complex indicating a complex Broad Line Region (BLR) geometry. We discuss several specific broad line profiles in order to constrain possible geometries for the BLR using BELs. Especially, we discuss the possibility that a disk emission is present in the BEL profiles.
Here we discuss possibility that a disk emission is present in the Broad Emission Lines (BELs) of... more Here we discuss possibility that a disk emission is present in the Broad Emission Lines (BELs) of Active Galactic Nuclei (AGN), even if they have only broad single-peaked lines. We introduce a two-component model assuming that two regions contribute to the BELs: a disk emission and an emission region with isotropic velocity field. Then we simulate the line profiles and compare them with observed ones. We found that the disk emission may be present in the broad single peaked lines, but the disk contribution tends to be smaller than 70% of the total line flux and the disk inclination seems to be smaller than 20°.
Proceedings of the 13th International Conference on Computer Systems and Technologies - CompSysTech '12, 2012
Considering the idea that figures in the central icon of the Mithraic religion, with scene of tau... more Considering the idea that figures in the central icon of the Mithraic religion, with scene of tauroctony (bull slaying), represent equatorial constellations in the times in which the spring equinox was in between of Taurus and Aries (Ulansey, 1989) , it was hard to explain why some equatorial constellations were not included in the Mithraic icons (constellations of Orion and
The Astrophysical Journal, 2012
New Astronomy Reviews, 2009
New Astronomy Reviews, 2009
Journal of Physics: Conference Series, 2010
ABSTRACT We studied the disk emission component hidden in the single-peaked broad emission lines ... more ABSTRACT We studied the disk emission component hidden in the single-peaked broad emission lines (BELs) of active galactic nuclei (AGN) using a two-component model. We assumed that the broad lines are formed in an accretion disk plus a surrounding non-disk region, with isotropic cloud velocities. To compare simulated line profiles with observed ones we measured the full widths (at 10 per cent, 20 per cent and 30 per cent of the maximum intensity). We found that the hidden disk emission may be present in BELs even if the characteristic of two-peaked-line profiles is absent. We found that in the case of the hidden disk emission in single-peaked broad-line profiles, the disk inclination tends to be small and that the contribution of the disk emission to the total flux should be smaller than the contribution of the surrounding region.
Here we will present some spectroscopic methods for emission gas research in the emission line re... more Here we will present some spectroscopic methods for emission gas research in the emission line region of Active Galactic Nuclei (AGNs): (1) We will demonstrate the possibility to use the Boltzmann-plot method to estimate the physical conditions in the broad line regions (BLRs) (2) We will discuss the applicability of so called ``Gaussian method'' for spectral line shape investigation of
Publications de l' …, 2009
Publications de l' …, 2003
На многим хришћанским иконама налазе се мотиви који упућују на астрономско порекло (на пример ико... more На многим хришћанским иконама налазе се мотиви који упућују на астрономско порекло (на пример иконографија светог Илије, прикази Архангела Михајла,
описи Армагедона и Апокалипсе и слично). На основу мотива који су присутни у иконографији св. Илије, као и митова који су везани за њега, као што је помињање
жртвовања бика, може се претпоставити да овај мит потиче из времена од четвртог до другог миленијума п.н.е., и да мотив ватре с неба вероватно указје на упад комете или неког другог објекта на Земљу, који је у том периоду изазвао катастрофу.