1D Models#

Operations#

These models perform simple mathematical operations.

  • Const1D model returns the constant replicated by the number of input x values.

  • Multiply model multiples the input x values by a factor and propagates units if the factor is a Quantity.

  • RedshiftScaleFactor model multiples the input x values by a (1 + z) factor.

  • Scale model multiples by a factor without changing the units of the result.

  • Shift model adds a constant to the input x values.

Shapes#

These models provide shapes, often used to model general x, y data.

  • Linear1D model provides a line parameterizied by the slope and y-intercept

  • Sine1D model provides a sine parameterized by an amplitude, frequency, and phase shift.

  • Cosine1D model provides a cosine parameterized by an amplitude, frequency, and phase shift.

(png, svg, pdf)

../_images/predef_models1D-1.png

Profiles#

These models provide profiles, often used for lines in spectra.

  • Box1D model computes a box function with an amplitude centered at x_0 with the specified width.

  • Gaussian1D model computes a Gaussian with an amplitude centered at x_0 with the specified width.

  • KingProjectedAnalytic1D model computes the analytic form of the a King model with an amplitude and core and tidal radii.

  • Lorentz1D model computes a Lorentzian with an amplitude centered at x_0 with the specified width.

  • RickerWavelet1D model computes a RickerWavelet function with an amplitude centered at x_0 with the specified width.

  • Moffat1D model computes a Moffat function with an amplitude centered at x_0 with the specified width.

  • Sersic1D model computes a Sersic model with an amplitude with an effective radius and the specified sersic index.

  • Trapezoid1D model computes a box with sloping sides with an amplitude centered at x_0 with the specified width and sides with the specified slope.

  • Voigt1D model computes a Voigt function with an amplitude centered at x_0 with the specified Lorentzian and Gaussian widths.

(png, svg, pdf)

../_images/predef_models1D-2.png