ar X iv : a st ro - p h / 99 03 32 4 v 1 2 2 M ar 1 99 9 HST Imaging of Globular Clusters in the Edge – on Spiral

ar X iv : a st ro - p h / 99 06 48 8 v 1 2 9 Ju n 19 99 Young Globular Clusters

Star formation in starbursts appears to be biased toward compact clusters, with up to 20% of all stars formed in them. Observations with HST show that many of these clusters have luminosities (−9 > M V > −16), UBVI colors, and half-light radii (R eff ≈ 3 pc) consistent with their being young globular clusters (YGC). Although we know little about the long-term stability of the youngest clusters ...

ar X iv : a st ro - p h / 99 03 43 7 v 1 2 9 M ar 1 99 9 Striking Photospheric Abundance Anomalies in Blue Horizontal - Branch Stars in Globular Cluster

High-resolution optical spectra of thirteen blue horizontal-branch (BHB) stars in the globular cluster M13 show enormous deviations in element abundances from the expected cluster metallicity. In the hotter stars (Teff > 12000K), helium is depleted by factors of 10 to 100 below solar, while iron is enhanced to three times the solar abundance, two orders of magnitude above the canonical metallic...

ar X iv : a st ro - p h / 99 11 43 8 v 1 2 3 N ov 1 99 9 H 2 molecules and cold clouds in cooling flow clusters †

ar X iv : a st ro - p h / 98 03 21 2 v 1 1 8 M ar 1 99 8 Anisotropy of CMB & Cosmological Model

In this brief review I will touch upon the main points and trends of observational and theoretical cosmology, that influence and change today our understanding of the Universe.

ar X iv : a st ro - p h / 99 02 06 2 v 1 4 F eb 1 99 9 SOURCES OF RELATIVISTIC JETS IN THE GALAXY