A helium flash is a very brief thermal runaway nuclear fusion of large quantities of helium into carbon through the triple-alpha process in the core of...

pressure, helium fusion will ignite on a timescale of days in a helium flash. In the nondegenerate cores of more massive stars, the ignition of helium fusion...

process, known as the helium flash, lasts a matter of seconds but burns 60–80% of the helium in the core. During the core flash, the star's energy production...

called the first giant branch, is the portion of the giant branch before helium ignition occurs in the course of stellar evolution. It is a stage that follows...

helium core during a red giant phase, undergo a helium flash before fusing helium on the horizontal branch, evolve along the AGB while burning helium...

less dramatic event in the normal evolution of solar-mass stars, the "helium flash". Chemical reactions involving thermal runaway are also called thermal...

An extreme helium star (abbreviated EHe) is a low-mass supergiant that is almost devoid of hydrogen, the most common chemical element of the Universe....

stars originally similar to the Sun which have undergone a helium flash and are now fusing helium in their cores. Red clump stellar properties vary depending...

up and eventually the helium shell ignites explosively, a process known as a helium shell flash. The power of the shell flash peaks at thousands of times...

expands, producing an event called helium flash. Non-degenerate cores initiate fusion more smoothly, without a flash. The output of this event is absorbed...

A helium star is a class O or B star (blue), which has extraordinarily strong helium lines and weaker than normal hydrogen lines, indicating strong stellar...

rocks Helium fusion, a type of nuclear fusion in stars Helium flash, the sudden beginning of helium fusion in certain kinds of stars Isotopes of helium Helium-3...

so-called helium flash. In more-massive stars, the collapsing core will reach these temperatures before it is dense enough to be degenerate, so helium fusion...

as their core hydrogen is depleted and they begin to burn helium in core in a helium flash; they develop a degenerate carbon-oxygen core later on the...

lobe overflow of the primary occurs prior to helium flash, the shedding of mass can leave behind a helium white dwarf with a mass as low as 0.1 M☉. The...

sufficient helium in its core to ignite it. In stars around the mass of the Sun, this begins at the tip of the red giant branch with a helium flash from a...

the star expands so that the helium fusion ceases, and the hydrogen shell burning restarts. During these shell helium flashes, the mass loss from the star...

found in a less dramatic form in a helium flash in the core of a sufficiently massive red giant star. Helium flash – Brief thermal runaway nuclear fusion...

1078 years, much lower than previous estimations. Once the Sun stops fusing helium in its core and ejects its layers in a planetary nebula in about 8 billion...

stars on the red-giant branch (RGB) have an inert helium core and remain on the RGB until a helium flash moves them to the horizontal branch. However, stars...

carbon–oxygen cores that are large enough to ignite carbon in a flash analogous to the earlier helium flash. The second dredge-up is very strong in this mass range...

brightest nova of this millennium, reaching magnitude 3.3. A helium nova (undergoing a helium flash) is a proposed category of nova event that lacks hydrogen...

sequence. After this, the star's degenerate helium core abruptly ignites in a helium flash fusing helium, and the star passes on to the horizontal branch...

-22. Deupree, Robert G.; Wallace, Richard K. (June 1, 1987). "The Core Helium Flash and Surface Abundance Anomalies". The Astrophysical Journal. 317: 724...

Intermediate polar X-ray binary Supersoft X-ray source Binary pulsar Helium flash Carbon detonation Properties Pulsating Urca process Electron-degenerate...

(Am, CP1) magnetic (Ap, CP2) non-magnetic mercury-manganese (HgMn, CP3) helium-weak (He-weak, CP4). The class names provide a good idea of the peculiarities...

but much happens. First, the core (full of degenerate helium) ignites violently in the helium flash; it is estimated that 6% of the core—itself 40% of the...

to do so until it accumulates a large enough degenerate helium core to ignite the helium flash. It has likely exhausted the hydrogen from its core and...

8 times the mass of the Sun, this will occur in a process called the helium flash. The evolutionary track of the star will then carry it toward the left...

believed to currently be in thermal instability and within its final shell helium flash phase. At the time of its discovery, astronomers believed Sakurai's Object...