Astrophysicist focused on optical and infrared studies of active galactic nuclei and nuclear transients, with particular expertise in spectroscopy, spectrophotometry, long-baseline variability and dust reverberation. I lead optical monitoring programmes and develop quantitative analysis workflows that connect continuum and line variability to broad-line-region visibility, circumnuclear dust structure and changes in the accretion state. My research combines ZTF, WISE/NEOWISE and large spectroscopic surveys with targeted telescope observations; X-ray, radio and H I measurements are used as complementary constraints on obscuration and host-galaxy context.
Open to international research collaborations and remote roles in scientific AI training and evaluation, astrophysics data analysis, and scientific computing.
Optical and mid-infrared time-domain data are used to recover characteristic response timescales, trace colour and flux evolution, and constrain the geometry and thermal response of circumnuclear dust. Applications include phase-resolved WISE diagnostics, reverberation analysis and multi-component dust-echo modelling of obscured nuclear transients.
Spectral analyses separate stellar, AGN-continuum and Fe II contributions before modelling narrow- and broad-line emission. Line-profile and diagnostic measurements are used to constrain ionisation, obscuration and BLR visibility, with weak components tested through alternative model families, empirical nulls and injection–recovery experiments.
Optical and infrared results are interpreted alongside complementary UV, X-ray, radio and H I measurements from archival surveys and the literature. The emphasis is on cross-survey consistency, aperture and calibration systematics, extinction and absorption, and a clear separation between direct measurements and model-dependent inference.
I quantify the large-scale context of active nuclei using calibrated imaging, deprojected structural measurements, Fourier modes, stellar-mass estimates and global H I profiles. This allows nuclear variability and obscuration to be interpreted alongside bars, disc asymmetries, atomic-gas content and the low-density environments of isolated galaxies.
For scientific AI training and evaluation, I contribute domain-level physics and astronomy expertise: designing technically demanding tasks, constructing reference solutions and scoring criteria, auditing model-generated calculations, code and scientific arguments, and testing whether conclusions remain valid under alternative assumptions and independent checks. The work focuses on rigorous verification of scientific reasoning, quantitative consistency, methodological soundness and evidential support.
Python-based analysis pipelines, Monte Carlo and bootstrap uncertainty estimation, residual diagnostics, alternative model families, injection–recovery experiments, and cross-checks against independent observations.
Domain expertise translated into well-specified scientific tasks, reference reasoning and evaluation criteria; assessment of AI-generated code and quantitative arguments for internal consistency, evidence use, model assumptions and physical validity; and systematic analysis of failure modes.
Relevant professional areas: Scientific AI Trainer · AI Evaluator · Physics/Astronomy Domain Expert · Benchmark Design · Scientific Data Analysis
Department of Extragalactic Astronomy and Astroinformatics. Research on active galactic nuclei, optical/infrared spectroscopy and photometry, variability, reverberation, and isolated-galaxy context.
International Centre for Astronomical, Medical and Ecological Research. Concurrent research appointment focused on spectroscopy, photometric monitoring and collaborative observational studies.
Operation of Zeiss-600 and Zeiss-2000 telescopes; photometric, spectrophotometric and polarimetric observations; observational planning and data processing.
Principal Investigator of programmes on isolated galaxies and AGN monitoring. Competitive observing time awarded for semesters 2025A, 2025B and 2026A.
Prepared and submitted observing proposals to XMM-Newton and ESO facilities; decisions pending. Proposal work included broadband spectral simulations and exposure-feasibility calculations for an XMM-Newton/NuSTAR programme.
Finding charts and comparison-star sequences for optical AGN monitoring, distributed as an interactive GitHub Pages resource and archived on Zenodo.
ORCID: 0009-0009-4307-0627
GitHub: izviekova-blip
Dissertation on spectrophotometric analysis of selected isolated active galactic nuclei. Defence planned before summer 2027.
Taras Shevchenko National University of Kyiv, Faculty of Physics.
Taras Shevchenko National University of Kyiv, Faculty of Physics.
Peer-reviewed journal articles and proceedings. Preprints and manuscripts are listed separately below.
