Abstract
We present near infrared high angular resolution observations of G29–38 obtained at the ESO 3.6-meter telescope with the COME-ON-PLUS adaptive optics system. G29–38 is a nearby white dwarf exhibiting a mid-IR excess. This excess can possibly be attributed to the presence of a brown dwarf companion orbiting the white dwarf. Adaptive optics in the infrared appears to be the only possible method to detect the suspected low mass companion. At 2.2 µm, the white dwarf and the infrared excess are about equal in terms of magnitude (13.35) and under some reasonable hypotheses, the maximum separation between the two components could be of the order of 0.06”. Although this is half of the diffraction limit of a 3.6-meter telescope at 2.2 µm, super-resolution techniques and differential imaging (in J, H and K bands) should allow its detection. We present the results of the first observations.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
Barnbaum, C., Zuckerman, B. (1992): ApJ, 396, L31
Beuzit, J. -L., Rousset, G., Lena, P. et al.(1994): “Astronomical Adaptive Optics: III. The COME-ON-PLUS system”, A&A, in preparation
Hofmann, R., Blietz, M., Duhoux, P., Eckart, A., Krabbe, A., Rotaciuc, V. (1992): “SHARP and FAST: near infrared speckle and spectroscopy at MPE”, in Proc. ESO Conference on Progress in Telescope and Instrumentation Technologies, ed. by M.-H. Ulrich (ESO, Garching), pp. 617–620
Kleinmann et al. (1994): “Observational limits for Companions to G29–38”, ApJ, in press
Rousset, G., Madec, P. -Y., Beuzit, J. -L., Cuby, J. -G., Gigan, P., Lena, P., Rigaut, F., Boyer, C., Gaffard, J. -P., Richard, J.-C., Vittot, M., Gendron, E., Hubin, N., Merkle, F. (1992): “The COME-ON-PLUS Project: an Adaptive Optics System for a 4-meter Class Telescope”, in Proc. ESO Conference on Progress in Tele scope and Instrumentation Technologies, ed.by M.-H. Ulrich (ESO, Garching), pp. 403–406
Telesco, CM., Joy, M., Sisk, C. (1990): ApJ, 358, L17
Tokunaga, A. T., Becklin, E. E. (1990): ApJ, 358, L21
Zuckerman, B., Becklin, E. E. (1987): Nat, 330, 138
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 1995 Springer-Verlag Berlin Heidelberg
About this paper
Cite this paper
Beuzit, JL., Mariotti, JM., Duquennoy, A., Eckart, A., Perrier, C. (1995). Sub-arcsecond Imaging of G29–38 using Adaptive Optics. In: Tinney, C.G. (eds) The Bottom of the Main Sequence — And Beyond. ESO Astrophysics Symposia. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-49217-7_15
Download citation
DOI: https://doi.org/10.1007/978-3-540-49217-7_15
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-662-22482-3
Online ISBN: 978-3-540-49217-7
eBook Packages: Springer Book Archive