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Probing the Local Bubble with Diffuse Interstellar Bands

Published online by Cambridge University Press:  21 February 2014

A. Farhang ,
H. G. Khosroshahi ,
A. Javadi  and
J. van Loon
A. Farhang
Affiliation:
School of Astronomy, Institute for Research in Fundamental Sciences (IPM), P.O. Box 19395-5746, Tehran, Iran email: [email protected]
H. G. Khosroshahi
Affiliation:
Department of Physics, Sharif University of Technology, P. O. Box 11365-9161, Tehran, Iran
A. Javadi
Affiliation:
Department of Physics, Sharif University of Technology, P. O. Box 11365-9161, Tehran, Iran
J. van Loon
Affiliation:
Astrophysics Group, Lennard-Jones Laboratories, Keele University, Staffordshire ST5 5BG
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Abstract

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The Sun is located inside an enormous local cavity filled with a million degree, ionized hydrogen gas and surrounded by a wall of dense and cold gas, this cavity is known as the Local Bubble (LB). Since the tempreture of Local Bubble is high, the typical singly-ionized atoms or molecules can not survive at this high tempreture. To overcome this problem we should probe the Local Bubble using species which survive under this condition so we have done a whole sky survey in north hemisphere by observing absorptions in the Diffuse Interstellar Bands (DIBs) for sight-lines with distance >300 pc. We have done 30 nights observation and have observed 473 bright stars. We found that the correlations between 5780 Å DIBs and Na I D doublets inside of the LB is much more than carriers outside of the LB.

Keywords

ISM: moleculesISM: structureISM: lines and bands
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 9 , Symposium S297: The Diffuse Interstellar Bands , May 2013 , pp. 84 - 88
Copyright
Copyright © International Astronomical Union 2014 

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