News
A Black Hole has Destroyed a Star, and Used the Wreckage to Pummel Another Star

When a supermassive black gap consumes a star, it doesn’t simply swallow it entire. It shreds the star, ripping it aside little by little earlier than consuming the stays. It’s a messy course of referred to as a tidal disruption occasion (TDE). Astronomers sometimes catch a glimpse of TDEs, and one latest one has helped clear up a thriller a few sort of transient X-ray supply.
Often known as quasi-periodic eruptions (QPEs), they’re delicate X-rays that emanate from the facilities of galaxies each few hours or a number of weeks. QPEs are uncommon, so they’re troublesome to review, and we aren’t positive what causes them. One concept is that they’re attributable to a big star or stellar black gap orbiting the supermassive black gap in such a method that its orbit intersects with the accretion disk of the supermassive black gap. Every time the smaller object passes by means of the disk, it triggers superheated plasma to launch X-rays. We’ve seen a similar effect with blazars, for example.
Given the brief periodicity of QPEs the companion object would wish to orbit the black gap very carefully, simply on the sting of a secure orbit distance. And when it begins intersecting with accretion disk materials, its orbit will decay on a brief cosmic timescale. This is able to clarify why QPEs are so uncommon. However to show this mannequin, astronomers would wish to look at this taking place in actual time, which is what a workforce of astronomers has not too long ago completed. The outcomes will likely be printed in Nature later this month.

The story begins with an remark by the Zwicky Transient Facility again in 2019. The ZTF captured an optical flare that had all of the markings of a tidal disruption occasion. It got here to be referred to as TDE AT2019qiz. In keeping with black gap fashions, when a star is ripped aside, a lot of the fabric kinds an accretion disk across the black gap inside a number of years. This is able to make for excellent QPE circumstances if there was an in depth companion object. So the workforce aimed the Chandra X-ray Observatory at AT2019qiz sometimes, hoping to seize a quasi-periodic eruption. Positive sufficient, in 2023, the workforce began to look at X-ray flashes erupting about each 48 hours. Observations from the Swift and AstroSAT telescopes additional confirmed the end result.
It isn’t recognized whether or not the companion is a star or small black gap, and the workforce want to seize extra QPEs occurring after recognized tidal disruption occasions, however this preliminary result’s fairly clear.
Reference: Nicholl, M., et al. “Quasi-periodic X-ray eruptions years after a nearby tidal disruption event.” arXiv preprint arXiv:2409.02181 (2024).
News
Afghanistan Medal of Honor recipient Dakota Meyer reenlists in Marine Corps Rserves after 15 years

Dakota Meyer, a Marine who was awarded the Medal of Honor for heroism within the Afghanistan Conflict however later grew to become a pointy critic of the Biden administration over its chaotic withdrawal from that battle, is reenlisting within the navy and can serve within the Marine Reserves.
In a briefing with reporters on Thursday earlier than his reenlistment ceremony, 36-year-old Meyer mentioned he’s returning to navy service after 15 years out of uniform as a result of he felt he “had extra to present.” He is additionally near President Trump’s protection secretary, Pete Hegseth.
However Meyer mentioned he would chorus from politics whereas in uniform.
“The good half about being within the reserves is I am nonetheless a citizen once I’m not on orders,” he mentioned. “Once I’m on orders I am going to comply clearly with no matter the usual is.”
In short remarks throughout the ceremony, Hegseth mentioned Meyer’s reenlistment is “not frequent apply” and the Marine Corps “does not do issues like this calmly,” however praised Meyer’s “unusual valor.” Hegseth mentioned the reenlistment reveals “you are by no means too outdated, you are by no means too skilled, you’ve got by no means finished an excessive amount of that you would be able to’t proceed to contribute.”
Initially from Kentucky, Meyer was awarded the Medal of Honor, the navy’s highest honor, by then-President Barack Obama in 2011 for his heroics in Afghanistan when he charged 5 instances in a Humvee into heavy gunfire to rescue comrades underneath assault by Taliban insurgents.
Charles Dharapak / AP
On Sept. 8, 2009, Meyer was a part of a safety group supporting a patrol transferring right into a village within the Ganjgal Valley. Instantly, the lights in a close-by village went out and gunfire erupted. About 50 Taliban insurgents on mountainsides and within the village had ambushed the patrol.
His actions throughout the six-hour assault and firefight saved the lives of 36 individuals, each Individuals and Afghans. He killed a minimum of eight Taliban insurgents. Firing from a gun turret on high of a Humvee pushed by a fellow Marine, he offered cowl for his group, permitting many to flee possible demise.
Meyer described the events in a 2011 interview with CBS Information’ “60 Minutes,” telling correspondent David Martin, “I did not suppose I used to be going to die. I knew I used to be.”
4 American troopers died within the ambush: 1st Lt. Michael Johnson, 25, from Virginia Seaside, Virginia; Employees Sgt. Aaron Kenefick, 30, of Roswell, Georgia; Corpsman James Layton, 22, of Riverbank, California; and Edwin Wayne Johnson Jr., a 31-year-old gunnery sergeant from Columbus, Georgia. A fifth man, Military Sgt. Kenneth W. Westbrook, 41, of Shiprock, New Mexico, died later from his wounds.
After leaving the navy, Meyer remained within the highlight. In 2016 he married former vice presidential candidate Sarah Palin’s daughter, Bristol, and so they had two kids. Years later, in 2019, he instructed “60 Minutes” about his expertise with a new post-traumatic stress disorder treatment.
He is been outspoken concerning the jailing of one other Marine — Lt. Col. Stuart Scheller — who criticized the Biden administration for the 2021 withdrawal from Afghanistan in social media posts whereas in uniform, which is a violation of navy conduct.

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News
Pasadena police shoot, kill dog while responding to call, report says

Pasadena police reportedly shot and killed a canine whereas responding to an incident involving a girl Tuesday evening.
At about 9 p.m., the town Police Division responded to a report of a girl mendacity on the bottom with an unleashed canine close to South Hudson Avenue and East California Boulevard, according to CBS News.
The outlet reported that police stated the girl was making “incoherent statements” and that the canine charged at one of many officers earlier than animal management officers or the hearth division might get to the scene.
The officers shot and killed the canine, in keeping with CBS Information. The lady was hospitalized for analysis and no different accidents have been reported.
The Pasadena Police Division didn’t reply to requests for remark from The Occasions on Thursday.

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News
LVMH’s Chief Counted Trump as a Friend. He Still Faces Tariffs.
The commerce struggle has harm the Louis Vuitton Moët Hennessy luxurious empire. Bernard Arnault, head of the corporate, mentioned a failure to strike a take care of President Trump could be “the fault of Brussels.”

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