Next: Test of the Initial Up: Restrictions on the Scenario Previous: Basic Observational Data for
|
Документ взят из кэша поисковой машины. Адрес
оригинального документа
: http://xray.sai.msu.ru/~mystery/articles/review/node43.html
Дата изменения: Wed Feb 26 14:51:59 1997 Дата индексирования: Tue Oct 2 14:45:17 2012 Кодировка: Поисковые слова: http www.sao.ru jet |
Next: Test
of the Initial Up: Restrictions
on the Scenario Previous: Basic
Observational Data for
In order to compare the number of different evolutionary stages obtained and X-ray luminosity of the chosen X-ray sources with the observed galactic values we use the sum of C/O+O/C, where C and O are the calculated and observed values of a given binary type, respectively. If we make comparison for a number of different binary species (for example, we compare the number of CV, number of X-ray pulsars, total X-ray luminosity of LMXB, etc.), we write this criterion in the form:
where the sum is taken for each i-th species, and 
are corresponding weights.
Obviously, this function reaches a minimum value of 2 once C=O
for all species. When 
at least for one of the species considered, this criterion rapidly increases
(note that always 
by definition). This criterion is of course a rough measure of coincidence,
and is used just to somehow compare the values which we know to within
at least a factor of 2. We also note that the criterion in this form accounts,
with equal power, for both rare encountered stages (for example, short-living
superaccreting SS433-like binaries) and copious stages (for example, CV)
of binary evolution.
As was noted by I.E. Panchenko, 
, that is our criterion essentially represents a modification of the widely
used 
value.
