Results 1 to 10 of about 82,748 (221)

High Energy Emission of Symbiotic Recurrent Novae: RS Oph and V407 Cyg

open access: yesOpen Astronomy, 2012
Recurrent novae occurring in symbiotic binaries are candidate sources of high energy photons, reaching GeV energies. Such emission is a consequence of particle acceleration leading to pion production.
Hernanz M., Tatischeff V.
doaj   +1 more source

A Demarcation Criterion for Hydrogen Burning of Millinovae

open access: yesThe Astrophysical Journal
Millinovae are a new class of transient supersoft X-ray sources with no clear signature of mass ejection. They show similar triangle shapes of V / I band light curves with 1000 times fainter peaks than typical classical novae. Maccarone et al.
Izumi Hachisu, Mariko Kato
doaj   +1 more source

The Vertical Structure of Accretion Disks for Dwarf Novae [PDF]

open access: yesJournal of Astronomy and Space Sciences, 1985
We have constructed models of steady state accretion disk with accretion rate M=10^16 g/sec or 10^18 g/sec. The mass and the radius of white dwarf were taken as 1 Msolar and 10^9 cm, respectively. The possible application of the results to Z Cha and ZCam
Kyu Hong Choi, Kyung Mee Kim
doaj  

Series of Dwarf Nova Outbursts in the Post-novae AT Cancri and GK Persei

open access: yesThe Astronomical Journal
AT Cancri and GK Persei are post-novae (Nova Cnc in the seventeenth century and Nova Per 1901). Nowadays, they show episodic brightenings attributed to dwarf nova (DN) outbursts.
Vojtěch Šimon
doaj   +1 more source

A Phenomenon Resembling Early Superhumps in a New SU UMa-type Dwarf Nova with a 2 hr Orbital Period

open access: yesThe Astronomical Journal
We investigate K2BS5, an optical transient that we identified in Campaign 13 of the Kepler/K2 archives by the K2 Background Survey, and classify it as a new SU UMa-type dwarf nova.
Rebecca S. Boyle   +6 more
doaj   +1 more source

Fundamental Properties of Novae in M31

open access: yesThe Astrophysical Journal Supplement Series
The peak luminosities and rates of decline for a large sample of novae recently published by Clark et al. have been analyzed using the Yaron et al. nova models to estimate fundamental properties of the M31 nova population.
Allen W. Shafter, Kamil Hornoch
doaj   +1 more source

A Unified Model for Shock Interaction and γ-Ray Emission in Classical Novae

open access: yesThe Astrophysical Journal
We present a parameterized (“toy”) model for shock interaction and γ -ray emission in classical novae, in which a white dwarf envelope of mass M _env is removed over a timescale τ (proportional to the nova speed class, t _2 ) in an outflow that ...
Rebecca Diesing, Brian D. Metzger
doaj   +1 more source

Phosphorus-rich stars with unusual abundances are challenging theoretical predictions. [PDF]

open access: yesNat Commun, 2020
Masseron T   +6 more
europepmc   +1 more source

X-Ray Flashes on Helium Novae

open access: yesThe Astrophysical Journal
A helium nova occurs on a white dwarf (WD) accreting hydrogen-deficient matter from a helium star companion. When the mass of a helium envelope on the WD reaches a critical value, unstable helium burning ignites to trigger a nova outburst.
Mariko Kato, Izumi Hachisu
doaj   +1 more source

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