Discovery of a Very Low Mass Triple with Late-M and T Dwarf Components: LP 704-48/SDSS J0006-0852AB
Adam J. Burgasser (UCSD), Christopher Luk (UCSD), Saurav Dhital (Vanderbilt/Boston University), Daniella Bardalez Gagliuffi (UCSD), Christine P. Nicholls (UCSD), L. Prato (Lowell Observatory), Andrew A. West (Boston University), Sebastien Lepine (AMNH)
http://arxiv.org/abs/1208.0352
LHS 2803B: A very wide mid-T dwarf companion to an old M dwarf identified from Pan-STARRS1
Niall R. Deacon (1,2), Michael C. Liu (2,3) Eugene A. Magnier (2), Brendan P. Bowler (2), Andrew W. Mann (2), Joshua A. Redstone (4), William S. Burgett (2), Ken C. Chambers (2), Klaus W. Hodapp (5), Nick Kaiser (2), Rolf-Peter Kudritzki (2), Jeff S. Morgan (2), Paul A. Price (6), John L. Tonry (2), Richard J. Wainscoat (2)
http://arxiv.org/abs/1208.0368
The very low mass multiple system LHS\,1070 -- a testbed for model atmospheres for the lower end of the main sequence
A. S. Rajpurohit, C. Reyle, M. Schultheis, Ch. Leinert, F. Allard, D. Homeier, T. Ratzka, P. Abraham, B. Moster, S. Witte, N. Ryde
http://arxiv.org/abs/1208.0452
Astrometric and photometric initial mass functions from the UKIDSS Galactic Clusters Survey: III Praesepe
S. Boudreault (1,2), N. Lodieu (1,2), N. R. Deacon (3), N. C. Hambly (4)
http://arxiv.org/abs/1208.0466
A search for mass segregation of stars and brown dwarfs in ρ Ophiuchi
Richard J. Parker (1), Thomas Maschberger (2), Catarina Alves de Oliveira (3)
二つの指標でmass segregationを計り、inversely mass segregation、つまりanti-clusteredである可能性を示唆した。ただ、ρ Ophは減光量が大きいので天体をとり逃している可能性もある。
http://arxiv.org/abs/1208.0005
