Two new AM Canum Venaticorum binaries from the Sloan Digital Sky Survey III

P. J. Carter*, B. T. Gaensicke, D. Steeghs, T. R. Marsh, E. Breedt, T. Kupfer, N. P. Gentile Fusillo, P. J. Groot, G. Nelemans

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

11 Citations (Scopus)

Abstract

The AM Canum Venaticorum (AM CVn) binaries are a rare group of ultrashort period, mass-transferring white dwarf binaries, some of which may be Type Ia supernova progenitors. More than a third of the total known population of AM CVn binaries have been discovered via the Sloan Digital Sky Survey (SDSS). Here, we discuss our search for new AM CVns in the SDSS spectroscopic data base, and present two new AM CVns discovered in SDSS-III spectroscopy, SDSS J113732.32+405458.3 and SDSS J150551.58+065948.7. The AM CVn binaries exhibit a connection between their spectral appearance and their orbital period, the spectra of these two new AM CVns suggest that they may be long-period systems. Using the radial velocity variations of the emission lines, we measure a possible orbital period of 59.6 +/- 2.7 min for SDSS J113732.32+405458.3. Since our search of SDSS spectroscopy has revealed only these two new systems, it is unlikely that a large population of AM CVn binaries have been missed, and their discovery should have little effect on previous calculations of the AM CVn space density.

Original languageEnglish
Pages (from-to)2848-2853
Number of pages6
JournalMonthly Notices of the Royal Astronomical Society
Volume439
Issue number3
DOIs
Publication statusPublished - Apr 2014

Keywords

  • accretion, accretion discs
  • binaries: close
  • stars: individual: SDSS J113732.32+405458.3
  • stars: individual: SDSS J150551.58+065948.7
  • novae, cataclysmic variables
  • white dwarfs
  • DA WHITE-DWARFS
  • CVN STARS
  • ORBITAL PERIOD
  • SPECTROSCOPIC ANALYSIS
  • SPACED DATA
  • GP COM
  • X-RAY
  • SYSTEMS
  • POPULATION
  • EMISSION

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