Journal ArticleDOI
Double white dwarfs as progenitors of R Coronae Borealis stars and type I supernovae
Reads0
Chats0
TLDR
In this article, the authors explored the role of mass transfer in the evolution of double degenerate systems and found that low-mass helium/helium pairs are unstable to dynamical time-scale mass transfer and probably coalesce to form helium-burning sdO stars.Abstract:
Close double white dwarfs should arise from the second phase of mass exchagne in close binaries which first encountered mass exchange while the more massive star was crossing the Hertzprung gap. Tidal mass transfer in these double degenerate systems is explored. The sequence of double white dwarf divides naturally into three segments. (1) Low-mass helium/helium pairs are unstable to dynamical time-scale mass transfer and probably coalesce to form helium-burning sdO stars. (2) In helium/carbon-oxygen pairs, mass transfer occurs on the time scale for gravitational radiation losses (approx.10/sup -4/ M/sub sun/ yr/sup -1/); the accreted helium is quickly ignited, and the accretor expands to dimensions characteristic of R CrB stars, engulfing its companion star. (3) Carbon-oxygen/carbon-oxygen pairs are again unstable to dynamical time-scale mass transfer and, since their total masses exceed the Chandrasekhar limit, are destined to become supernovae. Inactive lifetimes in these latter systems between creation and interaction can exceed 10/sup 10/ years. Birthrates of R CrB stars and Type I supernovae by evolution of double white dwarfs are in reasonable agreement with observational estimates.read more
Citations
More filters
Journal ArticleDOI
Type Ia supernovae within dense carbon- and oxygen-rich envelopes: a model for ‘Super-Chandrasekhar’ explosions?
U. M. Noebauer,S. Taubenberger,Sergei Blinnikov,Sergei Blinnikov,E. I. Sorokina,E. I. Sorokina,E. I. Sorokina,Wolfgang Hillebrandt +7 more
TL;DR: In this article, the authors investigated the effects of the interaction between ejecta and circumstellar material on the ejecta evolution and the broad-band light curve and found that a strong reverse shock efficiently decelerates and compresses the ejected material, leading to a significant broadening of the optical light curve, a longer rise to maximum and a slower decline in the tail phase.
Journal ArticleDOI
X-RAY AND GAMMA-RAY FLASHES FROM TYPE Ia SUPERNOVAE?
TL;DR: In this paper, the authors investigate two potential mechanisms that will produce X-ray and gamma-ray flashes from Type Ia supernovae (SN-Ia), and they find that both mechanisms produce brief flashes of high-energy radiation with peak luminosities of 10{sup 48}-10{sup 50} erg s{sup -1}.
Journal ArticleDOI
The first pre-supersoft X-ray binary
Steven G. Parsons,Matthias R. Schreiber,Boris T. Gänsicke,Alberto Rebassa-Mansergas,Rafael Brahm,Rafael Brahm,Monica Zorotovic,Odette Toloza,Anna F. Pala,Claus Tappert,Amelia Bayo,Andrés Jordán,Andrés Jordán +12 more
TL;DR: In this article, the authors reported the discovery of an extremely close white dwarf plus F dwarf main-sequence star in a 12 h binary identified by combining data from the Radial Velocity Experiment survey and the Galaxy Evolution Explorer survey.
Journal ArticleDOI
The Spectacular Ultraviolet Flash From the Peculiar Type Ia Supernova 2019yvq
A. A. Miller,M. R. Magee,Abigail Polin,K. Maguire,E. Zimmerman,Yuhan Yao,Jesper Sollerman,Steve Schulze,Daniel A. Perley,M. Kromer,Mattia Bulla,Igor Andreoni,Eric C. Bellm,Kaushik De,Richard G. Dekany,Alexandre Delacroix,S. Dhawan,Christoffer Fremling,Avishay Gal-Yam,David Goldstein,V. Z. Golkhou,Ariel Goobar,Matthew J. Graham,I. Irani,M. M. Kasliwal,Stephen Kaye,Y.-L. Kim,R. R. Laher,A. A. Mahabal,Frank J. Masci,P. E. Nugent,Eran O. Ofek,E. S. Phinney,S. J. Prentice,Reed Riddle,M. Rigault,B. Rusholme,Tassilo Schweyer,David L. Shupe,Maayane T. Soumagnac,Giacomo Terreran,Robert J. Walters,Lin Yan,J. Zolkower,Shrinivas R. Kulkarni +44 more
TL;DR: In this paper, the second observed SN$\,$2019yvq, after iPTF$,$14atg, displays an early flash of emission in the ultraviolet (UV) and optical.
Journal ArticleDOI
Compact Object Mergers Driven by Gas Fallback
TL;DR: This Letter investigates the evolution of the binary system after a shock has propagated by performing smoothed particle hydrodynamics simulations and finds that significant binary hardening occurs when the gas mass bound to the binary exceeds that of the compact objects.
Related Papers (5)
Supernovae of type I as end products of the evolution of binaries with components of moderate initial mass (M< or approx. =9 M/sub sun/)
I. Iben,A.V. Tutukov +1 more
Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
Adam G. Riess,Alexei V. Filippenko,Peter Challis,Alejandro Clocchiatti,Alan H. Diercks,Peter M. Garnavich,R. L. Gilliland,Craig J. Hogan,Saurabh Jha,Robert P. Kirshner,Bruno Leibundgut,Mark M. Phillips,David J Reiss,Brian P. Schmidt,R. A. Schommer,R. Chris Smith,R. Chris Smith,Jason Spyromilio,Christopher W. Stubbs,Nicholas B. Suntzeff,John L. Tonry +20 more
Measurements of Omega and Lambda from 42 High-Redshift Supernovae
Saul Perlmutter,Saul Perlmutter,Greg Aldering,Gerson Goldhaber,Gerson Goldhaber,R. A. Knop,Peter Nugent,P. G. Castro,P. G. Castro,Susana E. Deustua,Sebastien Fabbro,Sebastien Fabbro,A. Goobar,A. Goobar,Donald E. Groom,I. M. Hook,I. M. Hook,A. G. Kim,A. G. Kim,A. G. Kim,M. Y. Kim,Julia C. Lee,Julia C. Lee,Nelson J. Nunes,Nelson J. Nunes,Reynald Pain,Reynald Pain,C. R. Pennypacker,C. R. Pennypacker,Robert Quimby,Christopher Lidman,Richard S. Ellis,Mike Irwin,Richard G. McMahon,Pilar Ruiz-Lapuente,Nicholas A. Walton,Bradley E. Schaefer,B. J. Boyle,Alexei V. Filippenko,Thomas Matheson,A. S. Fruchter,Nino Panagia,Nino Panagia,Heidi Jo Newberg,Warrick J. Couch +44 more