Sentences with phrase «galactic halo»

It also suggests that dust in extended galactic haloes may be obscuring our view of the farthest objects in the Universe.

The «Local Bubble» of low - density, hot and ionized gas, is actually part of a tube - like chimney that extends through the local region of the spiral disk into the surrounding galactic halo, and so may can act as a vent for the energetic hot gas produced by supernovae (more).

The local void of gas extends out of the galactic disk and stretches into the overlying galactic halo region.

In the end, the team plucked out 38 new cool white dwarfs orbiting in the galactic halo.

By multiplying the density of the newfound cool dwarfs by the volume of the galactic halo, Oppenheimer's team estimates that white dwarfs make up, by the most conservative estimate, at least 3 % of the total galactic dark matter, they report online in Science on 23 March.

Despite their name, MACHOs need not occur only in the galactic halo, so astronomers can search for them by looking for microlensing effects anywhere where there are large numbers of stars.

While this is ruled out by experiments, some researchers have suggested that the neutrinos in a galactic halo have a distribution of velocities that differs from the standard Maxwell distribution characteristic of gas molecules.

Egged on by the suggestion that such new dark matter particles in our galactic halo might be directly detectable, a brave set of experimentalists began to devise techniques to observe them with detectors deep underground, far from the reach of most cosmic rays that would overwhelm such acute sensors.

This alignment increases Earth's net velocity through a galactic halo of dark matter particles, whose existence scientists have inferred from numerous astronomical observations.

Some are found in globular clusters, but most move in a huge cloud around the disk called the galactic halo, which has a luminous inner component defined by globular star clusters and other easily observable stars (with coronae of hot gas possibly expelled by supernovae and of high - velocity neutron stars) and an outer dark - matter component inferred from its gravitational impact on the Milky Way's spiral disk.

Just as our visible universe is governed by the Standard Model of physics — a well - tested family of particles (including the famous Higgs boson) and forcesmight a rich and varied model of dark matter particles and dark forces operate in this dark galactic halo?

Moreover, the star's discovery suggest that even relatively low - mass Population III stars could have formed and survived until today, still shining faintly below easy detectability as main sequence dwarf stars in distant reaches of the galactic halo.

Most of the stars in the central bulge and in the globular clusters of the galactic halo are old, low metals stars, and halo stars account for only 0.1 to 0.2 percent of the stars near Sol.

When SagDEG will be disrupted after the current encounter, M54 and the other at least three globulars of this dwarf (Arp 2, Terzan 7 and Terzan 8, which are all much fainter than M54) will be the «remnants», while the other stars will be spread over the galactic halo, or escape as intergalactic travelers.

Multiple supernovae can create superbubbles of hot gas in the ISM (Bruhweiler et al, 1980) and vent into the galactic halo (Norman and Ikeuchi, 1989).

On August 31, 2011, a team of astronomers using the European Southern Observatory's Very Large Telescope (VLT) announced their discovery of one of the most metal - poor stars known in the Milky Way's galactic halo.

Located around 4,140 light - years away in the galactic halo, SDSS J102915 +172927 is an ancient star that may be over 13 billion years old (more).

© ESO Like HE 1523 - 0901, which is also located thousands light - years away in the galactic halo, SDSS J102915 +172927 is probably more than 13 billion years old (more).

We propose that the cycle may be caused by modulation of cosmic ray (CR) flux by the Solar system vertical oscillation (64 My period) in the galaxy, the galactic north - south anisotropy of CR production in the galactic halo / wind / termination shock (due to the galactic motion toward the Virgo cluster), and the shielding by galactic magnetic fields.