Accreting Double White Dwarf Binaries: Implications for LISA

Kyle Kremer, Katelyn Breivik, Shane L. Larson, Vassiliki Kalogera

Research output: Contribution to journalArticle

10 Scopus citations

Abstract

We explore the long-term evolution of mass-transferring white dwarf (WD) binaries undergoing both direct-impact and disk accretion and explore implications of such systems to gravitational-wave (GW) astronomy. We cover a broad range of initial component masses and show that these systems, the majority of which lie within the Laser Interferometer Space Antenna (LISA) sensitivity range, exhibit prominent negative orbital frequency evolution (chirp) for a significant fraction of their lifetimes. Using a galactic population synthesis, we predict ∼2700 of these systems will be observable with a negative chirp of 0.1 yr-2 by a space-based GW detector like LISA. We also show that detections of mass-transferring double WD systems by LISA may provide astronomers with unique ways of probing the physics governing close compact object binaries.

Original languageEnglish (US)
Article number95
JournalAstrophysical Journal
Volume846
Issue number2
DOIs
StatePublished - Sep 10 2017

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Keywords

  • accretion, accretion disks
  • binaries: general
  • celestial mechanics
  • gravitational waves
  • stars: mass-loss

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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