Astronomers discover 83 supermassive black holes 13 billion light-years away

New Delhi. May 26: 6,535 more coronavirus cases have been reported in India in the last 24 hours, taking the total number of COVID-19 cases in the country to 1,45,380, informed Union Ministry of Health and Family Welfare on Tuesday.

Out of the total, at present, there are 80,722 active cases in the country. So far, 60,490 people have been cured/discharged and 4167 have died due to the lethal infection.

According to the data compiled by the Centre, Maharashtra has so far recorded the maximum number of cases of COVID-19 across the country with 52,667 people.

The tally of cases in Tamil Nadu has risen to 17,082. While Gujarat has recorded 14,460 cases of the infection so far.

There are 14,073 cases of coronavirus in the national capital.

New Delhi, May 20: With 5,611 new cases reported in the last 24 hours, India's COVID-19 tally reached 1,06,750 on Wednesday, according to the Union Ministry of Health and Family Welfare.

As many as 140 deaths have been reported in the last 24 hours, taking the total number of deaths to 3,303.

Out of the total cases, 61,149 are actives cases and 42,298 patients have been cured/discharged/migrated.

Maharashtra continues to remain the worst-affected state with 37,136 cases, followed by Tamil Nadu (12,448 cases), Gujarat (12,140 cases), and Delhi (10,554 cases).

The nationwide lockdown imposed as a precautionary measure to contain the spread of coronavirus has been extended till May 31.

Washington D.C., Feb 6: An international team of astronomers has found an unusual monster galaxy that existed about 12 billion years ago when the universe was only 1.8 billion years old.

The team of astronomers was led by scientists at the University of California, Riverside.

Dubbed XMM-2599, the galaxy formed stars at a high rate and then died. Why it suddenly stopped forming stars is unclear.

"Even before the universe was 2 billion years old, XMM-2599 had already formed a mass of more than 300 billion suns, making it an ultra massive galaxy," said Benjamin Forrest, a postdoctoral researcher in the UC Riverside Department of Physics and Astronomy and the study's lead author.

"More remarkably, we show that XMM-2599 formed most of its stars in a huge frenzy when the universe was less than 1 billion years old and then became inactive by the time the universe was only 1.8 billion years old," Forrest added.

The team used spectroscopic observations from the W. M. Keck Observatory's powerful Multi-Object Spectrograph for Infrared Exploration or MOSFIRE, to make detailed measurements of XMM-2599 and precisely quantify its distance.

The study results appear in the Astrophysical Journal.

"In this epoch, very few galaxies have stopped forming stars, and none are as massive as XMM-2599," said Gillian Wilson, a professor of physics and astronomy at UCR in whose lab Forrest works.

"The mere existence of ultramassive galaxies like XMM-2599 proves quite a challenge to numerical models. Even though such massive galaxies are incredibly rare at this epoch, the models do predict them."

"The predicted galaxies, however, are expected to be actively forming stars. What makes XMM-2599 so interesting, unusual, and surprising is that it is no longer forming stars, perhaps because it stopped getting fuel or its black hole began to turn on. Our results call for changes in how models turn off star formation in early galaxies," the professor stated.

The research team found XMM-2599 formed more than 1,000 solar masses a year in stars at its peak of activity -- an extremely high rate of star formation. In contrast, the Milky Way forms about one new star a year.

"XMM-2599 may be a descendant of a population of highly star-forming dusty galaxies in the very early universe that new infrared telescopes have recently discovered," said Danilo Marchesini, an associate professor of astronomy at Tufts University and a co-author on the study.

"We have caught XMM-2599 in its inactive phase," Wilson said, who led the W. M. Keck Observatory data acquisition
Co-author Michael Cooper, a professor of astronomy at UC Irvine, said this outcome is a strong possibility.

"Perhaps during the following 11.7 billion years of cosmic history, XMM-2599 will become the central member of one of the brightest and most massive clusters of galaxies in the local universe," he said.

"Alternatively, it could continue to exist in isolation. Or we could have a scenario that lies between these two outcomes," he stated.

The study was supported by grants from the National Science Foundation and NASA.