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Reduced contribution of sulfur to the mass extinction associated with the Chicxulub impact event
Published 2025-01-01“…Abstract The Chicxulub asteroid impact event at the Cretaceous-Paleogene (K-Pg) boundary ~66 Myr ago is widely considered responsible for the mass extinction event leading to the demise of the non-avian dinosaurs. …”
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Star-forming Nuclear Clusters in Dwarf Galaxies Mimicking Active Galactic Nucleus Signatures in the Mid-infrared
Published 2025-01-01“…We find that these galaxies are host to very massive (~10 ^7 M _⊙ ), extremely young (≲8 Myr), and dusty (0.6 ≲ A _v ≲ 1.8) NSCs. Our results indicate that these galactic nuclei have ongoing star formation, are still at least partially obscured by clouds of gas and dust, and are most likely producing the extremely red AGN-like mid-IR colors. …”
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23
Suzaku Observations of the Cold Front in A3667: A Nonequilibrium Ionization State of the Intracluster Medium
Published 2025-01-01“…The timescale calculated from the ionization parameter of the ICM inside the cold front is ${3.9}_{-0.8}^{+0.7}\,\mathrm{Myr}$ , which is much shorter than the thermal equilibration timescale. …”
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24
Discovery of Metal-poor and Distant Pre–Main Sequence Candidates in WLM with JWST
Published 2025-01-01“…These candidates have masses between 1.25 and 5 M _⊙ , with ages <10 Myr, and exhibit significant near-infrared excesses at 2.5 and 4.3 μ m. …”
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25
Possible Factors Influencing the Seroprevalence of Dengue among Residents of the Forest Fringe Areas of Peninsular Malaysia
Published 2020-01-01“…Analysis on the demographic and socioeconomic variables suggested that high seroprevalence of dengue was significantly associated with those above 13 years old and a low household income of less than MYR500 (USD150). It was also associated with the vast presence of residential areas and the presence of a lake. …”
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26
High-resolution investigations of fault architecture in space and time
Published 2025-01-01“…Our approach is applied to the Carboneras Fault, unveiling a ~ 25 Myr-long polyphase structural and thermal evolution. …”
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Ejective Feedback as a Quenching Mechanism in the First 1.5 Billion Years of the Universe: Detection of Neutral Gas Outflow in a z = 4 Recently Quenched Galaxy
Published 2025-01-01“…Based on James Webb Space Telescope spectrum, the star formation rate (SFR) of this has been declining with a rapid e -folding timescale of ∼50 Myr. The current specific SFR is 5 × 10 ^−11 yr ^−1 , roughly 40 times lower than that of the star-forming main sequence at comparable redshifts. …”
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28
BST1047+1156: A (Failing) Ultradiffuse Tidal Dwarf in the Leo I Group
Published 2024-01-01“…Instead, we clearly detect the red and blue helium-burning sequences of its stellar populations, as well as the fainter blue main sequence, all indicative of a recent burst of star formation having taken place over the past 50–250 Myr. Comparing to isochrones for young metal-poor stellar populations, we infer this post-starburst population to be moderately metal-poor, with metallicity [ M/H ] in the range −1 to −1.5. …”
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Academician V. H. Serheiev – Control System Designer, Founder of the Scientific and Design School, Honored Citizen of Kharkiv (on His 110th Birthday)
Published 2024-09-01“…The article features innovative solutions implemented under Serheiev’s leadership during the creation of the Energia launch vehicle, supply vehicles of the Almaz space rocket system and target orbital modules of the Saliut and Myr space stations, and international launch vehicles Dnipro, Rokit and Strila. …”
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30
A review of vegetable waste bio-processing techniques in rural areas
Published 2024-03-01“…Besides composting emerged as a cost-effective (for MYR 1.40/kg) bio-processing technique in terms of production cost. …”
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An In-depth Investigation of the Primordial Cluster Pair ASCC 19 and ASCC 21
Published 2025-01-01“…Utilizing Gaia data from the literature, we report a new young (∼8.9 Myr) cluster pair, ASCC 19 and ASCC 21, located near the Orion star-forming complex. …”
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32
Epsilon Canis Majoris: The Brightest Extreme-ultraviolet Source with Surprisingly Low Interstellar Absorption
Published 2025-01-01“…With its 27.3 ± 0.4 km s ^−1 heliocentric radial velocity and small proper motion, ϵ CMa passed within 9.3 ± 0.5 pc of the Sun 4.4 Myr ago, with a 180 times higher photoionization rate.…”
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Stellar X-Ray Variability and Planetary Evolution in the DS Tucanae System
Published 2025-01-01“…We present an analysis of four Chandra observations of the 45 Myr old DS Tuc binary system. We observed X-ray variability of both stars on timescales from hours to months, including two strong X-ray flares from star A. …”
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Minor-merger-induced Star Formation Rejuvenation in an Elliptical Radio-loud Quasar Host, 3C 59
Published 2025-01-01“…The inferred star formation history of 3C 59 has shown significant star formation rejuvenation within the past 500 Myr, before which it remained rather quiescent for most of the cosmic time. …”
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Figuring Out Gas and Galaxies In Enzo (FOGGIE). VIII. Complex and Stochastic Metallicity Gradients at z > 2
Published 2025-01-01“…By tracking the metallicity gradient at a rapid cadence of simulation outputs (∼5–10 Myr), we find that theoretical gradients are highly stochastic: the FOGGIE galaxies spend ∼30%–50% of their time far away from a smoothed trajectory inferred from analytic models or other, less high-cadence simulations. …”
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Pathogenic potential of ornithogenic <i>Escherichia coli</i> strains detected in the Earth's polar regions
Published 2024-12-01“…For example, cgST 133718 was observed in Antarctica (strain 17_1myr) and in the UK, and sequence 11903, to which strain 32-1 from the northernmost point of Novaya Zemlya belonged, was previously identified in the USA. …”
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History and Habitability of the LP 890-9 Planetary System
Published 2025-01-01“…We find the magma ocean stage can last up to 50 Myr, remove eight Earth oceans of water, and leave up to 2000 bars of oxygen in the atmosphere. …”
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