Hostname: page-component-848d4c4894-nmvwc Total loading time: 0 Render date: 2024-06-16T08:55:10.204Z Has data issue: false hasContentIssue false
  • English
  • Français

Calibrating Ultracool Atmospheres with Benchmark Companions from WISE+2MASS

Published online by Cambridge University Press:  23 April 2012

Joana I. Gomes ,
David Pinfield ,
Avril Day-Jones ,
Hugh Jones ,
Ben Burningham ,
Federico Marocco ,
ZengHuan Zhang  and
Lieke van Spaandonk
Joana I. Gomes
Affiliation:
Centre for Astrophysics Research, University of Hertfordshire, College Lane AL10 9AB, Hatfield, United Kingdom email: j.gomes@herts.ac.uk
David Pinfield
Affiliation:
Centre for Astrophysics Research, University of Hertfordshire, College Lane AL10 9AB, Hatfield, United Kingdom email: j.gomes@herts.ac.uk
Avril Day-Jones
Affiliation:
Centre for Astrophysics Research, University of Hertfordshire, College Lane AL10 9AB, Hatfield, United Kingdom email: j.gomes@herts.ac.uk Departamento de Astronomia, Universidad de Chile, Santiago, Chile
Hugh Jones
Affiliation:
Centre for Astrophysics Research, University of Hertfordshire, College Lane AL10 9AB, Hatfield, United Kingdom email: j.gomes@herts.ac.uk
Ben Burningham
Affiliation:
Centre for Astrophysics Research, University of Hertfordshire, College Lane AL10 9AB, Hatfield, United Kingdom email: j.gomes@herts.ac.uk
Federico Marocco
Affiliation:
Centre for Astrophysics Research, University of Hertfordshire, College Lane AL10 9AB, Hatfield, United Kingdom email: j.gomes@herts.ac.uk
ZengHuan Zhang
Affiliation:
Centre for Astrophysics Research, University of Hertfordshire, College Lane AL10 9AB, Hatfield, United Kingdom email: j.gomes@herts.ac.uk
Lieke van Spaandonk
Affiliation:
Centre for Astrophysics Research, University of Hertfordshire, College Lane AL10 9AB, Hatfield, United Kingdom email: j.gomes@herts.ac.uk
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

The complexities of ultracool atmospheres are best confronted by observations of ultracool dwarfs (UCDs) with well known physical properties (luminosity, mass, Teff, log(g), [M/H]), so-called “benchmark objects.” We present two discoveries from a new WISE+2MASS search for benchmark wide companions to Hipparcos and Gliese stars. This survey combination provides a powerful tool to confirm new companions using color-magnitude and common proper motion selections, and also yield full NIR-MIR measurements of the ultracool emission. These primary companions are providing important constraints on the age and composition of the benchmark brown dwarf, and the new discoveries add to our growing population of benchmarks that is providing crucial tests of ultracool physics.

Keywords

ultracool dwarfsbinaries
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 7 , Symposium S282: From Interacting Binaries to Exoplanets: Essential Modeling Tools , July 2011 , pp. 482 - 483
Copyright
Copyright © International Astronomical Union 2012

References

Jameson, R. F., Casewell, S. L., Bannister, N. P., Lodieu, N., Keresztes, K., Dobbie, P. D. & Hodgkin, S. T. 2008, MNRAS, 384, 1399CrossRefGoogle Scholar
Johnson, J. A. & Apps, K. 2009, ApJ, 699, 933CrossRefGoogle Scholar
Marocco, F., Smart, R. L., Jones, H. R. A., Burningham, B., Lattanzi, M. G., Legget, S. K., Lucas, P. W., Tinney, C. G., Adamson, A., Evans, D. W., Lodieu, N., Murray, D. N., Pinfield, D. J. & Tamura, M. 2010, A&A, 524, 38Google Scholar
Pinfield, D. J., Jones, H. R. A., Lucas, P. W., Kendall, T. R., Folkes, S. L., Day-Jones, A. C., Chappelle, R. J., & Steele, I. A. 2006, MNRAS, 368, 1281CrossRefGoogle Scholar