From 40e5a5811c6ffce9b0974e93cdd927cbcf60c157 Mon Sep 17 00:00:00 2001 From: Joe Hunkeler Date: Tue, 11 Aug 2015 16:51:37 -0400 Subject: Repatch (from linux) of OSX IRAF --- math/slalib/doc/rvlsrd.hlp | 51 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 51 insertions(+) create mode 100644 math/slalib/doc/rvlsrd.hlp (limited to 'math/slalib/doc/rvlsrd.hlp') diff --git a/math/slalib/doc/rvlsrd.hlp b/math/slalib/doc/rvlsrd.hlp new file mode 100644 index 00000000..f7539867 --- /dev/null +++ b/math/slalib/doc/rvlsrd.hlp @@ -0,0 +1,51 @@ +.help rvlsrd Jun99 "Slalib Package" +.nf + + REAL FUNCTION slRVLD (R2000, D2000) + + - - - - - - - + R V L D + - - - - - - - + + Velocity component in a given direction due to the Sun's motion + with respect to the dynamical Local Standard of Rest. + + (single precision) + + Given: + R2000,D2000 r J2000.0 mean RA,Dec (radians) + + Result: + Component of "peculiar" solar motion in direction R2000,D2000 (km/s) + + Sign convention: + The result is +ve when the Sun is receding from the given point on + the sky. + + Note: The Local Standard of Rest used here is the "dynamical" LSR, + a point in the vicinity of the Sun which is in a circular + orbit around the Galactic centre. The Sun's motion with + respect to the dynamical LSR is called the "peculiar" solar + motion. + + There is another type of LSR, called a "kinematical" LSR. A + kinematical LSR is the mean standard of rest of specified star + catalogues or stellar populations, and several slightly + different kinematical LSRs are in use. The Sun's motion with + respect to an agreed kinematical LSR is known as the "standard" + solar motion. To obtain a radial velocity correction with + respect to an adopted kinematical LSR use the routine slRVLK. + + Reference: Delhaye (1965), in "Stars and Stellar Systems", vol 5, + p73. + + Called: + slCS2C, slVDV + + P.T.Wallace Starlink 9 March 1994 + + Copyright (C) 1995 Rutherford Appleton Laboratory + Copyright (C) 1995 Association of Universities for Research in Astronomy Inc. + +.fi +.endhelp -- cgit