Sentences with phrase «dwarf star systems»

Not exact matches

This is the first time planets have been observed orbiting ultra-cool dwarves — though scientists had suspected that such stars could host small solar systems.

If there were a larger star roaming around close to our solar system, the Sun and inevitably every planet, moon, dwarf planet and space rock would be pulled towards that instead... Simply, really... «LOL!!»

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.

Close encounter Tracing the trajectory of the star and its brown dwarf companion back in time, Mamajek's team found with 98 % confidence that Scholz's star passed within the Solar System's Oort cloud, a reservoir of comets, about 70,000 years ago.

The system's two sunlike stars, Alpha Centauri A and B, orbit each other closely while Proxima Centauri, a tempestuous red dwarf, hangs onto the system tenuously in a much more distant orbit.

With planets orbiting M dwarfs quickly becoming the darlings in the search for life beyond our solar system, a new generation of observatories are poised to discover hundreds of worlds around these stars.

The two sunlike stars, Alpha Centauri A and B, orbit each other closely while Proxima Centauri, a tempestuous red dwarf, hangs onto the system tenuously in a much more distant orbit.

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.

This was the first planetary system around a small red dwarf star.

In my 2013 science - fiction novel Proxima I imagined a habitable planet orbiting the red dwarf Proxima Centauri, the nearest star to our solar system.

Project Blue's proposed telescope would have a light - gathering mirror just half a meter wide — so small that it could only look for Earth - like planets around two stars: the Sun - like Alpha Centauri A and Alpha Centauri B, which along with the red dwarf Proxima Centauri form the nearest star system to our own at just over four light - years away.

«Asteroid ripped apart to form star's glowing ring system: Research includes first image of ring system orbiting a white dwarf.»

The measurement is the distance to SS Cygni, a star system consisting of a white dwarf plus a companion.

About 561 light - years away, the fifth planet discovered in this dwarf - star system circles its star's habitable zone.

«Surprisingly, the host galaxy [of FRB 121102] is a puny, star - forming dwarf system,» says ASTRON's Cees Bassa, who led the optical observations together with Shriharsh Tendulkar of McGill University in Montreal, Canada.

Outside of our solar system, auroras, which indicate the presence of a magnetosphere, have been spotted on brown dwarfs — objects that are bigger than planets but smaller than stars.

Known as an ultra-compact dwarf, this type of system has up to a billion stars and can be similar in mass to a galaxy, but it is compact and looks more like a star cluster.

Ultra-compact dwarfs, highlighted here within the so - called Fornax galaxy cluster, are a type of small star system.

At the same meeting, astronomer Thomas Beatty of Ohio State University, Columbus, announced the discovery of just such a system with the small KELT telescope in Arizona: a brown dwarf 27 times as massive as Jupiter, orbiting its hot parent star every 30 hours.

[3] Type Ia Supernovae occur when an accreting white dwarf in a binary star system slowly gains mass from its companion until it reaches a limit that triggers the nuclear fusion of carbon.

The discovery came as a complete surprise, as the team assumed the dusty white dwarf was a single star but co-author Dr Steven Parsons (University of Valparaíso and University of Sheffield), an expert in double star (or binary) systems noticed the tell - tale signs.

Of the 10 closest star systems to Earth, only one does not contain a low - mass star (the Sirius system consists of a blue giant and an ultra-compact white dwarf, the remnant of a Sun - like star).

«Our knowledge of binary evolution suggests that, if the companion star can survive the transition, brown dwarfs should be common in this type of system.

In the background is the star's binary companion, Kepler - 13B, and the third member of the multiple - star system is the orange dwarf star Kepler - 13C.

Alpha Centauri (shown with the arrow) is a system of three stars, one of which is the red dwarf Proxima Centauri.

The fastest pulsars are in binary systems with another object, like a star or a white dwarf.

