1. Abbott, B. P., Abbott, R., Abbott, T. D., Abernathy, M. R., Acernese, F., Ackley, K., …& Zweizig, J. (2016 ). Observation of Gravitational Waves from a Binary Black Hole Merger. Phys. Rev. Lett,116, 061102.
2. Abbott, B. P., Abbott, R., Abbott, T. D., Abernathy, M. R., Acernese, F., Ackley, K., …& Zweizig, J. ( 2016). GW151226: Observation of Gravitational Waves from a 22-Solar-Mass Binary Black Hole Coalescence. Phys. Rev. Lett,116, 241103
3. Abbott, B. P., Abbott, R., Abbott, T. D., Acernese, F., Ackley, K., Adams, C., …& Zweizig, J. (2017). GW179104:Observation of a 50-Solar-Mass Binary Black Hole Coalescence at Redshift 0.2. Phys. Rev. Lett,118, 221101
4. Einstein, A . (1916 ). Naeherungsweise Integration der Feldgleishungen der Gravitation. Preuss. Acad. Wiss. Berlin, 688.
5. Abbott, B. P., Abbott, R., Abbott, T. D., Acernese, F., Ackley, K., Adams, C., …& Zweizig, J. (2017). GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral. Phys. Rev. Lett,119, 161101
6. Chirenti, C. & Rezzolla, L.. (2016). Did GW150914 Produce a Rotating Gravastar ? Phys. Rev. D94, 084016
7. Cardoso, V. & Pani, P.. (2017). Tests for the Existence of Horizons Through Gravitational Wave Echoes. 〔gr-qc〕 arXiv:1709.01525 vol 1.
8. Glampedakis, K. & Pappas, G. (2018). How Well Can Ultracompact Bodies Imitate Black Hole Ringdowns? Phys. Rev. D97, 041502
9. Schödel, R., Ott, T., Genzel, R., Hofmann, R., Lehnert, M., Eckart, A., ….& Menten, K. M..(2002). A Star in a 15.2-Year Orbit around the Supermassive Black Hole at the Center of the Milky Way.Nature 419 694–6 [doi: 10.1038/nature01121]
10. Gehz, A., Duchene, G., & Mathews, K. ( 2003).The first Measurement of Spectral Lines in a Short-Period Star Bound to the Galaxy’s Central Black Hole. Astrophys. J. Lett, 586,127
11. Ghez, A. M. , Salim, S. , Hornstein, S. D. , Tanner, A. , Lu, J. R., Morris, M. , …& Duchêne, G.( 2005). Stella Orbits around the Galactic Center Black Hole. Astrophys. J., 620, 744
12. Eisenhauer, F., Genzel, R., Alexander, T., Abuter, R., Paumard, T., Ott, T., …& Zucker, S. (2005). SINHONIA in the Galactic Center: Young Stars and Infrared Flares in the Central Light-Month. Astrophys. J., 628, 246
13. Gillessen S, Eisenhauer F, Fritz T K, Bartko, H., Dodds-Eden, K., Pfuhl, O.,…& Genzel, R.. (2009). The Orbit of the Star S2 around SgrA* from Very Large Telescope and Keck Data. Astrophys. J. Lett., 707, 114
14. Gillessen, S., Eisenhauer. F,, Trippe, S., Alexander, T., Genzel, R., Martins, F., & Otto, T. (2009 ) Monitoring Stellar Orbits around the Massive Black Hole in the Galactic Center. Astrophys. J., 692,1075
15. Gillessen1, S., Plewa1, P. M., Eisenhauer, F., Sari, R., Waisberg, I., Habibi, M., & Genzel1, R. (2017) .An update on monitoring stellar orbits in the Galactic center, Astrophys. J., 837,30
16. Oya, H.(2019) Detection of Decameter Radio Wave Pulses from the Center Part of Our Galaxy Suggesting Sources at Rotating Super Massive Black Hole Binary, TERRAPUB, e-Lab, http://hdl.handle.net/10097/00126480
17. Oya, H.(2022). Interpretation of time-varying radio emissions of SgrA* observed by 1.3 millimeter wavelength VLBI with black hole binary concluded by decameter radio wave pulse observations, Eart & Envi Scie Res & Rev. 5(4): 185-216.
