Results 41 to 50 of about 75,294 (208)
Planetary nebulae that cannot be explained by binary systems
, 2017 We examine the images of hundreds of planetary nebulae (PNe) and find that for about one in six PNe the morphology is too `messy' to be accounted for by models of stellar binary interaction.
Bear, Ealeal, Soker, Noam
core +1 more source
New candidate planetary nebulae in M81 [PDF]
, 2001 A 34 x 34 arcmin field centred on the spiral galaxy M81 has been searched for emission-line objects using the prime focus wide field camera (WFC) of the 2.54 m Isaac Newton Telescope (La Palma, Spain). A total of 171 candidate planetary nebulae (PNe) are
Corradi, R. L. M. +3 more
core +2 more sources
Alpha Element Abundances in a Large Sample of Galactic Planetary Nebulae
, 2010 We present emission line strengths, abundances, and element ratios (X/O for Ne, S, Cl, and Ar) for a sample of 38 Galactic disk planetary nebulae (PNe) consisting primarily of Peimbert classification Type I.
Asplund +26 more
core +1 more source
A distance scale of planetary nebulae based on mid-infrared data
, 2011 Some of the most successful statistical methods for obtaining distances of planetary nebulae (PNe) are based on their apparent sizes and radio emission intensities.
Copetti, M. V. F. +2 more
core +1 more source
The H\alpha\ surface brightness - radius relation: a robust statistical distance indicator for planetary nebulae [PDF]
, 2015 Measuring the distances to Galactic planetary nebulae (PNe) has been an intractable problem for many decades. We have now established a robust optical statistical distance indicator, the H$\alpha$ surface brightness- radius or S-r relation, which ...
Bojicic, I. S. +2 more
core +2 more sources
Substance Abuse Treatment, Prevention, and Policy, 2018 Background Pharmacological neuroenhancement (PNE) refers to the use of psychoactive substances without doctor’s prescription to enhance cognitive performance or to improve mood.
Christiana Bagusat +5 more
doaj +1 more source
PLoS ONE, 2021 This study aimed to develop culturally sensitive pain neuroscience education (PNE) materials for Hausa speaking patients with chronic spinal pain (CSP).
Naziru Bashir Mukhtar +5 more
doaj +1 more source
Multipolar Planetary Nebulae: Not as Geometrically Diversified as Thought [PDF]
, 2012 Planetary nebulae (PNe) have diverse morphological shapes, including point-symmetric and multipolar structures. Many PNe also have complicated internal structures such as torus, lobes, knots, and ansae.
Chibueze, James +4 more
core +2 more sources
Narrow band CCD imaging of four PNe [PDF]
Symposium - International Astronomical Union, 1997 We present first results of a project to construct and study spatio-kinematical models of selected Planetary Nebulae (PNe). Deep monochromatic CCD images of A8, A4, M2-55, and J-320 were made with the Calar Alto 2.2m telescope and the two interference filters 5005/90 and 6574/104 for the [O III] and Hα+[N II] emission lines.
A. Ali, J. Pfleiderer, W. Saurer
openaire +1 more source
Multidimensional Profiling of MRI‐Negative Temporal Lobe Epilepsy Uncovers Distinct Phenotypes
Annals of Clinical and Translational Neurology, EarlyView.ABSTRACT Objective Although hippocampal sclerosis (TLE‐HS) represents the most frequent cause of temporal lobe epilepsy (TLE), up to 30% of patients show no lesion on visual MRI inspection (TLE‐MRIneg). These cases pose diagnostic and therapeutic challenges and are underrepresented in surgical series.
Alice Ballerini +28 more
wiley +1 more source