# 13th Serbian Conference on Spectral Line Shapes in AstrophysicsBelgrade, Serbia, August 23 - 27, 2021

Programme of 13th SCSLSA

Venue: Faculty of Mechanical Engeneering, Kraljice Marije 16, Belgrade, Serbia
Hall 513, 5th floor

Color coding: participants whose name is in blue color will attend the Conference online.

Talks timing:

• Invited talks last 30 minutes = 25 minutes presentation, 4 minutes Q/A and 1 minute to move on to the next talk
• Progress reports last 20 minutes = 16 minutes presentation, 3 minutes Q/A and 1 minute to move on to the next talk
• Poster presentations last 3 minutes, and 1 minute to move on to the next talk

# Monday, August 23, 2021

 14:30 - 15:30 Registration 15:30 - 16:00 Opening ceremony (G. Peach and L. Č. Popović) - VIDEO

## SPECTRAL LINE SHAPES FROM LABARATORY TO SPACE PLASMA

Chair: M. S. Dimitrijević

 16:00 - 16:30 Evgeny Stambulchik Spectral line merging in hydrogen-like species for diagnostic of laboratory and space plasmas - VIDEO 16:30 - 17:00 Joel Rosato Addressing the accuracy of the computer simulation method involved in Stark broadening calculations - VIDEO 17:00 - 17:30 Andrea Petric Obscured AGN at the Cosmic Noon - VIDEO 17:30 - 18:00 Gisella de Rosa The AGNSTORM 2 program: A detailed view of gas flows in Mrk817 - VIDEO 18:00 - 21:00 Welcome reception

# Tuesday, August 24, 2021

## SPECIAL SESSION DEDICATED TO VICTOR L. AFANASIEV: AGN Polarization

Chair: L. Č. Popović

 9:00 - 9:30 Serguei Dodonov Multi Object Methods for finding and study QSO's and Galaxies - VIDEO 9:30 - 10:00 Martin Roth 25 years of integral field spectroscopy - from the BTA to the VLT - VIDEO 10:00 - 10:30 Alexei Moiseev Observations of large-scale ionizing cones in Seyfert galaxies - VIDEO 10:30 - 10:50 Roman Uklein Universal reducer for small telescopes - VIDEO 10:50 - 11:10 Eugene Malygin The photometric reverberation mapping of active galaxies in SAO RAS - VIDEO 11:10 - 11:30 Coffee break

## SPECIAL SESSION DEDICATED TO VICTOR L. AFANASIEV: AGN Polarization

Chair: S. Dodonov

 11:30 - 12:00 Luka Č. Popović Polarization in broad emission lines of active galactic nuclei - VIDEO 12:00 - 12:30 Elena Shablovinskaya New capabilities of AGN polarimetry - VIDEO 12:30 - 13:00 Alexander Burenkov Monitoring of Seyfert 1 galaxies at the Special Astrophysical Observatory of the Russian Academy of Science - VIDEO 13:00 - 13:20 Đorđe Savić Broad emission line polarization of lensed quasars - VIDEO 13:20 - 13:40 Daria Kozlova Ionized-gas clouds in the 2MASX J013130.00-062550.8 galaxy 13:40 - 14:00 Alina Ikhsanova Gas and stars in the Teacup quasar - VIDEO 14:00 - 15:30 Lunch break

## SPECTRAL LINE PHENOMENA IN STARS

Chair: E. Stambulchik

 15:30 - 16:00 Friedrich Kupka Improvements to the short-characteristics method in 3D-RHDr simulations and some unsolved problems in spectral line shapes of a-type stars - VIDEO 16:00 - 16:30 Antonios Antoniou A new method for calculating column densities using GR model. An application in the case of C IV, N IV and N V spectral lines in the uv spectrum of the o star HD 149757 (zeta-OPH) - VIDEO 16:30 - 16:50 Rihab Aloui Stark broadening of Strontium ion Sr V spectral lines in hot white dwarf atmospheres - VIDEO 16:50 - 17:10 Rafik Hamdi Stark broadening effect in hot DA white dwarfs: ultraviolet lines of Fe V - VIDEO 17:10 - 17:30 Coffee break

## POSTER SESSION: SPECTRAL LINES IN ASTROPHYSICAL AND LABORATORY PLASMAS

Chair: A. Kovačević

 17:30 - 19:00 Poster session - VIDEO 3 min presentations

# Wednesday, August 25, 2021

## SURVEYS AND SPECTRAL LINE VARIABILITY IN EXTRAGALACTIC OBJECTS

Chair: D. Ilić

 9:00 - 9:30 Victor Oknyansky Changing Looks of the Nucleus of Seyfert Galaxy NGC 1566 in comparison with other CL AGNs - VIDEO 9:30 - 9:50 Pu Du Density Waves of Ionized Gas in Broad-line Regions of Active Galactic Nuclei - VIDEO 9:50 - 10:10 Sergey Kotov Quasars physical properties study based on the medium-band photometric survey - VIDEO 10:10 - 10:30 Iva Čvorović - Hajdinjak Deep learning of AGN spectral variability - VIDEO 10:30 - 10:50 Anastasia Yarovova Modeling of the peculiar nebula in the low-metallicity galaxy NGC 4068 10:50 - 11:10 Yu Yang Songsheng Geometric Distances of Quasars Measured by Spectroastrometry and Reverberation Mapping: Monte Carlo Simulations - VIDEO 11:10 - 11:40 Coffee break

