Title

Connections Between Tilted Accretion Disks Around White Dwarfs And Substellar Companions

Keywords

debris disks; exo-zodiacal dust; infrared excess; planets; protoplanetary disks; Substellar companions

Abstract

Accretion disks in white dwarf systems are believed to be tilted. In a recent publication, the lift force has been suggested to be a source to disk tilt, a source that is likely relevant to all accretion disk systems. Lift is generated by slightly different supersonic gas stream speeds flowing over and under the disk at the bright spot. In this conference proceeding, we focus on whether a brown dwarf donor star accreting onto a white dwarf primary has enough mass to contribute to disk tilt. We also would like to obtain whether a white dwarf - brown dwarf close binary system has enough mass to induce and maintain a disk tilt of four degrees. We adopt SDSS 103533.03+055158.4 as our model system which has a mass transfer rate of (10±2) × 10-12M ⊙ yr-1. We find that the brown dwarf in SDSS 1035 does not have enough mass to contribute to disk tilt. We find a gross magnitude of the minimum mass transfer rate to be ∼10-10M ⊙yr-1. We conclude that SDSS 1035 does not seem to have a high enough mass transfer rate to induce and maintain an observable disk tilt. Hence one reason why brown dwarf donor systems may be so difficult to find could be due to their low mass transfer rates which do not induce observable dynamical effects that is typical in white dwarf-red dwarf CVs. © 2011 American Institute of Physics.

Publication Date

4-18-2011

Publication Title

AIP Conference Proceedings

Volume

1331

Number of Pages

324-328

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

DOI Link

https://doi.org/10.1063/1.3570995

Socpus ID

79953848746 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/79953848746

This document is currently not available here.

Share

COinS