Results 21 to 30 of about 25,497 (219)
High-resolution Radio Study of the Dragonfly Pulsar Wind Nebula Powered by PSR J2021+3651
The Astrophysical Journal, 2023 The Dragonfly Nebula (G75.2+0.1) powered by the young pulsar J2021+3651 is a rare pulsar wind nebula (PWN) that shows double tori and polar jets enclosed by a bow-shock structure in X-rays.
Ruolan Jin +3 more
doaj +1 more source
Complex molecules in the Orion Kleinmann-Low nebula
BIO Web of Conferences, 2014 In the framework of the delivery to the early Earth of extraterrestrial molecules, we have studied complex molecular species toward the Orion Kleinmann-Low nebula. This nebula is rich in molecules as well as in nascent stars and planetary systems.
Despois D. +7 more
doaj +1 more source
Effects of Implementing Night Operation Signal Coordination on Arterials
Journal of Advanced Transportation, 2022 Traffic signal coordination, which connects a series of signals along an arterial by various coordination methodologies, has been proven as one of the most cost-effective means for alleviating traffic congestion.
Rui Yue +4 more
doaj +1 more source
A Photometrically and Morphologically Variable Infrared Nebula in L483 [PDF]
, 2008 We present narrow and broad K-band observations of the Class 0/I source IRAS 18148-0440 that span 17 years. The infrared nebula associated with this protostar in the L483 dark cloud is both morphologically and photometrically variable on a time scale of only a few months.
arxiv +1 more source
Nature, 1877 IN NATURE, vol. xv. p. 201, in an account of the American Cambridge Observatory, it is stated that the nebula of Orion had not shown the slightest trace of resolvability under Lord Rosse's 3-feet reflector.
openaire +3 more sources
The Astrophysical Journal Letters, 2022 We report the discovery of giant (50−100 kpc) [O ii ] emitting nebulae with MUSE in the field of TXS 0206−048, a luminous quasar at z = 1.13. “Down-the-barrel” UV spectra of the quasar show absorption at velocities coincident with those of the extended ...
Sean D. Johnson +12 more
doaj +1 more source
Planetary nebulae in M32 and the bulge of M31: Line intensities and oxygen abundances [PDF]
, 1998 We present spectroscopy of planetary nebulae in M32 and in the bulge of M31 that we obtained with the MOS spectrograph at the Canada-France-Hawaii Telescope. Our sample includes 30 planetary nebulae in M31 and 9 planetary nebulae in M32. We also observed one H II region in the disk of M31. We detected [O III]$\lambda$4363 in 18 of the planetary nebulae,
arxiv +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
On the Structure and Kinematics of Nebulae around LBVs and LBV Candidates in the LMC [PDF]
Astron.Astrophys.408:205-230,2003, 2003 We present a detailed analysis of the morphology and kinematics of nebulae around LBVs and LBV candidates in the Large Magellanic Cloud. HST images and high-resolution Echelle Spectra were used to determine the size, shape, brightness, and expansion velocities of the LBV nebulae around R127, R143, and S61.
arxiv +1 more source