An Extremely Carbon-rich, Extremely Metal-poor Star in the Segue 1 System

We report the analysis of high-resolution, high-S/N spectra of an extremely metal-poor, extremely C-rich red giant, Seg 1-7, in the Segue 1 system - described in the literature alternatively as an unusually extended globular cluster or an ultra-faint dwarf galaxy. The radial velocity of Seg 1-7 coincides precisely with the systemic velocity of Segue 1, and its chemical abundance signature of [Fe/H] = -3.52, [C/Fe] = +2.3, [N/Fe] = +0.8, [Na/Fe] = +0.53, [Mg/Fe] = +0.94, [Al/Fe] = +0.23 and [Ba/Fe] < -1.0 is similar to that of the rare and enigmatic class of Galactic halo objects designated CEMP-no (Carbon-rich, Extremely Metal-Poor and with no enhancement (over solar ratios) of heavy neutron-capture elements). This is the first star in a Milky Way ``satellite'' that unambiguously lies on the metal-poor, C-rich branch of the Aoki et al. (2007) bimodal distribution defined by field halo stars in the ([C/Fe], [Fe/H])-plane. Available data permit us only to identify Seg 1-7 as a member of an ultra-faint dwarf galaxy or as debris from the Sgr dwarf spheroidal galaxy. In either case, this demonstrates that at extremely low abundance, [Fe/H ] < -3.0, star formation and associated chemical evolution proceeded similarly in the progenitors of both the field halo and satellite systems. By extension, this is consistent with other recent suggestions the most metal-poor dwarf spheroidal and ultra-faint dwarf satellites were the building blocks of the Milky Way's outer halo.Comment: 18 pages, 2 figures, submitted to Astrophysical Journal Letter

Why the Cameron-Clegg coalition will be a shock to both Tory and Liberal Democrat voters

There has been intensive speculation about how Conservative and Liberal Democrat voters will react to the coalition government cemented in their name. Pippa Norris of Harvard University has the first stunning data, showing that in 2010 Tories predominantly put the far right parties as their second preference, and Liberal Democrat voters predominantly wanted Labour as their second choice

Exporting the Holy Land: artisans and merchant migrants in Ottoman-era Bethlehem

This article explores an aspect of Arab migration in the nineteenth century that is often retold in popular memory but rarely discussed in academic work: that of Bethlehem merchants and the “Holy Land” wares they sold. Beginning roughly in the 1850s, these travelling salesmen established trading connections in all corners of the globe, constituting one of the earliest manifestations of the wider movement of Arabic-speaking people away from the Ottoman Empire in the nineteenth and early twentieth centuries. To properly contextualize the emergence and significance of this merchant activity, the article firstly offers an account of how Bethlehem came to be the manufacturing center of a global industry in religious souvenirs. It then turns to the nineteenth-century merchants themselves, exploring their multi-directional trajectories in the nineteenth century. Through these twin dynamics of production and circulation, the article questions some of the commonly held assumptions about the nature of the nineteenth-century “Arab diaspora” or mahjar

Wurdi Youang: an Australian Aboriginal stone arrangement with possible solar indications

Wurdi Youang is an egg-shaped Aboriginal stone arrangement in Victoria, Australia. Here we present a new survey of the site, and show that its major axis is aligned within a few degrees of east-west. We confirm a previous hypothesis that it contains alignments to the position on the horizon of the setting sun at the equinox and the solstices, and show that two independent sets of indicators are aligned in these directions. We show that these alignments are unlikely to have arisen by chance, and instead the builders of this stone arrangement appear to have deliberately aligned the site on astronomically significant positions.Comment: Accepted by Rock Art Researc