Simultaneous space and phase resolved X-ray polarimetry of the Crab pulsar and nebula [PDF]
Nature Astronomy, 2022 X-ray polarization measurements of the Crab nebula and pulsar by the IXPE satellite reveal a global toroidal magnetic field with large variations in local polarization, suggesting a more complex turbulence distribution than anticipated.
N. Bucciantini +100 more
semanticscholar +1 more source
Detection of polarized gamma-ray emission from the Crab nebula with the Hitomi Soft Gamma-ray Detector† [PDF]
Nippon Tenmon Gakkai obun kenkyu hokoku, 2018 We present the results from the Hitomi Soft Gamma-ray Detector (SGD) observation of the Crab nebula. The main part of SGD is a Compton camera, which in addition to being a spectrometer, is capable of measuring polarization of gamma-ray photons.
F. Aharonian +211 more
semanticscholar +1 more source
Disentangling multiple high-energy emission components in the Vela X pulsar wind nebula with the Fermi Large Area Telescope [PDF]
Astronomy & Astrophysics, 2018 Context. Vela X is a pulsar wind nebula in which two relativistic particle populations with distinct spatial and spectral distributions dominate the emission at different wavelengths. An extended 2° × 3° nebula is seen in radio and GeV gamma rays.
L. Tibaldo +6 more
semanticscholar +1 more source
Mapping NGC 7027 in New Light: CO+ and HCO+ Emission Reveal Its Photon- and X-Ray-dominated Regions
The Astrophysical Journal, 2022 The young and well-studied planetary nebula (PN) NGC 7027 harbors significant molecular gas that is irradiated by luminous, pointlike UV (central star) and diffuse (shocked nebular) X-ray emission.
Jesse Bublitz +9 more
doaj +1 more source
A PeVatron Candidate: Modeling the Boomerang Nebula in X-ray Band
Universe, 2022 Pulsar wind nebula (PWN) Boomerang and the associated supernova remnant (SNR) G106.3+2.7 are among candidates for the ultra-high-energy (UHE) gamma-ray counterparts published by LHAASO.
Xuan-Han Liang +4 more
doaj +1 more source
Erratum: Modelling the ArH+ emission from the Crab Nebula [PDF]
Monthly notices of the Royal Astronomical Society, 2017 We have performed combined photoionization and photodissociation region (PDR) modelling of a Crab Nebula filament subjected to the synchrotron radiation from the central pulsar wind nebula, and to a high flux of charged particles; a greatly enhanced ...
F. Priestley, M. Barlow, S. Viti
semanticscholar +1 more source
The Spatial and Emission Properties of the Large [O iii] Emission Nebula Near M31
The Astrophysical Journal, 2023 Drechsler et al. reported the unexpected discovery of a 1.°5 long [O iii ] emission nebula 1.°2 southeast of the M31 nucleus. Here we present additional images of this large emission arc, called the Strottner–Drechsler–Sainty Object (SDSO), along with ...
Robert A. Fesen +10 more
doaj +1 more source
The PAH Emission Characteristics of the Reflection Nebula NGC 2023 [PDF]
, 2017 We present 5–20 μm spectral maps of the reflection nebula NGC 2023 obtained with the Infrared Spectrograph SL and SH modes on board the Spitzer Space Telescope, which reveal emission from polycyclic aromatic hydrocarbons (PAHs), C60, and H2 superposed on
E. Peeters +5 more
semanticscholar +1 more source
Daily Monitoring of TeV Gamma-Ray Emission from Mrk 421, Mrk 501, and the Crab Nebula with HAWC [PDF]
, 2017 We present results from daily monitoring of gamma-rays in the energy range from ∼0.5 to ∼100 TeV with the first 17 months of data from the High Altitude Water Cherenkov (HAWC) Observatory.
A. Abeysekara +106 more
semanticscholar +1 more source
Improved Measurements of the IXPE Crab Polarization
The Astrophysical Journal, 2023 X-ray polarization from the Imaging X-ray Polarimetry Explorer (IXPE) provides an important new probe of the geometry of the pulsar emission zone and of particle acceleration in the surrounding pulsar wind nebula.
Josephine Wong +2 more
doaj +1 more source