Bahcall’s scientific legacy is visible across the field of astrophysics. https://lnkd.in/gRJmbGFN
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Project Scientist Universidad Politécnica de Madrid, PhD and Msc in Physics. R&D Program Manager. Quantum Technologies.
Interestingly, this information would seem to be in good agreement also with the theoretical analysis that José Luis Sánchez Gómez and myself did many, many years ago, on the anomaly detected in the Pioneer probes during the 1980s and 1990s and the measurement of local distances within a globally expanding cosmological space. A cosmological Foucault effect in front of us! https://lnkd.in/d-Mde_p9
A new study reports conclusive evidence for the breakdown of standard gravity in the low acceleration limit from a verifiable analysis of the orbital motions of long-period, widely separated, binary stars, usually referred to as wide binaries in astronomy and astrophysics.
Smoking-gun evidence for modified gravity at low acceleration from Gaia observations of wide binary stars
phys.org
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Dan Goldin is spot on. Bold thinking in Astrophysics observatory architectures, and utilization of the latest commercial space practices need to be examined further! https://lnkd.in/gYu_ZJsY
Bolder than Webb? ‘You’ll never know unless you go!’
aerospaceamerica.aiaa.org
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#Astrophysics | 𝗥𝗮𝗿𝗲 𝗚𝗮𝗺𝗺𝗮-𝗿𝗮𝘆 𝗕𝘂𝗿𝘀𝘁 𝗗𝗲𝘁𝗲𝗰𝘁𝗲𝗱 𝗶𝗻 𝗡𝗲𝗮𝗿𝗯𝘆 𝗚𝗮𝗹𝗮𝘅𝘆 | Scientists from the University of Geneva and the National Institute for Astrophysics in Milan (INAF - Istituto Nazionale di Astrofisica), led by Dr. Sandro Mereghetti detected a gamma-ray burst from a nearby galaxy named "M82", an event typically observed in far-off parts of the sky. Using the Integral Burst Alert System (IBAS) and data from the European Space Agency - ESA’s XMM-Newton space telescope, the researchers were able to study this rare occurrence in greater detail. This essential discovery advances our understanding of gamma-ray bursts and their origins, broadening the horizons of astrophysics and our comprehension of the universe. 👉 Learn more >> https://lnkd.in/gfkPiZpT 👉 Original publication >> https://lnkd.in/g9DubN_J 🇨🇭 Follow #ScienceSwitzerland for the latest news and emerging trends on Swiss science, technology, education and innovation >> swissinnovation.org Follow us >> Science-Switzerland #Science | #Education | #Research | #Innovation
Eruption of mega-magnetic star lights up nearby galaxy
unige.ch
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Astrophysics Instruments - https://lnkd.in/eQjupNHn in Space – February 2024 Instruments on the exterior of the International Space Station provide data on astrophysical phenomena that are helping scientists better understand our universe and its origins. Crew members install and maintain these instruments robotically and scientific teams operate them remotely. One of the instruments, the Neutron star Interior Composition Explorer (NICER), measures X-rays emitted by neutron stars and other cosmic objects to help answer questions about matter and gravity. Neutron stars, the densest measurable objects in the universe, are the remains of massive stars that exploded into supernovae. Some are called pulsars because they spin, sweeping bright X-ray beams across the sky like lighthouse beacons. NICER is located on the space station because the X-rays emitted by neutron stars do not penetrate Earth’s atmosphere. A view of NICER on the exterior of the International Space Station. NASA In May 2023, NICER developed a “light leak,” with unwanted sunlight entering the instrument. As a result, the team limits daytime observations to objects far from the Sun’s position in the sky and lowers NICER’s sensitivity during the orbital day. Nighttime observations are not affected. Even with these limitations, NICER’s recent observations continue to generate results and papers, many published in top-tier journals. Neutron Star Cores Scientists suspect that neutron stars grow denser toward their cores, but the form of matter in their centers remains unknown. NICER’s precise measurements of the size and mass of these stars are providing more insight. In 2021, two teams used different approaches to model the size of PSR J0740 6620, the heaviest known pulsar at 2.1 times the Sun’s mass, and produced measurements that are essentially in agreement.1,2 This star is almost 50% more massive than a previous pulsar measured by NICER, J0030 0451, but is essentially the same diameter.3,4 Scientists are investigating how this finding might change popular models of neutron star core composition. X-ray Binaries NICER has advanced understanding of X-ray binaries, systems where superdense objects such as neutron stars are paired with normal stars. X-ray binaries produce gravitational waves, invisible ripples in space-time also produced by exploding stars and merging black holes. Data from gravitational wave signals are being used to map the galaxy’s binaries. Joint observations by NICER and NASA’s Nuclear Spectroscopic Telescope Array (NuSTAR) revealed specific properties of an X-Ray binary, 4U 0614 091, that increase understanding of these phenomena.5 A joint NICER and NuSTAR observation of an ultra-compact X-ray binary (UCXB), 4U 1543-624, is helping scientists fine tune models of gravitational waves from these sources.6 The behavior of UCXBs suggests that the superdense object of the pair takes material from its companion ...
