Spitzer Measurements of Atomic and Molecular Abundances in the Type IIP SN 2005af

Rubina Kotak; Peter Meikle; Monica Pozzo; Schuyler D. van Dyk; Duncan Farrah; Robert Fesen; Alexei V. Filippenko; Ryan J. Foley; Claes Fransson; Christopher L. Gerardy; Peter A. Höflich; Peter Lundqvist; Seppo Mattila; Jesper Sollerman; J. Craig Wheeler

doi:10.1086/509655

Spitzer Measurements of Atomic and Molecular Abundances in the Type IIP SN 2005af

Rubina Kotak¹, Peter Meikle², Monica Pozzo², Schuyler D. van Dyk³, Duncan Farrah⁴, Robert Fesen⁵, Alexei V. Filippenko⁶, Ryan J. Foley⁶, Claes Fransson⁷, Christopher L. Gerardy², Peter A. Höflich⁸, Peter Lundqvist⁷, Seppo Mattila⁹, Jesper Sollerman¹⁰, and J. Craig Wheeler¹¹

Published 2006 October 23 • © 2006. The American Astronomical Society. All rights reserved. Printed in U.S.A.
The Astrophysical Journal, Volume 651, Number 2 Citation Rubina Kotak et al 2006 ApJ 651 L117 DOI 10.1086/509655

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Author affiliations

¹ ESO, Karl-Schwarzschild Strasse 2, Garching-bei-München, D-85748, Germany

² Astrophysics Group, Imperial College London, Blackett Laboratory, Prince Consort Road, London SW7 2AZ, UK

³ Spitzer Science Center, 220-6, Pasadena, CA 91125

⁴ Department of Astronomy, Cornell University, 106 Space Sciences, Ithaca, NY 14853

⁵ Department of Physics and Astronomy, 6127 Wilder Laboratory, Dartmouth College, Hanover, NH 03755

⁶ Department of Astronomy, University of California, Berkeley, CA 94720-3411

⁷ Department of Astronomy, Stockholm University, AlbaNova, SE-10691 Stockholm, Sweden

⁸ Department of Physics, Florida State University, 315 Keen Building, Tallahassee, FL 32306-4350

⁹ Department of Physics and Astronomy, Queen's University Belfast, Belfast BT7 1NN, Northern Ireland

¹⁰ Dark Cosmology Centre, Niels Bohr Institute, University of Copenhagen, Juliane Maries Vej 30, 2100 Copenhagen Ø, Denmark

¹¹ Astronomy Department, University of Texas at Austin, Austin, TX 78712

Dates

Received 2006 August 30
Accepted 2006 September 25
Published 2006 October 23

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Abstract

We present results based on mid-infrared (3.6-30 μm) observations with the Spitzer Space Telescope of the nearby Type IIP supernova 2005af. We report the first ever detection of the SiO molecule in a Type IIP supernova. Together with the detection of the CO fundamental, this is an exciting finding as it may signal the onset of dust condensation in the ejecta. From a wealth of fine-structure lines we provide abundance estimates for stable Ni, Ar, and Ne that, via spectral synthesis, may be used to constrain nucleosynthesis models.

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