• Publications
  • Influence
Incidence and survival of remnant disks around main-sequence stars
We present photometric ISO 60 and 170 um measurements, complemented by some IRAS data at 60 ${\mu\textrm{m}}$, of a sample of 84 nearby main-sequence stars of spectral class A, F, G and K in order to
Dust in starburst nuclei and ULIRGs - SED models for observers
Aims. We provide a library of some 7000 SEDs for the nuclei of starburst and ultra luminous galaxies. Its purpose is to quickly ob tain estimates of the basic parameters, such as luminosity, size and
Discovery of 10 μm silicate emission in quasars : Evidence of the agn unification scheme
According to the unified scheme, AGN are surrounded by a dust-torus, and the observed diversity of AGN properties results from the different orientations relative to our line of sight. The strong
CRIRES: a high-resolution infrared spectrograph for ESO's VLT
CRIRES is a cryogenic, pre-dispersed, infrared echelle spectrograph designed to provide a resolving power lambda/(Delta lambda) of 105 between 1 and 5mu m at the Nasmyth focus B of the 8m VLT unit
The Role of Dust in the Formation of Stars
I Ground-Based Observations of Young Stellar Objects.- High-Angular Resolution Near-Infrared Observations of the Circumstellar Environment of Young Stellar Objects.- Submillimeter Dust Continuum
ISOCAM survey and dust models of 3CR radio galaxies and quasars
We present a survey of all 3CR sources imaged with ISOCAM onboard the Infrared Space Observatory (ISO) . The sample consists mostly of radio-loud active galactic nuclei (AGN). For each source, we
A 25 micron search for Vega-like disks around main-sequence stars with ISO
We present an ISO 25 m photometric survey of a sample of 81 nearby main-sequence stars in order to determine the incidence of \warm" dust disks. All stars were detected by ISO. We used an empirical
Mid-infrared spectral evidence for a luminous dust enshrouded source in Arp 220
We have re-analyzed the 6-12 µm ISO spectrum of the ultra-luminous infrared galaxy Arp 220 with the conclusion that it is not consistent with that of a scaled up version of a typical starburst.
Disappearance of stellar debris disks around main-sequence stars after 400 million years
Almost 5 billion years ago, the Sun formed in a local contraction of a cloud of molecular gas. A rotating disk of gas and dust is believed to have fed material onto the proto-Sun for the first few