Measuring ultracool properties from the UKIDSS Large Area Survey
1 Departamento de Astronomia, Universidad de Chile, Camino el Observatorio 1515, Santiago, Chile
2 Centre for Astrophysics Research, University of Hertfordshire, College Lane, Hatfield, Hertfordshire, UK
3 Max Planck Institute for Astronomy, Knigstuhl, 17. 69117 Heidelberg, Germany
4 ALMA, Also de Cordova 3107, Vitacura, Santiago, Chile
5 Departamento de Fiscica y Astronomia, Facultad de Ciencias, Universidad de Valparaiso, Av. Gran Bretana 1111, Valparaiso, Chile
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We discuss the properties and of ultracool and brown dwarfs that can be measured from current large area surveys and how fundamental parameters, such as the mass function and formation history can be measured, describing our own first measurement of the formation history in the sub-stellar regime using data from the UKIDSS Large Area Survey.
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