Unveiling the distant Universe: Characterizing z≥9z\ge9 Galaxies in the first epoch of COSMOS-Web

We report the identification of 15 galaxy candidates at $z\ge9$ using the initial COSMOS-Web JWST observations over 77 arcmin$^2$ through four NIRCam filters (F115W, F150W, F277W, F444W) with an overlap with MIRI (F770W) of 8.7 arcmin$^2$. We fit the sample using several publicly-available SED fitting and photometric redshift codes and determine their redshifts between $z=9.3$ and $z=10.9$ ($\langle z\rangle=10.0$), UV-magnitudes between M$_{\rm UV}$ = $-$21.2 and $-$19.5 (with $\langle$M$_{\rm UV}\rangle=-20.2$) and rest-frame UV slopes ($\langle \beta\rangle=-2.4$). These galaxies are, on average, more luminous than most $z\ge9$ candidates discovered by JWST so far in the literature, while exhibiting similar blue colors in their rest-frame UV. The rest-frame UV slopes derived from SED-fitting are blue ($\beta\sim$[$-$2.0, $-$2.7]) without reaching extremely blue values as reported in other recent studies at these redshifts. The blue color is consistent with models that suggest the underlying stellar population is not yet fully enriched in metals like similarly luminous galaxies in the lower redshift Universe. The derived stellar masses with $\langle \log_{\rm 10} ($M$_\star/$M$_\odot)\rangle\approx8-9$ are not in tension with the standard $\Lambda$CDM model and our measurement of the volume density of such UV luminous galaxies aligns well with previously measured values presented in the literature at $z\sim9-10$. Our sample of galaxies, although compact, are significantly resolved.Comment: Submitted to Ap

Peace in its Wake? The 2004 Tsunami and Internal Conflict in Indonesia and Sri Lanka

Almost every recent natural disaster that has occurred within a zone of conflict has been followed by expressions of hope from both diplomats and journalists that the disaster might somehow lead to peace. In order to assess whether the concept of “disaster diplomacy” has any merit, more systematic comparative research is needed, contrasting cases where disaster diplomacy seems to have been present with cases where it has not. As a step in this direction, this article explores the differing outcomes with respect to the separatist conflicts in Indonesia and Sri Lanka that followed the 2004 tsunami. In each of these cases, the tsunami provided an opportunity for separatist groups to supply critical public and private relief goods and thereby send a powerful signal about the functional legitimacy of their respective claims to autonomy. In this way, the tsunami affected the separatists’ relative bargaining strength, creating an atmosphere more inclined toward peace in Indonesia and renewed civil war in Sri Lanka. The differing narratives suggest that the world pay more attention to post-disaster conflict zones given their positive and negative dynamic potential