Sentences with phrase «around white dwarf stars»

Led by Christopher Manser of the University of Warwick's Astrophysics Group, the researchers investigated the remnants of planetary systems around white dwarf stars; in this instance, SDSS1228 +1040.

Not exact matches

The researchers found that relatively cool accretion discs around young stars, whose inner edges can be several times the size of the Sun, show the same behaviour as the hot, violent accretion discs around planet - sized white dwarfs, city - sized black holes and supermassive black holes as large as the entire Solar system, supporting the universality of accretion physics.

The small red circles denote other objects that emit X-rays, like neutron stars or white dwarfs, that are found scattered around more of the galaxy.

Named PH1, the planet goes around two of the four stars, shown close - up here: One is a yellow - white F - type star that is slightly warmer and more luminous than our sun; the other, at the 11 o'clock position, is a red dwarf, cooler and dimmer than the sun.

There are many white dwarfs that hold large amounts of hydrogen in their atmospheres, and this new study suggests that this is evidence that water - rich asteroids or comets are common around other stars than the Sun.»

That is because white dwarfs are 1000 times dimmer than stars like the Sun, which are so bright that they overwhelm any reflected light from planets around them.

As general relativity predicts, light from the background star bent around the white dwarf, distorted by its gravitational field.

Previous work had unified the variability in discs around black holes of different mass ranges, but by considering not just the mass of the object, but also its size, scientists can now add accreting white dwarfs and proto - stars to this unified picture.

The detected water most likely came from a minor planet, at least 90 km in diameter but probably much larger, that once orbited the GD 61 star before it became a white dwarf around 200 million years ago.

Those remnants went into orbit around the white dwarf — much like the rings around Saturn, Zuckerman said — before eventually spiraling onto the star itself, bringing with them the building blocks for life.

As Vega is so much bigger and hotter than Sol, however, the star will exhaust its core hydrogen after only another 650 million years or so (for a total life of around a billion years) and turn into a red giant or Cepheid variable before puffing away its outer layers to reveal a remnant core as a white dwarf.

HD 147513 A is a so - called young «Barium dwarf» (s - process element rich but comparatively carbon deficient) star that was probably enriched by an asymptotic branch giant (AGB) star (see Gacrux) but is now a very dim, white dwarf companion, which has an observed separation of around 4,400 AUs — 5.7» at a HIPPARCOS distance estimate of 42.0 ly (Porto de Mello and da Silva, 1997; and Poveda et al, 1993, pp. 74 - 75).

the first debris disk around a star with a companion white dwarf!

As US 708 traveled around the white dwarf, the dead star would have stolen its helium.