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
November 19,2024

vikramgowda.jpg

The Karnataka Police’s Anti-Naxal Force (ANF) achieved a major breakthrough on Monday night by eliminating Vikram Gowda, one of Karnataka’s most wanted Naxal leaders for over two decades. The encounter occurred in the dense Kabbinale forest of Udupi district, marking a significant victory against Naxal insurgency in the region.

Who Was Vikram Gowda?

Hailing from Hebri in Udupi, Vikram Gowda, 44, was a prominent figure in the Naxal movement. He went underground in 2002, initially serving as a courier and fund collector before rising to lead a breakaway Naxal group. Despite having only a fourth-grade education, he was a staunch advocate for tribal rights and a key player in the movement’s survival in Karnataka.

Bounty: ₹3 lakh from Karnataka and ₹50,000 from Kerala.

Legacy: The last major Naxal leader in Karnataka after the 2021 arrest of B G Krishnamurthy.

The Encounter

Police revealed that Gowda and his team visited Kabbinale village to collect groceries on Monday night. Acting on a tip-off, ANF ambushed the group. When the Naxals opened fire, ANF responded, leading to Gowda's death.

Escapees: Three Naxals fled, including prominent members Latha (aka Mundgaru Latha) and Raju.

Significance: This was the first Naxal casualty in Karnataka in over two decades.

Home Minister G. Parameshwara confirmed the operation, stating, “Gowda was elusive for 20 years, escaping multiple encounters. His death is a critical step in dismantling Naxal operations in the region.”

The Decline of Naxal Activity in Karnataka

Karnataka's Naxal movement has been dwindling, with members seeking refuge in Kerala and Tamil Nadu. The group’s strength had reduced to just 19 members by 2018, but recent sightings indicate attempts at revival:

2023 Activity: Reports of Gowda-led movements in the Kodagu and Hassan districts reignited concerns.

Political Heat: The BJP criticised the Congress government, alleging it created a “safe haven” for Naxals.

A Glimpse into Gowda’s Past

Personal Life: Gowda’s ex-wife, Savitri (alias Rajita), was arrested in 2021. She was a senior Naxal commander involved in insurgency since 2004.
Rehabilitation Efforts: Since 2013, Karnataka’s rehabilitation policy has seen 14 Naxals surrender and reintegrate into mainstream society.

A Milestone in Karnataka’s Fight Against Insurgency

The operation signifies a decisive blow to Naxal resurgence in the Western Ghats. While the ANF continues its search for escapees, the Karnataka government reaffirmed its commitment to offering rehabilitation to those willing to surrender.

As Karnataka celebrates this triumph, the message is clear: there is no room for insurgency in the state.

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
November 11,2024

Mangaluru: Six youths including teenagers have been arrested by the Bantwal Rural Police in connection with a brutal assault on 21-year-old Aboobakar (name changed to hide identity), an incident that was widely shared on social media after footage revealed the victim tied to a pole and violently beaten.

The arrested individuals, all from Kanchinadkapadavu, Sajipanadu village in Ullal Taluk, have been identified as Mohammad Sapwan (25), Mohammad Rizwan (25), Irfan (27), Anis Ahmad (19), Nasir (27), and Shakeer (18). According to police reports, the assault took place on November 7 in Kanchinadkapadavu.

The sequence of events began when Aboobakar was reportedly called to a residence in Kanchinadkapadavu by a female relative. Upon his arrival, he was confronted by the accused, who questioned his presence, tied him to a pole with ropes, and attacked him while he was shirtless. 

Aboobakar managed to file a police complaint the following day, detailing the assault. As his injuries worsened, he was admitted to a private hospital in Mangaluru.

While in the hospital, Aboobakar alleged that his attackers intended to kill him during the assault. This statement led to additional charges of attempted murder being filed. 

Police officials stated that the suspects were subsequently apprehended, charged with group assault and attempted murder, and placed in judicial custody. The investigation is ongoing, and further details are awaited.

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
November 11,2024

hospital.jpg

Mangaluru: In a deeply tragic turn of events, a 28-year-old woman named Ranjitha, who had recently given birth but tragically lost her newborn, ended her life by suicide on Monday. She reportedly leapt from the fourth-floor window of Lady Goschen Hospital’s luggage room.

Ranjitha, whose strength and resilience had carried her through a difficult pregnancy, was scheduled for discharge on Monday. Her journey to Lady Goschen Hospital began on October 24, when she was transferred from Karkala. She was a high-risk patient, battling both hypertension and diabetes. At the time of her admission, she was just 27 weeks pregnant.

Due to the complexities of her health, doctors made the difficult decision to perform an emergency C-section on October 30. She delivered a baby girl, premature and weighing only 960 grams. The newborn was immediately moved to the Neonatal Intensive Care Unit, where doctors did all they could. Despite these efforts, the baby passed away on November 3.

Ranjitha’s sorrow was profound. She stayed under hospital care even after her initial recovery and was preparing to go home on November 9. She had even requested a couple more days at the hospital, seeking time perhaps to cope with her unimaginable grief.

On the day of her discharge, a discharge card ready and her family eagerly waiting to take her home, Ranjitha reportedly made her way to the luggage room in the early hours. There, standing on a cot placed for patients' family members, she climbed to a window and fell from the fourth floor. Despite the attempts of another visitor to intervene, tragedy was inevitable. She was rushed to Government Wenlock Hospital, where doctors confirmed the worst—she was no more.

Dr. Durgaparasad M R, the Medical Superintendent at Lady Goschen Hospital, shared his grief and spoke of the ongoing investigation. A post-mortem is to be conducted, and the local Tahsildar will complete the necessary inquest procedures. Ranjitha’s exact reasons for taking this step are yet to be confirmed, though the weight of her recent losses paints a sorrowful picture.

If you or anyone you know is struggling emotionally, please remember that help is available. Reach out to mental health experts who can provide support and guidance. The toll-free helpline number 9152987821 is available to assist anyone in distress.

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.