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Behaviour of the Broadest DIBs as a Function of E(B–V)

Published online by Cambridge University Press:  21 February 2014

B. York ,
P. Sonnentrucker ,
L. M. Hobbs ,
D. G. York ,
S. D. Friedman ,
J. Dahlstrom ,
D. E. Welty ,
T. P. Snow  and
B. L. Rachford
B. York
Affiliation:
Space Telescope Science Institute, Baltimore, MD, USA e-mail: [email protected]
P. Sonnentrucker
Affiliation:
Space Telescope Science Institute, Baltimore, MD, USA e-mail: [email protected]
L. M. Hobbs
Affiliation:
University of Chicago, Chicago, IL, USA
D. G. York
Affiliation:
University of Chicago, Chicago, IL, USA
S. D. Friedman
Affiliation:
Space Telescope Science Institute, Baltimore, MD, USA e-mail: [email protected]
J. Dahlstrom
Affiliation:
Carthage College, Kenosha, WI, USA
D. E. Welty
Affiliation:
University of Chicago, Chicago, IL, USA
T. P. Snow
Affiliation:
Center for Astrophysics and Space Astronomy, University of Colorado, Boulder, CO, USA
B. L. Rachford
Affiliation:
Embry-Riddle Aeronautical University, Prescott, AZ, USA
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Abstract

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We present the first results of a dedicated search for Diffuse Interstellar Bands that have profiles with FWHM > 6 Å. Broad DIBs have been noticed in past surveys using averages of multiple sight lines (e.g. Jenniskens & Désert, 1994), but careful detection, measurement, and cataloguing for individual sight lines has not been done since the pioneering work of Herbig (1995). We have initiated an observing campaign using the Apache Point Observatory in order to obtain low-resolution spectra to search for such broad DIBs and monitor their behaviour from star to star. A first sample of 21 stars with 0.3 < E(B-V) < 3.3 mag, along with 15 matched low-reddening stars, were observed with the APO/DIS B400 (R ~ 450) and R300 (R ~ 1000) gratings to obtain spectra having S/N > 500.

Keywords

ISM: lines and bands
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 9 , Symposium S297: The Diffuse Interstellar Bands , May 2013 , pp. 138 - 140
Copyright
Copyright © International Astronomical Union 2014 

References

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