News Radar Dashboard https://news.nebulacast.app/ Aggregated dashboard feed Tue, 21 Jul 2026 06:09:41 GMT Cosmological simulations of the high-redshift galaxy population adopting a variable stellar initial mass function https://arxiv.org/abs/2607.16404 https://arxiv.org/abs/2607.16404 Tue, 21 Jul 2026 04:00:00 GMT SCIENCE arXiv:2607.16404v1 Announce Type: new Abstract: JWST surveys reveal a greater space density of high-redshift UV-bright galaxies than predicted by conventional galaxy formation models. We present results from a $L=100$... more »]]> The Polana-Eulalia Complex with JWST NIRSpec: Connections to Bennu, Ryugu, and Outer Solar System Bodies https://arxiv.org/abs/2607.16518 https://arxiv.org/abs/2607.16518 Tue, 21 Jul 2026 04:00:00 GMT SCIENCE arXiv:2607.16518v1 Announce Type: new Abstract: Carbon rich [C complex] asteroids provide insight into the early Solar System, and families of C complex asteroids serve as robust samples for learning about the internal... more »]]> Superorbital variability in the quiescent black hole X-ray transient A0620-00 https://arxiv.org/abs/2607.16397 https://arxiv.org/abs/2607.16397 Tue, 21 Jul 2026 04:00:00 GMT SCIENCE arXiv:2607.16397v1 Announce Type: new Abstract: Quiescent black hole low-mass X-ray binaries provide a key setting for probing accretion physics at low luminosities. A0620-00, the archetypal system in this class, has... more »]]> Origin of the Sloshing Spiral in the Abell 2107 Galaxy Cluster https://arxiv.org/abs/2607.16496 https://arxiv.org/abs/2607.16496 Tue, 21 Jul 2026 04:00:00 GMT SCIENCE arXiv:2607.16496v1 Announce Type: new Abstract: We present a detailed thermodynamic analysis of a sloshing spiral discovered in the intracluster medium (ICM) of the galaxy cluster Abell 2107, based on deep Chandra X-ray... more »]]> Fermi-LAT Detection of a Gamma-ray Excess toward the Radio-quiet Narrow-line Seyfert 1 Galaxy 1H 1934-063 https://arxiv.org/abs/2607.16748 https://arxiv.org/abs/2607.16748 Tue, 21 Jul 2026 04:00:00 GMT SCIENCE arXiv:2607.16748v1 Announce Type: new Abstract: We report a $\gamma$-ray excess toward the radio-quiet narrow-line Seyfert 1 galaxy 1H 1934-063 using data collected by the Large Area Telescope (LAT) on board the Fermi... more »]]> Electromagnetic Emission from a Black Hole Evaporating in External Magnetic Field https://arxiv.org/abs/2607.16880 https://arxiv.org/abs/2607.16880 Tue, 21 Jul 2026 04:00:00 GMT SCIENCE arXiv:2607.16880v1 Announce Type: new Abstract: We describe a classical (non-quantum) radiation process: additional (to Hawking) emission by a black hole evaporating in an external magnetic field in vacuum. The... more »]]> Determination of [Fe/H] in Fundamental mode Classical Cepheids from Gaia DR3 light curve Fourier parameters https://arxiv.org/abs/2607.16775 https://arxiv.org/abs/2607.16775 Tue, 21 Jul 2026 04:00:00 GMT SCIENCE arXiv:2607.16775v1 Announce Type: new Abstract: Estimating the iron abundance ([Fe/H]) of Classical Cepheids (CCs) is crucial both for validating the cosmic distance scale through the Period-Luminosity relation and for... more »]]> Astronomers Determine that Exoplanets Around Barnard's Star are Extremely Uninhabitable https://www.universetoday.com/articles/astronomers-determine-that-exoplanets-around-barnards-star-are-extremely-uninhabitable https://www.universetoday.com/articles/astronomers-determine-that-exoplanets-around-barnards-star-are-extremely-uninhabitable Mon, 20 Jul 2026 22:49:54 GMT NEWS thumb

