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A 3-D mid-infrared view of the central parsec

Published online by Cambridge University Press:  22 May 2014

J. Moultaka ,
A. Eckart ,
K. Mužić  and
N. Sabha
J. Moultaka
Affiliation:
Université de Toulouse III - CNRS - IRAP, Observatoire Midi-Pyrénées 14, Avenue Edouard Belin 31400 Toulouse, France email: jihane.moultaka@irap.omp.eu
A. Eckart
Affiliation:
I. Physikalisches Institut, Universität zu Köln, Zülpicher Str. 77, 50937 Köln, Germany Max Planck Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, Germany
K. Mužić
Affiliation:
ESO, Alonso de Cordova 3107, Vitacura, Casilla 19, Santiago, 19001, Chile
N. Sabha
Affiliation:
I. Physikalisches Institut, Universität zu Köln, Zülpicher Str. 77, 50937 Köln, Germany
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Abstract

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We present a mid-infrared 3D view of the central parsec using ISAAC spectrograph (ESO/VLT) with its spectroscopic mode. We mapped the central parsec in L- and M-bands by using 27 and 21 slit positions, respectively, that allowed us to build two data cubes of the region in these spectral domains. We also use an original method to distinguish the contribution of the foreground extinction to the absorbed spectra from that of the local extinction in both wavelength ranges. We find that there are residual water and CO ices in the central parsec as well as hydrocarbons and gaseous CO implying very low temperatures of the order of tens of Kelvin in the local environment of Sgr A*.

Keywords

Galaxy: center — infrared: ISM — ISM: molecules
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 9 , Symposium S303: The Galactic Center: Feeding and Feedback in a Normal Galactic Nucleus , October 2013 , pp. 199 - 201
Copyright
Copyright © International Astronomical Union 2014 

References

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