Quasar quartet embedded in giant nebula reveals rare massive structure in distant universe [PDF]
Science, 2015 In a cluster of protogalaxies far, far away Astronomers constantly scour the sky for astronomical objects that can provide insight and constrain their models and simulations of galaxy evolution. Hennawi et al.
J. Hennawi +5 more
semanticscholar +1 more source
Nebula/DSCR1 upregulation delays neurodegeneration and protects against APP-induced axonal transport defects by restoring calcineurin and GSK-3β signaling. [PDF]
PLoS Genetics, 2013 Post-mortem brains from Down syndrome (DS) and Alzheimer's disease (AD) patients show an upregulation of the Down syndrome critical region 1 protein (DSCR1), but its contribution to AD is not known.
Jillian L Shaw, Karen T Chang
doaj +1 more source
Discovery of an Enormous Lyα Nebula in a Massive Galaxy Overdensity at z = 2.3 [PDF]
, 2016 Enormous Lyα nebulae (ELANe), unique tracers of galaxy density peaks, are predicted to lie at the nodes and intersections of cosmic filamentary structures.
Z. Cai +14 more
semanticscholar +1 more source
From ambivalence to vulnerability: Recognition and the subject
Journal for the Theory of Social Behaviour, Volume 52, Issue 4, Page 595-608, December 2022., 2022 Abstract Recent writings on recognition and ambivalence highlight the limits of narrowly dyadic and teleological accounts of recognition. In this article, I extend the work on ambivalent recognition by proffering a conception of recognition as vulnerable.
Kate Schick
wiley +1 more source
Effects of Implementing Night Operation Signal Coordination on Arterials
Journal of Advanced Transportation, 2022 Traffic signal coordination, which connects a series of signals along an arterial by various coordination methodologies, has been proven as one of the most cost-effective means for alleviating traffic congestion.
Rui Yue +4 more
doaj +1 more source
An HST Snapshot Survey of Proto-Planetary Nebulae Candidates: Two Types of Axisymmetric Reflection Nebulosities [PDF]
ApJ, 528, 861, 1999 We report the results from an optical imaging survey of proto-planetary nebula candidates using the HST. We exploited the high resolving power and wide dynamic range of HST and detected nebulosities in 21 of 27 sources. All detected reflection nebulosities show elongation, and the nebula morphology bifurcates depending on the degree of the central star
arxiv +1 more source
GEMINGA’S PUZZLING PULSAR WIND NEBULA [PDF]
, 2016 We report on six new Chandra observations of the Geminga pulsar wind nebula (PWN). The PWN consists of three distinct elongated structures—two ≈ 0.2 d 250 pc long lateral tails and a segmented axial tail of ≈ 0.05 d 250 pc length, where d 250 = d / ( 250
B. Posselt +8 more
semanticscholar +1 more source
The influence of planetary nebula gas density fluctuations to its emission line spectra
Вісник Астрономічної школи, 2000 The set of spheric-simmetrical photoionization models of planetary nebula luminescence for different radial gas density distributions for central stars temperatures T = 50000 K and T = 100000 K was created.
N. V. Gavrilova, N. L. Tishko
doaj +1 more source
Two-zone model for the broadband Crab nebula spectrum: microscopic interpretation
EPJ Web of Conferences, 2017 We develop a simple two-zone interpretation of the broadband baseline Crab nebula spectrum between 10−5 eV and ~ 100 TeV by using two distinct log-parabola energetic electrons distributions.
Fraschetti F., Pohl M.
doaj +1 more source
High-resolution Radio Study of the Dragonfly Pulsar Wind Nebula Powered by PSR J2021+3651
The Astrophysical Journal, 2023 The Dragonfly Nebula (G75.2+0.1) powered by the young pulsar J2021+3651 is a rare pulsar wind nebula (PWN) that shows double tori and polar jets enclosed by a bow-shock structure in X-rays.
Ruolan Jin +3 more
doaj +1 more source