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Reddening And The Extinction Law At High Galactic Latitude, Kristen A. Larson, D. C. B. Whittet
Reddening And The Extinction Law At High Galactic Latitude, Kristen A. Larson, D. C. B. Whittet
Physics & Astronomy
We present near-infrared (JHKL) photometry of 103 southern stars located behind translucent interstellar clouds at high Galactic latitude. Our data are combined with visual photometry and spectral type information from the literature in a detailed analysis of the wavelength dependence of interstellar extinction by dust in these high-latitude clouds. We investigate the shape of the near-infrared extinction curve and evaluate the total line-of-sight extinction ( AV) and ratio of total-to-selective extinction ( RV) in each line of sight. Sources of uncertainty in RV arising from photometric errors and spectral classification errors are carefully assessed …