NAOC Open IR  > 射电天文研究部
Counterclockwise magnetic fields in the norma spiral arm
Han, JL; Manchester, RN; Lyne, AG; Qiao, GJ
AbstractPulsars provide unique probes of the large-scale interstellar magnetic field in the Galactic disk. Up to now, the limited Galactic distribution of the known pulsar population has restricted these investigations to within a few kiloparsecs of the Sun. The Parkes multibeam pulsar survey has discovered many more-distant pulsars, which enables us for the first time to explore the magnetic field in most of the nearby half of the Galactic disk. Here we report the detection of counterclockwise magnetic fields in the Norma spiral arm using pulsar rotation measures. The fields are coherent in direction over a linear scale of similar to5 kpc along the arm and have a strength of -4.4 +/- 0.9 muG. The magnetic field between the Carina-Sagittarius and Crux-Scutum arms is confirmed to be coherent from l similar to 45degrees to l similar to 305degrees over a length of similar to10 kpc. These results strengthen arguments for a bisymmetric spiral model for the field configuration in the Galactic disk.
KeywordGalaxy : Structure Ism : Magnetic Fields Pulsars : General
Indexed BySCI
WOS IDWOS:000175309900005
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Cited Times:45[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Affiliation1.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
2.CAS PKU, Beijing Astrophys Ctr, Beijing 100871, Peoples R China
3.CSIRO, Australia Telescope Natl Facil, Epping, NSW 1710, Australia
4.Univ Manchester, Jodrell Bank Observ, Macclesfield SK11 9DL, Cheshire, England
5.CCAT, World Lab, Beijing 100080, Peoples R China
6.Peking Univ, Dept Astron, Beijing 100871, Peoples R China
Recommended Citation
GB/T 7714
Han, JL,Manchester, RN,Lyne, AG,et al. Counterclockwise magnetic fields in the norma spiral arm[J]. ASTROPHYSICAL JOURNAL,2002,570(1):L17-L20.
APA Han, JL,Manchester, RN,Lyne, AG,&Qiao, GJ.(2002).Counterclockwise magnetic fields in the norma spiral arm.ASTROPHYSICAL JOURNAL,570(1),L17-L20.
MLA Han, JL,et al."Counterclockwise magnetic fields in the norma spiral arm".ASTROPHYSICAL JOURNAL 570.1(2002):L17-L20.
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