- ... Pegasi
- Appendix A is only available in electronic form at http://www.aanda.org
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- ...
velocity
- In this paper we use the expression ``line-of-sight
velocity'' instead of ``radial velocity'' because the latter could be
confused with the velocity radially from the star, i.e. the expansion
velocity of the stellar envelope. All velocities in this paper are
relative to the local standard of rest (LSR).
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- ... Effelsberg
- The 100-m Effelsberg telescope is operated by the Max-Planck-Institut für Radioastronomie (MPIfR) at Bonn, Germany.
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- ... Medicina
- The 32-m Medicina
telescope is operated by the Istituto di Radioastronomia (IRA) at Bologna, Italy.
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- ... VLA
- NRAO is operated by Associated Universities, Inc., under cooperative agreement with the US National Science Foundation.
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- ... beam
- In previous works and up
to 2003 April a flux density of 18.8 Jy was adopted for DR 21, following Dent
(1972). In this paper, all data have been recalibrated using the value
given by Ott et al. (1994).
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- ...
System
- http://www.aoc.nrao.edu/aips/
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- ... (AAVSO
- http://www.aavso.org/
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