Almog
Yalinewich
Pulsar
Coffee
7.2.20
Energy budget
Efficiency?
Albedo?
(regressive energy distribution)
Extremely Low Mass Companion
PSR J1719-1438 and PSR J2322-2650
Hydrostatic
Coasting
Mass flux
Inelastic Compton Scattering
Ionisation
lines
Inelastic Compton Scattering
free free
free bound
lines
Difficulty in cooling past 10,000 K
High densities
constant temperature
Low densities
ff cooling
minimum pressure
Escape temperature
Inverse Compton temperature
Characteristic temperature
Escape temperature
Inverse Compton temperature
Characteristic temperature
Sonic point is extremely close to the surface
Mass loss rate
Sonic point is withing a few stellar radii
Mass loss rate
Sonic point is much larger than stellar radius
speed of sound
velocity
mass loss
Gas escapes through narrow angle
Net mass loss
Characteristic temperature from Compton heating
Efficiency
Evaporation time
Synchronised
Lagging
Magnetic breaking
compensation from orbital angular momentum
Net result: Depletion of orbital angular momentum
Split monopole magnetic field
equilibrium between magnetic and ram pressure
Matter is co - rotating up to the Alfven radius, so mass loss required for factor of two spin - down is
Evaporation time determined by
Evaporation with fixed orbital parameters is too slow to explain observations
mass loss is regulated by magnetic braking
questions?