ar X iv : 0 80 6 . 21 85 v 1 [ as tr o - ph ] 1 3 Ju n 20 08 A Spectroscopically Unique Main Belt Asteroid : 10537 ( 1991 RY 16 ) Nicholas

A Spectroscopically Unique Main-belt Asteroid: 10537 (1991 Ry16)

We present visible and near-infrared reflectance spectra and interpreted surface mineralogy for asteroid 10537 (1991 RY16). The spectrum of this object is without precedent among the main-belt asteroids. A unique absorption band centered at 0.63 mm could be attributed to one of several mineralogies. Pronounced 1 and 2 mm absorption bands suggest that the composition of 10537 is a mixture of pyr...

ar X iv : 0 80 1 . 35 64 v 1 [ as tr o - ph ] 2 3 Ja n 20 08 Local Phase Space - Shaped by Chaos ?

ar X iv : 0 80 6 . 46 34 v 1 [ he p - ex ] 3 0 Ju n 20 08 LPHE 2008 - 05 June 30 , 2008 B 0 – B 0 MIXING

ar X iv : 0 80 6 . 17 12 v 1 [ as tr o - ph ] 1 0 Ju n 20 08 HI Cosmology at z = 0 : a Brief Review

Extragalactic HI astronomy is half century old. Its maturity dramatically increased in the 1970s, with the commissioning of new powerful facilities. Its contributions to Cosmology are important, from the observation of galaxy rotation curves that showed the presence of dark matter in galaxies, to the measurement of cosmological parameters and the mapping of the large scale structure of the Univ...

ar X iv : 0 80 6 . 32 35 v 1 [ m at h - ph ] 1 9 Ju n 20 08 A note on Størmer condition for decomposability of positive maps

We present a partial characterization of matrices in Mn(A) + satisfying the Størmer condition. Mathematical Subject Classification: Primary: 46L55 Secondary: 46L05