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Physical properties of two low-luminosity mathsf {{vec z} ~ 1.9} galaxies behind the lensing cluster AC 114
Kneib, J. -P.; Pelló, R.; Lidman, C. +3 more
We present VLT/ISAAC near-infrared spectroscopy of two gravitationally-lensed z ~ 1.9 galaxies, A2 and S2, located behind the cluster AC 114. Thanks to large magnification factors, we have been successful in detecting rest-frame optical emission lines (from [O II]lambda 3727 to Hα+[N II]lambda 6584) in star-forming galaxies 1 to 2 mag fainter than…
ISOCAM-CVF spectroscopy of the circumstellar environment of young stellar objects
Eiroa, C.; André, P.; Alexander, R. D. +2 more
We present the results of a mid-infrared (5-16.5 mu m) imaging spectroscopy survey of Young Stellar Objects (YSOs) and their surrounding environment in four low-mass star formation regions: RCrA, rho Ophiuchi, Serpens and Chamaeleon I. This survey was performed using ISOCAM and its Circular Variable Filters (CVF) and observed 42 YSO candidates: we…
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…