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| author | Aaron LI <aly@aaronly.me> | 2018-10-25 11:56:01 +0800 |
|---|---|---|
| committer | Aaron LI <aly@aaronly.me> | 2018-10-25 11:56:01 +0800 |
| commit | 087822f918a0d6a814da064281305c8fde31b8fa (patch) | |
| tree | 9d56445c846b492a95fdeb00b5c969b751642d17 /fg21sim/extragalactic/clusters | |
| parent | 67b9349a8d1cdc786926a10d5ad3d0c2cc8a6d13 (diff) | |
| download | fg21sim-087822f918a0d6a814da064281305c8fde31b8fa.tar.bz2 | |
clusters/halo: Change _merger() to accept time to simplify its usage
Diffstat (limited to 'fg21sim/extragalactic/clusters')
| -rw-r--r-- | fg21sim/extragalactic/clusters/halo.py | 24 |
1 files changed, 12 insertions, 12 deletions
diff --git a/fg21sim/extragalactic/clusters/halo.py b/fg21sim/extragalactic/clusters/halo.py index 4e1b0bf..2236000 100644 --- a/fg21sim/extragalactic/clusters/halo.py +++ b/fg21sim/extragalactic/clusters/halo.py @@ -801,11 +801,13 @@ class RadioHaloAM(RadioHalo): idx = self._merger_idx(t) return self.age_merger[idx] - def _merger(self, idx): + def _merger(self, t): """ - Return the properties of the idx-th merger event. + Return the merger event at cosmic time ``t``. """ + idx = self._merger_idx(t) return { + "idx": idx, "M_main": self.M_main[idx], "M_sub": self.M_sub[idx], "z": self.z_merger[idx], @@ -820,8 +822,7 @@ class RadioHaloAM(RadioHalo): if t >= self.age_obs: return self.M_obs else: - idx = self._merger_idx(t) - merger = self._merger(idx) + merger = self._merger(t) return (merger["M_main"] + merger["M_sub"]) def mass_sub(self, t): @@ -829,8 +830,7 @@ class RadioHaloAM(RadioHalo): The mass of the sub cluster at the given (cosmic) time. Unit: [Msun] """ - idx = self._merger_idx(t) - merger = self._merger(idx) + merger = self._merger(t) return merger["M_sub"] def mass_main(self, t): @@ -849,17 +849,17 @@ class RadioHaloAM(RadioHalo): The mass of the main cluster. Unit: [Msun] """ - idx = self._merger_idx(t) - merger1 = self._merger(idx) + merger1 = self._merger(t) + idx1 = merger1["idx"] mass1 = merger1["M_main"] t1 = merger1["age"] - if idx == 0: + if idx1 == 0: mass0 = self.M_obs t0 = self.age_obs else: - merger0 = self._merger(idx-1) - mass0 = merger0["M_main"] - t0 = merger0["age"] + idx0 = idx1 - 1 + mass0 = self.M_main[idx0] + t0 = self.age_merger[idx0] rate = (mass0 - mass1) / (t0 - t1) return (mass1 + rate * (t - t1)) |