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New Study Shows That Binaries From Globular Clusters Can be Detected by LISA

The European Space Agency's next-generation Laser Interferometer Space Antenna (LISA) gravitational wave detector can potentially detect dozens of binary files in the globular clusters of the Milky Way, scientists say.

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In particular, these models suggest that the Kuiper Belt -- a cold region beyond the orbit of Neptune -- should contain a small fraction of rocky bodies from the inner solar system, such as carbon-rich asteroids, referred to as carbonaceous asteroids.
representational image, pixabay
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The European Space Agency’s next-generation Laser Interferometer Space Antenna (LISA) gravitational wave detector can potentially detect dozens of binary files in the globular clusters of the Milky Way, scientists say.

Globular clusters are dense environments containing millions of tightly packed stars and are efficient factories for gravitational wave sources.

LISA, which is expected to be in space in 2034, will be able to detect binary sources — pairs of orbiting compact objects.

These binary sources will contain all combinations of black hole, neutron star and white dwarf components.

While 150 globular clusters have been observed so far in the Milky Way, one out of every three clusters will produce a LISA source.
Representational image. Pixabay

LISA will also be sensitive to gravitational waves of a lower frequency than those detected by the Earth-bound Laser Interferometer Gravitational-Wave Observatory (LIGO)

“LISA is sensitive to Milky Way systems and will expand the breadth of the gravitational wave spectrum, allowing us to explore different types of objects that aren’t observable with LIGO,” said lead author Kyle Kremer, a doctoral student at the Northwestern University in Illinois, US.

While 150 globular clusters have been observed so far in the Milky Way, one out of every three clusters will produce a LISA source.

Approximately eight black hole binaries will be detectable by LISA in our neighbouring galaxy of Andromeda and another 80 in nearby Virgo, the study showed.

The research, published by the journal Physical Review Letters, is the first to use realistic globular cluster models to make detailed predictions of LISA sources.

Also Read: NASA Is Sending a Helicopter to Mars in 2020 

The team used more than a hundred fully evolved globular cluster models with properties similar to those of the observed globular clusters in the Milky Way.

The models were run on Quest, Northwestern’s supercomputer cluster. This powerful resource can evolve the full 12 billion years of a globular cluster’s life in a matter of days. (IANS)

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India Is Developing Technologies To Launch Manned Mission

The state-run ISRO’s technology demonstrator is the first in a series of tests to qualify as a crew escape system, critical for a manned mission.

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India’s dream to put a man in space
India’s dream to put a man in space. Pixabay

India is developing critical technologies for launching manned missions in space and preparing a document on it, a top official said on Saturday.

“Critical technologies are being developed for our human space programme as it is India’s dream to put a man in space. A mission document is in the making,” Indian Space Research Organisation (ISRO) Chairman K. Sivan told the media at an aerospace event here.

Citing the space agency’s successful maiden unmanned pad abort test on Thursday at its Sriharikota spaceport in Andhra Pradesh for the safe escape of the crew in an emergency, Sivan said that very complex technology was used for the trial, with a unique motor for fast-burning.

“The technology is very essential for our manned missions in the future, as the motor’s performance was very good. Using aerodynamics, the module was turned in a favourable direction to open the parachutes,” he said.

The state-run ISRO’s technology demonstrator is the first in a series of tests to qualify as a crew escape system, critical for a manned mission.

“We are only in the preparation stage. We need to develop much more. We are in the process of refining a document on the manned mission for review and interactions with stakeholders, including the Indian Air Force (IAF) and Hindustan Aeronautics Ltd (HAL),” said Sivan.

The crew escape system is an emergency escape measure designed to quickly pull the crew module along with the astronauts to a safe distance from the launch vehicle in the event of a launch abort.

The first pad abort test demonstrated the safe recovery of the crew module in case of any exigency at the launch pad,” ISRO said in a statement earlier.

Admitting that the scientists had to work on the next strategy for the manned mission testing, Sivan said ISRO’s work was two-pronged, with one on approved projects and the other for research and development (R&D).

The first pad abort test demonstrated the safe recovery of the crew module in case of any exigency at the launch pad,” ISRO said in a statement earlier.
The first pad abort test demonstrated the safe recovery of the crew module in case of any exigency at the launch pad,” ISRO said in a statement earlier. Flickr

“The pad abort test for the crew escape system is part of our R&D work,” he noted. The space agency also tested five new technologies during the pad abort test, as part of its strategy to develop long-term technologies.

“We and the government work on a three-year plan, with a seven-year strategy and a 15-year vision,” asserted Sivan.

Noting that space tourism would happen in the near future, the rocket scientist said it would take at least 15 years to develop the vehicle to go to space and return to the earth.

“We are not close to that. We need to work a lot towards achieving the dream of putting a man into space,” added Sivan.

After a five-hour countdown, the crew escape system lifted off with the 12.6 tonne simulated crew module from the spaceport and plunged into the sea (Bay of Bengal) 4 minutes and 19 seconds later with two parachutes, around 2.9 km away from Sriharikota, about 90km northeast of Chennai.

Also read: NASA Scientists Map Water on Moon Using India’s Chandrayaan-1 Spacecraft!

“The crew module soared 2.7 km altitude on thrust of its seven solid motors without exceeding the safe G (gravity) levels,” added the statement. (IANS)