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A search for lithium in metal-poor L dwarfs
N. Lodieu, A. J. Burgasser, Y. Pavlenko +1
The aim of the project is to search for lithium in absorption at 6707.8 Angstroms to constrain the nature and the mass of the brightest low-metallicity L-type dwarfs (refered to as…
PHL 1445: An eclipsing cataclysmic variable with a substellar donor near the period minimum
M. J. McAllister, S. P. Littlefair, I. Baraffe +14
We present high-speed, three-colour photometry of the eclipsing dwarf nova PHL 1445, which, with an orbital period of 76.3 min, lies just below the period minimum of ~82 min for ca…
The doubly eclipsing quintuple low-mass star system 1SWASP J093010.78+533859.5
M. E. Lohr, A. J. Norton, E. Gillen +6
Our discovery of 1SWASP J093010.78+533859.5 as a probable doubly eclipsing quadruple system containing a contact binary with P~0.23 d and a detached binary with P~1.31 d was announ…
Comparisons between different techniques for measuring mass segregation
Richard J. Parker, Simon P. Goodwin
We examine the performance of four different methods which are used to measure mass segregation in star-forming regions: the radial variation of the mass function $\mathcal{M}_{\rm…