New NASA Telescope Will Provide X-Ray Views of the Universe


A brand-new house telescope will quickly reveal a hidden imaginative and prescient of the cosmos, probably remodeling our understanding of black holes, supernovas and even the nature of the universe itself.

No, not that one.

Much consideration is being devoted this month to the James Webb Space Telescope, from NASA and the European Space Agency, which is ready to launch on Dec. 22. But a extra unique cadre of astronomers watched excitedly on Thursday throughout the journey to house of a smaller, but in addition transformative, observatory.

NASA launched the Imaging X-ray Polarimetry Explorer, or IXPE mission, on a SpaceX Falcon 9 rocket from Kennedy Space Center in Florida at 1 a.m. Eastern. The spacecraft price a mere $188 million, in contrast with the James Webb’s mammoth funds of $9.7 billion, and is anticipated to show a brand new type of astronomy. It will, for the first time, carry out imaging X-ray polarimetry in orbit, a method that might supply astronomers insights that no different telescope can match.

“It’s giving us information about some of the most bizarre and exciting objects in space,” mentioned Thomas Zurbuchen, the affiliate administrator of NASA’s science mission directorate.

IXPE (pronounced by the mission staff as “ix-pee”) was positioned into an orbit 340 miles above Earth after its launch. The telescope will spend a number of weeks there deploying its scientific devices and testing its tools, then start its two-year mission.

X-rays are a helpful solution to observe the universe. Emitted from extraordinarily energetic objects, they permit astronomers to probe occasions — superheated jets close to black holes or explosions of stars, for instance — in a means different wavelengths, corresponding to seen mild, can’t. But X-rays may be studied solely from house as a result of they’re principally absorbed by Earth’s environment.

A range of devoted X-ray house telescopes and devices have launched to orbit, most notably NASA’s Chandra X-ray and ESA’s XMM-Newton observatories, which each launched in 1999. With spacecraft like these, scientists have unveiled the birthplaces of stars inside gaseous nebulas and mapped the unfold of darkish matter in clusters of galaxies, amongst different pioneering work.

The use of imaging X-ray polarimetry sets IXPE apart from its predecessors. If you’ve ever worn a pair of polarized sun shades, you could know that they use skinny slits to dam horizontal mild, however that turning them sideways blocks vertical mild as an alternative. The similar precept is employed in X-ray polarimetry. The technique will enable astronomers to watch the course of the wavelike motion of the X-ray particles as they arrive, revealing the orientation of incoming electrical and magnetic fields. Armed with this information, astronomers can glean extra info from the X-rays emitted by astrophysical phenomena.

Instead of merely observing the X-rays with a single instrument, the spacecraft is definitely three separate telescopes, every comprising 24 concentric mirrors, at the finish of a 13-foot-long growth, which can lengthen throughout the telescope’s first week in house.

As the X-rays arrive, they are going to be focused by each telescope onto three detectors at the finish of the growth. The detectors every comprise a 10-millimeter layer of helium and a gasoline known as dimethyl ether, or DME. This will reveal the polarization of the X-rays, which can make tracks in the gasoline as they hit.

“These detectors will provide an image of the polarization,” mentioned Elisabetta Cavazzuti, a program supervisor from the Italian Space Agency, which designed the detectors.

There have been a number of makes an attempt at conducting X-ray polarimetry in house earlier than, Martin Weisskopf, the mission’s principal investigator at NASA’s Marshall Space Flight Center, mentioned. In 1971, Dr. Weisskopf was concerned in a profitable experimental mission that carried out temporary X-ray polarization observations of the Crab nebula in our galaxy utilizing a sounding rocket, which works straight up and down however doesn’t go into orbit. A later try and launch a extra superior polarimeter on the Soviet Spectrum-X spacecraft in the 1990s was interrupted by the collapse of the Soviet Union, in accordance with Dr. Weisskopf.

“We’ve been waiting a long time to have a polarimetry mission,” he mentioned.

His and different researchers’ endurance paid off in 2017, when NASA selected IXPE as half of its Small Explorers program.

In the two years after it launches, the IXPE spacecraft will observe greater than 100 cosmic targets, together with black holes, supernovas and unique stars.

One aim of the telescope is to watch the spin of comparatively small black holes, these round 10 instances the mass of our solar. X-ray polarimetry will be capable of probe relativistic results that happen very shut to those black holes, the place the polarization angle of X-ray photons which have escaped is anticipated to be altered as they journey via the closely warped space-time attributable to the black gap’s spin.

“For the first time we can try and measure those distortions,” mentioned Adam Ingram, an astrophysics lecturer at Newcastle University in England.

IXPE may even probe neutron stars, the remnant cores left behind after large stars collapse. Scientists are significantly eager about pulsars, that are quickly rotating neutron stars, and magnetars, that are extremely magnetized ones.

By zeroing in on magnetars, researchers hope to see how ironclad the legal guidelines of physics are. IXPE will be capable of examine an impact close to these stars known as quantum electrodynamics, or QED, the place the extraordinarily sturdy magnetic fields ought to trigger a excessive stage of polarization in the emitted X-ray particles.

“QED is the base of our understanding of physics,” Ilaria Caiazzo, a researcher from the California Institute of Technology, mentioned. “If we found that it’s not right, that would really revolutionize everything. I expect we will confirm this effect.”

Elsewhere, IXPE might inform us extra about the moments after a star’s explosion, a supernova. The spacecraft’s information will reveal how ejected materials from a supernova interacts with the surrounding interstellar medium because it plows into it at excessive speeds, making a shock entrance. Electrons can then go backwards and forwards throughout the shock entrance, a course of referred to as diffusive shock acceleration.

“It’s a very important process in astronomy, but we don’t fully understand the details,” Dr. Ingram mentioned. “It’s thought to be behind why supernova remnants are bright.”

IXPE’s major mission is anticipated to final two years. But if NASA extends the mission, the spacecraft might final practically 20 years, Dr. Weisskopf mentioned. With extra time, astronomers might research different targets, corresponding to Sagittarius A*, the supermassive black gap at the middle of our galaxy. By searching for the reflections of X-rays on clouds of gasoline close to the black gap, they may search for proof of elevated exercise from Sagittarius A* in the previous few centuries.

“The clouds wouldn’t be as bright as they seem unless the black hole was more bright several hundred years ago,” Dr. Weisskopf mentioned. “You can calculate how long it takes for the X-rays to come to the cloud and bounce toward us. It’s a very tough experiment.”

When in contrast with super-telescopes like the James Webb, IXPE could also be comparatively modest. But it highlights the breadth of astronomy that scientists are actually enterprise and the novel methods through which superior machines are getting used to discover our universe.

X-ray polarimetry, as soon as a closed window on the cosmos, is being opened — and with it, a number of hidden secrets and techniques can be unlocked.

“It’s truly a new way of looking at the sky,” Dr. Zurbuchen mentioned.



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