CosmoMC: SDSS data
Posted: February 21 2006
Hi All,
There are two parameters for the SDSS data in the CosmoMC code: mpk_points and mpk_kbands.
The comment on mpk.f90 says:
max_mpk_points_use ! in case you don't want the smallest scale modes (eg. sdss)
min_mpk_points_use ! in case you don't want the largest scale modes
max_mpk_kbands_use ! in case you don't want to calc P(k) on the smallest scales (will truncate P(k) to zero here!)
min_mpk_kbands_use ! in case you don't want to calc P(k) on the smallest scales (will truncate P(k) to zero here!)
So I guess mpk_points represents different data set; large value of max_mpk_points means small scales data and small value of min_mpk_points means large scales data. As for the mpk_kbands, it just means the range of k/h space at which we calculate the spectrum. Am I right?
Besides, both max_mpk_kbands and min_mpk_kbands say "smallest scales", a typo?
(I am using July 2005 version.)
Thanks.
Loison Hoi
21 Feb 2006
There are two parameters for the SDSS data in the CosmoMC code: mpk_points and mpk_kbands.
The comment on mpk.f90 says:
max_mpk_points_use ! in case you don't want the smallest scale modes (eg. sdss)
min_mpk_points_use ! in case you don't want the largest scale modes
max_mpk_kbands_use ! in case you don't want to calc P(k) on the smallest scales (will truncate P(k) to zero here!)
min_mpk_kbands_use ! in case you don't want to calc P(k) on the smallest scales (will truncate P(k) to zero here!)
So I guess mpk_points represents different data set; large value of max_mpk_points means small scales data and small value of min_mpk_points means large scales data. As for the mpk_kbands, it just means the range of k/h space at which we calculate the spectrum. Am I right?
Besides, both max_mpk_kbands and min_mpk_kbands say "smallest scales", a typo?
(I am using July 2005 version.)
Thanks.
Loison Hoi
21 Feb 2006