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Searching for sub-stellar companions among nearby white dwarfs, through common proper motion

Published online by Cambridge University Press:  01 October 2007

M. Radiszcz  and
R. A. Méndez
M. Radiszcz
Affiliation:
Departamento de Astronomia, Universidad de Chile, Casilla 36-D, Santiago, Chile email: [email protected]
R. A. Méndez
Affiliation:
Departamento de Astronomia, Universidad de Chile, Casilla 36-D, Santiago, Chile email: [email protected]
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Abstract

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The purpose of this work is to do a systematic, deep search for sub-stellar objects orbiting nearby white dwarfs (WDs). The scientific interest spans testing specific predictions of models of common envelope phase, as well as providing constraints to planetary system evolution in advanced stages of its parent star. Additionally, we seek to explore the hypothesis about the origin of metal lines in hydrogen WDs, produced by the accretion of tidal disturbed asteroidal or cometary material. This could be linked to the presence of a planetary object. Here, we show preliminary results of our near-infrared astrometric project.

Keywords

astrometrybinaries: closestars: low-massbrown dwarfsstars: white dwarfs
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 3 , Symposium S248: A Giant Step: from Milli- to Micro-arcsecond Astrometry , October 2007 , pp. 116 - 117
Copyright
Copyright © International Astronomical Union 2008

References

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