Astrophysics Instruments
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Astrophysics Instruments - https://lnkd.in/eQjupNHn in Space February 2024 Instruments on the exterior of the International Space Station provide data on astrophysical phenomena that are helping scientists better understand our universe and its origins. Crew members install and maintain these instruments robotically and scientific teams operate them remotely. One of the instruments, the Neutron star Interior Composition Explorer (NICER), measures X-rays emitted by neutron stars and other cosmic objects to help answer questions about matter and gravity. Neutron stars, the densest measurable objects in the universe, are the remains of massive stars that exploded into supernovae. Some are called pulsars because they spin, sweeping bright X-ray beams across the sky like lighthouse beacons. NICER is located on the space station because the X-rays emitted by neutron stars do not penetrate Earth’s atmosphere. A view of NICER on the exterior of the International Space Station. NASA In May 2023, NICER developed a “light leak,” with unwanted sunlight entering the instrument. As a result, the team limits daytime observations to objects far from the Sun’s position in the sky and lowers NICER’s sensitivity during the orbital day. Nighttime observations are not affected. Even with these limitations, NICER’s recent observations continue to generate results and papers, many published in top-tier journals. Neutron Star Cores Scientists suspect that neutron stars grow denser toward their cores, but the form of matter in their centers remains unknown. NICER’s precise measurements of the size and mass of these stars are providing more insight. In 2021, two teams used different approaches to model the size of PSR J0740 6620, the heaviest known pulsar at 2.1 times the Sun’s mass, and produced measurements that are essentially in agreement.1,2 This star is almost 50% more massive than a previous pulsar measured by NICER, J0030 0451, but is essentially the same diameter.3,4 Scientists are investigating how this finding might change popular models of neutron star core composition. X-ray Binaries NICER has advanced understanding of X-ray binaries, systems where superdense objects such as neutron stars are paired with normal stars. X-ray binaries produce gravitational waves, invisible ripples in space-time also produced by exploding stars and merging black holes. Data from gravitational wave signals are being used to map the galaxy’s binaries. Joint observations by NICER and NASA’s Nuclear Spectroscopic Telescope Array (NuSTAR) revealed specific properties of an X-Ray binary, 4U 0614 091, that increase understanding of these phenomena.5 A joint NICER and NuSTAR observation of an ultra-compact X-ray binary (UCXB), 4U 1543-624, is helping scientists fine tune models of gravitational waves from these sources.6 The behavior of UCXBs suggests that the superdense object of the pair takes material from its companion ...
