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.

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News Network
April 17,2020

The coronavirus pandemic has sickened more than 2,425,000 people, according to official counts. So far at least 164,000 people have died, and the virus has been detected in at least 177 countries, as the following table shows.

United States 

780,330

37,782

Spain

200,210

20,852

Italy 

181,228

24,114

Germany

141,672

4,404

U.K.

124,743

16,509

France

114,657

20,265

Turkey

90,980

2,140

Mainland China

88,466

4,632

Iran

83,505

5,209

Russia

47,121

405

Brazil

40,743

2,587

Belgium

39,983

5,828

Canada

36,823

1,690

Netherlands

33,405

3,751

Switzerland

27,944

1,142

Portugal

20,863

735

India

18,539

592

Peru

16,325

445

Ireland

15,652

687

Austria

14,795

470

Sweden

14,777

1,580

Israel

13,713

177

Japan

10,915

168

South Korea

10,674

236

Chile

10,507

139

Saudi Arabia

10,484

103

Ecuador

10,128

507

Poland

9,593

380

Romania

8,936

478

Mexico

8,772

712

Pakistan

8,418

176

Singapore

8,014

11

Denmark

7,515

364

U.A.E.

7,265

43

Norway

7,156

181

Czech Republic

6,900

194

Indonesia

6,760

590

Serbia

6,630

125

Australia

6,625

71

Philippines

6,459

428

Belarus

6,264

51

Qatar

6,015

9

Ukraine

5,710

151

Malaysia

5,425

89

Dominican Rep.

