银河系消光

来自Shiyin's note
Shen讨论 | 贡献2015年10月20日 (二) 07:44的版本
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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) and 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')