Sentences with phrase «age star clusters»

Not exact matches

This method stands in contrast to the conventional idea of the clusters» initial stars shedding gas as they age in order to spark future rounds of star birth.

Alternative explanations posit these anomalously massive black holes grew and merged in throngs of stars called globular clusters, but that process can easily require more time than the current age of the universe.

Astronomers had long thought globular clusters formed their millions of stars in bulk at around the same time, with each cluster's stars having very similar ages, much like twin brothers and sisters.

This image clearly shows stars nearly all the way into the core, and you can see that many of the stars are red, indicating their great age: The cluster is over 10 billion years old.

«Hubble shows link between stars» ages and their orbits in dense cluster.»

At that time, the sun likely resembled Iota Horologii, because the star is young: it's thought to have escaped from the Hyades star cluster, which is just 600 million years old, or about one - eighth our sun's present age.

«In the Messier 67 star cluster the stars are all about the same age and composition as the Sun.

And deep within the heart of just about all of these stellar clusters are strange populations of stars called blue stragglers, which appear much younger than their companions, even though they should all be the same age.

In this cluster the stars are all about the same age and composition as the Sun.

The age they have come up with differs from previous estimates, and this suggests that the established technique of determining the ages of star clusters is much less reliable than astronomers had thought.

A team led by Ted von Hippel of the National Optical Astronomy Observatories in Tucson, Arizona, and Gerry Gilmore of the University of Cambridge has used an accurate new technique to assess the age of a relatively young cluster of stars.

Although in the case of NGC 2477 astronomers seem to have underestimated the age of the cluster; they may have overestimated the age of other clusters, and this may explain the conflict between the ages of the oldest stars and the latest estimate of the Universe's age.

As a cluster ages, the colour and brightness of its stars varies in a way that astronomers thought they understood.

Using archival data from the Cluster Lensing And Supernova survey with Hubble (CLASH), Toft and his team were able to determine the stellar mass, star - formation rate, and the ages of the stars.

Her team studied infrared and radio wave emissions from disks in several star - forming clusters with well - known ages.

The clusters contain stars of the same age as the speeding star, around 30 million years.

For decades, astronomers thought that the stars that made up a given globular cluster all shared the same ages and chemical compositions — but we now know that they are stranger and more complicated creatures.»

Now, scientists have shown that there's some truth to the age - old advice: A dimming of the Pleiades star cluster may actually auger a weather change that affects local farmers, according to a report in today's Nature.

The astronomers discovered the four stars while searching the Galaxy for so - called blue horizontal - branch stars — ageing stars which are often found in globular clusters.

We know, that the same Salpeter power law exponent of -2.35 was measured in many star clusters of different ages, metallicities and total masses.

With an age that's only 2 % of the sun's, the Pleiades cluster is so young that its stars still drift through space together.

While it had been fully expected that the percentage of cluster galaxies which had stopped forming stars would increase as the Universe aged, this latest work quantifies the effect.»

STScI / NASA press releases: Hubble Makes the First Precise Distance Measurement to an Ancient Globular Star Cluster Hubble Unmasks Ghost Galaxies Deepest View of Space Yields Young Stars in Andromeda Halo Hubble Identifies Source of Ultraviolet Light in an Old Galaxy ESA press releases: Hubble Unmasks Ghost Galaxies Four Unusual Views of the Andromeda Galaxy Public speaking: On the Trail of the Missing Galaxies High - Level Science Products from Large and Treasury Programs: GO - 9453: The Age of the Andromeda Halo (126 orbits) GO - 10265: The Formation History of Andromeda (107 orbits) GO - 10816: The Formation History of Andromeda's Extended Metal - Poor Halo (128 orbits) GO - 11664 / 12666: The WFC3 Galactic Bulge Treasury Program: Populations, Formation History and Planets (56 orbits) GO - 12549: The Formation History of the Ultra-Faint Dwarf Galaxies (113 orbits)

The new estimates of the star cluster average ages were made possible using data obtained from the SAGES Legacy Unifying Globulars and GalaxieS (SLUGGS) survey, which was carried out on Keck Observatory's 10 - meter, Keck II telescope.

The authors continue to study this galaxy pair and currently are comparing the properties (e.g., locations, ages, and masses) of the star clusters previously observed with NASA's Hubble Space Telescope with the properties of the molecular clouds observed with ALMA.

This scenario is supported by the age estimations of the stars in the inner halo (10 — 12 billion years old) and globular clusters.

By knowing the main sequence lifespan of stars at this point, it becomes possible to estimate the age of the cluster.

This result extends to ~ 1 Gyr similar prior results in the ~ 600 Myr Hyades and Praesepe clusters, suggesting that rotation periods for cool dwarf stars delineate a well - defined surface in the 3 - dimensional space of color (mass), rotation, and age.

The stars in the cluster in the centre of the Omega nebula are very young with an average age of about 1 million years.

Because all the stars in a cluster have very nearly the same age and chemical composition, the differences between the member stars are entirely the result of their different masses.

Abstract: Asteroseismology of stars in clusters has been a long - sought goal because the assumption of a common age, distance and initial chemical composition allows strong tests of the theory of stellar evolution.

In addition to estimating the mass, radius and log g of stars on the red - giant branch of these clusters, we estimate the distance to the clusters and their ages.

The models include a new wind braking law based on recent numerical simulations of magnetized stellar winds and specific dynamo and mass - loss prescriptions a... ▽ More We present new models for the rotational evolution of solar - like stars between 1 Myr and 10 Gyr with the aim to reproduce the distributions of rotational periods observed for star forming regions and young open clusters within this age range.

Based on proximity and age, the Pistol Star appears to be a member of the four - million - year - old Quintuplet Cluster (AFGL 2004) located only about around 6.5 light - years (ly)-- two parsecs — away from it.

An average open cluster has spread most of its member stars along its path after several 100 million years; only few of them have an age counted by billions of years.

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