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Your search keyword '"White dwarfs -- Natural history"' showing total 15 results
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15 results on '"White dwarfs -- Natural history"'

1. Inside the universe's BIGEST BLASTS

Author

Cendes, Yvette

Subjects
Supernovae -- Identification and classification -- Observations, White dwarfs -- Natural history, Astronomy
Abstract

SUPERNOVAE ARE THE most spectacular fireworks in the universe. Just one such explosion can briefly outshine the rest of the stars in a galaxy combined. Astronomers have become adept at [...]

Published
2022

2. Some white dwarfs can look young again

Subjects
White dwarfs -- Natural history, Astronomy
Abstract

AS A SUN-LIKE STAR AGES, it puffs up and blows away its outer atmosphere, even as nuclear fusion in the core putters out as its hydrogen fuel disappears. Eventually, a [...]

Published
2022

3. Three stars become two

Author

Wenz, John

Subjects
White dwarfs -- Natural history, Astronomy
Abstract

White dwarfs are the dense cores of stars like our Sun that have exhausted their hydrogen fuel and now exist as a sort of lightweight neutron star. But the HS [...]

Published
2017

4. Investigators at European Southern Observatory Report Findings in Astronomy Research (White Dwarfs With Planetary Remnants In the Era of Gaia - I. Six Emission Line Systems)

Subjects
White dwarfs -- Natural history, Extrasolar planets -- Natural history, Health, Science and technology
Abstract

2021 AUG 13 (NewsRx) -- By a News Reporter-Staff News Editor at Science Letter -- Investigators discuss new findings in Science - Astronomy Research. According to news originating from Garching, [...]

Published
2021

5. In Andromeda, a star explodes like clockwork: This nova has erupted once a year for millions of years, leaving behind the largest known cloud of stellar debris around a white dwarf

Author

Parks, Jake

Subjects
Andromeda Galaxy -- Natural history, White dwarfs -- Natural history, Astronomy, Astronomy
Abstract

Astronomers have discovered that a star in the Andromeda Galaxy (M31) has been regularly erupting for the past million years, leaving behind one of the biggest shells of ejected material [...]

Published
2019

6. Explosive origins for antimatter

Subjects
White dwarfs -- Natural history, Antimatter -- Natural history, Outer space -- Natural history, Environmental issues, Science and technology, Zoology and wildlife conservation
Abstract

White dwarf supernovae might be generating positrons. White dwarf supernovae might be generating positrons., Author Affiliations: Explosive origins for antimatter Most of the antimatter in interstellar space could be created in the merger and resulting explosions of white dwarfs -- the inert remnants of [...]

Published
2017
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7. QUICK TAKES

Subjects
Protons -- Atomic properties, White dwarfs -- Natural history, Oort cloud -- Natural history, Astronomy
Abstract

SMALL BANG White dwarf LP 40-365 may be the remnant of a type lax supernova, which doesn't destroy its progenitor but instead gives it a kick, sending it flying through [...]

Published
2017

8. White dwarf mergers seen as antimatter source

Subjects
White dwarfs -- Natural history, Antimatter -- Natural history, Astronomy
Abstract

Antimatter is matter's opposite. For each particle of 'normal' matter, there is an antimatter particle with an opposite charge; for example, positrons are the antimatter equivalent of electrons. When matter [...]

Published
2017

9. An ultramassive, fast-spinning white dwarf in a peculiar binary system

Author

Mereghetti, S., Tiengo, A., Esposito, P., La Palombara, N., Israel, G.L., and Stella, L.

Subjects
White dwarfs -- Natural history, White dwarfs -- Chemical properties, Stars, Double -- Research, Astrophysics -- Research, Science and technology
Abstract

White dwarfs typically have masses in a narrow range centered at about 0.6 solar mass ([M.sub.[dot encircle]). Only a few ultramassive white dwarfs (mass > 1.2 [M.sub.[dot encircle]) are known. Those in binary systems are of particular interest, because a small amount of accreted mass could drive them above the Chandrasekhar limit, beyond which they become gravitationally unstable. Using data from the x-ray multimirror mission (XMM)--Newton satellite, we show that the x-ray pulsator RX J0648.0-4418 is a white dwarf with mass > 1.2 [M.sub.[dot encircle]), based on dynamical measurements only. This ultramassive white dwarf in a post--common envelope binary with a hot subdwarf can reach the Chandrasekhar limit, and possibly explode as a type la supernova, when its helium-rich companion will transfer mass at an increased rate through Roche lobe overflow.

Published
2009

10. Creating a stellar explosion

Author

Pagnotta, Ashley

Subjects
Supernovae -- Natural history, Stellar evolution -- Natural history, White dwarfs -- Natural history, Astronomy
Abstract

Q: I read recently about the possibility of two white dwarfs colliding to create a type Ia supernova. Why do astronomers think it has to be two white dwarfs instead [...]

Published
2012

11. Curiouser and curiouser: happy anniversary, white dwarf star!

Author

Bartusiak, Marcia

Subjects
Sirius -- Natural history, White dwarfs -- Natural history, Stars, Double -- Natural history, Anthropology/archeology/folklore, Biological sciences, Earth sciences, Science and technology, Zoology and wildlife conservation
Abstract

One hundred fifty years ago, in 1862, the first hint arrived that the stellar universe was far stranger than anyone imagined--or could imagine. It came with the knowledge that a [...]

Published
2012

12. Supernovae: Type Ia, two ways

Author

Carlisle, Camille M.

Subjects
Stellar evolution, Supernovas -- Natural history, White dwarfs -- Natural history, Astronomy
Abstract

Two new studies confirm that the white dwarfs that explode as Type la supernovae can approach death on two different paths. When white dwarfs accrete too much material, they burst [...]

Published
2015

14. 3000 kelvin

Subjects
White dwarfs -- Natural history, Stars -- Temperature, Astronomy
Abstract

The maximum temperature of the coldest known candidate white dwarf the crystallized core of a once-Sun-like star--according to a paper in the July 10 issue of The Astrophysical [...]

Published
2014

15. White dwarf boosts light of companion

Author

Crockett, Christopher

Subjects
White dwarfs -- Natural history, Astronomical research, Stars, Double -- Natural history, Science and technology
Abstract

Astronomers have discovered a unique pair of stars consisting of a white dwarf, the compact core of a dead star, and the sunlike star it orbits. When it passes between [...]

Published
2014

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