Found: the progenitors of AM CVn and supernovae .Ia

@article{Kilic2014FoundTP,
  title={Found: the progenitors of AM CVn and supernovae .Ia},
  author={Mukremin Kilic and J. J. Hermes and Alexandros Gianninas and Warren R. Brown and Craig O. Heinke and Marcel A. Agueros and Paul Robin Brian Chote and Denis J. Sullivan and Keaton J. Bell and Samuel Thomas Harrold},
  journal={Monthly Notices of the Royal Astronomical Society},
  year={2014},
  volume={438},
  pages={26}
}
We present optical and X-ray observations of two tidally distorted, extremely low-mass white dwarfs (WDs) with massive companions. There is no evidence of neutron stars in our Chandra and XMM observations of these objects. SDSS J075141.18−014120.9 (J0751) is an eclipsing double WD binary containing a 0.19 M⊙ WD with a 0.97 M⊙ companion in a 1.9 h orbit. J0751 becomes the fifth eclipsing double WD system currently known. SDSS J174140.49+652638.7 (J1741) is another binary containing a 0.17 M⊙ WD… Expand

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References

SHOWING 1-10 OF 51 REFERENCES
The merger rate of extremely low mass white dwarf binaries: links to the formation of AM CVn stars and underluminous supernovae★
We study a complete, colour-selected sample of double-degenerate binary systems containing extremely low mass (ELM) ≤0.25 M⊙ white dwarfs (WDs). We show, for the first time, that Milky Way disc ELMExpand
The Elm Survey. II. Twelve Binary White Dwarf Merger Systems
We describe new radial velocity and X-ray observations of extremely low-mass white dwarfs (ELM WDs, {approx}0.2 M{sub sun}) in the Sloan Digital Sky Survey Data Release 4 and the MMT HypervelocityExpand
Two new tidally distorted white dwarfs
We identify two new tidally distorted white dwarfs (WDs), SDSS J174140.49+652638.7 and J211921.96–001825.8 (hereafter J1741 and J2119). Both stars are extremely low mass (ELM, ≤ 0.2 M ☉) WDs inExpand
The ELM Survey. V. Merging Massive White Dwarf Binaries
We present the discovery of 17 low mass white dwarfs (WDs) in short-period P ≤ 1 day binaries. Our sample includes four objects with remarkable logg ≃ 5 surface gravities and orbital solutions thatExpand
THE ELM SURVEY. IV. 24 WHITE DWARF MERGER SYSTEMS
We present new radial velocity and X-ray observations of extremely low mass (ELM, {approx}0.2 M{sub Sun }) white dwarf (WD) candidates in the Sloan Digital Sky Survey Data Release 7 area. We identifyExpand
THE ELM SURVEY. III. A SUCCESSFUL TARGETED SURVEY FOR EXTREMELY LOW MASS WHITE DWARFS
Extremely low mass (ELM) white dwarfs (WDs) with masses < 0.25 M{sub Sun} are rare objects that result from compact binary evolution. Here, we present a targeted spectroscopic survey of ELM WDExpand
The (Double) White Dwarf Binary SDSS 1257+5428
SDSS 1257+5428 is a white dwarf in a close orbit with a companion that has been suggested to be a neutron star. If so, it hosts the closest known neutron star, and its existence implies a greatExpand
DISCOVERY OF THE ECLIPSING DETACHED DOUBLE WHITE DWARF BINARY NLTT 11748
We report the discovery of the first eclipsing detached double white dwarf (WD) binary. In a pulsation search, the low-mass helium core WD NLTT 11748 was targeted for fast (1 minute) differentialExpand
RAPIDLY DECAYING SUPERNOVA 2010X: A CANDIDATE '.Ia' EXPLOSION
We present the discovery, photometric, and spectroscopic follow-up observations of SN 2010X (PTF 10bhp). This supernova decays exponentially with τ_d = 5 days and rivals the current recordholder inExpand
Absolute dimensions of detached eclipsing binaries – I. The metallic‐lined system WW Aurigae
WWAurigae is a detached eclipsing binary composed of two metallic-lined A-type stars orbiting each other every 2.5 days. We have determined the masses and radii of both components to accuracies ofExpand
...
1
2
3
4
5
...