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16 Sep 2020

Indian scientists find new model to probe how black holes rip apart stars

Scientists from the Indian Institute of Astrophysics (IIA) have found a new way to probe into supermassive black holes – detecting their properties like mass and spin by observing how they rip apart stars. They have found a model which can infer black hole mass, its spin by observing how the stars are ripped apart on coming to the vicinity of these astronomical bodies with high gravitational force found at the centre of some massive galaxies. Most black holes lead to isolated lives and are impossible to study. Astronomers study them by watching for their effects on nearby stars and gas. Stars are disrupted when the black hole's tidal gravity exceeds the star's self-gravity, and this phenomenon is called tidal disruption events (TDE). This model, which can be applied after the star is observed to be tidally disrupted, and an accretion disk is formed, will help in expanding our understanding of the physics besides building valuable statistics of the black hole mass and stellar mass. Supermassive black holes govern the movement of stars orbiting within their gravitational potential, and their tidal forces can disrupt or rip apart the stars that come to their vicinity.

21 Apr 2020

Rare crash of two mismatched black holes detected for the first time ever

In a major discovery, scientists have succeeded in detecting rare crash of two mismatched black holes for the first time ever. On April 12, 2019, a signal of space-time ripples was picked up by gravitational wave detectors. These ripples were caused by colliding black holes. The scientists then studied the detection closely and found that the detection did not match the signals seen by them so far.

05 Dec 2018

Biggest collision of black holes detected

The researchers detected the collisions after re-analyzing the gravitational wave data obtained by the LIGO.

18 Apr 2018

Space hum may reveal hidden black holes

Scientists have developed a new technology that can listen to background humming of deep space and unveil thousands of hidden black hole collisions missed by gravitational-wave detectors.

05 Apr 2018

Heart of Milky Way may host thousands of black holes: Study

There may be tens of thousands of black holes at the centre of the Milky Way Galaxy, say scientists who have discovered a dozen of them, lending support to a decades-old prediction.

26 Feb 2018

Most massive black holes ever in the Universe discovered

At the center of each of these galaxies – like virtually every other galaxy – lies a supermassive black hole, an area of space with an exceptionally high gravitational field.

10 Jan 2018

This is how supermassive black holes prevent star formation

The dwarf galaxies under observation were still accumulating gas which should re-start star formation in a red, dead galaxy but wasn't.

02 Jan 2018

The power of super massive black holes – They can halt star formation

The energy pouring into a galaxy from an active galactic nucleus is thought to turn off star formation by heating and dispelling the gas that would otherwise condense into stars.

08 Dec 2017

Voracious star-eaters black holes have weaker magnetic field: Study

The researchers found the magnetic energy around the black hole is about 400 times lower than previous crude estimates.

31 Oct 2017

Milky Way edges might be crowded with black holes

Conditions favourable for black-hole mergers exist in the outer gas disks of big spiral galaxies

04 Oct 2017

Instruments used in detection of gravitational waves can also unveil dark matter enigma

Calculations show that certain types of dark matter could form giant clouds around astrophysical black holes.

Gravitational waves

28 Sep 2017

Fourth gravitational wave signal detected – Five things you need to know

The latest observation was made on August 14, 2017. It's the first gravitational wave signal recorded by the Virgo detector.

19 Sep 2017

Supermassive black holes can form tightly bound pairs, says study

The study published in the journal Nature Astronomy sheds light on a class of black holes having a mass upwards of one million times the mass of the Sun.

09 Aug 2017

How many black holes does Milky Way have? Probably a 100 million, say scientists!

The new research was an attempt to interpret the gravitational wave detections through the lens of what is known about galaxy formation and to form a framework for understanding future occurrences.

28 Jun 2017

In a first, astronomers discover orbiting supermassive black holes

Last year, an international team of researchers detected the existence of gravitational waves, confirming German physicist Albert Einstein's 100-year-old prediction and astonishing the scientific community.

14 Jun 2017

NASA's SOFIA detects cool dust around active black holes!

SOFIA flies above 99 percent of the Earth's water vapour, enabling the research group to characterise the properties of the torus-shaped dust structures at far-infrared wavelengths.

CHina telescope

29 May 2017

Chinese space telescope to observe 'big eaters'

When a black hole swallows too much, the excess matter is converted into two jet-flows perpendicular to the accretion disk of the black hole, which is like a glutton with a bloated belly belching.

21 May 2017

Scientists decipher plot of the universe; largest map created!

In order to make their map, scientists used the Sloan Foundation Telescope to observe an unprecedented number of quasars.

09 Apr 2017

When did Milky Way's black hole have its final meal? Team led by Indian-origin scientist has the answer!

What the snacks consisted of is somewhat unclear.

28 Mar 2017

Stars born in winds from supermassive black holes discovered

Such galactic outflows are driven by the huge energy output from the active and turbulent centres of galaxies.

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