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.
Agencies
May 22,2020

Kochi, May 22: During the nationwide COVID-19 lockdown, Kerala recorded the highest number of cyber attacks followed by Punjab and Tamil Nadu, a study by anti-virus software firm K7 Computing said on Thursday.

In a statement issued in Chennai, the company said its K7 Computing's Cyber Threat Report, a comprehensive analysis of cyber attacks during the lockdown has found that Kerala recorded the highest number of cyber attacks during this period. The report analyses various cyber attacks within India during the pandemic and reveals that threat actors targeted the state with COVID-themed attacks aimed at exploiting user trust.

In Kerala, regions like Kottayam, Kannur, Kollam, and Kochi saw the highest hits with 462, 374, 236, and 147 attacks respectively, while the state as a whole saw around 2,000 attacks during the period - the highest thus far in the country.

This was followed by Punjab with 207 attacks and Tamil Nadu with 184 attacks, the company said.

The sudden surge in the frequency of attacks witnessed from February 2020 to mid-April 2020 indicates that scamsters across the world were exploiting the widespread panic around coronavirus at both the individual and corporate level.

These attacks aimed to compromise computers and mobile devices to gain access to users' confidential data, banking details, and cryptocurrency accounts.

The key threats seen during this period ranged from phishing attacks to rogue apps disguised as COVID-19 information apps that targeted users' sensitive data. Phishing attacks were noticed more in Tier-II and Tier-III cities while the metros fared better. Smaller cities saw over 250 attacks being blocked per 10,000 users.

Users from Ghaziabad and Lucknow seem to have faced almost 6 and 4 times the number of attacks as Bengaluru users.

According to the statement, a majority of the recorded attacks were phishing attacks with sophisticated campaigns that could easily snare even the most educated users. These attacks were aimed at heightening users' fears and creating a sense of urgency to take action.

K7 Labs noticed phishing attacks where scamsters posed as representatives of the United States Department of Treasury, the World Health Organization (WHO), and the Centres for Disease Control and Prevention (CDC), the company said.

Users were encouraged to visit links that would automatically download malware on the host computer such as the Agent Tesla keylogger or Lokibot information-stealing malware, infamous banking Trojans such as Trickbot or Zeus Sphinx, and even disastrous ransomware.

Other attacks included infected COVID-19 Android apps like CoronaSafetyMask that scam users with promises of masks for an upfront payment; the spyware app Project Spy; and seemingly genuine apps that are infected with dangerous malware like banking Trojans such as Ginp, Anubis and Cerberus.

"Covid-19 has created an ideal situation for various threat actors to target individuals and enterprises alike. The panic caused by the stringent lockdown measures and rapid spread of this virus has left many people looking for more information on the situation," J. Kesavardhanan, Founder and CEO of K7 Computing was quoted as saying in the statement.

"Threat actors exploit this fear to their advantage and scam users into downloading malicious software and divulging sensitive information like banking codes. The need to be cyber cautious has never been greater. This is more so in the case of corporates who have adopted a work from home policy hurriedly without adequate cyber hygiene. We have seen an increase in attacks on enterprises and SME employees as well," he added.

Such attacks are expected to continue till normalcy returns. Social engineering attacks targeted at winning users' trust will gain momentum.

Healthcare institutions, well-known government offices, and international organisations will continue to be a prime target throughout the pandemic, the statement said.

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 10,2020

New Delhi, May 10: The Delhi government has asked district magistrates to release 2,446 Tablighi Jamaat members from quarantine centres and ensure that they do not stay in any other place except their homes.

The district magistrates will explore the possibility of sending those Tablighi members, who belong to other states, in buses to their designated places in accordance with social distancing norms and other protocols, DDMA Special CEO K S Meena said in a letter to deputy commissioners (administration).

As man as 567 foreign attendees of the congregation held in Delhi's Nizamuddin area in March, will be handed over to the police, Meena said.

"They (foreign Jamaat attendees) will be handed over to police in connection with several violations like visa violation," a government official said on Saturday.

Delhi Home Minister Satyendar Jain had recently ordered the release of Tablighi members who have completed their required quarantine period in centres and tested negative for COVID-19.

"Out of such people belonging to Delhi, who could be released as per prescribed guidelines should be issued passes to travel from the quarantine centres.

"Under no circumstances, the aforesaid persons should be allowed to stay in any other places including mosques," Meena said in the letter.

In respect of those Tablighi members belonging to other states, it should be ensured by the nodal officer and the area ACP that such people reach their place of residence, he also said.

"The DC should also inform the respective resident commissioner of their states in respect of each and every movement of such persons from Delhi," the Delhi Disaster Management Authority (DDMA) Special CEO said.

Thousands of Tablighi Jamaat members had been taken out of its Markaz (centre) in Nizamuddin, where they had gathered for a religious congregation, and quarantined as the area became a major hotspot after a number of members tested positive for coronavirus.

On March 31, the Delhi Police's Crime Branch had lodged an FIR against seven people, including Maulana Saad Kandhalvi, on a complaint by Station House Officer, Nizamuddin, for holding the congregation.

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
February 21,2020

Aurangabad, Feb 21: The All India Majlis-e-Ittehad-ul-Muslimeen (AIMIM) will seek an explanation from its leader Waris Pathan over his alleged '15 crore Muslims can be heavy on 100 crore' remark he recently made in Karnataka, a party leader said here on Friday.

Pathan had made the purported remarks while addressing an anti-Citizenship (Amendment) Act (CAA) rally at Kalaburagi in North Karnataka on February 16.

"We have to move together. We have to take Azadi (freedom), things that we don't get by asking, we have to take it by force, remember it...(We maybe) 15 crore, but are heavy on 100 (crore), remember it," Pathan can be heard purportedly saying in a video of his speech that has gone viral.

Talking to reporters here, AIMIM's Maharashtra unit chief and Aurangabad MP Imtiyaz Jaleel said, "Our party does not support the statement made by Waris Pathan. The party will seek an explanation from him over the remarks."

"If needed, we will come out with a set of dos and don'ts for the party workers to be while giving speech," he said.

"BJP leaders Anurag Thakur and Yogi Adityanath had also given some hateful statements, but none questioned them about it," Jaleel added.

On Thursday, a young woman had raised "Pakistan Zindabad" slogan in Bengaluru during a protest against CAA, NRC and NPR, where AIMIM chief Asaduddin Owaisi was also present. Owaisi had denounced her action.

Talking about the incident, Jaleel said, "That event was not organised by the AIMIM. It was organised by JD(S) and leaders of all parties were there. Asaduddin Owaisi stopped the woman and also condemned her act. But it is being projected that it was AIMIM's stage."

Meanwhile, the BJP and the Raj Thackeray-led Maharashtra Navnirman Sena (MNS) held protests in Aurangabad against Pathan, seeking stern action against him.

The BJP protested in Gulmandi area and burnt an effigy of Pathan.

"Waris Pathan has hurt the feelings of 100 crore people. He has tried to divide the people of the country. The state government should take action against him and send him out of Mumbai," BJP MLA Atul Save said.

The MNS took out a symbolic funeral procession of Pathan and raised slogans against the AIMIM.

"The language of Waris Pathan was disgusting. He should be banned from giving public speeches in the state and also be arrested," MNS lader Prakash Mahajan said.

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.