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Scientists develop new, faster method for seeking out dark matter

Credit: Steven Burrows
For nearly a century, scientists have worked to unravel the mystery of dark matter an elusive substance that spreads through the universe and likely makes up much of its mass, but has so far proven impossible to detect in experiments. Now, a team of researchers have used an innovative technique called quantum squeezing to dramatically speed up the search for one candidate for dark matter in the lab.
The findings, published today in the journal
Nature, center on an incredibly lightweight and as-of-yet undiscovered particle called the axion. According to theory, axions are likely billions to trillions of times smaller than electrons and may have been created during the Big Bang in humungous numbers enough to potentially explain the existence of dark matter. ....

United States , Kelly Backes , Konrad Lehnert , Daniel Palken , Yale University , University Of California , National Institute Of Standards , University Of Colorado Boulder , Department Of Physics , Big Bang , Colorado Boulder , National Institute , Heisenberg Uncertainty Principle , Chemistry Physics Materials Sciences , Atomic Molecular Particle Physics , Space Planetary Science , Particle Physics , ஒன்றுபட்டது மாநிலங்களில் , கெல்லி முதுகில் , கொன்ராட் லேஹ்னேர்த் , யேல் பல்கலைக்கழகம் , பல்கலைக்கழகம் ஆஃப் கலிஃபோர்னியா , தேசிய நிறுவனம் ஆஃப் தரநிலைகள் , பல்கலைக்கழகம் ஆஃப் கொலராடோ கற்பாறை , துறை ஆஃப் இயற்பியல் , பெரியது இடி ,

Astronomers uncover mysterious origins of 'super-Earths'

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IMAGE: This artist s impression shows the planet orbiting the Sun-like star HD 85512 in the southern constellation of Vela (The Sail). This planet is one of 16 super-Earths discovered by the.
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Credit: ESO/M. Kornmesser
Mini-Neptunes and super-Earths up to four times the size of our own are the most common exoplanets orbiting stars beyond our solar system. Until now, super-Earths were thought to be the rocky cores of mini-Neptunes whose gassy atmospheres were blown away. In a new study published in
The Astrophysical Journal, astronomers from McGill University show that some of these exoplanets never had gaseous atmospheres to begin with, shedding new light on their mysterious origins. ....

Nicholas Connors , Department Of Physics At Mcgill University , Mcgill Space Institute , Mcgill University , Astrophysical Journal , Steve Lee , Assistant Professor , Mcgill Space , Radius Gap , Potentially Broad Core Mass Distributions , Space Planetary Science , Planets Moons , நிக்கோலஸ் இணைப்பிகள் , துறை ஆஃப் இயற்பியல் இல் மகில் பல்கலைக்கழகம் , மகில் இடம் நிறுவனம் , மகில் பல்கலைக்கழகம் , வானியற்பியல் இதழ் , ஈவ் லீ , உதவியாளர் ப்ரொஃபெஸர் , மகில் இடம் , ஆரம் இடைவெளி , இடம் கிரகங்கள் அறிவியல் , கிரகங்கள் நிலவுகள் ,

A new method to search for potentially habitable planets

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IMAGE: Alpha Centauri A (left) and Alpha Centauri B imaged by the Hubble Space Telescope. Located in the constellation The Centaur, at a distance of 4.3 light-years, the pair of stars.
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Credit: NASA/ESA/Hubble
Imaging planets orbiting around nearby stars, which could potentially harbour life, has become a possibility thanks to the progress made in observational methods by an international team of astronomers. First candidate: Alpha Centauri, a system similar to ours, only 4.3 light years away. This study is the subject of a publication in the journal
Nature Communications.
Efforts to obtain direct images of exoplanets - planets outside our solar system - have so far been hampered by technological limitations, which have led to a bias towards detecting planets much larger than Jupiter, around very young stars and far from the habitable zone, the area in which a planet may have liquid water on its surface, and thus potentially l ....

