02:4102:41, 6 December 2012diffhist+887
Zeta Reticuli
Calculated luminosities (see notes) and added an individual metallicity for zeta2 from 2012 paper. Quoted paper takes -0.21 dex from "del Peloso, E. F et al, 2000" as the metallicity for zeta1 but paper recalculates -0.16 dex for zeta2.
04:0604:06, 23 November 2012diffhist−2
Interstellar travel
→Beamed propulsion: 21,500 TW for deceleration stage (21,500/3*)*(100-(11+13+16%))=4,300 TW. For return stage photons not shifted to red so no energy is lost (gained?), only 40% from diffraction & other. Stopping decel. stage loss only diffraction 16%
02:5302:53, 23 November 2012diffhist−1
Interstellar travel
→Beamed propulsion: At the final deceleration stage, or the stopping phase as called in the paper, the weight of the 100 km sail is 1/10th that of the return stage two sail set-up. So requires 1/10 the power plus closer to power source. I think.
02:2502:25, 23 November 2012diffhist−1
Interstellar travel
→Beamed propulsion: Return stage has 1/10th the mass so it would require 1/10th the power of the previous deceleration stage, assuming deceleration stage amount is correct. Not convinced about mass of 785t as manned mission would include habitat.
02:4102:41, 6 December 2012diffhist+887
Zeta Reticuli
Calculated luminosities (see notes) and added an individual metallicity for zeta2 from 2012 paper. Quoted paper takes -0.21 dex from "del Peloso, E. F et al, 2000" as the metallicity for zeta1 but paper recalculates -0.16 dex for zeta2.
04:0604:06, 23 November 2012diffhist−2
Interstellar travel
→Beamed propulsion: 21,500 TW for deceleration stage (21,500/3*)*(100-(11+13+16%))=4,300 TW. For return stage photons not shifted to red so no energy is lost (gained?), only 40% from diffraction & other. Stopping decel. stage loss only diffraction 16%
02:5302:53, 23 November 2012diffhist−1
Interstellar travel
→Beamed propulsion: At the final deceleration stage, or the stopping phase as called in the paper, the weight of the 100 km sail is 1/10th that of the return stage two sail set-up. So requires 1/10 the power plus closer to power source. I think.
02:2502:25, 23 November 2012diffhist−1
Interstellar travel
→Beamed propulsion: Return stage has 1/10th the mass so it would require 1/10th the power of the previous deceleration stage, assuming deceleration stage amount is correct. Not convinced about mass of 785t as manned mission would include habitat.