Eclipsing variables - classification based on the degree of filling of inner Roche lobes
- AR - Detached systems of the AR Lacertae type. Both components are
subgiants not filling their inner equipotential surfaces.
- D - Detached systems, with components not filling their inner Roche lobes.
- DM - Detached main-sequence systems. Both components are main-sequence
stars and do not fill their inner Roche lobes.
- DS - Detached systems with a subgiant. The subgiant also does not fill its
inner critical surface.
- DW - Systems similar to W UMa systems in physical properties (KW, see
below), but not in contact.
- K - Contact systems, both components filling their inner critical surfaces.
- KE - Contact systems of early (O-A) spectral type, both components being
close in size to their inner critical surfaces.
- KW - Contact systems of the W UMa type, with ellipsoidal components of F0-K
spectral type. Primary components are main-sequence stars and
secondaries lie below and to the left of the main sequence in the
(MV,B-V) diagram.
- SD - Semidetached systems in which the surface of the less massive com-
ponent is close to its inner Roche lobe.
The combination of the above three classification systems for
eclipsers results in the assignment of multiple classifications
for object types. These are separated by a solidus ("/") in the
data field. Examples are: E/DM, EA/DS/RS, EB/WR, EW/KW, etc.
Return to the page "eclipsing variables"
Return to the page "typology"
Return to AFOEV home-page
Let us know your comments