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VLT spectroscopy of globular cluster systems. II. Spectroscopic ages, metallicities, and [ α/Fe] ratios of globular clusters in early-type galaxies
Saglia, R. P.; Thomas, D.; Bender, R. +5 more
An analysis of ages, metallicities, and [ α/Fe] ratios of globular cluster systems in early-type galaxies is presented, based on Lick index measurements summarized in Puzia et al. (2004, A&A, 415, 123, Paper I of this series). In the light of calibration and measurement uncertainties, age-metallicity degeneracy, and the relative dynamic range …
The CME-flare relationship: Are there really two types of CMEs?
Vršnak, B.; Sudar, D.; Ruždjak, D.
We present a statistical analysis of 545 flare-associated CMEs and 104 non-flare CMEs observed in the heliocentric distance range 2-30 solar radii. We found that both data sets show quite similar characteristics, contradicting the concept of two distinct (flare/non-flare) types of CMEs. In both samples there is a significant fraction of CMEs showi…
INTEGRAL insight into the inner parts of the Galaxy. High mass X-ray binaries
Sunyaev, R.; Revnivtsev, M.; Lutovinov, A. +3 more
Since its launch INTEGRAL has devoted a significant fraction of its observing time to the Galactic plane region. We present the results of INTEGRAL observations of the inner spiral arms of the Galaxy (Norma, Scutum and Sagittarius) with attention to high mass X-ray binaries. The increased sensitivity of the survey and possibility to detect absorbe…
Hierarchical star formation in M 51: star/cluster complexes
Bastian, N.; Gieles, M.; Lamers, H. J. G. L. M. +1 more
We report on a study of young star cluster complexes in the spiral galaxy M 51. Recent studies have confirmed that star clusters do not form in isolation, but instead tend to form in larger groupings or complexes. We use HST broad and narrow band images (from both WFPC2 and ACS), along with BIMA-CO observations to study the properties and investig…
The lithium content of the Galactic Halo stars
Primas, F.; Charbonnel, C.
Thanks to the accurate determination of the baryon density of the universe by the recent cosmic microwave background experiments, updated predictions of the standard model of Big Bang nucleosynthesis now yield the initial abundance of the primordial light elements with unprecedented precision. In the case of ^7Li, the CMB+SBBN value is significant…
HS 2331+3905: The cataclysmic variable that has it all
Gänsicke, B. T.; Marsh, T. R.; Hagen, H. -J. +6 more
We report detailed follow-up observations of the cataclysmic variable HS 2331+3905, identified as an emission-line object in the Hamburg Quasar Survey. An orbital period of 81.08 min is unambiguously determined from the detection of eclipses in the light curves of HS 2331+3905. A second photometric period is consistently detected at P ≃ 83.38 min,…
EDisCS - the ESO distant cluster survey. Sample definition and optical photometry
Pelló, R.; White, S. D. M.; Bremer, M. +23 more
We present the ESO Distant Cluster Survey (EDisCS), a survey of 20 fields containing distant galaxy clusters with redshifts ranging from 0.4 to almost 1.0. Candidate clusters were chosen from among the brightest objects identified in the Las Campanas Distant Cluster Survey, half with estimated redshift z_est∼0.5 and half with z_est∼0.8. They were …
Disentangling the composite continuum of symbiotic binaries. I. S-type systems
Skopal, A.
We describe a method of disentangling the composite, 0.12-5 µm continuum of symbiotic binaries. The observed SED is determined by the IUE/HST archival spectra and flux-points corresponding to the optical UBVRI and infrared JHKLM photometric measurements. The modeled SED is given by superposition of fluxes from the cool giant, hot stellar sou…
Molecular hydrogen emission from protoplanetary disks
Nomura, H.; Millar, T. J.
We have modeled self-consistently the density and temperature profiles of gas and dust in protoplanetary disks, taking into account irradiation from a central star. Making use of this physical structure, we have calculated the level populations of molecular hydrogen and the line emission from the disks. As a result, we can reproduce the observed s…
Temperature and entropy profiles of nearby cooling flow clusters observed with XMM-Newton
Kaastra, J. S.; Tamura, T.; Piffaretti, R. +1 more
We investigate temperature and entropy profiles of 13 nearby cooling flow clusters observed with the EPIC cameras of XMM-Newton. When normalized and scaled by the virial radius the temperature profiles turn out to be remarkably similar. At large radii the temperature profiles show a clear decline starting from a break radius at ~0.1 rvir