4,964

235

Panama

4,467

126

Colombia

3,977

189

Finland

3,868

98

Luxembourg

3,558

75

Egypt

3,333

250

South Africa

3,300

58

Morocco

3,046

143

Bangladesh

2,948

101

Argentina

2,941

136

Thailand

2,792

47

Algeria

2,718

384

Moldova

2,548

70

Greece

2,245

116

Kuwait

1,995

9

Hungary

1,984

199

Bahrain

1,907

7

Croatia

1,881

47

Kazakhstan

1,852

19

Iceland

1,773

10

Uzbekistan

1,627

5

Iraq

1,574

82

Estonia

1,535

40

New Zealand

1,440

12

Azerbaijan

1,436

19

Oman

1,410

7

Armenia

1,339

22

Slovenia

1,335

77

Lithuania

1,326

37

Bosnia and Herzegovina

1,309

49

North Macedonia

1,225

54

Slovakia

1,173

13

Cameroon

1,163

42

Cuba

1,087

36

Ghana

1,042

9

Afghanistan

1,026

36

Hong Kong

1,025

4

Bulgaria

929

43

Tunisia

884

38

Ivory Coast

847

9

Djibouti

846

2

Cyprus

772

12

Latvia

739

5

Andorra

717

37

Lebanon

677

21

Nigeria

665

22

Costa Rica

662

6

Niger

648

20

Guinea

622

5

Albania

584

26

Burkina Faso

581

38

Kyrgyzstan

568

7

Bolivia

564

33

Uruguay

535

10

Kosovo

510

12

Channel Islands

488

24

Honduras

477

46

San Marino

462

39

West Bank & Gaza

449

3

Malta

431

3

Jordan

425

7

Taiwan

422

6

Georgia

402

4

Senegal

377

5

Congo

332

25

Mauritius

328

9

Montenegro

312

5

Sri Lanka

304

7

Isle of Man

300

9

Guatemala

289

7

Kenya

281

14

Vietnam

268

Venezuela

256

9

Tanzania

254

10

Mali

246

14

Somalia

237

8

Jamaica

223

5

El Salvador

218

7

Paraguay

208

8

Faroe Islands

185

Republic of the Congo

160

6

Rwanda

147

Brunei

138

1

Gibraltar

132

Cambodia

122

Madagascar

121

Gabon

120

1

Myanmar

119

5

Trinidad and Tobago

114

8

Ethiopia

111

3

Sudan

107

12

Liberia

99

8

Aruba

97

2

Monaco

94

3

Bermuda

86

5

Togo

84

6

Liechtenstein

81

1

Equatorial Guinea

79

Barbados

75

5

Maldives

69

Cape Verde

67

1

Sint Maarten

67

10

Cayman Islands

66

1

Guyana

65

7

Zambia

65

3

Bahamas

60

9

Haiti

57

3

Uganda

56

Benin

54

1

Libya

51

1

Guinea-Bissau

50

Macau

45

Sierra Leone

43

Eritrea

39

Mozambique

39

Syria

39

3

Chad

33

Mongolia

33

Nepal

31

Zimbabwe

25

3

Angola

24

2

Eswatini

24

1

Antigua and Barbuda

23

3

Timor-Leste

22

Botswana

20

1

Laos

19

Belize

18

2

Fiji

18

Malawi

17

2

Dominica

16

Namibia

16

Saint Kitts and Nevis

15

Saint Lucia

15

Curaçao

14

1

Grenada

14

Central African Republic

12

Saint Vincent and the Grenadines

12

Falkland Islands

11

Greenland

11

Montserrat

11

Seychelles

11

Turks and Caicos Islands

11

1

Gambia

10

1

Nicaragua

10

2

Suriname

10

1

Vatican City

9

Mauritania

7

1

Papua New Guinea

7

Western Sahara

6

Bhutan

5

British Virgin Islands

5

1

Burundi

5

1

South Sudan

4

São Tomé and Príncipe

4

Anguilla

3

Yemen

1

 

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News Network
January 30,2020

New Delhi, Jan 30: Tension spiralled in Jamia Nagar on Thursday after a man fired a pistol at a group of anti-CAA protesters, injuring a Jamia Millia Islamia student before walking away while waving the firearm above his head and shouting "Yeh lo aazadi" amid heavy police presence in the area.

Massive protests erupted in the area after the incident with hundreds of agitated people gathering near the university, breaking barricades and clashing with police personnel.

The man, who identified himself as "Rambhakt Gopal", was subsequently overpowered by police and detained. He was taken into custody and was being interrogated, police said.

The entire drama, which triggered panic in the area, was captured by television cameras that showed the man in light coloured pants and a dark jacket, walking away on an empty road barricaded by police, turning around and shouting at the protesters in Hindi, "Here, take this freedom."

The gunman went live on Facebook before the brandishing the gun. Police said they were verifying whether it is his real name.

Before the attack, the man also put out messages on Facebook stating "Shaheen Bhag Khel Khatam" (Run Shaheen, the game is over). Another message stated, "Please wrap me in saffron in my last journey with slogans of Jai Shri Ram". His Facebook profile was deleted after screenshots of his posts were circulated widely on social media platforms.

Several students recapped how their peaceful march on Gandhi's death anniversary became violent.

"We were moving towards the Holy Family Hospital where the police had raised barricades. Suddenly, a gun-wielding man came out and opened fire. One bullet hit my friend's hand," Aamna Asif, a student of economics at the university, told PTI.

She said her friend, Shadab Farooq, a mass communication student, was trying to calm the attacker but he shot at him injuring his left hand.

Farooq, who belongs to Kashmir, was taken to the AIIMS Trauma Centre.

Ragibh Naushad, an LLB student at the university, said, "The Jamia Coordination Committee organised a march to pay homage to Gandhi ji on his death anniversary. It started at 12 noon from Gate number 7, but police denied the permission and stopped the march near the Holy Family hospital.

"A man named Gopal, came there and started brandishing a weapon and later shot a round. He was also chanting pro-CAA slogans."

The incident led to panic in the area.

Khalid Hassan, a JMI alumnus, said initially many were not sure whether it was a gunshot or a tyre burst.

There was heavy police and media presence when the incident took place.

The students were heading from Jamia to Mahatma Gandhi's memorial Rajghat. The march was stopped at the Holy Family Hospital near the university.

Chinmoy Biswal, DCP (southeast), said the students wanted to take out a march from Jamia to Rajghat but were denied permission.

"They were being repeatedly told that the protest should be carried out peacefully. We had barricaded the road just before the Holy Family hospital. Meanwhile, a person was seen in the crowd who waved something which appeared to be a weapon."

"We have detained him and are interrogating him. One person has also been injured," Biswal said.

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News Network
February 4,2020

New Delhi, Feb 4: The investigation into the incident of violence at Jamia Millia Islamia during an anti-citizenship law protest was at a crucial stage, the Centre told the Delhi High Court on Tuesday.

The submission before a bench of Chief Justice D N Patel and Justice C Hari Shankar was made by Solicitor General Tushar Mehta while seeking more time to file a report regarding the probe.

Taking note of the submission, the bench granted the Centre time till April 29 to file a reply.

During the hearing, senior advocate Colin Gonsalves, appearing for some students of Jamia, said 93 students and teachers filed complaints about alleged attacks on them by police but no FIR has been filed against the agency till date.

The other lawyers for the petitioners alleged that the government has not complied with the court order to file a response within four weeks of the last date of hearing on December 19.

The bench, however, declined to pass any interim order and granted time till April 29 to the government to file a reply.

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