The Diffuse Interstellar Line at 4430A

Details The Diffuse Interstellar Line at 4430A The Diffuse Interstellar Line at 4430A

Jan 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981a%26a....94...16t&link_type=abstract

Astronomy and Astrophysics, Vol. 94, P. 16, 1981

Astronomy and Astrophysics

Astrophysics

13

Scientific paper

Photoelectric scans of the strongest diffuse line at 4430 Å were studied in the spectra of 34 early-type stars. The error analysis shows that in spite of the well-known correlation of Wλ with EB-V both observables cannot be directly physically related. Instead of that a strict relation is found between the two interstellar features at λ4430 and λ6284 implying that the same substance is responsible for both features. A circumstellar contribution to the equivalent width of λ4430 must be assumed for early B-type supergiants Ia.

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