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First High-Angular Resolution L′ Images of the β Pictoris Debris Disc with the VLT / NaCo

Published online by Cambridge University Press:  06 January 2014

Julien Milli
Affiliation:
ESO, Alonso de Cordova 3107, Casilla 19001, Santiago 19, Chile, email: jmilli@eso.org IPAG, University Joseph Fourier, CNRS, BP 53, 38041, Grenoble, France
Dimitri Mawet
Affiliation:
ESO, Alonso de Cordova 3107, Casilla 19001, Santiago 19, Chile, email: jmilli@eso.org
Olivier Absil
Affiliation:
AGO, Université de Liège, 17 Allée du Six Août, B-4000 Liège, Belgium
Anne-Marie Lagrange
Affiliation:
IPAG, University Joseph Fourier, CNRS, BP 53, 38041, Grenoble, France
David Mouillet
Affiliation:
IPAG, University Joseph Fourier, CNRS, BP 53, 38041, Grenoble, France
Julien H. Girard
Affiliation:
ESO, Alonso de Cordova 3107, Casilla 19001, Santiago 19, Chile, email: jmilli@eso.org
Jean-Charles Augereau
Affiliation:
IPAG, University Joseph Fourier, CNRS, BP 53, 38041, Grenoble, France
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Abstract

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Imaging debris discs in the L′-band (3.8 μm) is a difficult task. Quasi-static speckles from imperfect optics prevail below 1″ whereas background emission is the dominant noise source beyond that separation and is much larger than at shorter wavelengths. We demonstrate here the potential of the newly commissioned AGPM coronograph on VLT/NaCo combined with advanced star and sky subtraction technique based on Principal Component Analysis, and we analyze the morphology of the β Pictoris disc.

Type
Contributed Papers
Copyright
Copyright © International Astronomical Union 2013 

References

Augereau, J. C., Lagrange, A. M., Mouillet, D., Papaloizou, J. C. B., & Grorod, P. A. 1999, A&A, 348, 557Google Scholar
Golimowski, D. A., Ardila, D. R., Krist, J. E., et al. 2006, AJ, 131, 3109CrossRefGoogle Scholar
Lagrange, A.-M., Boccaletti, A., Milli, J., et al. 2012, A&A, 542, A40Google Scholar
Marois, C., Lafrenière, D., Doyon, R., Macintosh, B., & Nadeau, D. 2006, ApJ, 641, 556CrossRefGoogle Scholar
Milli, J., Mouillet, D., Lagrange, A.-M., et al. 2012, A&A, 545, A111Google Scholar
Soummer, R., Pueyo, L., & Larkin, J. 2012, ApJ, 755, L28CrossRefGoogle Scholar
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First High-Angular Resolution L′ Images of the β Pictoris Debris Disc with the VLT / NaCo
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First High-Angular Resolution L′ Images of the β Pictoris Debris Disc with the VLT / NaCo
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