Results 41 to 50 of about 25,497 (219)
Digital Assistant for Arrival Scheduling with Conflict Prevention Capabilities
Information, 2023 Nowadays, in view of the growing traffic volume, an appropriate aircraft sequencing in the arrival sector is needed to maintain safety levels and improve the performance of the runway system and flight times.
Francesco Nebula +3 more
doaj +1 more source
Discovery of a nearby twin of SN1987A's nebula around the luminous blue variable HD168625: Was Sk--69 202 an LBV? [PDF]
Astron.J.133:1034-1040,2007, 2006 Spitzer images of the luminous blue variable (LBV) candidate HD168625 reveal the existence of a bipolar nebula several times larger than its previously-known equatorial dust torus. The outer nebula of HD168625 has a full extent of about 80 arcsec or 0.85 pc, and one of the lobes has a well-defined polar ring.
arxiv +1 more source
Photograph of the Nebula in Orion [PDF]
Nature, 1880 DURING the night of September 30 I succeeded in photographing the bright part of the nebula in Orion in the vicinity of the trapezium. The photographs show the mottled appearance of this region distinctly. I intend shortly to publish a detailed description of the negatives. They were taken by the aid of a triple objective of eleven inches aperture made
openaire +6 more sources
The Astrophysical JournalPolarization measurements provide insight into the magnetic field, a critical aspect of the dynamics and emission properties around the compact object.
Wei Deng +7 more
doaj +1 more source
Panchromatic HST/WFC3 Imaging Studies of Young, Rapidly Evolving Planetary Nebulae. II. NGC 7027
The Astrophysical Journal, 2022 The iconic planetary nebula (PN) NGC 7027 is bright, nearby ( D ∼ 1 kpc), highly ionized, intricately structured, and well observed. This nebula is hence an ideal case study for understanding PN shaping and evolution processes.
Paula Moraga Baez +4 more
doaj +1 more source
Circumstellar Disk Accretion Across the Lagoon Nebula: The Influence of Environment and Stellar Mass
The Astronomical JournalPre-main-sequence disk accretion is pivotal for determining the final stellar properties and the early conditions for close-in planets. We aim to establish the impact of internal (stellar mass) and external (radiation field) parameters on the disk ...
Laura Venuti +11 more
doaj +1 more source
Synchrotron heating by a fast radio burst in a self-absorbed synchrotron nebula and its observational signature [PDF]
, 2016 Fast radio bursts (FRBs) are mysterious transient sources. If extragalactic, as suggested by their relative large dispersion measures, their brightness temperatures must be extremely high. Some FRB models (e.g. young pulsar model, magnetar giant flare model, or supra-massive neutron star collapse model) suggest that they may be associated with a ...
arxiv +1 more source
The Astrophysical JournalThe Boomerang Nebula is a bright radio and X-ray pulsar wind nebula (PWN) powered by an energetic pulsar, PSR J2229+6114. It is spatially coincident with one of the brightest ultrahigh-energy (UHE; ≥100 TeV) gamma-ray sources, LHAASO J2226+6057.
Xiao-Bin Chen +3 more
doaj +1 more source
Scientific Reports, 2021 Multi-modal molecular profiling data in bulk tumors or single cells are accumulating at a fast pace. There is a great need for developing statistical and computational methods to reveal molecular structures in complex data types toward biological ...
Yize Zhao +4 more
doaj +1 more source