Discs of gas and dust around million-year-old stars are a by-product of the star formation
process and provide the raw material to form planets. Hence, their evolution and dispersal …

Circumstellar dust exists around several hundred main sequence stars. For the youngest
stars, that dust could be a remnant of the protoplanetary disk. Mostly it is inferred to be …

We have analyzed nearly all images of the Taurus star-forming region at 3.6, 4.5, 5.8, 8.0,
and 24 μm that were obtained during the cryogenic mission of the Spitzer Space Telescope …

Aims. We study the evolution of circumstellar disks in 22 young (1 to 100 Myr) nearby (within
500 pc) associations over the entire mass spectrum using photometry covering from the …

We present the results of a mid-infrared survey of 11 outer Galaxy massive star-forming
regions and 3 open clusters with data from the Wide-field Infrared Survey Explorer (WISE) …

ABSTRACT We present new Spitzer Space Telescope observations of stars in the young (∼
5 Myr) γ Velorum stellar cluster. Combining optical and 2MASS photometry, we have …

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 24 μm and 70 μm Multiband Imaging Photometer for Spitzer (MIPS)
observations of 70 A through M-type dwarfs with estimated ages from 8 Myr to 1.1 Gyr, as …

The protoplanetary disks seen around Herbig Ae stars eventually dissipate leaving just a
tenuous debris disk, comprised of planetesimals and the dust derived from them, as well as …

The lifetime of isolated protoplanetary disks is thought to be set by the combination of
viscous accretion and photoevaporation driven by stellar high-energy photons …