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| author | Aaron LI <aly@aaronly.me> | 2019-02-27 21:58:44 +0800 |
|---|---|---|
| committer | Aaron LI <aly@aaronly.me> | 2019-02-27 23:57:12 +0800 |
| commit | 963f6f4015c856f2f695f3634b47ed903ade5adf (patch) | |
| tree | bdee4f28979d9d72bc57dc6b0eb41b82a75fc3b7 | |
| parent | 39ac9e6c8bde34f78e7e520b04d7f2eae90e7795 (diff) | |
| download | fg21sim-963f6f4015c856f2f695f3634b47ed903ade5adf.tar.bz2 | |
clusters/main: Implement _identify_halos() to determine genuine halos
New configuration options 'extragalactic/halos/genuine_{emfacc,index}_th'
are added to set the thresholds.
| -rw-r--r-- | fg21sim/configs/config.spec | 5 | ||||
| -rw-r--r-- | fg21sim/extragalactic/clusters/main.py | 25 |
2 files changed, 30 insertions, 0 deletions
diff --git a/fg21sim/configs/config.spec b/fg21sim/configs/config.spec index fd45949..5a0731d 100644 --- a/fg21sim/configs/config.spec +++ b/fg21sim/configs/config.spec @@ -456,3 +456,8 @@ stream = option("stderr", "stdout", "", default="stderr") f_rc = float(default=0.1) # The slope parameter (i.e., beta). beta = float(default=0.6667) + + # The emissivity acceleration factor and spectral index thresholds for + # determining whether the halo is genuine/formed. + genuine_emfacc_th = float(default=100) + genuine_index_th = float(default=3.5) diff --git a/fg21sim/extragalactic/clusters/main.py b/fg21sim/extragalactic/clusters/main.py index 4e1f134..cfeaf80 100644 --- a/fg21sim/extragalactic/clusters/main.py +++ b/fg21sim/extragalactic/clusters/main.py @@ -93,6 +93,8 @@ class GalaxyClusters: sec = "extragalactic/halos" self.eta_b = configs.getn(sec+"/x_cr") + self.genuine_emfacc_th = configs.getn(sec+"/genuine_emfacc_th") + self.genuine_index_th = configs.getn(sec+"/genuine_index_th") if self.use_dump_halos_data and (not self.use_dump_catalog_data): self.use_dump_catalog_data = True @@ -387,6 +389,28 @@ class GalaxyClusters: logger.info("Calculated halo emissions.") + def _identify_halos(self): + """ + Determine the formation/genuineness of each radio halo. + + A halo is genuine if both its emissivity acceleration factor >= + genuine_emfacc_th and its spectral index <= genuine_index_th + at any frequency. + """ + logger.info("Identify the genuineness of radio halos ...") + emfacc_th = self.genuine_emfacc_th + index_th = self.genuine_index_th + n = 0 + for hdict in self.halos: + emfacc = hdict["emissivity_facc"] + index = hdict["spec_index"] + genuine = np.any((emfacc >= emfacc_th) & (index <= index_th)) + hdict["genuine"] = genuine + n += genuine + + logger.info("Identified %d (%.1f%%) genuine halos." % + (n, n*100/len(self.halos))) + def _dropout_halos(self): """ Considering that the (very) massive galaxy clusters are very rare, @@ -588,6 +612,7 @@ class GalaxyClusters: self._simulate_halos() self._calc_halos_emission() + self._identify_halos() self._dropout_halos() self._draw_halos() |