Abdikamalov Askar Baxtiyarovich

Askar Bakhtiyarovich Abdikamalov was born in Nukus, Uzbekistan in 1992. He earned his Bachelor's and Master's degrees in Mechanics and Mathematics from the National University of Uzbekistan. In 2020, he completed his Ph.D. in Physics at Fudan University, China.

His academic career began at the Ulugh Beg Astronomical Institute in Tashkent, where he held various research positions—from Leading Engineer to Senior and then Leading Research Fellow. Since 2020, he has also been serving as a Postdoctoral Research Fellow at the Department of Physics at Fudan University.

His research focuses on:

1. Modeling the reflection spectra from black hole accretion disks
2. Studying optical properties of black holes
3. Developing numerical methods for astrophysical applications

1. Jiachen Jiang, Askar B. Abdikamalov, Cosimo Bambi, Christopher S. Reynolds, Black Hole

Spin Measurements Based on a Thin Disc Model with Finite Thickness I. An example study

of MCG-06-30-15, MNRAS, Volume 514, Issue 3, August 2022, Pages 3246–3259, e-Print:

2205.06696 [astro-ph.HE].

2. Askar B. Abdikamalov, Dimitry Ayzenberg, Cosimo Bambi, Honghui Liu, Ashutosh

Tripathi, A reflection model with a radial disk density profile, Astrophys.J. 923 (2021) 2,

175, arxiV:2108.00375 [astro-ph.HE].

3. Zuobin Zhang, Honghui Liu, Askar B. Abdikamalov, Dimitry Ayzenberg, Cosimo Bambi,

Menglei Zhou, Testing the Kerr black hole hypothesis with GRS 1716-249 by combining

the continuum-fitting and the iron-line methods, Astrophys.J. 924 (2022) 2, 72,

arXiv:2106.03086 [astro-ph.HE].

4. Shafqat Riaz, Askar B. Abdikamalov, Dimitry Ayzenberg, Cosimo Bambi, Haiyang Wang,

Zhibo Yu, Reflection spectra of accretion disks illuminated by disk-like coronae,

Astrophys.J. 925 (2022) 1, 51, arXiv:2012.07469 [astro-ph.HE]

5. Zhibo Yu, Qunfeng Jiang, Askar B. Abdikamalov, Dimitry Ayzenberg, Cosimo Bambi,

Honghui Liu, Sourabh Nampalliwar, Ashutosh Tripathi, Constraining the Konoplya-

Rezzolla-Zhidenko deformation parameters II: limits from stellar-mass black hole X-ray

data, Phys.Rev.D 104 (2021) 8, 084035, arXiv:2106.11658 [astro-ph.HE].

6. Askar B. Abdikamalov, Dimitry Ayzenberg, Cosimo Bambi, Sourabh Nampalliwar,

Ashutosh Tripathi, Constraining the KRZ deformation parameters I: limits from

supermassive black hole X-ray data, Phys. Rev. D 104, 024058 (2021), arXiv:2104.04183

[astro-ph.HE].

7. Ashutosh Tripathi, Biao Zhou, Askar B. Abdikamalov, Dimitry Ayzenberg, Cosimo Bambi,

Constraints on Einstein-Maxwell dilaton-axion gravity from X-ray reflection spectroscopy,

JCAP 2107:002 (2021), arXiv:2103.07593 [astro-ph.HE].

8. Askar B. Abdikamalov, Dimitry Ayzenberg, Cosimo Bambi, Honghui Liu, Impact of the

disk thickness on X-ray reflection spectroscopy measurements, Ashutosh Tripathi,

Astrophys.J. 913: 129 (2021),arXiv:2102.04695 [astro-ph.HE].

9. Askar B. Abdikamalov, Dimitry Ayzenberg, Cosimo Bambi, Honghui Liu, Yuexin Zhang,

Implementation of a radial disk ionization profile in the RELXILL_NK model, Phys. Rev.

D 103, 103023 (2021), arXiv:2101.10100 [astro-ph.HE].

10. Ashutosh Tripathi, Yuexin Zhang, Askar B. Abdikamalov, Dimitry Ayzenberg, Cosimo

Bambi, Jiachen Jiang, Honghui Liu, Menglei Zhou, Testing General Relativity with

NuSTAR data of Galactic Black Holes, Astrophys.J. 913: 79 (2021), arXiv:2012.10669

[astro-ph.HE].

