Astronomers identify nearly 80 exoplanets in record time
Washington, June 23 : Scientists have discovered nearly 80 new planetary candidates, amid some 50,000 stars, in a record two weeks after the data from the K2 mission's -- the follow-up mission to NASA's Kepler Space Telescope -- was available.
The discovery was based on the analysis of data from K2's 16th and 17th observing campaigns, known as C16 and C17.
It typically takes several months to a year for scientists to analyse graphs of light intensity called "lightcurves" from the tens of thousands of stars to find exoplanet candidates.
Using existing tools, the researchers at Massachusetts Institute of Technology (MIT) identified the planetary candidates in just two weeks.
The rapid search through "lightcurves" from each of the 50,000 stars showed 30 "highest-quality" planet candidates whose periodic signatures are especially likely to be caused by transiting planets, 48 more ambiguous events that may be either planets or false positives, 164 eclipsing binaries, and 231 other regularly periodic variable sources, the team reported in the paper published in The Astronomical Journal.
Such a fast planet-search enables astronomers to follow up with ground-based telescopes much sooner than they otherwise would, giving them a chance to catch a glimpse of planetary candidates before the Earth passes by that particular patch of sky on its way around the sun, said Ian Crossfield, Assistant Professor at MIT.
Such speed will also be a necessity when scientists start receiving data from NASA's Transiting Exoplanet Survey Satellite (TESS) which is designed to monitor nearby stars in 30-day swaths and will ultimately cover nearly the entire sky.
Further, the scientists also reported the discovery of a likely planet that orbits the star HD 73344 which would be the brightest planet host ever discovered by the K2 mission.
The brightness of this star, combined with the speed with which its planetary candidate was identified, can help astronomers quickly zero in on even more specific features of this system, Crossfield said.
"We found one of the most exciting planets that K2 has found in its entire mission, and we did it more rapidly than any effort has done before," he added.
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Delhi: Father, son held for killing 19-year-old woman in suspected honour killing
New Delhi (PTI): The Delhi Police has arrested a man and his son for allegedly murdering his 19-year-old daughter in west Delhi's Hari Nagar area, an official said on Friday.
The case first came to light on April 1 after a PCR call was received around 2 pm, alleging that a woman had been killed by her family members and her body was being taken for last rites, he said.
The accused, identified as Mohammad Maneer (55), a vegetable vendor, and his son Meraj Ali (19), were arrested in connection with the case, the officer said.
The victim had been in a relationship with a man from her native place for the past two years, which was opposed by her father, Maneer and brother Meraj, he said.
"When the girl did not end the relationship despite objections, the family killed her," the officer said.
On April 1, the police said that when their team reached the spot, they found that the woman's body was being taken for burial.
Acting on the input, the burial process was stopped over suspicion of honour killing.
"Police intercepted the family members and took possession of the body," he said.
Police said that the man who had made the PCR told them that the woman was in love with his cousin.
During the inquiry, police also interacted with the PCR caller, who said his cousin, a friend of the deceased, had informed him about the situation and suspected foul play, prompting him to alert the police control room.
The body of the woman was subsequently shifted to the mortuary of Deen Dayal Upadhyay Hospital for preservation and postmortem.
Police said that both the crime team and the forensic science laboratory (FSL) team were called to inspect the scene and collect evidence.
Police said that, as per the postmortem report, the cause of death was identified as smothering, indicating that the woman was suffocated.
A preliminary inquiry also revealed that the family had initiated preparations for the last rites soon after the woman's death, raising suspicion about the circumstances.
Initial investigation pointed to the family's opposition to the woman's relationship.
"The family members of the woman saw her with the man, and she was taken back home. We got to know that she was beaten up and even locked inside the house for some days," a source said.
Further investigation into the matter is underway, police added.
