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

Agencies
March 15, 2019

Washington, Mar 15: Astronomers have discovered 83 quasars powered by supermassive black holes 13 billion light-years away from the Earth, from a time when the universe was less than 10 per cent of its present age.

“It is remarkable that such massive dense objects were able to form so soon after the Big Bang,” said Michael Strauss, a professor at Princeton University in the US.

“Understanding how black holes can form in the early universe, and just how common they are, is a challenge for our cosmological models,” Strauss said in a statement.

This finding, published in The Astrophysical Journal, increases the number of black holes known at that epoch  considerably, and reveals, for the first time, how common they are early in the universe’s history.

In addition, it provides new insight into the effect of black holes on the physical state of gas in the early universe in its first billion years.

Supermassive black holes, found at the centers of galaxies, can be millions or even billions of times more massive than the Sun.

While they are prevalent today, it is unclear when they first formed, and how many existed in the distant early universe.

A supermassive black hole becomes visible when gas accretes onto it, causing it to shine as a “quasar.” Previous studies have been sensitive only to the very rare, most luminous quasars, and thus the most massive black holes.

The new discoveries probe the population of fainter quasars, powered by black holes with masses comparable to most black holes seen in the present-day universe.

The team used data taken with “Hyper Suprime-Cam” (HSC) instrument, mounted on the Subaru Telescope of the National Astronomical Observatory of Japan, which is located on the summit of Maunakea in Hawaii.

The researchers selected distant quasar candidates from the sensitive HSC survey data.

They then carried out an intensive observational campaign to obtain spectra of those candidates, using three telescopes: the Subaru Telescope; the Gran Telescopio Canarias on the island of La Palma in the Canaries, Spain; and the Gemini South Telescope in Chile.

The survey revealed 83 previously unknown very distant quasars.

Comments

ABDUL AZIZ SHE…
 - 
Saturday, 16 Mar 2019

SUBHAANALLAH

 

 
ALLAH ALMIGHTY CREATED EVERTHING  INCLUDING WHOLE UNIVERSE AND WHAT IS IN IT,

HUMAN BEING CANNOT REACH TO UNDERSTAND IT,  HUMAN LIFE NOT SUFFEICENT TO REACH AND KNOW EVERYTHING.

Add new comment

  • Coastaldigest.com reserves the right to delete or block any comments.
  • Coastaldigset.com is not responsible for its readers’ comments.
  • Comments that are abusive, incendiary or irrelevant are strictly prohibited.
  • Please use a genuine email ID and provide your name to avoid reject.
News Network
May 6,2024

Mangaluru, May 6: A five-year-old girl from Arendur village of Siddapura taluk of Uttara Kannada district died of Kyasanur Forest Disease (monkey fever) recently.

As her health deteriorated, she was admitted to the KMC Hospital in Mangaluru, where she failed to respond to the treatment and died on Friday night.

It is learned that the KFD is slowly spreading to the newer areas of coastal and malnad areas of Karnataka

According to officials, KFD spreads due to bites of ticks that generally survive on monkeys. This tick bites humans which causes the infection. Humans also contract the disease by coming in contact with cattle bitten by ticks.

Comments

Add new comment

  • Coastaldigest.com reserves the right to delete or block any comments.
  • Coastaldigset.com is not responsible for its readers’ comments.
  • Comments that are abusive, incendiary or irrelevant are strictly prohibited.
  • Please use a genuine email ID and provide your name to avoid reject.
News Network
May 12,2024

gazaground.jpg

Israeli military tanks have started to go deeper into the Jabalia refugee camp in northern Gaza as part of a ground offensive months after claiming Hamas had been “dismantled” in the area.

Israeli forces are “carpet-bombing” the eastern areas of Jabalia refugee camp in the northern Gaza Strip, killing and wounding several Palestinians, Al-Jazeara reported citing local sources on Sunday.

Israeli military tanks have advanced further into the Jabalia refugee camp, crossing Salah al-Din Street amidst ongoing battles with Hamas fighters, reports added.

