“银河系消光”的版本间差异
		
		
		
		
		
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*[[u,g,r,i,z]] 波段的银河系消光   | 
  *[[u,g,r,i,z]] 波段的银河系消光   | 
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The Galactic extinction in the u band A_u based on the maps of Schlegel et al. (1998, ApJ, 500, 525). For an R_V = 3.1 absorbing medium, the extinctions in the SDSS bands can be expressed as A_x = C_x E(B-V), where x is the filter (ugriz)  | 
  The Galactic extinction in the u band A_u based on the maps of Schlegel et al. (1998, ApJ, 500, 525). For an R_V = 3.1 absorbing medium, the extinctions in the SDSS bands can be expressed as A_x = C_x E(B-V), where x is the filter (ugriz).   | 
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:values of C_x are 5.155, 3.793, 2.751, 2.086, and 1.479 for ugriz, respectively   | 
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:A_g, A_r, A_i, and A_z are 0.736, 0.534, 0.405, and 0.287 times A_u.  | 
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*IDL中的计算程序  | 
  *IDL中的计算程序  | 
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[[  | 
  [[idlutils]]中的dust_sdssfilter  | 
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 aval = dust_sdssfilter(dust_getval(l, b, map='IX', /interp), source='Galaxy')  | 
   aval = dust_sdssfilter(dust_getval(l, b, map='IX', /interp), source='Galaxy')  | 
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==文献==  | 
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*arXiv1607.08623  | 
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:利用造父变星,RR Lyre变星的红外的颜色-颜色图来测量消光系数(变星的光变主要是由于恒星的半径变化引起的,因此内禀的颜色应该不变尤其在近红外波段)  | 
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:在近红外波段,并未发现消光系数随着银精和银心距有明显的变化(而利用O型星得到的在光学波段的效光系数有这种位置依赖性)  | 
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2016年8月11日 (四) 06:36的最新版本
- u,g,r,i,z 波段的银河系消光
 
The Galactic extinction in the u band A_u based on the maps of Schlegel et al. (1998, ApJ, 500, 525). For an R_V = 3.1 absorbing medium, the extinctions in the SDSS bands can be expressed as A_x = C_x E(B-V), where x is the filter (ugriz).
- values of C_x are 5.155, 3.793, 2.751, 2.086, and 1.479 for ugriz, respectively
 - A_g, A_r, A_i, and A_z are 0.736, 0.534, 0.405, and 0.287 times A_u.
 
- IDL中的计算程序
 
idlutils中的dust_sdssfilter
aval = dust_sdssfilter(dust_getval(l, b, map='IX', /interp), source='Galaxy')
文献
- arXiv1607.08623
 
- 利用造父变星,RR Lyre变星的红外的颜色-颜色图来测量消光系数(变星的光变主要是由于恒星的半径变化引起的,因此内禀的颜色应该不变尤其在近红外波段)
 - 在近红外波段,并未发现消光系数随着银精和银心距有明显的变化(而利用O型星得到的在光学波段的效光系数有这种位置依赖性)