Scientists have painted the most detailed portrait yet of the planetary system orbiting Barnard’s Star. Unfortunately, the picture is not encouraging, as all four planets appear to be "extremely uninhabitable." more »
]]> A Star Orbiting Our Galaxy's Supermassive Black Hole Tests the Limits of Relativity https://www.universetoday.com/articles/a-star-orbiting-our-galaxys-supermassive-black-hole-tests-the-limits-of-relativity https://www.universetoday.com/articles/a-star-orbiting-our-galaxys-supermassive-black-hole-tests-the-limits-of-relativity Mon, 20 Jul 2026 17:53:51 GMT NEWS thumb

A Sun-like star orbits the supermassive black hole in our Milky Way so closely that it comes within the distance of Neptune's orbit of the Sun. It has a top speed of more than 8% of light speed. With such extreme motion... more »
]]> [JWST]: атмосферы-то у экзопланет мы найдем... из чего они состоят - вот вопрос http://www.nebulacast.com/2026/07/jwst.html http://www.nebulacast.com/2026/07/jwst.html Mon, 20 Jul 2026 06:30:00 GMT NEBULACAST thumb

Поиск жизни за пределами Солнечной системы обычно сосредоточен на планетах земного типа с атмосферой, похожей на земную. Однако существует и другой класс потенциально интересных миров — планеты с плотной... more »
]]> An update on the world’s biggest eye on the sky https://www.eso.org/public/videos/potw2629a/ https://www.eso.org/public/videos/potw2629a/ Mon, 20 Jul 2026 04:00:00 GMT VIDEOS thumb

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]]> ELT footage compilation 2025-2026 https://www.eso.org/public/videos/ELT-Timelapses-2025-2026-2-cc3/ https://www.eso.org/public/videos/ELT-Timelapses-2025-2026-2-cc3/ Mon, 20 Jul 2026 04:00:00 GMT VIDEOS thumb

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]]> What's happening in the https://apod.nasa.gov/apod/ap260720.html https://apod.nasa.gov/apod/ap260720.html Mon, 20 Jul 2026 00:00:00 GMT IMAGES thumb

