I would like to know how I can estimate the tangential and cross component of the galaxy's shear using Gnomonic projection of the right ascension and declination the galaxies relate to the center of galaxy cluster and estimate ?

  • $\begingroup$ Please elaborate what you mean by shear? When I read the title I thought about the shear in the galactic velocity fields and Oort's constants ... $\endgroup$ – Walter Sep 5 '14 at 9:59
  • $\begingroup$ @Walter shear is the second order moment of galaxy's surface brightness. You can find more exclusive explanation here $\endgroup$ – Dalek Sep 5 '14 at 10:26

Your Answer

By clicking "Post Your Answer", you acknowledge that you have read our updated terms of service, privacy policy and cookie policy, and that your continued use of the website is subject to these policies.

Browse other questions tagged or ask your own question.