Results 1 to 10 of about 2,261,610 (72)

SRGeJ045359.9+622444: A 55 Minute Period Eclipsing AM Canum Venaticorum Star Discovered from a Joint SRG/eROSITA + ZTF Search [PDF]

The Astrophysical Journal, 2023
AM Canum Venaticorum (AM CVn) systems are ultracompact binaries where a white dwarf accretes from a helium-rich degenerate or semidegenerate donor.
Antonio C. Rodriguez, Ilkham Galiullin, Marat Gilfanov, Shrinivas R. Kulkarni, Irek Khamitov, Ilfan Bikmaev, Jan van Roestel, Lev Yungelson, Kareem El-Badry, Rashid Sunayev, Thomas A. Prince, Mikhail Buntov, Ilaria Caiazzo, Andrew Drake, Mark Gorbachev, Matthew J. Graham, Rustam Gumerov, Eldar Irtuganov, Russ R. Laher, Frank J. Masci, Pavel Medvedev, Josiah Purdum, Nail Sakhibullin, Alexander Sklyanov, Roger Smith, Paula Szkody, Zachary P. Vanderbosch   +26 more
doaj   +6 more sources

Probing the Efficiency of Tidal Synchronization in Outspiralling Double White Dwarf Binaries with LISA

The Astrophysical Journal, 2023
Compact-object binaries including a white dwarf component are unique among gravitational-wave sources because their evolution is governed not just by general relativity and tides, but also by mass transfer.
Sylvia Biscoveanu, Kyle Kremer, Eric Thrane   +2 more
doaj   +1 more source

Dynamical He Flashes in Double White Dwarf Binaries

The Astrophysical Journal, 2023
The detonation of an overlying helium layer on a 0.8–1.1 M _⊙ carbon–oxygen (CO) white dwarf (WD) can detonate the CO WD and create a thermonuclear supernova (SN).
Tin Long Sunny Wong, Lars Bildsten
doaj   +1 more source

A New WZ Sagittae-type Dwarf Nova KSP-OT-202104a Near the Period Minimum from the KMTNet Supernova Program

The Astronomical Journal
We present photometric and spectroscopic studies of a new WZ Sagittae (Sge)-type dwarf nova (DN) KSP-OT-202104a discovered by the Korea Microlensing Telescope Network Supernova Program. The source exhibits outburst amplitudes of ∼8 mag with a duration of
Sang Chul Kim, Youngdae Lee, Dae-Sik Moon, Hong Soo Park, Yuan Qi Ni, Nan Jiang, Hyobin Im   +6 more
doaj   +1 more source

Mass Loss and Subsequent Thermal Evolution of Surviving Helium White Dwarfs Shocked by Thermonuclear Supernovae

The Astrophysical Journal
Following a Type Ia supernova (SN Ia) in a double white dwarf (WD) binary, a surviving WD companion leaves at its orbital velocity ≈ 1000–3000 km s ^–1 . The Gaia mission has discovered seven such hypervelocity WDs with inflated radii indicative of shock
Tin Long Sunny Wong, Lars Bildsten
doaj   +1 more source

Multiphase State Transitions and Thermal−Tidal Decoupling in the AM CVn−Type Star V803 Cen

The Astrophysical Journal
AM CVn systems are ultracompact, short-period binaries emitting multimessenger signals and showing both normal outbursts and superoutbursts. They serve as ideal laboratories for studying accretion physics under extreme conditions and for testing the disk
Qi-Bin Sun, Sheng-Bang Qian, Li-Ying Zhu, Qin-Mei Li, Wen-Ping Liao, Fu-Xing Li, Wen-Xu Lin, Min-Yu Li, Ping Li, Zi-Mo Li, Tao Wang, Mao-Han Zhang   +11 more
doaj   +1 more source

The evolutionary history of ultra-compact accreting binaries

Astronomy & Astrophysics
Context. AM Canum Venaticorum (AM CVn) stars are ultra-compact binary systems composed of a white dwarf primary accreting from a hydrogen-deficient donor.
Yu W., Pala A. F., Kupfer T., Gänsicke B. T., Koester D., Belloni D., Wong T. L. S., Schreiber M. R., van Roestel J., Brown A. J., Waagen E. O., González-Carballo J.-L., Bednarz S., Bernacki K., De Martino D., Fernández Mañanes E., González Farfán R., Green M. J., Groot P. J., Hambsch F.-J, Knigge C., Martin-Velasco J.-L., Morales-Aimar M., Myers G., Naves Nogues R., Poggiani R., Popowicz A., Ramsay G., Reina-Lorenz E., Rodríguez-Gil P., Salto-González J.-L., Sion E. M., Steeghs D., Szkody P., Toloza O., Tovmassian G.   +35 more
doaj   +1 more source

The Diverse Outcomes of Binary White Dwarf Mergers and Connections to Galactic LISA Sources

The Astrophysical Journal
In the coming decade, the millihertz gravitational-wave observatory the Laser Interferometer Space Antenna (LISA) will provide the best constraints yet on the tens of thousands of close white dwarf binaries in the Milky Way, yielding unprecedented ...
Kyle Kremer, Katelyn Breivik, Claire S. Ye   +2 more
doaj   +1 more source

A helium-burning white dwarf binary as a supersoft X-ray source. [PDF]

Nature, 2023
Greiner J, Maitra C, Haberl F, Willer R, Burgess JM, Langer N, Bodensteiner J, Buckley DAH, Monageng IM, Udalski A, Ritter H, Werner K, Maggi P, Jayaraman R, Vanderspek R.   +14 more
europepmc   +1 more source

The seeds of disease: an explanation of contagion and infection from the Greeks to the Renaissance. [PDF]

Med Hist, 1983
Nutton V.
europepmc   +1 more source