## SPECTRAL LINE PHENOMENA IN QUASARS

Chair: S. Simić

 11:40 - 12:10 Paola Marziani The quasar main sequence: recent developments - VIDEO 12:10 - 12:40 Edi Bon Exploring the orientation of radio-loud AGN - VIDEO 12:40 - 13:00 Swayamtrupta Panda Flattening of the curve: Diagnostics of the H� and optical Fe+ emission - VIDEO 13:00 - 13:20 Tania Buendia Rios Statistical analysis of the AlIII?12500 line as a virial black hole mass estimator - VIDEO 13:20 - 13:40 Isidora Jankov Representation and characterization of broad-line AGN spectra based on manifold learning - VIDEO 13:40 - 15:30 Lunch break 15:30 - Conference excursion

# Thursday, August 26, 2021

## ATOMIC PARAMETERS AND SPECTRAL LINE SHAPES

Chair: R. Stamm

 9:00 - 9:30 Vladimir Srećković Rydberg atoms in astrophysics: new results - VIDEO 9:30 - 10:00 Mohammed Koubiti A prospective study on using machine learning from spectroscopic data for plasma parameter predictions - VIDEO 10:00 - 10:20 Lamia Abu El Maaty Energy levels, oscillator strengths and transition probabilities for the Ti II ion - VIDEO 10:20 - 10:40 Said Douis Statistical and dynamical properties in plasmas governed by H.G.K pseudo-potential 10:40 - 11:00 Ibtissem Hannachi Calculating the simultaneous effect of ion dynamics and oscillating electric fields on Stark profiles - VIDEO 11:00 - 11:30 Coffee break

## SPECTRAL LINE PHENOMENA IN EXTRAGALCTIC OBJECTS

Chair: A. Moiseev

 11:30 - 12:00 Alice Machado Radio-loud population a quasars at high redshift - VIDEO 12:00 - 12:30 Elena Dalla Bonta Black Hole masses from emission line widths - VIDEO 12:30 - 12:50 Miroslava Vukčević Spiral structure of the galactic disk and its influence on the rotational velocity curve - VIDEO 12:50 - 13:10 Jelena Kovačević Dojčinović The line profiles in AGNs type 1.8-2: unraveling the complex kinematical properties - VIDEO 13:10 - 13:30 Aleksandra Grokhovskaya Exploring the environment of active galaxies - VIDEO 13:30 - 15:00 Lunch break

## ATOMIC PARAMETERS AND SPECTRAL LINE SHAPES

Chair: V. Srećković

 15:00 - 15:30 Nikolay Bezuglov Expressions of "fast" and "slow" chameleon dressed states in autler-townes spectra of alkali-metal atoms - VIDEO 15:30 - 16:00 Nabil Ben Nessib Ab initio and semi-empirical atomic structure calculations. Applications to the 5s-6p transitions for the Mo II ion - VIDEO 16:00 - 16:20 Joel Rosato Modeling of collisional redistribution of line radiation by computer simulations - VIDEO 16:20 - 16:40 Magdalena Christova Stark broadening of B I spectral lines 16:40 - 17:00 Zlatko Majlinger Systematic trends among the Stark widths of Co II spectral lines - VIDEO 17:00 - 17:30 Coffee break

## SPECTRAL LINE PHENOMENA IN EXTRAGALCTIC OBJECTS

Chair: V. Okyansky

 17:30 - 18:00 Xinyu Dai New Quasar Microlensing Constraints on the Spin of High Redshift Quasars - VIDEO 18:00 - 18:20 Saloni Bhatiani Hunting for planet-mass objects in extragalactic systems - VIDEO 18:20 - 18:40 Jake Mitchell The Paschen broad line region and torus in Mrk509 - VIDEO 18:40 - 19:00 Hora Mishra Dramatic variability in a changing-look blazar, B2 1420+32 - VIDEO 19:00 - 19:30 Martin Gaskell The location and nature of the Fe II emitting region in active galactic nuclei - VIDEO 20:00 - CONFERENCE DINNER

# Friday, August 27, 2021

## SPECTRAL LINE RESEARCH: NEW FRONTIERS

Chair: E. Lyratzi

 09:30 - 10:00 Jian-Min Wang Accretion-modified Stars in Accretion Disks of Active Galactic Nuclei - VIDEO 10:00 - 10:30 Đorđe Spasojević Study of UV Ne II line shapes in the cathode sheath of an abnormal glow discharge - VIDEO 10:30 - 11:00 Anđelka Kovačević Spectral variability of active galactic nuclei in the context of large time-domain surveys - VIDEO 11:00 - 11:30 Coffee break

## SPECTRAL LINE VARIABILITY

Chair: P. Marziani

 11:30 - 11:50 Ting Feng Yi Detection of quasi-periodic oscillations in $\gamma$-ray and optical light curves of the BL Lac 4FGL J0650.7+2503 - VIDEO 11:50 - 12:10 Marzena Sniegowska Modelling changing-look (CL) AGN phenomenon using accretion disk instabilities - VIDEO 12:10 - 12:30 Dimitrios Stathopoulos On the variability of Lya, N V, Si IV and C IV BAL components of the BALQSO J131912.39+534720 - VIDEO 12:30 - 12:50 Martin Ochmann Mrk 926 reveals discrete line satellites during a drastic phase of decline 12:50 - 13:10 Daniel Kynoch Variability of the near-infrared coronal emission lines in the active galaxy NGC 5548 - VIDEO

 13:10 - 13:30 Official closing of the conference 13:30 - 15:00 Lunch break