Kevin Wagner , Hubble Sagan , Anne Lise Maire , Apha Centauri , Alpha Centauri , Proxima Centauri , Olivier Absil , Nature Communications , Research Institute Faculty Of Sciences , University Of Arizona Steward Observatory , University Of Uppsala , European Research Council , University Of Li , Steward Observatory , Extremely Large Telescope , New Earths , Alpha Centauri Region , Space Planetary Science , Stars The Sun , கெவின் வாக்னர் , ஹப்பிள் சாகன் , அன்னே லைஸ் மேர் , அபா செண்ட Au ரி , ஆல்பா செண்ட Au ரி , இயற்கை தகவல்தொடர்புகள் , ஆராய்ச்சி நிறுவனம் ஆசிரிய ஆஃப் அறிவியல் ,

Spectacular 'honeycomb heart' revealed in iconic stellar explosion

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VIDEO: This 3D reconstruction of the Crab Nebula is made of 406,472 individual points where nebular emission has been detected in SITELLE spectra. The velocity of each element has been translated.
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Credit: Thomas Martin, Danny Milisavljevic and Laurent Drissen
A unique heart-shape , with wisps of gas filaments showing an intricate honeycomb-like arrangement, has been discovered at the centre of the iconic supernova remnant, the Crab Nebula. Astronomers have mapped the void in unprecedented detail, creating a realistic three-dimensional reconstruction. The new work is published in
Monthly Notices of the Royal Astronomical Society.
The Crab, formally known as Messier 1, exploded as a dramatic supernova in 1054 CE, and was observed over the subsequent months and years by ancient astronomers across the world. The resulting nebula - the remnant of this enormous explosion - has been studied by amateur and professional astronomers ....

Mauna Kea , United States , Laurent Drissen , Dan Milisavljevic , Thomas Martin , Purdue University , Monthly Notices Of The Royal Astronomical Society , Monthly Notices , Royal Astronomical , Crab Nebula , Canada Hawaii France Telescope , Space Planetary Science , Stars The Sun , ம Una னா கீ , ஒன்றுபட்டது மாநிலங்களில் , தாமஸ் மார்டின் , பர்‌ட்யூ பல்கலைக்கழகம் , மாதாந்திர அறிவிப்புகள் ஆஃப் தி அரச வானியல் சமூகம் , மாதாந்திர அறிவிப்புகள் , அரச வானியல் , நண்டு நெபுலா , கனடா ஹவாய் பிரான்ஸ் தொலைநோக்கி , இடம் கிரகங்கள் அறிவியல் , நட்சத்திரங்கள் தி சூரியன் ,

Placing cosmological constraints on quantum gravity phenomenology

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A description of gravity compatible with the principles of quantum mechanics has long been a widely pursued goal in physics. Existing theories of this quantum gravity often involve mathematical corrections to Heisenberg s Uncertainty Principle (HUP), which quantifies the inherent limits in the accuracy of any quantum measurement. These corrections arise when gravitational interactions are considered, leading to a Generalized Uncertainty Principle (GUP). Two specific GUP models are often used: the first modifies the HUP with a linear correction, while the second introduces a quadratic one. Through new research published in
EPJ C, Serena Giardino and Vincenzo Salzano at the University of Szczecin in Poland have used well-established cosmological observations to place tighter constraints on the quadratic model, while discrediting the linear model. ....

Serena Giardino , Stephen Hawking , Vincenzo Salzano , University Of Szczecin , Uncertainty Principle , Generalized Uncertainty Principle , Chemistry Physics Materials Sciences , செரீனா ஜியார்டினோ , ஸ்டீபன் ஹாக்கிங் , வின்சென்சோ சல்சானோ , நிச்சயமற்ற தன்மை ப்ரிந்ஸிபல் , வேதியியல் இயற்பியல் பொருட்கள் அறிவியல் ,