Results 11 to 20 of about 2,193 (202)

The Crab Nebula flaring activity

open access: yesPhysics Letters B, 2014
The discovery made by AGILE and Fermi of a short time scale flaring activity in the gamma-ray energy emission of the Crab Nebula is a puzzling and unexpected feature, challenging particle acceleration theory.
G. Montani, M.G. Bernardini
doaj   +4 more sources

Plasma Interactions in the Crab Nebula [PDF]

open access: bronzeSymposium - International Astronomical Union, 1971
Alfvén waves can be carried by the thermal plasma in the Crab Nebula. Each such wave perturbs the relativistic plasma present, in particular it strongly affects those particles which are in resonance with it. For a wave travelling parallel to the magnetic field the resonances are quite simple, but a wave travelling obliquely can give rise to multiple ...
F. D. Kahn
openalex   +3 more sources

A search for runaway stars in 12 Galactic supernova remnants

open access: yesAstronomische Nachrichten, Volume 342, Issue 3, Page 553-577, March 2021., 2021
Runaway stars can result from core‐collapse supernovae in multiple stellar systems. If the supernova disrupts the system, the companion is ejected with its former orbital velocity. A clear identification of a runaway star can yield the time and place of the explosion, as well as orbital parameters of the pre‐supernova binary system.
Oliver Lux   +3 more
wiley   +1 more source

Radio Polarization of the Crab Nebula [PDF]

open access: bronzeSymposium - International Astronomical Union, 1971
Optical and radio measurements of polarization can be combined to find the configuration of the magnetic field throughout the Crab Nebula. The component in the line of sight is found from the radio rotation measure.New measurements of polarisation at 11 cm with a resolution of 7′ x 14′ are combined with previous results to show that the rotation ...
R. G. Conway
openalex   +3 more sources

Observations of the Crab Nebula and Pulsar with the Large-sized Telescope Prototype of the Cherenkov Telescope Array

open access: yesThe Astrophysical Journal, 2023
The Cherenkov Telescope Array (CTA) is a next-generation ground-based observatory for gamma-ray astronomy at very high energies. The Large-Sized Telescope prototype (LST-1) is located at the CTA-North site, on the Canary Island of La Palma.
H. Abe   +289 more
doaj   +1 more source

The Crab Nebula’s Jet [PDF]

open access: yesSymposium - International Astronomical Union, 1983
Using deeply exposed Schmidt plates, van den Bergh (1970) discovered a peculiar jetlike feature extending about 100″ beyond the Crab Nebula's northern boundary. The feature roughly coincided with a spur in the outer intensity contour map of the Crab's continuum emission (5200–6400A) made by Woltjer (1957) from plates taken by Baade with the 200 inch ...
Robert A. Fesen, Theodore R. Gull
openaire   +2 more sources

Observations of the Crab nebula with HESS [PDF]

open access: yesAstronomy & Astrophysics, 2006
The Crab nebula was observed with the H.E.S.S. stereoscopic Cherenkov-telescope array between October 2003 and January 2005 for a total of 22.9 hours (after data quality selection). Observations were made with three operational telescopes in late 2003 and with the complete 4 telescope array in January - February 2004 and October 2004 - January 2005 ...
Aharonian, F.   +106 more
openaire   +3 more sources

H2 temperatures in the Crab Nebula [PDF]

open access: yesMonthly Notices of the Royal Astronomical Society, 2012
16 pages, 5 ...
Loh, E.   +6 more
openaire   +4 more sources

The dust content of the Crab Nebula [PDF]

open access: yesMonthly Notices of the Royal Astronomical Society, 2019
ABSTRACT We have modelled the near-infrared to radio images of the Crab Nebula with a Bayesian SED model to simultaneously fit its synchrotron, interstellar (IS), and supernova dust emission. We infer an IS dust extinction map with an average AV = 1.08 ± 0.38 mag, consistent with a small contribution (${\lesssim }22{{\ \rm per\ cent ...
F. D. Priestley   +10 more
openaire   +7 more sources

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