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The black hole at the Galactic Center: Observations and models

文献类型：期刊论文

作者Zakharov, Alexander F.1,2,3,4,5
刊名INTERNATIONAL JOURNAL OF MODERN PHYSICS D
出版日期2018-04-01
卷号27期号:6页码:15
关键词Black holes supermassive black holes gravitational lensing the Galactic Center large telescopes VLBI interferometry graviton mass theories of massive gravity
ISSN号0218-2718
DOI10.1142/S0218271818410092
英文摘要One of the most interesting astronomical objects is the Galactic Center. It is a subject of intensive astronomical observations in different spectral bands in recent years. We concentrate our discussion on a theoretical analysis of observational data of bright stars in the IR-band obtained with large telescopes. We also discuss the importance of VLBI observations of bright structures which could characterize the shadow at the Galactic Center. If we adopt general relativity (GR), there are a number of theoretical models for the Galactic Center, such as a cluster of neutron stars, boson stars, neutrino balls, etc. Some of these models were rejected or the range of their parameters is significantly constrained with consequent observations and theoretical analysis. In recent years, a number of alternative theories of gravity have been proposed because there are dark matter (DM) and dark energy (DE) problems. An alternative theory of gravity may be considered as one possible solution for such problems. Some of these theories have black hole solutions, while other theories have no such solutions. There are attempts to describe the Galactic Center with alternative theories of gravity and in this case one can constrain parameters of such theories with observational data for the Galactic Center. In particular, theories of massive gravity are intensively developing and theorists have overcome pathologies presented in the initial versions of these theories. In theories of massive gravity, a graviton is massive in contrast with GR where a graviton is massless. Now these theories are considered as an alternative to GR. For example, the LIGO-Virgo collaboration obtained the graviton mass constraint of about 1.2 x 10(-22) eV in their first publication about the discovery of the first gravitational wave detection event that resulted of the merger of two massive black holes. Surprisingly, one could obtain a consistent and comparable constraint of graviton mass at a level around m(g) < 2.9 x 10(-21) eV from the analysis of observational data on the trajectory of the star S2 near the Galactic Center. Therefore, observations of bright stars with existing and forthcoming telescopes such as the European extremely large telescope (E-ELT) and the thirty meter telescope (TMT) are extremely useful for investigating the structure of the Galactic Center in the framework of GR, but these observations also give a tool to confirm, rule out or constrain alternative theories of gravity. As we noted earlier, VLBI observations with current and forthcoming global networks (like the Event Horizon Telescope) are used to check the hypothesis about the presence of a supermassive black hole at the Galactic Center.
WOS关键词K-ALPHA-LINE ; NEAR-INFRARED FLARES ; SGR A-ASTERISK ; R-N GRAVITY ; ACCRETION-DISK ; MILKY-WAY ; STELLAR ORBITS ; MASSIVE GRAVITONS ; ROTATION CURVES ; DARK-MATTER
资助项目Chinese Academy of Sciences[2017VMA0014] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB23040100] ; NSF[HRD-0833184] ; NASA at NASA CADRE Center (NCCU, Durham, NC, USA)[NNX09AV07A] ; NASA at NSF CREST Center (NCCU, Durham, NC, USA)[NNX09AV07A]
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:000430849800010
出版者WORLD SCIENTIFIC PUBL CO PTE LTD
资助机构Chinese Academy of Sciences ; Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; NSF ; NSF ; NASA at NASA CADRE Center (NCCU, Durham, NC, USA) ; NASA at NASA CADRE Center (NCCU, Durham, NC, USA) ; NASA at NSF CREST Center (NCCU, Durham, NC, USA) ; NASA at NSF CREST Center (NCCU, Durham, NC, USA) ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; NSF ; NSF ; NASA at NASA CADRE Center (NCCU, Durham, NC, USA) ; NASA at NASA CADRE Center (NCCU, Durham, NC, USA) ; NASA at NSF CREST Center (NCCU, Durham, NC, USA) ; NASA at NSF CREST Center (NCCU, Durham, NC, USA) ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; NSF ; NSF ; NASA at NASA CADRE Center (NCCU, Durham, NC, USA) ; NASA at NASA CADRE Center (NCCU, Durham, NC, USA) ; NASA at NSF CREST Center (NCCU, Durham, NC, USA) ; NASA at NSF CREST Center (NCCU, Durham, NC, USA) ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; NSF ; NSF ; NASA at NASA CADRE Center (NCCU, Durham, NC, USA) ; NASA at NASA CADRE Center (NCCU, Durham, NC, USA) ; NASA at NSF CREST Center (NCCU, Durham, NC, USA) ; NASA at NSF CREST Center (NCCU, Durham, NC, USA)
源URL[http://ir.bao.ac.cn/handle/114a11/21254]  
专题中国科学院国家天文台
通讯作者Zakharov, Alexander F.
作者单位1.Chinese Acad Sci, Natl Astron Observ, 20A Datun Rd, Beijing 100012, Peoples R China
2.Inst Theoret & Expt Phys, B Cheremushkinskaya 25, Moscow 117218, Russia
3.Joint Inst Nucl Res, Bogoliubov Lab Theoret Phys, Dubna 141980, Russia
4.Natl Res Nucl Univ MEPhI, Moscow Engn Phys Inst, Moscow 115409, Russia
5.North Carolina Cent Univ, Durham, NC 27707 USA
推荐引用方式
GB/T 7714		 Zakharov, Alexander F.. The black hole at the Galactic Center: Observations and models[J]. INTERNATIONAL JOURNAL OF MODERN PHYSICS D,2018,27(6):15.
APA Zakharov, Alexander F..(2018).The black hole at the Galactic Center: Observations and models.INTERNATIONAL JOURNAL OF MODERN PHYSICS D,27(6),15.
MLA Zakharov, Alexander F.."The black hole at the Galactic Center: Observations and models".INTERNATIONAL JOURNAL OF MODERN PHYSICS D 27.6(2018):15.

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