Approximate analytical description of the high latitude extinction

• DOI: 10.1140/epjs/s11734-021-00210-0
• Publication Date: 2021-07-07T16:34:31Z
• Authors: Alexei Nekrasov; Kirill Grishin; Dana Kovaleva; Oleg Malkov
• Keywords: Astrophysics of Galaxies (astro-ph.GA); 0103 physical sciences; FOS: Physical sciences; Astrophysics - Astrophysics of Galaxies; 01 natural sciences

18 pages, 33 figures, accepted by EPJ<br/>The distribution of visual interstellar extinction $A_V$ has been mapped in selected areas over the Northern sky, using available LAMOST DR5 and Gaia DR2/EDR3 data. $A_V$ was modelled as a barometric function of galactic latitude and distance. The function parameters were then approximated by spherical harmonics. The resulting analytical tridimensional model of the interstellar extinction can be used to predict $A_V$ values for stars with known parallaxes, as well as the total Galactic extinction in a given location in the sky.<br/>