Sentences with phrase «of dust grains»

The size of the dust grains also means much of it is likely to survive the radiation produced by VY Canis Majoris» inevitable dramatic demise as a supernova [3].

These saturated organic molecules are formed in interstellar space and are preserved on the surfaces of dust grains.

Even though she saw lots of dust in the icy patches of clouds, 60 percent of those dust grains also contained carbon, nitrogen, and phosphorus, suggesting that they are not just minerals.

One must consider the various effects that alter the measured polarized signal, such as the shape of dust grains, the efficiency of grain alignment, the magnetic field properties, and the projection of the signal along the line of sight.

We investigate detailed distributions of dust grains and polycyclic aromatic hydrocarbons (PAHs) around M82 to understand their interplay with the gaseous components.

The arcs seen in the B and V band images presented by Mauron & Huggins (1999) and Leão et al. (2006) are caused by dust scattering of the external illumination by the ambient Galactic light, but the PACS images show the direct emission of dust grains of which the main heating source is the thermal emission of nearby dust grains, with minor contributions from either the stellar UV flux (close to the star) or the diffuse Galactic light (in the outer envelope).

Looking at Comet ISON's chemical fingerprints — its ratio of carbon dioxide to water, its mix of different kinds of hydrogen atoms, the kind of dust grains it contains — will indicate where it formed 4.56 billion years ago, and thus put the wandering - Jupiter theory to the test.

In a paper published online today by Science, a group reports the growth of dust grains into significantly larger particles in the circumstellar dust and gas disks of the Orion Nebula.

«We're not sure whether these stars are holding onto reservoirs of gas much longer than expected, or whether there's a sort of «last gasp» of second - generation gas produced by collisions of comets or evaporation from the icy mantles of dust grains,» said Meredith Hughes, an astronomer at Wesleyan University and coauthor of the study.

De Leeuw's team created computer models of dust grains made of olivine, a common mineral both in our solar system and in the dusty nebulae around other stars, and calculated what happened when water molecules attached themselves to the irregular surfaces of these fluffy grains.

I develop numerical models to simulate the dynamical and collisional behavior of dust grains, and am particularly interested in connecting the dust evolution to the distribution of volatiles in the protoplanetary disk.

I will present new numerical models that treat dust coagulation / fragmentation, dust dynamics, simple gas - grain chemistry, and vapor diffusion simultaneously, and explore the connection between the water vapor in the disk atmosphere and the size - distribution and ice - to - rock ratios of the dust grains growing in the midplane.

After six months of work, the team formed by CSIC staff and the LuzLux production company, among others, has completed the documentary «Nanocosmos, a journey to the origins of dust grains, a road movie which talks about the technological and human challenge that lies behind the development of instruments in the area of Laboratory Astrophysics.

«Dust absorbs light and from our data we could calculate a curve that told us the about the amount of dust, the composition of the dust and the size of the dust grains.

It coats the surface of dust grains, turning them into cosmic snowflakes.

One must consider the various effects that alter the measured polarized signal, such as the shape of dust grains, the efficiency of grain alignment, the magnetic field properties, a... ▽ More (Sub --RRB- Millimeter observations of the polarized emission of aligned aspherical dust grains enable us to study the magnetic fields within protoplanetary disk.

We investigate detailed distributions of dust grains and polycyclic aromatic hydrocarbons (PAHs) a... ▽ More The edge - on starburst galaxy M82 exhibits complicated distributions of gaseous materials in its halo, which include ionized superwinds driven by nuclear starbursts, neutral materials entrained by the superwinds, and large - scale neutral streamers probably caused by a past tidal interaction with M81.

NASA's Spitzer Space Telescope has previously estimated the dust to be farther out, based on models of the size of the dust grains.

Recent theoretical studies have shown that the size of dust grains can be estimated more precisely with polarization observations.

Since the ratio of the radio intensities in different frequencies depends on the size of the dust grains, researchers can estimate the size of dust grains.