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Flashcards in Formulas Deck (25):
1

Luminosity, Temperature and area

L=AσT^4

2

Flux and temperature

F=σT^4

3

Peak of blackbody radiation curve

λ = (2.897*10^-3)/T

4

Energy and luminosity

E = LT

5

Effective T

T = (L/σA)^(1/4)

6

Focal ratio

F = f/D

7

Resolution

θ=λ/D

8

Seeing resolution

θ=λ/size of average air pocket

9

Number of moles in gas

n=ρ/mass of molecule

10

Work done when g is not constant

W = GMm[1/r] between r of Earth and r of earth plus distance traveled

11

Flux and apparent magnitudes

m1 - m2 = -2.5log(F1/F2)

12

Apparent and absolute magnitude to work out distance

m - M = 5log(r) - 5

13

Absolute magnitude and Luminosity with sun

Ma - Ms = -2.5log(La/Ls)

14

Seconds to arc seconds

Seconds*15*Cos(angle in declination) = arcseconds

15

arcseonds to degrees

3600arcseconds = 1 degree

16

Projected Separation

=Δθr

17

Δθ

= sqrt(change in dec squared + change in RA squared)

18

Blackbody radiation

2hc/(((λ^(5))(e^(hc/kTλ)-1))

19

Flux and luminosity

F = L/A

20

Area

4πr^2

21

Distance from parallax

r = 1/p

22

Fraction of photons that lead to an electron being read out

(Quantum efficiency)*(Charge transfer efficiency)^number of pixels

23

Escape velocity =

sqrt(2)Vorb = Vesc

24

Proper motion equation with units

v[km/s] = 4.74μ[arcsec/year]r[Pc]

25

Surface area of object in sky

Ω[sterradian] = (πd^2)/r^2