Astrophysics Instruments
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Astrophysics Instruments - https://lnkd.in/eQjupNHn in Space February 2024 Instruments on the exterior of the International Space Station provide data on astrophysical phenomena that are helping scientists better understand our universe and its origins. Crew members install and maintain these instruments robotically and scientific teams operate them remotely. One of the instruments, the Neutron star Interior Composition Explorer (NICER), measures X-rays emitted by neutron stars and other cosmic objects to help answer questions about matter and gravity. Neutron stars, the densest measurable objects in the universe, are the remains of massive stars that exploded into supernovae. Some are called pulsars because they spin, sweeping bright X-ray beams across the sky like lighthouse beacons. NICER is located on the space station because the X-rays emitted by neutron stars do not penetrate Earth’s atmosphere. A view of NICER on the exterior of the International Space Station. NASA In May 2023, NICER developed a “light leak,” with unwanted sunlight entering the instrument. As a result, the team limits daytime observations to objects far from the Sun’s position in the sky and lowers NICER’s sensitivity during the orbital day. Nighttime observations are not affected. Even with these limitations, NICER’s recent observations continue to generate results and papers, many published in top-tier journals. Neutron Star Cores Scientists suspect that neutron stars grow denser toward their cores, but the form of matter in their centers remains unknown. NICER’s precise measurements of the size and mass of these stars are providing more insight. In 2021, two teams used different approaches to model the size of PSR J0740 6620, the heaviest known pulsar at 2.1 times the Sun’s mass, and produced measurements that are essentially in agreement.1,2 This star is almost 50% more massive than a previous pulsar measured by NICER, J0030 0451, but is essentially the same diameter.3,4 Scientists are investigating how this finding might change popular models of neutron star core composition. X-ray Binaries NICER has advanced understanding of X-ray binaries, systems where superdense objects such as neutron stars are paired with normal stars. X-ray binaries produce gravitational waves, invisible ripples in space-time also produced by exploding stars and merging black holes. Data from gravitational wave signals are being used to map the galaxy’s binaries. Joint observations by NICER and NASA’s Nuclear Spectroscopic Telescope Array (NuSTAR) revealed specific properties of an X-Ray binary, 4U 0614 091, that increase understanding of these phenomena.5 A joint NICER and NuSTAR observation of an ultra-compact X-ray binary (UCXB), 4U 1543-624, is helping scientists fine tune models of gravitational waves from these sources.6 The behavior of UCXBs suggests that the superdense object of the pair takes material from its companion ...
Astrophysics Instruments
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Astrophysics Instruments - https://lnkd.in/eQjupNHn in Space – February 2024 Instruments on the exterior of the International Space Station provide data on astrophysical phenomena that are helping scientists better understand our universe and its origins. Crew members install and maintain these instruments robotically and scientific teams operate them remotely. One of the instruments, the Neutron star Interior Composition Explorer (NICER), measures X-rays emitted by neutron stars and other cosmic objects to help answer questions about matter and gravity. Neutron stars, the densest measurable objects in the universe, are the remains of massive stars that exploded into supernovae. Some are called pulsars because they spin, sweeping bright X-ray beams across the sky like lighthouse beacons. NICER is located on the space station because the X-rays emitted by neutron stars do not penetrate Earth’s atmosphere. A view of NICER on the exterior of the International Space Station. NASA In May 2023, NICER developed a “light leak,” with unwanted sunlight entering the instrument. As a result, the team limits daytime observations to objects far from the Sun’s position in the sky and lowers NICER’s sensitivity during the orbital day. Nighttime observations are not affected. Even with these limitations, NICER’s recent observations continue to generate results and papers, many published in top-tier journals. Neutron Star Cores Scientists suspect that neutron stars grow denser toward their cores, but the form of matter in their centers remains unknown. NICER’s precise measurements of the size and mass of these stars are providing more insight. In 2021, two teams used different approaches to model the size of PSR J0740 6620, the heaviest known pulsar at 2.1 times the Sun’s mass, and produced measurements that are essentially in agreement.1,2 This star is almost 50% more massive than a previous pulsar measured by NICER, J0030 0451, but is essentially the same diameter.3,4 Scientists are investigating how this finding might change popular models of neutron star core composition. X-ray Binaries NICER has advanced understanding of X-ray binaries, systems where superdense objects such as neutron stars are paired with normal stars. X-ray binaries produce gravitational waves, invisible ripples in space-time also produced by exploding stars and merging black holes. Data from gravitational wave signals are being used to map the galaxy’s binaries. Joint observations by NICER and NASA’s Nuclear Spectroscopic Telescope Array (NuSTAR) revealed specific properties of an X-Ray binary, 4U 0614 091, that increase understanding of these phenomena.5 A joint NICER and NuSTAR observation of an ultra-compact X-ray binary (UCXB), 4U 1543-624, is helping scientists fine tune models of gravitational waves from these sources.6 The behavior of UCXBs suggests that the superdense object of the pair takes material from its companion ...
