SIMBAD references

2012ApJ...760...26B - Astrophys. J., 760, 26 (2012/November-3)

The frequency of debris disks at white dwarfs.

BARBER S.D., PATTERSON A.J., KILIC M., LEGGETT S.K., DUFOUR P., BLOOM J.S. and STARR D.L.

Abstract (from CDS):

We present near- and mid-infrared photometry and spectroscopy from PAIRITEL, IRTF, and Spitzer of a metallicity-unbiased sample of 117 cool, hydrogen-atmosphere white dwarfs (WDs) from the Palomar-Green survey and find five with excess radiation in the infrared, translating to a 4.3+2.7_- 1.2_% frequency of debris disks. This is slightly higher than, but consistent with the results of previous surveys. Using an initial-final mass relation, we apply this result to the progenitor stars of our sample and conclude that 1-7 M stars have at least a 4.3% chance of hosting planets; an indirect probe of the intermediate-mass regime eluding conventional exoplanetary detection methods. Alternatively, we interpret this result as a limit on accretion timescales as a fraction of WD cooling ages; WDs accrete debris from several generations of disks for ∼10 Myr. The average total mass accreted by these stars ranges from that of 200 km asteroids to Ceres-sized objects, indicating that WDs accrete moons and dwarf planets as well as solar system asteroid analogs.

Abstract Copyright:

Journal keyword(s): infrared: planetary systems - infrared: stars - white dwarfs

VizieR on-line data: <Available at CDS (J/ApJ/760/26): table1.dat table2.dat>

Simbad objects: 122

goto Full paper

goto View the reference in ADS

To bookmark this query, right click on this link: simbad:2012ApJ...760...26B and select 'bookmark this link' or equivalent in the popup menu


2021.05.10-01:00:55

© Université de Strasbourg/CNRS

    • Contact