Results 71 to 80 of about 1,583 (233)
PAH and H2emission in the Ring Nebula
Journal of Physics: Conference Series, 2016 This paper presents the Spitzer IRS (Infra Red Spectrograph) detection of mid-infrared polycyclic aromatic hydrocarbon (PAH) emission features and H2 associated with dense knots in the ring of the "oxygen-rich" (C/O~0.6-0.8) planetary nebula (PN) NGC6720 (Ring Nebula). We explored a further three oxygen-rich extended PNe with similar dataset available.
Nick L. J. Cox +8 more
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The Astrophysical Journal LettersWe present JWST observations of the Crab Nebula, the iconic remnant of the historical SN 1054. The observations include NIRCam and MIRI imaging mosaics plus MIRI/MRS spectra that probe two select locations within the ejecta filaments.
Tea Temim +21 more
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Discovery of TeV gamma-ray emission from the pulsar wind nebula 3C 58 by MAGIC
EPJ Web of Conferences, 2016 The pulsar wind nebula (PWN) 3C 58 is one of the historical very-high-energy (VHE; E>100 GeV) gamma-ray source candidates. It has been compared to the Crab Nebula due to their morphological similarities.
López-Coto Rubén
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Emission-Line Profiles in Planetary Nebulae [PDF]
Symposium - International Astronomical Union, 1968 This research was undertaken with the idea of measuring as accurately as possible the internal-velocity distribution in planetary nebulae, in order to compare the observational measurements with hydrodynamical models of expanding nebulae. Much of the work was done in collaboration with J. S. Miller and D.W. Weedman.
openaire +2 more sources
A BROADBAND EMISSION MODEL OF MAGNETAR WIND NEBULAE [PDF]
The Astrophysical Journal, 2016 Angular momentum loss by the plasma wind is considered as a universal feature of isolated neutron stars including magnetars. The wind nebulae powered by magnetars allow us to compare the wind properties and the spin-evolution of magnetars with those of rotation-powered pulsars (RPPs).
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The radio emission from the galaxy and the andromeda nebula [PDF]
, 1958 J. E. Baldwin
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The Astrophysical JournalProgenitor stars of long gamma-ray bursts (GRBs) could be surrounded by a significant and complex nebula structure lying at a parsec-scale distance. After the initial release of energy from the GRB jet, the jet will interact with this nebula environment.
Asaf Pe’er, Felix Ryde
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The Emission Spectrum of the Extra-Galactic Nebula N. G. C. 1275 [PDF]
, 1932 M. L. Humason
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The Astrophysical JournalHD 148937 is a peculiar massive star (Of?p) with a strong magnetic field (1 kG). The hourglass-shaped emission nebula NGC 6164/5 surrounds this star. This nebula is presumed to originate from episodic mass-loss events of the central O-type star, but the ...
Beomdu Lim +3 more
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JWST Observations of the Ring Nebula (NGC 6720). III. A Dusty Disk around Its Central Star
The Astrophysical JournalThe planetary nebula NGC 6720, also known as the “Ring Nebula,” is one of the most iconic examples of nearby planetary nebulae whose morphologies present a challenge to our theoretical understanding of the processes that govern the deaths of most stars ...
Raghvendra Sahai +18 more
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