Search Publications
The Vela pulsar in the near-infrared
Sollerman, J.; Lundqvist, P.; Shibanov, Yu. A. +1 more
We report on the first detection of the Vela pulsar in the near-infrared with the VLT/ISAAC in the Js and H bands. The pulsar magnitudes are Js=22.71+/-0.10 and H=22.04+/-0.16. We compare our results with the available multiwavelength data and show that the dereddened phase-averaged optical spectrum of the pulsar can be fitte…
L183 (L134N) Revisited. I. The very cold core and the ridge
Miville-Deschênes, M. -A.; Lagache, G.; Teyssier, D. +8 more
We report new 1.2 mm continuum observations of the
An XMM-Newton-based X-ray survey of pre-main sequence stellar emission in the L1551 star-forming complex
Micela, G.; Favata, F.; Giardino, G. +2 more
We present a study of the X-ray sources present in the nearby L1551 star forming region, based on a deep XMM-Newton observation complemented with Chandra data for the brightest sources. Most known pre-main sequence stars in the region have been detected, most of them with sufficient statistics to allow a detailed study of the temporal and spectral…
V, J, H and K imaging of the metal rich globular cluster NGC 6528. Reddening, metallicity, and distance based on cleaned colour-magnitude diagrams
Momany, Y.; Bedin, L. R.; Held, E. V. +6 more
New near-infrared observations of NGC 6528 are presented. The JHKs observations complement a previous HST/NICMOS data set by Ortolani et al. (\cite{ortolani01}), in that they sample a larger area, contain a more numerous sample of red giant stars, and include the K band. Also, archival HST data sets (separated by 6.093 years) were used …
Extragalactic globular clusters in the near infrared III. NGC 5846 and NGC 7192. Quantifying the age distribution of sub-populations
Minniti, D.; Hilker, M.; Kissler-Patig, M. +3 more
In this third paper of our series on near-IR and optical photometry of globular cluster systems in early-type galaxies we concentrate on the photometric results for NGC 5846 and NGC 7192, two group ellipticals, and on a first comparison between the globular cluster systems investigated so far. In NGC 5846 the colour-colour diagram shows clear bi-m…
The blue host galaxy of the red GRB 000418
Pian, E.; Palazzi, E.; Greiner, J. +25 more
We report on multi-band (UBVRIZJsKs) observations of the host galaxy of the April 18, 2000 gamma-ray burst. The Spectral Energy Distribution (SED) is analysed by fitting empirical and synthetic spectral templates. We find that: (i) the best SED fit is obtained with a starburst template, (ii) the photometric redshift is consis…
Abundances of Planetary Nebulae BD+30 3639 and NGC 6543
Pottasch, S. R.; Feibelman, W. A.; Bernard-Salas, J. +1 more
Infrared spectra taken with the Short Wavelength Spectrometer on board ISO and UV observations with IUE of planetary nebulae
Solar active regions: The footpoints of 1 MK loops
Del Zanna, G.
On-disc SOHO and TRACE observations of the footpoints of 1 MK quiescent loops in a solar active region are presented. These types of loops are long-lived and high-lying features that are best seen in the TRACE 173 Å passband, sensitive to 1 MK temperatures. SOHO/CDS data are used to show the clear association between the high-lying 1 MK coronal em…
Simultaneous observations of solar transition region blinkers and explosive events by SUMER, CDS and BBSO. Are blinkers, explosive events and spicules the same phenomenon?
Doyle, J. G.; Madjarska, M. S.
The SoHO discovery of the new ``blinker'' phenomena focused our study on the search of its relation to already known phenomena such as explosive events and spicules. The study was performed using a specially planned joint observing program involving the Coronal Diagnostic Spectrometer (CDS), Solar Ultraviolet Measurements of Emitted Radiation spec…
Investigating the role of plasma topography on chromospheric oscillations observed by TRACE
Judge, P. G.; McIntosh, S. W.; Fleck, B.
We present the results of an investigation into the interaction of the topographic structure of the solar chromospheric plasma with the wave modes manifesting themselves in the UV continua formed there. We show that there is a distinct correlation between the inferred plasma topography, the phase-differences between and suppression of oscillations…