Media quoted eyewitnesses as saying that the tanks are surrounding evacuation centers and residential buildings in the densely populated area, leading to mass evacuations and displacement towards the western part of Gaza City.

Also, Israeli drones targeted ambulances near the clinic run by the United Nations Relief and Works Agency for Palestine Refugees (UNRWA) in Jabalia, according to Mahmoud Basal, the spokesperson for the civil defense directorate in Gaza.

Basal stated that emergency crews in Rafah, al-Zaytounm, al-Sabra, and Jabalia have been inundated with distress calls, confirming that these areas were subjected to overnight bombardment.

Shortage of oxygen for patients

Imad Abu Zayda, an emergency doctor in Jabalia, warned of the critical conditions prevailing there due to the recent Israeli aggression in the area.  

“No light due to the lack of fuel and there’s no medical supplement available as Israel has expanded their operation in the area. We have no oxygen to give to patients,” he said.

He added that the majority of those injured are children and women, and the medical team is grappling with limited resources to provide essential care.

All hospitals in the northern Gaza Strip are now out of service, following a warning from the UN about the risk of running out of fuel in hospitals across the region.

Israel’s closure of the Rafah crossing has also prevented aid trucks from entering the area since May 5.

The Jabalia refugee camp, established in 1948 to accommodate Palestinians who were displaced after the Nakba, or catastrophe, which refers to the ethnic cleansing of Palestine in 1948, has become the most densely populated refugee camp in the Gaza Strip.

With over 750,000 Palestinians forcefully displaced, this camp stands as a testament to the birth of Israel in 1948.

Since the start of the Israeli war on the Gaza Strip on October 7, Israeli forces carried out several attacks on Jabilia camp, leaving it in ruins by intense bombardment.

In early February, Israeli forces withdrew from the camp claiming it had destroyed Hamas as a fighting force in the northern areas.

On Saturday, the Israeli military ordered residents of the Jabalia Refugee Camp to evacuate “immediately”, as it prepares to launch military operations against Hamas.

However, the displaced residents have no place to seek refuge, as the UN reports a severe famine in the region.

Since the start of the offensive, the Tel Aviv regime has killed more than 34,971 Palestinians and injured more than 78,641 others, mostly women and children.

Comments

Add new comment

  • Coastaldigest.com reserves the right to delete or block any comments.
  • Coastaldigset.com is not responsible for its readers’ comments.
  • Comments that are abusive, incendiary or irrelevant are strictly prohibited.
  • Please use a genuine email ID and provide your name to avoid reject.
News Network
May 11,2024

prakashhindu.jpg

Madikeri, May 11: Kodagu police have apprehended the man allegedly responsible for the brutal murder of a minor girl within the confines of Kumbaragadige village in Karnataka's Somwarpet taluk. 

Kodagu Superintendent of Police, K Ramarajan, disclosed that the arrested individual is Prakash (32) from Hammiyala village in Somwarpet taluk. However, authorities are still in the process of recovering the severed head of the victim. The perpetrator had absconded with the victim's severed head after committing the crime. 

Search operations for the suspect commenced late on Thursday night (May 9), with officials diligently pursuing leads. Acting on information suggesting the suspect's presence in a forested area near the village, the police swiftly moved in and apprehended him.

The victim US Meena, 15, a student of Surlabbi High School, had passed the SSLC examinations, the results of which were announced on May. One same day, she was murdered. 

Reportedly, the engagement of the minor girl with the suspect was thwarted by officials from the Women and Child Development department. Subsequently, officials persuaded the girl's parents against proceeding with the marriage. 

However, despite these interventions, the suspect forcibly entered her residence during the night, purportedly abducted her, and later perpetrated the heinous crime in a wooded area on the outskirts of the forest, before absconding with her severed head.

Comments

Add new comment

  • Coastaldigest.com reserves the right to delete or block any comments.
  • Coastaldigset.com is not responsible for its readers’ comments.
  • Comments that are abusive, incendiary or irrelevant are strictly prohibited.
  • Please use a genuine email ID and provide your name to avoid reject.