Results 71 to 80 of about 1,899,768 (248)
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
PHL 932: when is a planetary nebula not a planetary nebula? [PDF]
, 2009 The emission nebula around the subdwarf B (sdB) star PHL 932 is currently classified as a planetary nebula (PN) in the literature. Based on a large body of multi-wavelength data, both new and previously published, we show here that this low-excitation nebula is in fact a small Stromgren sphere (HII region) in the interstellar medium around this star ...
arxiv +1 more source
Antipode, Volume 57, Issue 3, Page 907-929, May 2025.Abstract The brazen political antics and mystifying logics accompanying the contemporary rise of authoritarianism have garnered much interest in academic and popular media. A key question is how to make sense of a politics that seems nonsensical?
Sierra Deutsch +3 more
wiley +1 more source
The Distribution and Excitation of CH3CN in a Solar Nebula Analog [PDF]
Astrophysical Journal, 2018 Cometary studies suggest that the organic composition of the early Solar Nebula was rich in complex nitrile species such CH3CN. Recent ALMA detections in protoplanetary disks suggest that these species may be common during planet and comet formation, but
R. Loomis +7 more
semanticscholar +1 more source
JWST/MIRI Study of the Enigmatic Mid-infrared Rings in the Planetary Nebula NGC 1514
The Astronomical JournalWhile NGC 1514 is an elliptical, but complex, planetary nebula at optical wavelengths, it was discovered to have a pair of infrared-bright, axisymmetric rings contained within its faint outer shell during the course of the Wide-field Infrared Survey ...
Michael E. Ressler +5 more
doaj +1 more source
Pulsar Wind Nebulae with Thick Toroidal Structure [PDF]
, 2011 We investigate a class of pulsar wind nebulae that show synchrotron emission from a thick toroidal structure. The best studied such object is the small radio and X-ray nebula around the Vela pulsar, which can be interpreted as the result of interaction of a mildly supersonic inward flow with the recent pulsar wind.
arxiv +1 more source
British Educational Research Journal, Volume 51, Issue 2, Page 826-847, April 2025.Abstract This study addresses the complex challenges of childhood obesity, food poverty and environmental degradation by developing a planetary health framework for school food in education. Drawing on Dewey's experiential learning philosophy, it adopts an integrative approach where school meals and food education converge.
Fatma Sabet, Steffen Böhm
wiley +1 more source
The large- and small-scale properties of the intergalactic gas in the Slug Ly α nebula revealed by MUSE Heiiemission observations [PDF]
Monthly notices of the Royal Astronomical Society, 2018 With a projected size of about 450 kpc at z~2.3, the Slug Ly-alpha nebula is a rare laboratory to study, in emission, the properties of the intergalactic gas in the Cosmic Web.
S. Cantalupo +13 more
semanticscholar +1 more source
The Crab Pulsar and Nebula as Seen in Gamma-Rays
Universe, 2021 Slightly more than 30 years ago, Whipple detection of the Crab Nebula was the start of Very High Energy gamma-ray astronomy. Since then, gamma-ray observations of this source have continued to provide new surprises and challenges to theories, with the ...
Elena Amato, Barbara Olmi
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