NAOC Open IR  > 光学天文研究部
The gas-to-extinction ratio and the gas distribution in the Galaxy
Zhu, Hui1,2,3; Tian, Wenwu1,4,5; Li, Aigen3; Zhang, Mengfei1,4
2017-11-01
发表期刊MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷号471期号:3页码:3494-3528
摘要We investigate the relation between the optical extinction (AV) and the hydrogen column density (N-H) determined from X-ray observations of a large sample of Galactic sightlines towards 35 supernova remnants, 6 planetary nebulae and 70 X-ray binaries for which NH was determined in the literature with solar abundances. We derive an average ratio of < N-H/A(V)> = (2.08 +/- 0.02) x 10(21) H cm(-2) mag(-1) for the whole Galaxy. We find no correlation between < N-H/A(V)> and the number density of hydrogen, the distance away from the Galactic Centre and the distance above or below the Galactic plane. The < N-H/A(V)> ratio is generally invariant across the Galaxy, with < NH/AV > = (2.04 +/- 0.05) x 10(21) H cm(-2) mag(-1) for the first and fourth Galactic quadrants and < N-H/A(V)> = (2.09 +/- 0.03) x10(21) H cm(-2) mag(-1) for the second and third Galactic quadrants. We also explore the distribution of hydrogen in the Galaxy by enlarging our sample with additional 74 supernova remnants for which both NH and distances are known. We find that, between the Galactic radius of 2 and 10 kpc, the vertical distribution of hydrogen can be roughly described by a Gaussian function with a scaleheight of h = 75.5 +/- 12.4 pc and a mid-plane density of n(H)(0) = 1.11 +/- 0.15 cm(-3), corresponding to a total gas surface density of Sigma(gas) similar to 7.0M(circle dot) pc(-2). We also compile N-H from 19 supernova remnants and 29 X-ray binaries for which NH was determined with subsolar abundances. We obtain < N-H/A(V)> = (2.47 +/- 0.04) x 10(21) H cm(-2) mag(-1) which exceeds that derived with solar abundances by similar to 20 per cent. We suggest that in future studies one may simply scale N-H derived from subsolar abundances by a factor of similar to 1.2 when converting to NH of solar abundances.
文章类型Article
关键词Planetary Nebulae: General Dust Ism: Supernova Remnants Extinction X-rays: Binaries
WOS标题词Science & Technology ; Physical Sciences
资助者NSFC(10273025 ; NSFC(10273025 ; NSF(AST-1311804) ; NSF(AST-1311804) ; NASA(NNX14AF68G) ; NASA(NNX14AF68G) ; 11473038 ; 11473038 ; 11603039) ; 11603039) ; NSFC(10273025 ; NSFC(10273025 ; NSF(AST-1311804) ; NSF(AST-1311804) ; NASA(NNX14AF68G) ; NASA(NNX14AF68G) ; 11473038 ; 11473038 ; 11603039) ; 11603039)
DOI10.1093/mnras/stx1580
关键词[WOS]X-RAY BINARY ; GALACTIC SUPERNOVA REMNANT ; PULSAR WIND NEBULA ; XMM-NEWTON OBSERVATIONS ; CANDIDATE SWIFT J1753.5-0127 ; DEEP CHANDRA OBSERVATIONS ; HIGH-RESOLUTION SPECTROSCOPY ; GLOBULAR-CLUSTER NGC-6712 ; BROAD-BAND SPECTRUM ; OPTICAL LIGHT-CURVE
收录类别SCI
语种英语
资助者NSFC(10273025 ; NSFC(10273025 ; NSF(AST-1311804) ; NSF(AST-1311804) ; NASA(NNX14AF68G) ; NASA(NNX14AF68G) ; 11473038 ; 11473038 ; 11603039) ; 11603039) ; NSFC(10273025 ; NSFC(10273025 ; NSF(AST-1311804) ; NSF(AST-1311804) ; NASA(NNX14AF68G) ; NASA(NNX14AF68G) ; 11473038 ; 11473038 ; 11603039) ; 11603039)
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
WOS记录号WOS:000409035700071
引用统计
文献类型期刊论文
条目标识符http://ir.bao.ac.cn/handle/114a11/20138
专题光学天文研究部
作者单位1.Chinese Acad Sci, Natl Astron Observ, Key Lab Opt Astron, Beijing 100012, Peoples R China
2.Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA
3.Univ Missouri, Dept Phys & Astron, Columbia, MO 65211 USA
4.Univ Chinese Acad Sci, Sch Astron & Space Sci, Beijing 100049, Peoples R China
5.Univ Calgary, Dept Phys & Astron, Calgary, AB T2N 1N4, Canada
推荐引用方式
GB/T 7714
Zhu, Hui,Tian, Wenwu,Li, Aigen,et al. The gas-to-extinction ratio and the gas distribution in the Galaxy[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2017,471(3):3494-3528.
APA Zhu, Hui,Tian, Wenwu,Li, Aigen,&Zhang, Mengfei.(2017).The gas-to-extinction ratio and the gas distribution in the Galaxy.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,471(3),3494-3528.
MLA Zhu, Hui,et al."The gas-to-extinction ratio and the gas distribution in the Galaxy".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 471.3(2017):3494-3528.
条目包含的文件
条目无相关文件。
个性服务
推荐该条目
保存到收藏夹
查看访问统计
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Zhu, Hui]的文章
[Tian, Wenwu]的文章
[Li, Aigen]的文章
百度学术
百度学术中相似的文章
[Zhu, Hui]的文章
[Tian, Wenwu]的文章
[Li, Aigen]的文章
必应学术
必应学术中相似的文章
[Zhu, Hui]的文章
[Tian, Wenwu]的文章
[Li, Aigen]的文章
相关权益政策
暂无数据
收藏/分享
所有评论 (0)
暂无评论
 

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。