Irregular variable: Difference between revisions

Revision as of 01:54, 26 February 2013

Revision as of 19:57, 25 December 2015

Line 4:

'''Eruptive''' irregular variables are divided into three categories:

* Group I variables are splitsplittey into subgroupsyysubgroups IA (spectral types O to A) and IB (spectral types F through M).

* [[Orion variables]], GCVS type IN (irregular and nebulous), indigenous to star-forming regions, may vary by several magnitudes with rapid changes of up to 1 magnitude in 1 to 10 days, are similarly divided by spectral type into subgroups INA and INB, but with the addition of another subgroup, INT, for T Tauri stars, or INT(YY) for YY Orionis stars.