超新星遗迹和相关联天体的21厘米中性氢观测-北京大学.PPT

超新星遗迹的射电巡天观测和甚高能伽玛射线源研究 概要 21厘米中性氢原子(HI)谱线银道面巡天简介及建立新方法(Tian Leahy方法)获得可信赖的超新星遗迹和相关联天体的距离(或范围) 超新星遗迹和分子云的相互作用导致很多天体物理现象,如加速带电粒子到相对论能量, 产生可以观测到的TeV伽玛射线. 测定天体的距离可以直接检验超新星遗迹是河内宇宙线粒子起源处的合理性 实例: 四个超新星遗迹和TeV源相关联系统:G29.7-0.3/PSR J1846-0258/HESS J1846-029, G21.5-0.9 /PSR J1833-1034/HESS J1833-105, G23.3-0.3/HESS 1834-087,G353.6-0.7/HESS J1731-347; 一个含异常X-光线脉冲的年青超新星遗迹 G27.4+0.0 /AXP 1E1841+045;一个正与临近大CO分子云相互作用的超新星遗迹 G18.8+0.3; 及一个产生1720兆赫兹OH脉泽辐射的年青超新星遗迹 G21.8-0.6. 21-cm HI observations in the Milky Way disk 13CO(J=1-0) data from the Galactic ring survey (Jackson et al.2006, ApJS, 163, 145) by the Five College Radio Astronomy Observatory 14m telescope: Range:18l56d, -1b1d FWHM:46x46x0.21 km/s rms:~ 0.13 K per channel. Velocity range: -5-- 135 km/s (=40d), -5-- 85km/s(=-40d) T Rotation curve of Milky Way stays flat with distance The long-standing puzzle on Kes 75/PSR J1846-0258 is resolved (Leahy Tian, 2008, AA, 480, L25. 已7次独立引用, 改写了前面的结果:Becker Helfand, 1984, ApJ, 283, 154,被引用36次) HI+CO spectra confirm the above conclusion. The CO cloud (~89 km/s) is behind Kes 73. Limits to distance of Kes 73/AXP 1E1841-045 between the far distance (9.4 kpc) of 89 km/s and the tangent point (7.5 kpc) which was used as an upper limit in past 20 yrs. Kes 73 has a refined age of 500 to 1000yr, the AXP has a larger 50% X-ray luminosity. Tian Leahy, ApJ, 2008, 677, 692 SNR/Cloud interaction The distance to Kes 69 and G21.5-0.9 Kes 69 HI spectrum: max velocity of absorption ~86 km/s; HI emission feature at 113 km/s with no respective absorption. CO image + spectrum: adjoining cloud at ~ 85 km/s, no prominent cloud around 70 km/s towards the bright southern shell. New detected 1720 MHz OH maser at velocity 80-86km/s from within the southern shell of Kes 69. Conclusions: distance of ~5.5 kpc to Kes 69, and physical interaction between Kes 69 and adjoining cloud. G21.5-0.9 and PMN J1832-1035 http://www.mppmu.mpg.de/~rwagner.sources The thick-solid lin