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“In this photo, I am presenting my poster at the 2024 American Astronomical Society High Energy Astrophysics conference in Austin, Texas. There, I shared my work studying our central supermassive black hole, Sagittarius A*, and the Galactic Center in X-rays with data from the Chandra Space Telescope. My thesis work as a whole attempts to unravel/better study the X-ray emitting structures in the central ~10 pc (32.6 light years), providing insights into the history of our Galactic Center and how Sagittarius A*'s environment affects it and how it affects its environment. This work is only possible with Chandra (#SaveChandra), which has the best combined spectral and spatial resolution in X-rays, and even though it launched in 1999, this resolution will not be surpassed for at least three decades to come.” —Mayura Balakrishnan, Rackham Predoctoral Fellow and Astronomy and Astrophysics Ph.D. student. Learn more about Mayura’s research: myumi.ch/nyVPb What tools are critical to your research? Tell us in the comments or email us at [email protected]. #UMich #GradSchool #WeAreRackham Image description: Mayura Balakrishnan stands near her poster.
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President, OutLaw | Rising 3L with Expertise in Aviation Law | Legal Contracts Intern, Collins Aerospace | Aspiring Aviation Lawyer
Astrophysics Instruments - https://lnkd.in/eRw3ppsg in Space – February 2024 Instruments on the exterior of the International Space Station provide data on astrophysical phenomena that are helping scientists better understand our universe and its origins. Crew members install and maintain these instruments robotically and scientific teams operate them remotely. One of the instruments, the Neutron star Interior Composition Explorer (NICER), measures X-rays emitted by neutron stars and other cosmic objects to help answer questions about matter and gravity. Neutron stars, the densest measurable objects in the universe, are the remains of massive stars that exploded into supernovae. Some are called pulsars because they spin, sweeping bright X-ray beams across the sky like lighthouse beacons. NICER is located on the space station because the X-rays emitted by neutron stars do not penetrate Earth’s atmosphere. A view of NICER on the exterior of the International Space Station. NASA In May 2023, NICER developed a “light leak,” with unwanted sunlight entering the instrument. As a result, the team limits daytime observations to objects far from the Sun’s position in the sky and lowers NICER’s sensitivity during the orbital day. Nighttime observations are not affected. Even with these limitations, NICER’s recent observations continue to generate results and papers, many published in top-tier journals. Neutron Star Cores Scientists suspect that neutron stars grow denser toward their cores, but the form of matter in their centers remains unknown. NICER’s precise measurements of the size and mass of these stars are providing more insight. In 2021, two teams used different approaches to model the size of PSR J0740 6620, the heaviest known pulsar at 2.1 times the Sun’s mass, and produced measurements that are essentially in agreement.1,2 This star is almost 50% more massive than a previous pulsar measured by NICER, J0030 0451, but is essentially the same diameter.3,4 Scientists are investigating how this finding might change popular models of neutron star core composition. X-ray Binaries NICER has advanced understanding of X-ray binaries, systems where superdense objects such as neutron stars are paired with normal stars. X-ray binaries produce gravitational waves, invisible ripples in space-time also produced by exploding stars and merging black holes. Data from gravitational wave signals are being used to map the galaxy’s binaries. Joint observations by NICER and NASA’s Nuclear Spectroscopic Telescope Array (NuSTAR) revealed specific properties of an X-Ray binary, 4U 0614 091, that increase understanding of these phenomena.5 A joint NICER and NuSTAR observation of an ultra-compact X-ray binary (UCXB), 4U 1543-624, is helping scientists fine tune models of gravitational waves from these sources.6 The behavior of UCXBs suggests that the superdense object of the pair takes material from its companion ...
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