Observations of the explosions of white dwarf stars in binary systems, so - called Type Ia supernovae, in the 1990s then led scientists to the conclusion that a third component, dark energy, made up 68 % of the cosmos, and is responsible for driving an acceleration in the expansion of the universe.

This can occur if the white dwarf is part of a binary star system.

Scholz's star is actually a binary system formed by a small red dwarf, with about 9 % of the mass of the Sun, around which a much less bright and smaller brown dwarf orbits.

The host star, Kepler - 186, is an M1 - type dwarf star relatively close to our solar system, at about 500 light years and is in the constellation of Cygnus.

It's not yet clear how this binary system formed, but the discovery may help redefine the line between planets and brown dwarfs — failed stars tens of times the mass of Jupiter.

Both occur in systems where two stars orbit each other: a white dwarf sucks away the outer layers of a larger companion star until the smaller star reaches a critical mass, causing an explosion.

The second theory proposes that only one star in the system is a white dwarf, while its companion is a normal star.

This red dwarf pulls on the 55 Cancri system, and because all five planets in the system — and their host star — are such a tight - knit family, they behave like ice skaters holding hands, so that the companion star's tugs cause them all to do somersaults in space.

Other astronomers find the detections convincing, although most reserve the name «planet» for bodies that form within a planetary system and orbit stars, says theorist Alan Boss of the Carnegie Institution of Washington in Washington, D.C. «They should call them «planetary - mass brown dwarfs,»» Boss says.

In Type 1 supernovas, one star in the binary system is a white dwarf, a dying star that has consumed almost all of its hydrogen.

And from what we've learned about the rich diversity of the planets, dwarf planets and moons in our solar system, we shouldn't underestimate what we might discover in other star systems, says Soderblom.

The superior sensitivity of the latest generation of ground - based instruments has allowed astronomers to discover a wealth of exoplanets (most of them in multi-planetary systems) around red dwarfs, while overturning our conventional notions and expectations regarding planetary formation and evolution processes around metal - poor stars.

A Type Ia supernova results from a white dwarf that's part of a binary system (that is, one that shares an orbit with another star) and was about twice the size of our sun during its life.

From the moment that seven Earth - sized planets were discovered in orbit around TRAPPIST - 1 — an ultracool dwarf star located 39 light years away — astronomers have been busy trying to learn everything they can about this intriguing star system, particularly its potential to foster life.

Red dwarfs are the most common type of star in our galaxy, and many are known to possess planetary systems.

The sun will eventually lose most of its mass as it becomes a white dwarf, and could come to resemble other burnt - out star systems spotted by NASA's Spitzer Space Telescope in a 2009 study.

The brightest star in the sky is the red dwarf Gliese 667 C, which is part of a triple star system.

The vortex coronagraph has the potential to image planetary systems and brown dwarfs closer to their host stars than was possible previously.

We suggest that the habitability of red dwarf systems may peak in the far future, while the present time is optimal for habitability around yellow and orange dwarf stars.

Recent statistics indicate that over a fourth of Sun - like stars and roughly a half of red dwarfs in our Milky Way Galaxy have been found in multi-star systems — around 44 percent of of spectral types F6 to K3 and possibly declining to one third to one fourth of very dim type M stars that are difficult to observe (Raghavan et al, 2010; Charles J. Lada, 2006; and Duquennoy and Mayor, 1991).

A binary star system (consisting of a white dwarf and a companion star) that rapidly brightens, then slowly fades back to normal.

In our new study Kevin has used old and new observations of the system to constrain the orbit of the companion (a red dwarf star labeled B) over the past fourteen years.

The result is an object having two distinct parts: a well - defined core of mostly carbon ash (a white dwarf star; see below End states of stars) and a swollen spherical shell of cooler and thinner matter spread over a volume roughly the size of the solar system.

My research concentrates on the study of exploding stars — mainly nova outbursts caused by thermonuclear explosions on the surface of white dwarfs in binary star systems.