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Sam Mangham edited this page Jul 12, 2019 · 3 revisions

KWD.mdot_r_exponent

The exponent for the mass loss rate as defined in the KWD model, m_dot(r) = F(r) ** alpha = T(r) ** (4 * alpha). F is the local luminous flux and T is the local temperature at a radius R. A value of 0 sets a uniform mass loss rate.

Type

Double

Values

Greater than or equal to 0

Parent(s)

File: knigge.c

KWD.v_zero

Multiple of the local sound speed at the base of the wind, this results in the initial velocity of the wind being able to be greater or less than the local sound speed.

Type

Double

Unit

Sound speed at wind base

Values

Greater than 0

Parent(s)

File: knigge.c

KWD.acceleration_length

The size of the acceleration length scale for a disk wind described by the KWD model.

Type

Double

Unit

cm

Values

Greater than 0

Parent(s)

File: knigge.c

KWD.rmax

The radius at which the disk wind terminates, in units of central object radii. This has to be greater than rmin.

Type

Double

Unit

Central_object.radius

Values

Greater than KWD.rmin

Parent(s)

File: knigge.c

KWD.acceleration_exponent

Sets the length scale over which the accleration to v_inf is accomplished. It is the value of the exponent beta for the Caster & Lamers equation of a stellar wind, v(r) = v_0 + (v_inf - v_0) * (1 - R_s/r) ** beta.

Type

Double

Values

Greater than 0

Parent(s)

File: knigge.c

KWD.rmin

The radius at which the disk wind begins, in units of central object radii.

Type

Double

Unit

Central_object.radius

Values

Greater than 1

Parent(s)

File: knigge.c

KWD.d

The ratio d/d_min is used to describe the degree of geometric collimation of the disk wind in the KWD model. However, d (the distance to the focal point in central object radii) is used as this provides a more natural parameter.

Type

Double

Unit

Central_object.radius

Values

Greater than 0

Parent(s)

File: knigge.c

KWD.v_infinity

The velocity at large distances of a steller wind described by the KWD model, in units of escape velocity. Described in terms of Castor & Lamers equation, v(r) = v_0 + (v_inf - v_0) * (1 - R_s/r) ** beta.

Type

Double

Unit

Escape velocity

Values

Greater than 0

Parent(s)

File: knigge.c

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