The globular cluster system of a typical spheroidal galaxy makes up about 0.25% of the total galaxy mass (McLaughlin 1999). This is roughly the same mass fraction as contained in the nuclear star cluster (or stellar nucleus) present in most nearby low-mass galaxies. Motivated by this “coincidence”, this Letter discusses a scenario in which globular clusters of present-day galaxies are the survi...

We present a catalog of 99 candidate clusters and groups of galaxies in the redshift range 0:1 < zphot < 1:3 discovered in the Spitzer FLS. The clusters are selected by their Rc 3:6 m galaxy color-magnitude relation using the cluster red-sequence algorithm. Using this cluster sample, we compute the 3.6, 4.5, 5.8, and 8:0 m cluster LFs. Similar to previous studies, we find that for the bands tha...

The nature of star formation and Type Ia supernovae (SNIa) in galaxies in the field and in rich galaxy clusters are contrasted by juxtaposing the build-up of heavy metals in the universe inferred from observed star formation and supernovae rate histories with data on the evolution of Fe abundances in the intracluster medium (ICM). Models for the chemical evolution of Fe in these environments ar...

High resolution, 1.1, 1.6, and 2.2 μm imaging of the luminous infrared galaxy NGC 6090 obtained with NICMOS of the Hubble Space Telescope are presented. These new observations are centered on the two nuclei of the merger, and reveal the spiral structure of the eastern galaxy and the amorphous nature of the western galaxy. The nuclear separation of 3.2 kpc (H0 = 75 kms −1 Mpc) indicates that NGC...

Recent observations by the Hubble Space Telescope show that spirals make up to 50% of the galaxies in clusters at redshift z ∼ 0.5 (Dressler et al. 1997; Ellis 1998). Spectroscopic evidence suggests bursts of recent, or even current, star formation. This picture is drastically different from the nearby clusters, populated mostly by featureless elliptical or S0 galaxies. The change is due to the...

Using broadband optical imaging and Chandra X-ray data for a sample of 46 cluster central dominant galaxies (CDGs), we investigate the connection between star formation, the intracluster medium (ICM), and the central active galactic nucleus (AGN). We report the discovery of a remarkably sharp threshold for the onset of star formation that occurs when the central cooling time of the hot atmosphe...

Abell 2256 is a nearby (z ≈ 0.06), rich cluster of galaxies with fascinating observed properties across a range of wavelengths. Long believed to represent a cluster merger, recent X-ray and optical results have suggested that in addition to the primary cluster and subcluster there is evidence for a third, poorer system. We present wide-field, high sensitivity 1.4 GHz VLA radio observations of A...

We discuss a correlation between star formation activity (SFA) and luminosity of star-forming galaxies at intermediate redshifts of 0.2 ≤ z ≤ 0.6 in both cluster and field environments. Equivalent width (EW) of [Oii] is used for measurement of the SFA, and R-band absolute magnitude, MR, for the luminosity. In lessluminous (MR > ∼ − 20.7) galaxies, we find : (1) the mean EW([Oii]) of cluster gal...

Super star clusters (SSCs) are the most extreme star forming environments in the local universe. Packed with massive stars, these clusters have a major impact on the energetics and morphology of galaxies. Massive stars ionize the interstellar medium and power the infrared radiation of dust, and their stellar winds and supernovae release mechanical energy that can trigger further star formation....

Abstract. Interacting galaxies like the famous Antennae (NGC 4038/4039) or Stephan’s Quintet (HCG 92) show considerable star forming activity in their tidal arms. High resolution images (e.g. from HST-observations) indicate that these regions consist of up to hundreds of massive stellar clusters or tidal dwarf galaxies (TDG). In this paper we want to investigate the future fate of these cluster...