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

Patna, Jan 23: "They should go wherever they want," Bihar Chief Minister and JDU supremo Nitish Kumar said on Thursday when asked of Prashant Kishor and Pavan Verma's repeated questions about the party's stand's on the newly enacted Citizenship Act.

"It is their personal decision. They should go wherever they want. We don't have an objection. Don't look at JDU in the context of statements by some people. JDU works with determination. We have a clear stand and don't have any confusion," the Chief Minister told reporters here.

"If they have something to tell, they should come and discuss it within the party. They should go wherever they want. They have my good wishes," he said.

JDU spokesperson and national general secretary Pavan Verma has questioned his party's alliance with the BJP in Delhi Assembly polls while Kishor has more than once made his differences with the party known on the issue of the amended Citizenship Act, and National Register of Citizens.

Leiden, Jul 2: Astronomers have discovered a luminous galaxy caught in the act of reionizing its surrounding gas only 800 million years after the Big Bang.

The research, led by Romain Meyer, PhD student at UCL in London, UK, has been presented at the virtual annual meeting of the European Astronomical Society (EAS).

Studying the first galaxies that formed 13 billion years ago is essential to understanding our cosmic origins. One of the current hot topics in extragalactic astronomy is 'cosmic reionization,' the process in which the intergalactic gas was ionized (atoms stripped of their electrons).

Cosmic reionization is similar to an unsolved murder: We have clear evidence for it, but who did it, how and when? We now have strong evidence that hydrogen reionization was completed about 13 billion years ago, in the first billion years of the universe, with bubbles of ionized gas slowly growing and overlapping.

The objects capable of creating such ionized hydrogen bubbles have however remained mysterious until now: the discovery of a luminous galaxy in which 60-100 percent of ionizing photons escape, is likely responsible for ionizing its local bubble. This suggests the case is closer to being solved.

The two main suspects for cosmic reionization are usually 1) a population of numerous faint galaxies leaking ~10 percent of their energetic photons, and 2) an 'oligarchy' of luminous galaxies with a much larger percentage (>50 percent) of photons escaping each galaxy.

In either case, these first galaxies were very different from those today: galaxies in the local universe are very inefficient leakers, with only <2-3 percent of ionizing photons escaping their host. To understand which galaxies governed cosmic reionization, astronomers must measure the so-called escape fractions of galaxies in the reionization era.

The detection of light from excited hydrogen atoms (the so-called Lyman-alpha line) can be used to infer the fraction of escaping photons. On the one hand, such detections are rare because reionization-era galaxies are surrounded by neutral gas which absorbs that signature hydrogen emission.

On the other hand, if this hydrogen signal is detected it represents a 'smoking gun' for a large ionized bubble, meaning we have caught a galaxy reionizing its surroundings. The size of the bubble and the galaxy's luminosity determines whether it is solely responsible for creating this ionized bubble or if unseen accomplices are necessary.

The discovery of a luminous galaxy 800 million years after the Big Bang supports the scenario where an 'oligarchy' of bright leakers emits most of the ionizing photons.

"It is the first time we can point to an object responsible for creating an ionized bubble, without the need for a contribution from unseen galaxies.

Additional observations with the upcoming James Webb Space Telescope will enable us to study further what is likely one of the best suspects for the unsolved case of cosmic reionization," said Meyer.

New Delhi, Jul 15: Air India has started the process of identifying employees, based on various factors like efficiency, health and redundancy, who will be sent on compulsory leave without pay (LWP) for up to five years, according to an official order.

The airline's board of directors have authorised its Chairman and Managing Director Rajiv Bansal to send employees on LWP "for six months or for a period of two years extendable upto five years, depending upon the following factors - suitability, efficiency, competence, quality of performance, health of the employee, instance of non-availability of the employee for duty in the past as a result of ill health or otherwise and redundancy", the order said on Tuesday.

The departmental heads in the headquarter as well as regional directors are required to assess each employee "on the above mentioned factors and identify the cases where option of compulsory LWP can be exercised", stated the order dated July 14.

"Names of such employees need to be forwarded to the General Manager (Personnel) in headquarter for obtaining necessary approval of CMD," the order added.

In response to queries regarding this matter, Air India spokesperson said,"We would not like to make any comment on the issue."

Aviation sector has been significantly impacted due to the travel restrictions imposed in India and other countries due to the coronavirus pandemic. All airlines in India have taken cost-cutting measures such as pay cuts, LWP and firings of employees in order to conserve cash flow.

For example, GoAir has put most of its employees on compulsory LWP since April.

India resumed domestic passenger flights from May 25 after a gap of two months due to the coronavirus pandemic.

However, the airlines have been allowed to operate only a maximum of 45 per cent of their pre-COVID domestic flights. Occupancy rate in Indian domestic flights has been around 50-60 per cent since May 25.

Scheduled international passenger flights continue to remain suspended in India since March 23.

The passenger demand for air travel will contract by 49 per cent in 2020 for Indian carriers in comparison to 2019 due to COVID-19 crisis, said global airlines body IATA on Monday.