Astronomy and Astrophysics – Astrophysics
Scientific paper
May 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984a%26a...134..284l&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 134, no. 2, May 1984, p. 284-289.
Astronomy and Astrophysics
Astrophysics
120
H Lines, Hydrogen Recombinations, Infrared Spectroscopy, Interstellar Extinction, Black Body Radiation, Dwarf Stars, Electron Density (Concentration), H Ii Regions, Stellar Spectrophotometry
Scientific paper
Several hydrogen recombination lines have been measured in the range 1.6-4.6 microns in the direction the southern H II region G333.6 - 0.2, and the results are used to determine the extinction curve. The overall behavior of the curve as a function of wavelength is well described by a power-law function proportional to the -1.85 + or -0.05 power of the wavelength.This curve is not significantly affected by extinction variations in the beam and is the most precise measurement to date of the extinction curve in the near infrared. This result confirms that, for many practical purposes, the van de Hulst curve No. 15 can provide an adequate description of the IR extinction curve.
Landini Massimo
Moorwood Alan F. M.
Natta Antonella
Oliva Ernesto
Salinari Piero
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