What's happening in the more »
]]> A Fully Photometric Approach to Type Ia Supernova Cosmology in the LSST Era: Host-galaxy Redshifts and Supernova Classification https://iopscience.iop.org/article/10.3847/1538-4357/ae7a41 https://iopscience.iop.org/article/10.3847/1538-4357/ae7a41 Sun, 19 Jul 2026 23:00:00 GMT SCIENCE The upcoming Vera C. Rubin Observatory’s Legacy Survey of Space and Time (LSST) is expected to discover nearly one million Type Ia supernovae (SNe Ia), offering an unprecedented opportunity to constrain dark energy. The... more »]]> Dust in the Very Metal-poor Galaxy Sextans A with JWST. I. Characterizing the Evolved Stellar Population of Sextans A Based on JWST Observations and Stellar Evolution Models https://iopscience.iop.org/article/10.3847/1538-4357/ae7bee https://iopscience.iop.org/article/10.3847/1538-4357/ae7bee Sun, 19 Jul 2026 23:00:00 GMT SCIENCE The nearby star-forming dwarf galaxy Sextans A offers a unique window into galaxy evolution in the early Universe, owing to its extremely low metallicity (∼0.01–0.07 Z⊙). Recent JWST imaging of Sextans A spanning 1–21... more »]]> GEMS JWST: A Subsolar Metallicity Atmosphere for Giant Planet TOI-5293 A b Orbiting a Rapidly Changing M Dwarf https://iopscience.iop.org/article/10.3847/1538-4357/ae801f https://iopscience.iop.org/article/10.3847/1538-4357/ae801f Sun, 19 Jul 2026 23:00:00 GMT SCIENCE The growing sample of giant exoplanets around M dwarf stars (GEMS) helps probe the extremes of giant planet formation. Comparing the properties of this sample with their FGK counterparts can help us understand how... more »]]> IY Lyr: A Thick-disk First-overtone RR Lyrae Star with a Possible Neutron Star Companion https://iopscience.iop.org/article/10.3847/1538-4357/ae8520 https://iopscience.iop.org/article/10.3847/1538-4357/ae8520 Sun, 19 Jul 2026 23:00:00 GMT SCIENCE IY Lyr, historically misclassified as an eclipsing binary, has been previously identified as a first-overtone RR Lyrae star (RRc star). Using multiband photometry (All-Sky Automated Survey for Supernovae, Zwicky... more »]]> Toward Instrument-agnostic Exoplanet Candidate Prioritization https://iopscience.iop.org/article/10.3847/1538-3881/ae7d0f https://iopscience.iop.org/article/10.3847/1538-3881/ae7d0f Sun, 19 Jul 2026 23:00:00 GMT SCIENCE We have developed a novel machine learning (ML) approach for predicting the likelihood of exoplanet candidate confirmation equally capable of performance on both Transiting Exoplanet Survey Satellite (TESS) and Kepler... more »]]> Revisiting the Radial Velocities of Nearby Open Clusters Using Gaia DR3 https://iopscience.iop.org/article/10.1088/1538-3873/ae8479 https://iopscience.iop.org/article/10.1088/1538-3873/ae8479 Sun, 19 Jul 2026 23:00:00 GMT SCIENCE Open clusters (OCs) are essential laboratories for probing stellar dynamics and tracing the structure and evolution of the Milky Way. Accurate measurements of their average radial velocities (RVs) and RV dispersions are... more »]]> Kes 75 with IXPE: Detection of Nebular X-Ray Polarization and Change in Pulsar Lightcurve https://iopscience.iop.org/article/10.3847/1538-4357/ae7f12 https://iopscience.iop.org/article/10.3847/1538-4357/ae7f12 Sun, 19 Jul 2026 23:00:00 GMT SCIENCE We present the first X-ray polarization measurements of the PSR/PWN complex within SNR Kes 75. Two ∼500 ks IXPE observations were conducted in 2024 October/November and 2025 April. The second observation yields a... more »]]> ALMA High-J CO Spectroscopy of High-redshift Galaxies. II. 0 . ... https://iopscience.iop.org/article/10.3847/1538-4357/ae80b8 https://iopscience.iop.org/article/10.3847/1538-4357/ae80b8 Sun, 19 Jul 2026 23:00:00 GMT SCIENCE We present ultrahigh-resolution ( pc) Atacama Large Millimeter/submillimeter Array (ALMA) observations of the hyperluminous dust-obscured galaxy W2305−0039 at z = 3.111, targeting the CO J = 7–6 and J = 11–10 lines. The... more »]]> Interpreting ALMA Multiwavelength Continuum Observations of PDS 70 c: An Optically Thick Dust Ring in the Circumplanetary Disk https://iopscience.iop.org/article/10.3847/2041-8213/ae86f5 https://iopscience.iop.org/article/10.3847/2041-8213/ae86f5 Sun, 19 Jul 2026 23:00:00 GMT SCIENCE Giant planets form small gas disks, called circumplanetary disks (CPDs), during gas accretion. The CPD of PDS 70 c has been detected by the Atacama Large Millimeter/submillimeter Array in (sub)millimeter continuum... more »]]> A Stellar Bar Hidden in an Extreme Gas-rich Disk Galaxy at z = 4.055 https://iopscience.iop.org/article/10.3847/2041-8213/ae84c7 https://iopscience.iop.org/article/10.3847/2041-8213/ae84c7 Sun, 19 Jul 2026 23:00:00 GMT SCIENCE The classical picture for the formation of stellar bars—key dynamical drivers of the evolution of galaxies—is through secular evolution of instability in gas-poor, stellar-dominated disks. The detection with the James... more »]]> Gaia Sees Blazars Move: Locating Optical Flares Using Astrometry https://iopscience.iop.org/article/10.3847/2041-8213/ae84d1 https://iopscience.iop.org/article/10.3847/2041-8213/ae84d1 Sun, 19 Jul 2026 23:00:00 GMT SCIENCE When blazars flare, their optical position moves. We show this by combining Gaia DR3 proper motions with epoch photometry for blazars with strong optical jet emission. In 60 of 74 sources with significant proper motion... more »]]> A flying saucer from outer space crash-landed in the https://apod.nasa.gov/apod/ap260719.html https://apod.nasa.gov/apod/ap260719.html Sun, 19 Jul 2026 00:00:00 GMT IMAGES thumb

A flying saucer from outer space crash-landed in the more »
]]> NASA’s James Webb catches a supermassive black hole feeding https://www.sciencedaily.com/releases/2026/07/260716023601.htm https://www.sciencedaily.com/releases/2026/07/260716023601.htm Sat, 18 Jul 2026 03:09:35 GMT NEWS JWST has captured unusually detailed images of gas feeding the supermassive black hole at the center of NGC 4696. A vast filament appears to funnel material into an 800-light-year-wide spinning disk, where gas races... more »]]> At sunset, an alignment of rainbow and mountain shadow https://apod.nasa.gov/apod/ap260718.html https://apod.nasa.gov/apod/ap260718.html Sat, 18 Jul 2026 00:00:00 GMT IMAGES thumb