18. Fish,V.,L.,Doeleman,S.,Beaudoin,C.,Blundell,R.,Bolin,D.E.,Bower,G.C., …& Friberg,P. (2011). The 1.3 mm Wavelength VLBI of Sagittarius A*:Detection of Time-Variable Emission on Event Horizon Scales, Astrophys. Journ. Lett., 727 ,L36
19. Mehta, A., Buonanno, A., Gair, J., Miller, C., Deboer, R.,Wiescher, M.,…& Farag, E. ( 2021). Measurement of Intermediate Mass Black Hole Binaries Including the Mass Gap in the Upcoming LIGO-Virgo Observations. arXiv:2105.06366v1[gr-qc]
20. Arzoumanian, Z., Brazier, A., Burke-Spolaor, S., Chamberlin, S. J.,Chatterjee, S., Cordes, J. …& Zhu,W. W.. (2014). Gravitational Waves from Individual Supermassive Black Hole Binaries in Circular Orbits: Limits from the North American Nanohertz Observatory for Gravitational Waves. Astrophys. J. 794 ,141
21. Akiyama, K.; Alberdi, A., Alef,W., Algaba, J.C., Anantua, R.,Asada, K., … & Zebaros, M.(2022). First Sagittarius A* Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole in the Center of the Milky Way, Astrophys. J. Lett, 930; L12
22. Akiyama, K.; Alberdi, A., Alef,W., Algaba, J.C., Anantua, R.,Asada, K., … & Wouterloot, J.G.A. (2022). First Sagittarius A* Event Horizon Telescope Results. II. EHT and Multiwavelength Observations, Data Processing, and Calibration, Astrophys. J. Lett. 930; L13
23. Akiyama, K.; Alberdi, A., Alef,W., Algaba, J.C., Anantua, R.,Asada, K., … & Zhao, S.-S. (2022). First Sagittarius A* Event Horizon Telescope Results. III. Imaging of the Galactic Center Supermassive Black Hole, Astrophys. J. Lett. (2022). 930; L14
24. Akiyama, K.; Alberdi, A., Alef,W., Algaba, J.C., Anantua, R.,Asada, K., … & Chang, D. O. (2022). First Sagittarius A* Event Horizon Telescope Results. IV. Variability, Morphology, and Black Hole Mass, Astrophys. J. Lett. 930; L15
25. Akiyama, K.; Alberdi, A., Alef,W., Algaba, J.C., Anantua, R.,Asada, K., … & White,C. (2022). First Sagittarius A* Event Horizon Telescope Results. V. Testing Astrophysical Models of the Galactic Center Black Hole, Astrophys. J. Lett., 930; L16
26. Akiyama, K.; Alberdi, A., Alef,W., Algaba, J.C., Anantua, R.,Asada, K., … & Zhao, S.-S. (2022).First Sagittarius A* Event Horizon Telescope Results. VI. Testing the Black Hole Metric, Astrophys. J. Lett., 930; L17,
27. Miyoshi, M. Kato, Y.. & Makino, J. (2022). The Jet and Resolved Features of the Central Supermassive Black Hole of M87 Observed with the Event Horizon Telescope (EHT) Astrophys. J., 933,36
28. Akiyama,K., Alberdi, A. Alef,W., Asada, K., Azulay,R , Baczko,A.-K.,...& Ziurys, L. (2019). First M87 Event Horizon Telescope Results. I: The Shadow of the Supermassive Black Hole, Astrophys. J. Lett., 875,L1
29. Akiyama,K., Alberdi, A. Alef,W., Asada, K., Azulay,R , Baczko,A.-K.,...& Ziurys, L. (2019). First M87 Event Horizon Telescope Results. II: Array and Instrumentation, Astrophys. J. Lett., 875,L2
30. Akiyama,K., Alberdi, A. Alef,W., Asada, K., Azulay,R , Baczko,A.-K.,…. & Yamaguti, P. (2019). First M87 Event Horizon Telescope Results. III. Data Processing and Calibration, Astrophys. J. Lett., 875, L3
31. Akiyama,K., Alberdi, A. Alef,W., Asada, K., Azulay,R , Baczko,A.-K.,…. & Yamaguti, P. (2019).First M87 Event Horizon Telescope Results. IV.:,Imaging the Central Supermassive Black Hole, Astrophys. J. Lett.875:L4
32. Akiyama,K., Alberdi, A. Alef,W., Asada, K., Azulay,R , Baczko,A.-K.,…& Zhang, S. (2019). First M87 Event Horizon Telescope Results. V.: Physical Origin of the Asymmetric Ring , Astrophys J. Lett., 875,L5
33. Akiyama,K., Alberdi, A. Alef,W., Asada, K., Azulay,R , Baczko,A.-K.,…. & Yamaguti, P. (2019).First M87 Event Horizon Telescope Results. VI.;The Shadow and Mass of the Central Black Hole., Astrophys. J. Lett., 875:,L6-ab1141
34. Fish,V,L.,Johnson,M.D.,Doeleman1,S.S., Broderick,A,E., Psaltis, D., Lu.R.-S., …& Ziurys,L.M.(2016). Persistent asymmetric structure of Sagittarius A* on event horizon scales, Astrophys, J., 820,90
35. McInnes, B. & Ong, Y. C., (2015). A Note on Physical Mass and the Thermodynamics of AdS-Kerr Black Holes, arXiv:1506.01248v2[gr-qc] 8.
36. Chew, X. Y. & Ong, Y. C.(2020). Interior Volume of Kerr-AdS Black Holes. Phys. Rev. D101, 104026
37. Pandya, A. & Pretorius, F. (2020). The Rotating Black Hole Iinterior: Insights from gravitational collapse in AdS3 spacetime. Phys. Rev. D 101, 104026
38. Einstein A (1922) The Meaning of Relativity, Lecture Note , Princeton University Press.
39. Kokkotas, K. D. & Schmidt, B. G. (1999). Quasi-Normal Modes of Stars and Black Holes , Living Reviews in Relativity volume 2, Article number: 2
40. Emanuele ,B., Cardoso,V., Starlinets,O .(2009). Qusinormal Modes of Black Holes and Black Branes., Class. Quantum. Grav.. 26, 163001
41. Epstein, R . & Wagoner, R.. V. (1975). Post-Newtonian Generation of Gravitational Waves., Astrophys. J., 197, 717
42. Blanchet, L. (1996). Energy Losses by Gravitational Radiation in Inspiraling Compact Binaries to 5/2 Post-Newtonian Order. Phys. Rev. D 54, 1417
43. Thorne, K. S. & Campolattaro, A. (1967). Non-Radial Pulsation of General-Relativistic Stellar Models. I. Analytic Analysis for L >= 2., Astrophys.J., 149 ,591.
44. Kerr, R. P. (1963). Gravitational Field of a Spinning Mass as an Example of Algebraically Special Metrics., Phys. Rev. Lett. 11, 237
45. Landau.L.D. and Lifshitz, E.M.(1967). Classical Theory of Fields (Third revised English Edition),Pergamon Press, Oxford, New York, P 325 .