diff options
Diffstat (limited to 'fg21sim')
| -rw-r--r-- | fg21sim/configs/10-galactic.conf.spec | 12 | ||||
| -rw-r--r-- | fg21sim/galactic/freefree.py | 16 |
2 files changed, 18 insertions, 10 deletions
diff --git a/fg21sim/configs/10-galactic.conf.spec b/fg21sim/configs/10-galactic.conf.spec index b082a5d..116586f 100644 --- a/fg21sim/configs/10-galactic.conf.spec +++ b/fg21sim/configs/10-galactic.conf.spec @@ -62,6 +62,18 @@ # The unit of the above dust map (e.g., "MJy/sr") dustmap_unit = string(default=None) + # Effective dust fraction in the LoS actually absorbing Halpha + dust_fraction = float(default=0.33, min=0.1, max=1.0) + + # Halpha absorption threshold: + # When the dust absorption goes rather large, the true Halpha + # absorption can not well determined. This configuration sets the + # threshold below which the dust absorption can be well determined, + # while the sky regions with higher absorption are masked out due + # to unreliable absorption correction. + # Unit: [mag] + halpha_abs_th = float(default=1.0) + # The electron temperature assumed for the ionized interstellar medium # that generating H{\alpha} emission. # Unit: [K] diff --git a/fg21sim/galactic/freefree.py b/fg21sim/galactic/freefree.py index 2ea193c..9c9424f 100644 --- a/fg21sim/galactic/freefree.py +++ b/fg21sim/galactic/freefree.py @@ -75,6 +75,8 @@ class FreeFree: self.dustmap_path = self.configs.get_path(comp+"/dustmap") self.dustmap_unit = au.Unit( self.configs.getn(comp+"/dustmap_unit")) + self.f_dust = self.configs.getn(comp+"/dust_fraction") + self.halpha_abs_th = self.configs.getn(comp+"/halpha_abs_th") # [mag] self.Te = self.configs.getn(comp+"/electron_temperature") # [K] self.prefix = self.configs.getn(comp+"/prefix") self.save = self.configs.getn(comp+"/save") @@ -117,29 +119,23 @@ class FreeFree: return # logger.info("Correct H[alpha] map for dust absorption") - # Effective dust fraction in the LoS actually absorbing Halpha - f_dust = 0.33 - logger.info("Effective dust fraction: {0}".format(f_dust)) - # NOTE: + logger.info("Effective dust fraction: {0}".format(self.f_dust)) # Mask the regions where the true Halpha absorption is uncertain. # When the dust absorption goes rather large, the true Halpha # absorption can not well determined. - # Therefore, the regions where the calculated Halpha absorption - # greater than 1.0 mag are masked out. - halpha_abs_th = 1.0 # Halpha absorption threshold, unit: [ mag ] # Corresponding dust absorption threshold, unit: [ MJy / sr ] - dust_abs_th = halpha_abs_th / 0.0462 / f_dust + dust_abs_th = self.halpha_abs_th / 0.0462 / self.f_dust logger.info("Dust absorption mask threshold: " + "{0:.1f} MJy/sr ".format(dust_abs_th) + "<-> H[alpha] absorption threshold: " + - "{0:.1f} mag".format(halpha_abs_th)) + "{0:.1f} mag".format(self.halpha_abs_th)) mask = (self.dustmap.data > dust_abs_th) self.dustmap.data[mask] = np.nan fp_mask = 100 * mask.sum() / self.dustmap.data.size logger.warning("Dust map masked fraction: {0:.1f}%".format(fp_mask)) # halphamap_corr = (self.halphamap.data * - 10**(self.dustmap.data * 0.0185 * f_dust)) + 10**(self.dustmap.data * 0.0185 * self.f_dust)) self.halphamap.data = halphamap_corr self._dust_corrected = True logger.info("Done dust absorption correction") |