Cold Brown Dwarf WISEPC J0458+64
THE FIRST ULTRA-COOL BROWN DWARF DISCOVERED BY THE WIDE-FIELD INFRARED SURVEY EXPLORER
- A. Mainzer (JPL) et al.
- 600 K
- signal-to-noise ratio of ∼36 at 4.6 μm.
- estimated distance of 6–10 pc.
p6 what does "fMC = 0.34" mean?
p6 photometric distance of 9.0 ± 1.9 pc, absolute magnitude MJ = 17.7 ± 0.45
- assume 8 pc
use http://www.calctool.org/CALC/phys/astronomy/star_magnitude, 17.7 -> 0.00000711214*383e24 W sun -> 2.72e21 W
bb 600K is 7350W/m2 emissivity=1 -> 170,000 km radius estimated
- Sun is 696,340 km, Jupiter is 72,000 km radius