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Astronomy: CALCULATION OF THE DEPLETION FACTORS VALUES OF POTASSIUM AND CARBON IN INTERSTELLAR MATTER

 

CALCULATION OF THE DEPLETION FACTORS VALUES OF POTASSIUM AND CARBON IN INTERSTELLAR MATTER

LM.KARIM & *11. A. Y. AL-MALLAH

Department of Astronomy- College of Science - Baghdad University / Baghdad - Iraq ‘Department of Meteorology- College of Science Al Mustansirriyah Universityl / Baghdad - Iraq

ABSTRACT

The value of the ratio of the electron density to the carbon density (r) is proved a variable value and it is not equal to (1) as it has been supposed by authors but it is more greater and it's value variation between (7565.984) and (27525.37) with the changing of the line of sight. This value leads us to the fact that the electron density is not due to the atomic carbon but it is due to the atomic hydrogen, whereas the value of (r) correspond with carbon solar abundance ratio which it is (C/H10-4). Potassium depletion (δK) and carbon depletion (δc) values are calculated as well as the electron density to carbon density ratio (r) and potassium ultraviolet attenuation for seventy-seven stars. It is appear that their values are variable and depending in their changing on their colour excess. The product result of (rδc ) is found constant and is found to be equal to (103.858) and the product result for is found constant also and is found to be equal to (520.483x10J).


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