Summary: Versions of CCP7 SYNSPEC code
M. Zboril
Armagh Observatory, College Hill, Armagh, BT61 9DG, N. Ireland
Abstract. A general spectrum synthesis CCP7 program SYNSPEC was
modified for the purposes to analyse the atmospheres of CP stars as well
as very late type stars. Modifications result into two versions of the code:
for PC's and computers basically with UNIX­based operating systems.
1. Introduction
Program SYNSPEC is a general spectrum synthesis program. CCP7 version
assumes that the model atmosphere is given. Subsequently, under the stellar at­
mosphere approximation by plane­parallel geometry and radiative, hydrostatic,
statistical equilibria it operates with differential equation form of radiative trans­
fer equation to produce normal synthetic spectrum, detailed line profiles of a few
individual lines, emergent flux in continuum, or simply identification table only,
but all these outputs are optional. The more detailed description and a guide
how to work with can be found in Hubeny, Lanz and Jeffery (1994).
The program is very flexible and basic set up is for early type stars but unfortu­
nately not primarily for study CP stars. Consequently, since having dealt with
CP stellar atmospheres a time, some modifications were necessary and are to be
described. Recently, another modifications regarding late type stars have been

Source: Armagh Observatory

Collections: Physics