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Signals embedded in the radial velocity noise: Periodic variations in the tau Ceti velocities
(2013-03)
Context. The abilities of radial velocity exoplanet surveys to detect the lowest-mass extra-solar planets are currently limited by a combination of instrument precision, lack of data, and “jitter”. Jitter is a general term ...
Benchmark low-mass objects in Moving Groups
(EDP Sciences, 2013)
In order to compile a sample of ultracool dwarfs that will serve as benchmarks for testing theoretical formation and evolutionary models, we selected low-mass cool (>M7) objects that are potentially members of five known ...
A 2 epoch proper motion catalogue from the UKIDSS Large Area Survey
(EDP Sciences, 2013)
The UKIDSS Large Area Survey (LAS) began in 2005, with the start of the UKIDSS program as a 7 year effort to survey roughly 4000 square degrees at high galactic latitudes in Y, J, H and K bands. The survey also included a ...
Status of the Calan-Hertfordshire Extrasolar Planet Search
(EDP Sciences, 2013)
In these proceedings we give a status update of the Calan-Hertfordshire Extrasolar Planet Search, an international collaboration led from Chile that aims to discover more planets around super metal-rich and Sun-like stars, ...
Red Optical Planet Survey : A radial velocity search for low mass M dwarf planets
(EDP Sciences, 2013)
We present radial velocity results from our Red Optical Planet Survey (ROPS), aimed at detecting low-mass planets orbiting mid-late M dwarfs. The similar to 10 ms(-1) precision achieved over 2 consecutive nights with the ...
Periodic variability of spotted M dwarfs in WTS
(EDP Sciences, 2013)
We present an analysis of the photometric variability of M dwarfs in the WFCAM Transit Survey, selected from spectral types inferred by their WTS and SDSS colours, with periods detected using a Lomb-Scargle Periodogram ...
Measuring ultracool properties from the UKIDSS Large Area Survey
(EDP Sciences, 2013)
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 ...
Purple dwarfs : New L subdwarfs from UKIDSS and SDSS
(EDP Sciences, 2013)
The first L subdwarf was a discovered only ten years ago. Less than ten L subdwarfs been published in the literature to date. Metal-poor ultracool atmospheres has not been well understood. Halo mass function cross substellar ...