Results 21 to 30 of about 4,278 (180)
Supernovae Origin for the Low-latitude Intermediate-velocity Arch and the North Celestial Pole Loop
The Astrophysical Journal, 2023 Supernova explosions attributed to the unseen companion in several binary systems identified by the Third Gaia Data Release (Gaia DR3) may be responsible for a number of well-known and well-studied features in the radio sky, including the low-latitude ...
J. T. Schmelz +3 more
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Search for thermonuclear burst oscillations in the Swift/BAT data set
Frontiers in Astronomy and Space SciencesThis study comprehensively analyzes type I X-ray bursts observed by Swift/BAT from 2005 to April 2024 to search for X-ray burst oscillations (XBOs) in neutron star low-mass X-ray binaries.
Qing-Xin Li +5 more
doaj +1 more source
The Astrophysical Journal Supplement SeriesWe design a convolutional neural network incorporating channel attention and spatial attention mechanisms to predict atmospheric parameters of hot subdwarfs.
Zhenxin Lei +6 more
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Angewandte Chemie International Edition, EarlyView.Azidoborylene photolysis results in the isolation of a reactive C═B═N═C heterocumulene bearing an ambiphilic boron centre. Addition of 3O2 to this species results in the clean conversion to a unique example of a dioxaborirane. ABSTRACT Oxidation of the formal boron(0) complex MeCAAC2B in the presence of tetrabutylammonium azide leads to the formation ...
Hayley King +4 more
wiley +1 more source
Discovery of a Long Thermonuclear X-Ray Burst from the Ultracompact Binary 4U 1850–087
The Astrophysical JournalWe report the detection of a long X-ray burst from the ultracompact binary 4U 1850–087. The type I X-ray burst was observed on MJD 60171.65 by the Monitor of All-sky X-ray Image and Neutron Star Interior Composition Explorer (NICER). We analyze the NICER
Yongqi Lu +4 more
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On carbon nanotubes in the interstellar medium [PDF]
Monthly Notices of the Royal Astronomical Society, 2020 ABSTRACT Since their discovery in 1991, carbon nanotubes (CNTs) – a novel one-dimensional carbon allotrope – have attracted considerable interest worldwide because of their potential technological applications such as electric and optical devices.
Li, Qi +3 more
openaire +2 more sources
OO Leo: An Active Contact Binary with Possible Solar-like Differential Rotation
The Astrophysical JournalWith Transiting Exoplanet Survey Satellite (TESS) high-precision photometry and Large Sky Area Multi-object Fiber Spectroscopic Telescope medium-resolution spectra, we present the first light and radial velocity curve analyses for the eclipsing binary OO
Zi-Bin Meng +4 more
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Chemistry – A European Journal, EarlyView.First controlled formation of cyanohexatriyne (HC7N) is achieved using a cobalt–alkyne masking strategy that overcomes the intrinsic instability of nitrile‐substituted polyynes. The approach enables spectroscopic validation of HC7N and reveals its pronounced electrophilicity through a selective conjugate addition with diethylamine.
Léa Lefrançois +4 more
wiley +1 more source
Quenching and Recovery of Persistent X-Ray Emission during a Superburst in 4U 1820–30
The Astrophysical JournalWe report the superburst from 4U 1820–30 in 2021 observed by the Monitor of All-sky X-ray Image and Neutron star Interior Composition Explorer (NICER).
Zhijiao Peng +8 more
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STELLA—Potential European contributions to a NASA-led interstellar probe
Frontiers in Astronomy and Space Sciences, 2022 The discovery of a myriad of exoplanets in the past decades has revolutionized the understanding of our place in the Universe. How different are exoplants and do some of them harbor life, just like Earth? To do so, their parent stars must drive a stellar
Robert F. Wimmer-Schweingruber +12 more
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