O. V. Kompaniiets, I. B. Vavilova, Y. V. Vasylkivskyi, O. O. Konovalenko, O. S. Pastoven, I. O. Izviekova, et al. · Astronomy & Astrophysics 710, A11
doi:10.1051/0004-6361/202558597 ↗O. Sergijenko, I. B. Vavilova, I. O. Izviekova, D. R. Karakuts, O. M. Kukhar · Space Science and Technology, 6, 94–105
doi:10.15407/knit2025.06.094 ↗M. Maskoliūnas, Ł. Wyrzykowski, K. Howil, et al., including I. Izviekova · Acta Astronomica 74(2), 77–111
doi:10.32023/0001-5237/74.2.1 ↗V. G. Godunova, A. O. Simon, Y. S. Markus, et al., including I. O. Izviekova · Contributions of the Astronomical Observatory Skalnaté Pleso 54(2), 205–212
doi:10.31577/caosp.2024.54.2.205 ↗O. S. Pastoven, O. V. Kompaniiets, I. B. Vavilova, I. O. Izviekova · Space Science and Technology 30(6), 67–83
doi:10.15407/knit2024.06.067 ↗T. Kamiński, M. Schmidt, M. Hajduk, A. Kiljan, I. Izviekova, A. Frankowski · Astronomy & Astrophysics 672, A196
doi:10.1051/0004-6361/202244497 ↗O. V. Kompaniiets, Iu. V. Babyk, A. A. Vasylenko, I. O. Izviekova, I. B. Vavilova · Proceedings of the IAU, Symposium S362, 100–104
doi:10.1017/S1743921322001624 ↗I. O. Izviekova, V. A. Ponomarenko, N. G. Pulatova, V. V. Vasylenko, A. O. Simon · Kinematics and Physics of Celestial Bodies 38(6), 328–339
doi:10.3103/S0884591322060034 ↗V. Ponomarenko, A. Simon, V. Vasylenko, I. Izviekova, O. Baransky · Bulletin of Taras Shevchenko National University of Kyiv. Astronomy 59, 42–48
doi:10.17721/BTSNUA.2019.59.42-48 ↗T. Kato, E. P. Pavlenko, N. V. Pit, et al., including I. O. Izviekova · Publications of the Astronomical Society of Japan 71(2), L1
doi:10.1093/pasj/psz007 ↗A. O. Simon, E. P. Pavlenko, S. Yu. Shugarov, V. V. Vasylenko, I. O. Izviekova, et al. · Contributions of the Astronomical Observatory Skalnaté Pleso 49(2), 420–423
No DOI locatedV. G. Godunova, A. O. Simon, V. M. Reshetnyk, I. O. Izviekova, et al. · Contributions of the Astronomical Observatory Skalnaté Pleso 49(2), 358–362
No DOI locatedI. O. Izviekova, I. B. Vavilova, O. V. Kompaniiets, O. Zamora, R. Clavero — The 2MIG isolated AGNs. 4. Linking hot-dust reverberation to spectroscopically predicted BLR scales in IC 5287 and Mrk 845. arXiv:2609.35306 ↗
I. O. Izviekova, O. V. Kompaniiets, I. B. Vavilova — Revealing a multi-zone circumnuclear dust response in UGC 11487 through phase-resolved WISE W1–W2 diagnostics. arXiv:2607.17815 ↗
I. B. Vavilova, A. M. Dmytrenko, D. V. Dobrycheva, et al., including I. O. Izviekova — Milky Way Near Twins (MWNeTs). I. A Hierarchical Framework for Identifying the Evolutionary Counterparts of the Milky Way. arXiv:2607.08336 ↗
I. O. Izviekova, I. B. Vavilova, O. V. Kompaniiets, O. Zamora, R. Clavero — The 2MIG isolated AGNs. 3. Optical–IR variability and dust reverberation in the NLSy1 galaxies Mrk 42 and Mrk 493. arXiv:2605.06517 ↗
For research collaborations, scientific AI training and evaluation, astrophysics data analysis, or scientific computing projects.