Nearby debris disk systems with high fractional luminosity reconsidered

Abstract

By searching the IRAS and ISO databases we compiled a list of 60 debris disks which exhibit the highest fractional luminosity values (fd>10^-4) in the vicinity of the Sun (d<120pc). Eleven out of these 60 systems are new discoveries. Special care was taken to exclude bogus disks from the sample. We computed the fractional luminosity values using available IRAS, ISO, and Spitzer data, and analysed the galactic space velocities of the objects. The results revealed that stars with disks of high fractional luminosity often belong to young stellar kinematic groups, providing an opportunity to obtain improved age estimates for these systems. We found that practically all disks with fd>5x10^-4 are younger than 100Myr. The distribution of the disks in the fractional luminosity versus age diagram indicates that (1) the number of old systems with high fd is lower than was claimed before; (2) there exist many relatively young disks of moderate fractional luminosity; and (3) comparing the observations with a current theoretical model of debris disk evolution a general good agreement could be found.

47 pages, 6 figures, AASTeX preprint (accepted for publication in the Astrophysical Journal); refined the text parts of table 6 and 7

Cited by in corpus (27)

• Direct Imaging of Multiple Planets Orbiting the Star HR 8799
• A Re-appraisal of the Habitability of Planets Around M Dwarf Stars
• Debris disks around Sun-like stars
• Variations on Debris Disks: Icy Planet Formation at 30-150 AU for 1-3 Solar Mass Main Sequence Stars
• The Complete Census of 70-um-Bright Debris Disks within the FEPS (Formation and Evolution of Planetary Systems) Spitzer Legacy Survey of Sun-like Stars
• Formation and Evolution of Planetary Systems (FEPS): Properties of Debris Dust around Solar-type Stars
• Long-Term Collisional Evolution of Debris Disks
• Formation and Evolution of Planetary Systems: Upper Limits to the Gas Mass in Disks Around Sun-like Stars
• Abundant Circumstellar Silica Dust and SiO Gas Created by a Giant Hypervelocity Collision in the ~12 Myr HD172555 System
• Extrasolar planets and brown dwarfs around A-F type stars VI. High precision RV survey of early type dwarfs with HARPS
• The History of the Solar System's Debris Disc: Observable Properties of the Kuiper Belt
• Discovery of extreme asymmetry in the debris disk surrounding HD 15115
• The Dust Properties of Eight Debris Disk Candidates as Determined by Submillimeter Photometry
• Collisional and Thermal Emission Models of Debris Disks: Towards Planetesimal Population Properties
• Long-wavelength observations of debris discs around sun-like stars
• Search for Cold Debris Disks around M-dwarfs
• The nature of mid-infrared excesses from hot dust around Sun-like stars
• An Unbiased Survey of 500 Nearby Stars for Debris Disks: A JCMT Legacy Program
• High-Resolution Imaging of the Dust Disk around 49 Ceti
• CARMA Millimeter-Wave Aperture Synthesis Imaging of the HD 32297 Debris Disk
• Color Gradients Detected in the HD 15115 Circumstellar Disk
• The discovery of new warm debris disks around F-type stars
• Discovery of an extended debris disk around the F2V star HD 15745
• A Ring of Warm Dust in the HD 32297 Debris Disk
• A formation scenario of young stellar groups in the region of the Scorpio Centaurus OB association
• The Frequency of Mid-Infrared Excess Sources in Galactic Surveys
• The Frequency of Warm Debris Disks and Transition Disks in a Complete Sample of Intermediate-Mass GLIMPSE Stars: Placing Constraints on Disk Lifetimes