Astronomy and Astrophysics

The distribution of interstellar extinction has been mapped over the whole sky, using all available spectral and photometric data.The colour excess distribution is modelled as a function of galactic latitude, longitude and distance within about 1 kpc from the Sun.The model was used to predict the reddened Tycho and Johnson (B -V ) colours, with the associated accuracy, from HD or MK spectral type and one magnitude (B or V ), for stars without photoelectric photometry.This model is of special interest at intermediate and high galactic latitudes where colour excesses cannot be obtained from early type stars.

# Stellar, planetary, and galactic studies # Physics and Astronomy # Astrophysics and Star Formation Studies # Astronomy and Astrophysical Research

National Research Council (1988). "Astronomy and Astrophysics". National Academies Press eBooks. https://doi.org/10.17226/750