At sunset, an alignment of rainbow and mountain shadow more »
]]> NGC 474 - оболочки, хвосты и сферы http://www.nebulacast.com/2026/07/ngc-474.html http://www.nebulacast.com/2026/07/ngc-474.html Fri, 17 Jul 2026 11:38:00 GMT NEBULACAST thumb

APOD, 12 июля 2026 года Что происходит с галактикой NGC 474 ? Вокруг нее видна сложная система слабых светящихся оболочек, хотя на обычных изображениях галактика выглядит как вполне типичная эллиптическая. Происхождение... more »
]]> 10,000 black holes are missing, but we’ve finally found 1 https://earthsky.org/space/10000-black-holes-are-missing-1-found-omega-centauri/ https://earthsky.org/space/10000-black-holes-are-missing-1-found-omega-centauri/ Fri, 17 Jul 2026 11:36:06 GMT NEWS thumb

View larger . | This star in the Omega Centauri globular cluster is the first astronomers have found to orbit a stellar-mass black hole . Astronomers think there should be 10,000 black holes of that size in this star... more »
]]> (untitled) https://apod.nasa.gov/apod/ap260717.html https://apod.nasa.gov/apod/ap260717.html Fri, 17 Jul 2026 00:00:00 GMT IMAGES thumb

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]]> [GAIA]: Возможно, существует совсем другой механизм обмена веществом в двойных звездах! http://www.nebulacast.com/2026/07/gaia_0331676907.html http://www.nebulacast.com/2026/07/gaia_0331676907.html Wed, 15 Jul 2026 07:00:00 GMT NEBULACAST thumb

Открытие систем Gaia BH1 и Gaia BH2 стало одним из самых неожиданных результатов миссии Gaia. В обеих системах небольшая звезда обращается вокруг черной дыры массой около девяти солнечных, причем орбиты оказались... more »
]]> Goddard | Хаббл заметил гигантский вампирский сендвич? http://www.nebulacast.com/2026/07/goddard_0808308514.html http://www.nebulacast.com/2026/07/goddard_0808308514.html Tue, 14 Jul 2026 12:31:38 GMT NEBULACAST thumb

Youtube | ВКонтакте | Дзен Космический телескоп NASA Hubble запечатлел самый крупный из когда-либо наблюдавшихся протопланетных дисков. Он расположен примерно в 1000 световых лет от Земли. Этот протопланетный диск... more »
]]> Сферы Дайсона вокруг белых и красных карликов могут оказаться гораздо заметнее, чем считалось http://www.nebulacast.com/2026/07/blog-post_13.html http://www.nebulacast.com/2026/07/blog-post_13.html Mon, 13 Jul 2026 06:13:11 GMT NEBULACAST thumb

Одним из самых известных признаков существования высокоразвитых внеземных цивилизаций считается сфера Дайсона — гипотетическая мегаструктура, полностью окружающая звезду и перехватывающая практически всю её энергию. В... more »
]]> Chandra | Молодые звезды затухают в рентгеновском диапазоне неожиданно быстро http://www.nebulacast.com/2026/07/chandra.html http://www.nebulacast.com/2026/07/chandra.html Wed, 08 Jul 2026 07:31:19 GMT NEBULACAST thumb

Youtube | Дзен | ВКонтакте | Рутьюб Учёные обнаружили, что молодые «родственники» нашего Солнца успокаиваются и уменьшают своё рентгеновское излучение быстрее, чем считалось ранее. Об этом говорится в новом исследовании... more »
]]> eROSITA обнаружила сейфертовскую галактику с «меняющимся обликом» http://www.nebulacast.com/2026/07/erosita.html http://www.nebulacast.com/2026/07/erosita.html Wed, 01 Jul 2026 06:18:00 GMT NEBULACAST thumb

Многопанельный график, показывающий, как со временем изменялась яркость объекта J1240–2309 в различных диапазонах волн. Верхняя панель демонстрирует рентгеновскую яркость, измеренную тремя космическими телескопами —... more »
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