Terrestrial and sub-Neptune planets are expected to form in the inner (less than 10 au)
regions of protoplanetary disks. Water plays a key role in their formation,–, although it is yet …

Context. Young circumstellar disks are the birthplaces of planets. Their study is of prime
interest to understand the physical and chemical conditions under which planet formation …

Newly forming protoplanets are expected to create cavities and substructures in young, gas-
rich protoplanetary disks,–, but they are difficult to detect as they could be confused with disk …

Abstract We report new Spitzer Space Telescope observations, using the IRAC and MIPS
instruments, of the young (~ 3 Myr) σ Orionis cluster. We identify 336 stars as members of the …

We present a new catalog of 108 Herbig Ae/Be candidate stars identified in the Pico dos
Dias Survey, together with 19 previously known candidates and four objects selected from …

Abstract Infrared~ 5-35 μm spectra for 40 solar mass T Tauri stars and 7 intermediate-mass
Herbig Ae stars with circumstellar disks were obtained using the Spitzer Space Telescope …

PDS 70 is so far the only young disk where multiple planets have been detected by direct
imaging. The disk has a large cavity when seen at submillimeter and near-infrared …

We present high-resolution H-band polarized intensity (FWHM= 0 farcs 1: 14 AU) and L'-
band imaging data (FWHM= 0 farcs 11: 15 AU) of the circumstellar disk around the weak …

Variations in molecular cloud environments have the potential to affect the composition and
structure of the circumstellar disks therein. To this end, comparative analyses of nearby star …

We have determined the rate of large accretion events in Class I and II young stellar objects
(YSOs) by comparing the all-sky digitized photographic plate surveys provided by …