11. Zuobin Zhang, Honghui Liu, Askar B. Abdikamalov, Dimitry Ayzenberg, Cosimo Bambi,

Menglei Zhou, Probing the near-horizon region of Cygnus X-1 with Suzaku and NuSTAR,

Phys. Rev. D 103, 024055 (2021), arXiv:2012.01112 [astro-ph.HE].

12. Ashutosh Tripathi, Askar B. Abdikamalov, Dimitry Ayzenberg, Cosimo Bambi, Victoria

Grinberg, Menglei Zhou, Testing the Kerr Black Hole Hypothesis with GX 339-4 by a

combined analysis of its thermal spectrum and reflection features, Astrophys.J. 907: 31

(2021), arXiv:2010.13474 [astro-ph.HE].

13. Ashutosh Tripathi, Biao Zhou, Askar B. Abdikamalov, Dimitry Ayzenberg, Cosimo Bambi,

Sourabh Nampalliwar, Testing the Keplerian disk hypothesis using X-ray reflection

spectroscopy, Phys. Rev. D 102, 103009 (2020), arXiv:2008.01934 [astro-ph.HE].

14. Biao Zhou, Askar B. Abdikamalov, Dimitry Ayzenberg, Cosimo Bambi, Sourabh

Nampalliwar, Ashutosh Tripathi, Shining X-rays on asymptotically safe quantum gravity,

JCAP 2101:047 (2021), arXiv:2005.12958 [astro-ph.HE].

15. Jiachen Zhu, Askar B. Abdikamalov, Dimitry Ayzenberg, Mustapha Azreg-Ainou, Cosimo

Bambi, Mubasher Jamil, Sourabh Nampalliwar, Ashutosh Tripathi, Menglei Zhou, X-ray

reflection spectroscopy with Kaluza-Klein black holes, Eur. Phys. J. C (2020) 80:622,

arXiv:2005.00184 [gr-qc].

16. Menglei Zhou, Askar B. Abdikamalov, Dimitry Ayzenberg, Cosimo Bambi, Victoria

Grinberg, Ashutosh Tripathi, Thermal spectra of thin accretion disks of finite thickness

around Kerr black holes, Mon. Not. Roy. Astron. Soc. 496, 497-503 (2020),

arXiv:2004.12589 [astro-ph.HE].

17. Honghui Liu, Haiyang Wang, Askar B. Abdikamalov, Dimitry Ayzenberg, Cosimo Bambi,

Reflection features in the X-ray spectrum of Fairall 9 and implications for tests of general

relativity, Astrophys.J. 896: 160 (2020), arXiv:2004.11542 [gr-qc].

18. Askar B. Abdikamalov, Dimitry Ayzenberg, Cosimo Bambi, Thomas Dauser, Javier A.

Garcia, Sourabh Nampalliwar, Ashutosh Tripathi, Menglei Zhou, Testing the Kerr black

hole hypothesis using X-ray reflection spectroscopy and a thin disk model with finite

thickness, Astrophys.J. 899: 80 (2020), arXiv:2003.09663 [astro-ph.HE].

19. Ashutosh Tripathi, Menglei Zhou, Askar B. Abdikamalov, Dimitry Ayzenberg, Cosimo

Bambi, Lijun Gou, Victoria Grinberg, Honghui Liu, James F. Steiner, Testing general

relativity with the stellar-mass black hole in LMC X-1 using the continuum-fitting method,

Astrophys.J. 897: 84 (2020), arXiv:2001.08391 [gr-qc].

20. A. Tripathi, B. Zhou, A. B. Abdikamalov, D. Ayzenberg, C. Bambi, Search for traversable

wormholes in active galactic nuclei using X-ray data, Phys. Rev. D 101, 064030 (2020),

arXiv:1912.03868 [gr-qc].

21. Y. Zhang, A. B. Abdikamalov, D. Ayzenberg, C. Bambi, S. Nampalliwar, Tests of the Kerr

hypothesis with GRS 1915+105 using different RELXILL flavors, Astrophys. J. 884, 147 (2019), e-Print: arXiv:1907.03084 [gr-qc].

RELXILL_NK: A Black Hole Relativistic Reflection Model for Testing General Relativity – MDPI Proc. 17 (2019)

Testing General Relativity with Supermassive Black Holes using X-ray Reflection Spectroscopy – MDPI Proc. 17 (2019)

RELXILL_NK: a relativistic reflection model for testing Einstein's gravity – Universe 4 (2018)