Age of NGC 6652 globular cluster specified

May 05, 2020

Senior Research Associate Margarita Sharina (Special Astrophysical Observatory) and Associate Professor Vladislav Shimansky (Kazan Federal University) studied the globular cluster NGC 6652.4.05957 and found out that its age is close to 13.6 billion years, which makes it one of the oldest objects in the Milky Way.

Globular clusters are mostly situated tens and hundreds of thousands of light years from Earth, and only the brightest stars in them can actually be studied. Margarita Sharina, a Kazan Federal University alumna, came up with the idea of researching the spectra of full star clusters several years ago. Together with Vladislav Shimansky, she developed Cluster, a special software package to model such spectra. During their joint work, the two scientists have determined fundamental characteristics of almost 40 globular clusters.

In this paper, they analyzed the spectra of NGC 6652 obtained by the Cerro Tololo Observatory. The overall ratio of heavy elements in the cluster turned out to be unusually high. Furthermore, some anomalies in the ratio of several elements (carbon, nitrogen, sodium, magnesium, calcium, and titanium).

"For a long time, the consensus was that the younger the galactic object is, the higher its metallicity. Closer to the late 20th century, astronomers started to move away from this viewpoint," explains Shimansky. "NGC 6652 is a rather old globular cluster, its age is about 13.6 billion years, according to various estimates. At the same time, its metallicity is rather high. The reason, hypothetically, is its unusual dynamics - the matter which formed the cluster has passed through the galactic disk multiple times and amassed the heavy elements synthesized there."

Studying globular clusters with up to a million stars can help research the early stages of the Universe.

During this past decade, many large telescopes have been observing galactic and extragalactic globular clusters - natural laboratories which facilitate the studies of stars and galaxies. Many more interesting discoveries are to be made after more data is deciphered, concludes Shimansky.
-end-


Kazan Federal University

Related Globular Clusters Articles from Brightsurf:

Most isolated massive stars are kicked out of their clusters
A pair of University of Michigan studies reveals how some massive stars -- stars eight or more times the mass of our sun--become isolated in the universe: most often, their star clusters kick them out.

Low-metallicity globular star cluster challenges formation models
On the outskirts of the nearby Andromeda Galaxy, researchers have unexpectedly discovered a globular cluster (GC) - a massive congregation of relic stars - with a very low abundance of chemical elements heavier than hydrogen and helium (known as its metallicity), according to a new study.

Star clusters are only the tip of the iceberg
Star clusters have been part of the Imaginarium of human civilization for millennia.

Small quake clusters can't hide from AI
A deep learning algorithm developed at Rice University analyzes data from a deadly landslide in Greenland to show how it may someday predict seismic events like earthquakes and volcanic eruptions.

Discovered: Remnant of ancient globular cluster that's "the last of its kind"
A team of astronomers discovered a stellar stream composed of the remnants of an ancient globular cluster that was torn apart by the Milky Way's gravity 2 billion years ago, when Earth's most-complex lifeforms were single-celled organisms.

Countries group into clusters as COVID-19 outbreak spreads
Mathematicians based in Australia and China have developed a method to analyze the large amount of data accumulated during the COVID-19 pandemic.

Exploring mass dependence in electron-hole clusters
A study published in EPJ B reveals that the behaviour of one type of three-particle cluster displays a distinct relationship with the ratio between the masses of its particles.

Age of NGC 6652 globular cluster specified
Senior Research Associate Margarita Sharina (Special Astrophysical Observatory) and Associate Professor Vladislav Shimansky (Kazan Federal University) studied the globular cluster NGC 6652.4.05957 and found out that its age is close to 13.6 billion years, which makes it one of the oldest objects in the Milky Way.

Study identifies regional malnutrition clusters across India
Childhood malnutrition in India remains a major problem. A new study shows that the problem is concentrated in specific geographic areas, which could help policymakers working to address the issue.

New aspects of globular glial tauopathy could help in the design of more effective drugs
This study, led by Dr. Isidre Ferrer, has described that protein inclusions that damage neurons and glial cells are responsible for the pathology showed by globular glial tauopathy patients.

Read More: Globular Clusters News and Globular Clusters Current Events
Brightsurf.com is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com.