synthpop.modules.extinction.lallement

Extinction map from Lallement et al 2019, for dust within 3 kpc based on Gaia & 2MASS observations.

Extinction is given as ‘A0’, or total extinction at reference wavelength 5500 Angstroms.

The user may determine whether to integrate over the map individually for each star, or to integrate for the average sightline and interpolate for distances. The user can also adjust the dr used for extinction integration.

Publication DOI: 10.1051/0004-6361/201834695

Data file FTP: https://cdsarc.cds.unistra.fr/ftp/J/A+A/625/A135/

Classes

Lallement

Extinction map from Lallement et al. 2019

Module Contents

class synthpop.modules.extinction.lallement.Lallement(dr=0.001, per_sightline=True, **kwargs)

Bases: synthpop.modules.extinction._extinction.ExtinctionMap

Extinction map from Lallement et al. 2019

Attributes

dr=0.001float

step size for extinction integration in kpc

per_sightline=Trueboolean

calculate extinction integral once per sightline if True (faster) calculate extinciton integral individually per star if False (slower)

Methods

lallement_ext_func(l_deg, b_deg, dist):

get extinction value in map for list of star locations

extinction_in_map(l_deg, b_deg, dist):

equivalent to lallement_ext_func

extinction_map_name = 'Lallement'

ref_wavelength = 0.55

A_or_E_type = 'A0'

per_sightline = True

dr = 0.001

grid_dr = 0.005

grid_x_mid = 600

grid_y_mid = 600

grid_z_mid = 80

x_extent = 3.0

y_extent = 3.0

z_extent = 0.4

lallement_ext_func(l_deg, b_deg, dist)

Get extinction value from Lallement et al. (2019) map for an array of star positions.

Parameters

l_deg: ndarray [degrees]

galactic longitude

b_deg: ndarray [degrees]

galactic latitude

dist: ndarray [kpc]

radial distance from the Sun

Returns

extinction_value: ndarray [mag]

extinction at each star position defined as self.A_or_E_type

extinction_in_map(l_deg, b_deg, dist)

Estimates the extinction for a list of star positions.

Parameters

l_deg: ndarray [degrees]

galactic longitude

b_deg: ndarray [degrees]

galactic latitude

dist: ndarray [kpc]

radial distance from the Sun

Returns

extinction_value: ndarray [mag]

extinction at each star position defined as self.A_or_E_type