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Probing the Halo Gas Distribution in the Inner Galaxy with Fermi Bubble Observations
Zhang, Ruiyu1,2; Guo, Fulai1,2
2021-07-01
Source PublicationASTROPHYSICAL JOURNAL
ISSN0004-637X
Volume915Issue:2Pages:12
AbstractThe hot halo gas distribution in the inner Milky Way (MW) contains key fossil records of the past energetic feedback processes in the galactic center. Here, we adopt a variety of spherical and disk-like MW halo gas models as initial conditions in a series of simulations to investigate the formation of the Fermi bubbles in the jet-shock scenario. The simulation results are compared directly with relevant X-ray and gamma-ray observations of the Fermi bubbles to constrain the halo gas distribution in the inner Galaxy before the Fermi bubble event. Our best-fit gas density distribution can be described by a power law in radius n (e)(r) = 0.01(r/1 kpc)(-1.5) cm(-3). Our study cannot determine if there is an inner density core, which if exists, should be very small with size r ( c ) less than or similar to 0.5 kpc. When extrapolating to large radii r similar to 50-90 kpc, our derived density distribution lies appreciably below the recently estimated gas densities from ram pressure stripping calculations, suggesting that the halo gas density profile either flattens out or has one or more discontinuities within 10 less than or similar to r less than or similar to 50 kpc. Some of these discontinuities may be related to the eROSITA bubbles, and our derived gas density profile may correspond to the hot gas distribution in the inner eROSITA bubbles about 5 Myr ago.
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; Natural Science Foundation of Shanghai ; Natural Science Foundation of Shanghai ; Chinese Academy of Sciences through the Key Research Program of Frontier Sciences ; Chinese Academy of Sciences through the Key Research Program of Frontier Sciences ; National Science Foundation ; National Science Foundation ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Natural Science Foundation of Shanghai ; Natural Science Foundation of Shanghai ; Chinese Academy of Sciences through the Key Research Program of Frontier Sciences ; Chinese Academy of Sciences through the Key Research Program of Frontier Sciences ; National Science Foundation ; National Science Foundation ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Natural Science Foundation of Shanghai ; Natural Science Foundation of Shanghai ; Chinese Academy of Sciences through the Key Research Program of Frontier Sciences ; Chinese Academy of Sciences through the Key Research Program of Frontier Sciences ; National Science Foundation ; National Science Foundation ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Natural Science Foundation of Shanghai ; Natural Science Foundation of Shanghai ; Chinese Academy of Sciences through the Key Research Program of Frontier Sciences ; Chinese Academy of Sciences through the Key Research Program of Frontier Sciences ; National Science Foundation ; National Science Foundation
DOI10.3847/1538-4357/abfdb1
WOS KeywordX-RAY ; LOCAL GROUP ; DENSITY PROFILE ; HOT GAS ; EMISSION ; CHANDRA ; SIMULATIONS ; SUPERNOVAE ; CLUSTERS ; CORONAE
Language英语
Funding ProjectNational Natural Science Foundation of China[11873072] ; National Natural Science Foundation of China[11633006] ; National Natural Science Foundation of China[11803063] ; Natural Science Foundation of Shanghai[18ZR1447100] ; Chinese Academy of Sciences through the Key Research Program of Frontier Sciences[QYZDB-SSW-SYS033] ; Chinese Academy of Sciences through the Key Research Program of Frontier Sciences[QYZDJ-SSW-SYS008] ; National Science Foundation[NSF PHY-1748958]
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; Natural Science Foundation of Shanghai ; Natural Science Foundation of Shanghai ; Chinese Academy of Sciences through the Key Research Program of Frontier Sciences ; Chinese Academy of Sciences through the Key Research Program of Frontier Sciences ; National Science Foundation ; National Science Foundation ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Natural Science Foundation of Shanghai ; Natural Science Foundation of Shanghai ; Chinese Academy of Sciences through the Key Research Program of Frontier Sciences ; Chinese Academy of Sciences through the Key Research Program of Frontier Sciences ; National Science Foundation ; National Science Foundation ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Natural Science Foundation of Shanghai ; Natural Science Foundation of Shanghai ; Chinese Academy of Sciences through the Key Research Program of Frontier Sciences ; Chinese Academy of Sciences through the Key Research Program of Frontier Sciences ; National Science Foundation ; National Science Foundation ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Natural Science Foundation of Shanghai ; Natural Science Foundation of Shanghai ; Chinese Academy of Sciences through the Key Research Program of Frontier Sciences ; Chinese Academy of Sciences through the Key Research Program of Frontier Sciences ; National Science Foundation ; National Science Foundation
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000671440600001
PublisherIOP PUBLISHING LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/76657
Collection中国科学院国家天文台
Corresponding AuthorGuo, Fulai
Affiliation1.Chinese Acad Sci, Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, 80 Nandan Rd, Shanghai 200030, Peoples R China
2.Univ Chinese Acad Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Zhang, Ruiyu,Guo, Fulai. Probing the Halo Gas Distribution in the Inner Galaxy with Fermi Bubble Observations[J]. ASTROPHYSICAL JOURNAL,2021,915(2):12.
APA Zhang, Ruiyu,&Guo, Fulai.(2021).Probing the Halo Gas Distribution in the Inner Galaxy with Fermi Bubble Observations.ASTROPHYSICAL JOURNAL,915(2),12.
MLA Zhang, Ruiyu,et al."Probing the Halo Gas Distribution in the Inner Galaxy with Fermi Bubble Observations".ASTROPHYSICAL JOURNAL 915.2(2021):12.
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