Image Analysis Program :: essays research papers

Purpose to become familiar with the image analysis chopine and to develop an understanding to the size and age of planetary nebulaeProcedureThe offset part of the experiment involved using a picture of a church and back round to understand different picture elements, ADU, zoom, and how to get the (x,y) coordinates. We thus took this brief understanding of pictures and applied it to the stars. We loaded a picture of nebulae m42. by and by this we call for to calculate the average number of stars or solar masses. We make up the (x,y) coordinates of a position in the center of the nebulae and on the edge of the nebulae. We use the following distance design to find the distance between the points. subsequently this calculation the answer in pixels inevitable to be exchangeed to glint seconds for use in the small angle conventionality where 1 pixel approx. = 3 arc seconds. We now could use the small angle formula to find the actual radius in pc. Where d is the radius D is the distance from the orb in pc and theta is the value we had just rear out in arc seconds.After the calculation we needed to convert pc to meters so we used the calculation factor of 1pc=3*1016m Now we needed to find the density. Density was figured out by multiplying the majority substance in the nebulae (hydrogen) per cubic m3 by the mass of hydrogen in kg, which gave us the formulaWe then had the info we needed to find the mass of the nebulae. We calculated this by using a spherical shape for ease of calculation. We used the following formula where m is the mass p is the density and r is the radius found above from the small angle formula (d).Now that we had the amount of mass we needed to find the solar masses so we divided the mass of the nebulae by one solar mass unity in the following equation.Our close part of this lab was to find the age of the nebulae m57 .We used the same formula and procedure as before to find the radius of the star. The distance from Earth was given t o us to complete the small angel formula. We then needed to convert from the au to km by the following equation.We were told the expansion of the nebulae to be 20 km/s and assumed this had been going on since the contain of the nebulae for simplicity of calculation.