A Search for the 13175-A Infrared Diffuse Band in Dense Environments

Details A Search for the 13175-A Infrared Diffuse Band in Dense Environments A Search for the 13175-A Infrared Diffuse Band in Dense Environments

Jun 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994mnras.268..705a&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Vol. 268, NO. 3/JUN1, P. 705, 1994

Astronomy and Astrophysics

Astronomy

4

Ism: Abundances - Ism: Individual: Taurus Dark Cloud - Ism: Molecules - Infrared: Ism: Lines And Bands

Scientific paper

Models of ionized interstellar C60 predict a strong transition in the 1 .2-μm region, and two candidate bands have recently been detected in reddened stars. We have searched for the stronger of these bands (at 13 175 Å) in the Taurus dark cloud complex, to determine its response to the dark cloud environment. None of the three lines of sight studied (two near the cloud surface, one reaching Aν > 20 mag) gives rise to a detectable band; in one case, the equivalent width is a factor of order three below that predicted. Since such behaviour is also shown by the optical diffuse interstellar bands (DIBs), we suggest that the 13 175-Å band is a genuine DIB, but we caution against an automatic interpretation in terms of an ionic carrier.

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