Debris Disks

Review written by Attila Moór
Team: P. Ábrahám, Sz. Csizmadia, Cs. Kiss, A. Moór


Circumstellar disks are believed to be ubiquitous around young stars. These disks are eroded in time due to stellar wind, Poynting-Robertson drag, radiation pressure, sublimation and coagulation into planets. Although the timescale of this erosion is less than 10 million years many older main-sequence stars have thermal emission from cold dust. These disks usually have a disklike or ring morphology at optical, infrared and submillimeter wavelengths with typical radii of 50 AU. Thus the sizes of these disks resemble the size of the Kuiper belt in our solar system. In our current knowledge, collisions between comets and asteroids in an extra-solar Kuiper belt can replenish the dust in "debris disks" around main-sequence stars. (more)

The ESA Infrared Space Observatory (ISO) was launched in November 1995 and the routine scientific operations continued until April 1998. Several ISO key programmes were devoted to study debris disks around main-sequence stars. One important aspects of this research was the study of temporal evolution of these disks. These studies - supporting the models - demonstrate that debris disks are more common around young stars than around old ones and there is a trend for older debris disks to be less massive than younger disks. The results of these programmes, however were published in separate papers and no attempt has been made up to now combine all available data sets using a homogeneous data reduction method. In the framework of our ISO Data Archive project we collected all normal star observations measured in mini-map observing mode and we compiled a catalogue including recalibrated fluxes of these objects.
(For details see\_reports/technote5.pdf)

Title Participants Project Page
Cold debris disks around F stars Moór, A., Ábrahám, P., Kiss, Cs., Csengeri, T., Kóspál, Á., Juhász, A., Pascucci, I., Apai, D., Grady, C., Henning, T.
Debris disks studies on the basis of Spitzer Observations (M.S. Thesis of Bettina Gergely) Gergely, B., Moór, A.

Previous projects

Title Participants ADS link Project Page
The Discovery of New Warm Debris Disks Around F-type Stars (2009) Moór, A.; Apai, D.; Pascucci, I.; Ábrahám, P.; Grady, C.; Henning, Th.; Juhász, A.; Kiss, Cs.; Kóspál, Á.
On the Relationship Between Debris Disks and Planets (2009) Kóspál, Ágnes; Ardila, David R.; Moór, Attila; Ábrahám, Péter
ISOPHOT's view on the Vega-phenomenon (2007) P. Ábrahám, A. Moór, Cs. Kiss
Nearby Debris Disk Systems with High Fractional Luminosity Reconsidered (2006) Moór, A.; Ábrahám, P.; Derekas, A.; Kiss, Cs.; Kiss, L. L.; Apai, D.; Grady, C.; Henning, Th.
Circumstellar dust around main-sequence stars: what can we learn from the ISOPHOT archive? (2003) Ábrahám, Péter; Moór, Attila; Kiss, Csaba; Héraudeau, Philippe; del Burgo, Carlos
Search for cool circumstellar matter in the Ursae Majoris group with ISO (1998) Abraham, Peter; Leinert, Christoph; Burkert, Alfons; Lemke, Dietrich; Henning, Thomas