▪ Abstract Dusty circumstellar disks in orbit around main-sequence stars were discovered in
1983 by the infrared astronomical satellite. It was the first time material that was not another …

Context. Since the discovery of its dusty disk in 1984, β Pictoris has become the prototype of
young early-type planetary systems, and there are now various indications that a massive …

We report new Spitzer 24 μm photometry of 76 main-sequence A-type stars. We combine
these results with previously reported Spitzer 24 μm data and 24 and 25 μm photometry from …

Stellar nucleosynthesis of heavy elements such as carbon allowed the formation of organic
molecules in space, which appear to be widespread in our Galaxy. The physical and …

Dusty debris disks around main-sequence stars are signposts for the existence of
planetesimals and exoplanets. From cross-correlating Hipparcos stars with the IRAS …

Abstract We have obtained Spitzer Space Telescope Infrared Spectrograph (IRS) 5.5-35 μm
spectra of 59 main-sequence stars that possess IRAS 60 μm excess. The spectra of five …

We describe calculations for the formation of icy planets and debris disks at 30-150 AU
around 1-3 M⊙ stars. Debris disk formation coincides with the formation of planetary …

We present 7 mm observations of the dusty disk surrounding the 10 Myr old pre-main-
sequence star CQ Tauri obtained at the Very Large Array with 0.8 arcsec resolution and 0.1 …

Over the past 10 years abundant evidence has emerged that many (if not all) stars are born
with circumstellar disks. Understanding the evolution of post-accretion disks can provide …

We present evidence of magnetically mediated disk accretion in Herbig Ae/Be stars.
Magnetospheric accretion models of Balmer and sodium profiles calculated with appropriate …