Unusually strong reddening in the dusty elliptical IC 4320

Details Unusually strong reddening in the dusty elliptical IC 4320 Unusually strong reddening in the dusty elliptical IC 4320

Nov 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983mnras.205..889w&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 205, Nov. 1983, p. 889-896. Research supported by the S

Astronomy and Astrophysics

Astronomy

13

Cosmic Dust, Elliptical Galaxies, Galactic Evolution, Interstellar Extinction, Astronomical Photometry, Data Reduction, Milky Way Galaxy

Scientific paper

Electronographic surface photometry in five wavebands has been used to determine the reddening law for the dust lane in the elliptical galaxy IC 4320 in the wavelength range 428 - 653 nm. The extinction varies linearly with inverse wavelength with a ratio of total to selective extinction R = 1.9, implying that the dust grains are smaller than in our Galaxy. This could be due to a different formation mechanism, or may result from gradual destruction of the dust in the time since it was last replenished by star formation - a period of approximately 5×108 yr is required. This may provide a means of dating these dust lane systems.

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