TY - GEN
T1 - On circumstellar disks
T2 - Spitzer identifies two possible evolutionary paths
AU - Teixeira, Paula Stella
AU - Lada, Charles J.
AU - Marengo, Massimo
AU - Lada, Elizabeth
PY - 2010
Y1 - 2010
N2 - Multi-wavelength surveys have vastly improved our understanding of many astrophysical objects, in particular, circumstellar disks. We present our results for the disk population of the young cluster NGC 2264. Our study was based on data obtained with the Infrared Array Camera (IRAC)and the Multiband Imaging Photometer on board the Spitzer Space Telescope combined with previously published optical data. We divide the disk population into 3 classes based on their spectral energy distribution shapes: optically thick disks, homologously depleted anemic disks, and radially depleted transition disks. We find that there are two distinct evolutionary paths for disks: a homologous one, where the disk emission decreases uniformly in NIR and mid-infrared wavelengths(anemic disks) and throughout which most sources pass, and a radially differential one where the emission from the inner region of the disk decreases more rapidly than from the outer region (transition disks).Whether a disk evolves in a homologously or radially depleted fashion is still unknown and may depend on the nature of planet formation in the disk.
AB - Multi-wavelength surveys have vastly improved our understanding of many astrophysical objects, in particular, circumstellar disks. We present our results for the disk population of the young cluster NGC 2264. Our study was based on data obtained with the Infrared Array Camera (IRAC)and the Multiband Imaging Photometer on board the Spitzer Space Telescope combined with previously published optical data. We divide the disk population into 3 classes based on their spectral energy distribution shapes: optically thick disks, homologously depleted anemic disks, and radially depleted transition disks. We find that there are two distinct evolutionary paths for disks: a homologous one, where the disk emission decreases uniformly in NIR and mid-infrared wavelengths(anemic disks) and throughout which most sources pass, and a radially differential one where the emission from the inner region of the disk decreases more rapidly than from the outer region (transition disks).Whether a disk evolves in a homologously or radially depleted fashion is still unknown and may depend on the nature of planet formation in the disk.
KW - methods: observational
KW - infrared: stars
KW - stars: formation
KW - stars: circumstellar matter
KW - stars: planetary systems: protoplanetary discs
UR - https://research-portal.st-andrews.ac.uk/en/researchoutput/on-circumstellar-disks(982758fb-1484-43cb-aeb5-bc20738d3b62).html
M3 - Conference contribution
T3 - Astronomical Society of India (ASI) conference series
SP - 71
EP - 77
BT - Interstellar Matter and Star Formation
A2 - Ojha, D. K.
ER -