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Age-dating a star-burst with GEMINI/CIRPASS observations of the core of M83
Knapen, J. H.; Sharp, R. G.; Ryder, S. D. +2 more
We present preliminary results from a set of near-IR integral field spectroscopic observations of the central, star-burst, regions of the barred spiral galaxy M83, obtained with CIRPASS on Gemini-S. We present maps in the Paβ and [Fe{II}] ,1.257 µm emission lines which appear surprisingly different. We outline the procedure in which we will …
Analysis of UBV photometry in selected area 133
Karataş, Y.; Bilir, S.; Karaali, S. +1 more
We interpret the de-reddened UBV data for the field SA 133 to deduce the stellar density and metallicity distribution functions. The logarithmic local space density for giants, D*(0)=6.40, and the agreement of the luminosity function for dwarfs and sub-giants with the one of Hipparcos confirms the empirical method used for their separat…
The central region of NGC 3077: ground-based photometry and age of bright `starlike' objects
Karachentsev, I. D.; Makarova, L. N.; Notni, P.
We present UBVI_C photometry of starlike objects in the central region of NGC 3077. The colour-colour and colour-magnitude diagrams of the objects are discussed. Many of the objects under consideration, starlike from the ground, are probably dense young star clusters (super star clusters, SSC). Ages spreading over ∼4 to ∼150 Myr are estimated for …
The close binary system SU Ind
Budding, E.; Zeilik, M.; Rhodes, M. +1 more
Photometric data on the southern mid-F type close eclipsing binary system SU Ind from the Carter Observatory (NZ) were examined, together with a light curve obtained from the Hipparcos Epoch Photometry (HEP) database. The system appears detached, although appreciably evolved from the Zero Age Main Sequence. The HEP period must be accurate for its …
Stellar kinematics in the centers of globular clusters
Gerssen, J.
The high central stellar densities in globular clusters provide a unique environment to study the fundamental dynamical process of two-body relaxation. This process is the main driver of the dynamical evolution in the center of a globular cluster and has a profound effect on the structure of the cluster and on its stellar environment. We have obta…
HST/FOS Eclipse mapping of IP Pegasi in outburst
Horne, K.; Saito, R. K.; Baptista, R.
IP Pegasi is a deeply eclipsing dwarf nova (Porb= 3.8 hr) which shows 1-2 weeks-long, ≃ 2 mag outbursts every 60-120 days. During outbursts, tidally induced spiral shocks form in its accretion disc as the disc expands and its outer parts feel more effectively the gravitational attraction of the companion star (Steeghs, Harlaftis & H…
X-ray and optical properties of X-ray sources in the 13hr XMM-Newton/Chandra deep survey
Page, M. J.; Sasseen, T.; Mason, K. O. +8 more
The 13hr XMM-Newton/Chandra deep survey is the first of two extremely deep XMM-Newton fields observed by the XMM-OM consortium. A 120 ks Chandra mosaic, covering 0.2 deg2, provides sensitive, confusion-free point source detection with sub-arcsecond positions, while the 200 ks XMM-Newton observation provides high quality X-ray spectrosco…
XMM-Newton observation of the galactic centre - evidence against the X-ray reflection nebulae model?
Costantini, E.; Hasinger, G.; Predehl, P. +1 more
We present preliminary results of a 50 ksec \XMM observation of the Galactic Centre. Due to the excellent spectral resolution of \XMM combined with its high throughput at energies even beyond 7 keV, the iron line complex could be resolved into individual components (neutral, ionized, both in Kalpha and Kbeta ) in the spectra of a number of sources…
The XMM-Newton serendipitous source catalogue
Pietsch, W.; Motch, C.; Boller, Th. +17 more
We describe the production, properties and scientific potential of the XMM-Newton catalogue of serendipitous X-ray sources. The first version of this catalogue is nearing completion and is planned to be released in early 2003.
The source content of low galactic latitude XMM-Newton surveys
Motch, C.; Guillout, P.; Herent, O.
We present results from a project conducted by the Survey Science Center of the XMM-Newton satellite and aiming at the identification and characterisation of serendipitous EPIC sources at low galactic latitudes. Deep multi-colour optical imaging and spectroscopic observations have been obtained in the framework of several observing campaigns carri…