Search Publications
Intensity variations in EIT shutterless mode: Waves or flows?
Berghmans, D.; van Driel-Gesztelyi, L.; Poedts, S. +1 more
On 11 July 2001 an EIT shutterless campaign was conducted which provided 120 high-cadence (68 s) 304 Å images of the north eastern quarter of the Sun. The most interesting feature seen in the data is an off-limb half loop structure along which systematic intensity variations are seen which appear to propagate from the top of the loop towards its f…
HST/WFPC2 morphologies and color maps of distant luminous infrared galaxies
Pelat, D.; Flores, H.; Hammer, F. +2 more
Using HST/WFPC2 imaging in F606W (or F450W) and F814W filters, we obtained the color maps in observed frame for 36 distant (0.4 < z < 1.2) luminous infrared galaxies (LIRGs, LIR(8-1000 µm) ≥ 1011 L⊙), with average star formation rates of ∼100 M⊙ yr-1. Stars and compact sources are …
VLT spectroscopy of globular cluster systems. I. The photometric and spectroscopic data set
Saglia, R. P.; Thomas, D.; Bender, R. +6 more
We present Lick line-index measurements of extragalactic globular clusters in seven early-type galaxies (NGC 1380, 2434, 3115, 3379, 3585, 5846, and 7192) with different morphological types (E-S0) located in field and group/cluster environments. High-quality spectra were taken with the FORS2 instrument at ESO's Very Large Telescope. ∼50% of our da…
Empirically Constrained Color-Temperature Relations. II. uvby
Grundahl, Frank; VandenBerg, Don A.; Bell, Roger A. +1 more
A new grid of theoretical color indices for the Strömgren uvby photometric system has been derived from MARCS model atmospheres and SSG synthetic spectra for cool dwarf and giant stars having -3.0<=[Fe/H]<=+0.5 and 3000<=Teff<=8000 K. At warmer temperatures (i.e., 8000<Teff<=40,000 K), this grid has been sup…
Four-spacecraft determination of magnetopause orientation, motion and thickness: comparison with results from single-spacecraft methods
Balogh, A.; Klecker, B.; Vaivads, A. +9 more
Available from http://www.copernicus.org/site/EGU/annales/22/4/1347.htm?FrameEngine=false;
Properties of the nuclei of Centaurs Chiron and Chariklo
Jorda, L.; Lamy, P.; Groussin, O.
We analyze visible, infrared, radio and spectroscopic observations of 2060 Chiron in a synthetic way to determine the physical properties of its nucleus. From visible observations performed from 1969 to 2001, we determine an absolute V magnitude for the nucleus of 7.28±0.08 with an amplitude of 0.16±0.03, implying a nearly spherical nucleus with a…
HETE Observations of the Gamma-Ray Burst GRB 030329: Evidence for an Underlying Soft X-Ray Component
Sakamoto, T.; Hurley, K.; Boer, M. +30 more
An exceptionally intense gamma-ray burst, GRB 030329, was detected and localized by the instruments on board the High Energy Transient Explorer satellite (HETE) at 11:37:14 UT on 2003 March 29. The burst consisted of two ~10 s pulses of roughly equal brightness and an X-ray tail lasting more than 100 s. The energy fluence in the 30-400 keV energy …
The ISOPHOT - MAMBO survey of 3CR radio sources: Further evidence for the unified schemes
Meisenheimer, K.; Siebenmorgen, R.; Krause, O. +9 more
We present the complete set of ISOPHOT observations of 3CR radio galaxies and quasars, which are contained in the ISO Data Archive, providing 75 mid- and far-infrared spectral energy distributions (SEDs) between 5 and 200 µm. For 28 sources they are supplemented with MAMBO 1.2 mm observations and for 15 sources with new submillimetre data fr…
Thermal and Nonthermal X-Rays from the Large Magellanic Cloud Superbubble 30 Doradus C
Ueno, Masaru; Koyama, Katsuji; Nakajima, Hiroshi +1 more
We report on the discovery of thermal and nonthermal X-rays from the shells of the superbubble (SB) 30 Dor C in the LMC. The X-ray morphology is a nearly circular shell with a radius of ~40 pc, which is bright on the northern and western sides. The spectra of the shells differ from region to region. The southern shell shows clear emission lines an…
Hypernovae/Gamma-Ray Bursts in the Galactic Center as Possible Sources of Galactic Positrons
Schanne, S.; Cordier, B.; Paul, J. +1 more
The observation of a strong and extended positron-electron line annihilation emission in the central regions of the Galaxy by the SPectrometer on the International Gamma-Ray Astrophysical Laboratory (INTEGRAL/SPI), consistent with the Galactic bulge geometry and without any counterpart in the gamma-ray range, neither at high energy nor in the 1809…