Approximate analytical description of the high latitude extinction

Alexei Nekrasov; Kirill Grishin; Dana Kovaleva; Oleg Malkov

doi:10.1140/epjs/s11734-021-00210-0

EPJ

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2022 Impact factor 2.8

Special Topics

Modeling, Machine Learning and Astronomy

Eur. Phys. J. Spec. Top. (2021) 230: 2193-2205
https://doi.org/10.1140/epjs/s11734-021-00210-0

Regular Article

Approximate analytical description of the high latitude extinction

Alexei Nekrasov¹^,2, Kirill Grishin¹^,2, Dana Kovaleva³ and Oleg Malkov³^d

¹ Physics Faculty, Moscow State University, 119992, Moscow, Russia
² Sternberg Astronomical Institute, M.V.Lomonosov Moscow State University, Universitetsky prospect 13, 119992, Moscow, Russia
³ Institute of Astronomy of the Russian Academy of Sciences, 119017, Moscow, Russia

^d malkov@inasan.ru

Received: 22 December 2020
Accepted: 22 June 2021
Published online: 7 July 2021

Abstract

The distribution of visual interstellar extinction has been mapped in selected areas over the Northern sky, using available LAMOST DR5 and Gaia DR2/EDR3 data. 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 values for stars with known parallaxes, as well as the total Galactic extinction in a given location in the sky.