Review the formation and characteristics of black holes – examining the properties of Sgr A* centered at Milky Way
DOI:
https://doi.org/10.61173/ht11tb05Keywords:
Black hole, Sgr A*Abstract
The black hole is one of the important celestial bodies in the universe, and understanding its properties is important to help us understand universe and our homeland Milky way. My aims are to explore the properties of center black hole on Milky Way, Sagittarius A (Sgr A*). I first review the properties of black hole in the literature, including the formation of black hole, classification, and observations of black holes. Then, I examine the properties of Sgr A*, exploring its mass-calculation based on observation and properties as supermassive black hole. Through this study, I find that Sgr A* can form from gravitational collapse of a massive cloud of gas and dust, properties and observations like accretion disk, gravitational influence, and gravitational waves it has as a supermassive black hole, and its mass can be calculated from star orbit. In summary, studying the properties of Sgr A* is crucial to understanding our galaxy, and the fundamental nature of the universe.References
[1] Celotti, A., Miller, J. C., & Sciama, D. W. (1999). Astrophysical evidence for the existence of black holes. Classical and Quantum Gravity, 16(12A), A3–A21. https://doi. org/10.1088/0264-9381/16/12a/301
[2] Hawking, S. (1971). Gravitationally Collapsed Objects of Very Low Mass. Monthly Notices of the Royal Astronomical Society, 152(1), 75–78. https://doi.org/10.1093/mnras/152.1.75
[3] Deng, H. (2020). Primordial black hole formation by vacuum bubbles. Part II. Journal of Cosmology and Astroparticle Physics, 2020(09), 023–023. https://doi.org/10.1088/1475- 7516/2020/09/023
[4] Bowyer, S., Byram, E. T., Chubb, T. A., & Friedman, H. (1965). Cosmic X-ray Sources. Science, 147(3656), 394–398. https:// doi.org/10.1126/science.147.3656.394
[5] The Astrophysics Journal Letter (2022 May). Focus on First Sgr A* Results from the Event Horizon Telescope. Retrieved from https://iopscience.iop.org/journal/2041-8205/page/Focus_ on_First_Sgr_A_Results
[6] Abbott, B. P. (2017). Observation of Gravitational Waves from a Binary Black Hole Merger. Centennial of General Relativity, 291–311. https://doi.org/10.1142/9789814699662_0011
[7] Linvoshuoyuzhou, 2022 Apr, yuzhouzatan, retrieved from https://www.bilibili.com/video/BV17r4y1n7g8/?spm_id_ from=333.999.0.0&vd_source=0ffc559eb4dcadbfedf2db6695b2 68de
[8] Inomata, K., McDonough, E., & Hu, W. (2021). Primordial black holes arise when the inflaton falls. Physical Review D, 104(12). https://doi.org/10.1103/physrevd.104.123553
[9] Mommytalk, 2019 June, Tianwen17, retrieved from https:// www.bilibili.com/video/BV194411N7v9/?vd_source=0ffc559eb 4dcadbfedf2db6695b268de
[10] Kawana, K., & Xie, K.-P. (2022). Primordial black holes from a cosmic phase transition: The collapse of Fermi-balls. Physics Letters B, 824, 136791. https://doi.org/10.1016/ j.physletb.2021.136791
[11] NASA. (2011, September 19). How can we detect black holes?. Retrieved from https://chandra.harvard.edu/blog/ node/308
[12] NASA. (2023, November) Types of black holes. Retrieved from https://universe.nasa.gov/black-holes/types/
[13] Gravitational wave (Ed.) (2023 November 22) in Wikipedia. Retrieved from https://en.wikipedia.org/w/index. php?title=Gravitational_wave&action=history
[14] Abbott, B. P., Abbott, R., Abbott, T. D., Abraham, S., Acernese, F., Ackley, K., Adams, C., Adhikari, R. X., Adya, V. B., Affeldt, C., Agathos, M., Agatsuma, K., Aggarwal, N., Aguiar, O. D., Aiello, L., Ain, A., Ajith, P., Allen, G., … Allocca, A. (2019). Binary Black Hole Population Properties Inferred from the First and Second Observing Runs of Advanced LIGO and Advanced Virgo. The Astrophysical Journal, 882(2), L24. https://doi. org/10.3847/2041-8213/ab3800
[15] Eisenhauer, F., Genzel, R., Alexander, T., Abuter, R., Paumard, T., Ott, T., Gilbert, A., Gillessen, S., Horrobin, M., Trippe, S., Bonnet, H., Dumas, C., Hubin, N., Kaufer, A., Kissler‐Patig, M., Monnet, G., Strobele, S., Szeifert, T., Eckart, A., … Zucker, S. (2005). SINFONI in the Galactic Center: Young Stars and Infrared Flares in the Central Light‐ Month. The Astrophysical Journal, 628(1), 246–259. https://doi. org/10.1086/430667
[16] Do, T., Hees, A., Ghez, A., Martinez, G. D., Chu, D. S., Jia, S., Sakai, S., Lu, J. R., Gautam, A. K., O’Neil, K. K., Becklin, E. E., Morris, M. R., Matthews, K., Nishiyama, S., Campbell, R., Chappell, S., Chen, Z., Ciurlo, A., Dehghanfar, A., … Wizinowich, P. (2019). Relativistic redshift of the star S0-2 orbiting the Galactic Center supermassive black hole. Science, 365(6454), 664–668. https://doi.org/10.1126/science.aav8137
Downloads
Published
Issue
Section
License
Copyright (c) 2024 by the authors.

This work is licensed under a Creative Commons Attribution 4.0 International License.
