Results 1 to 10 of about 2,193 (202)

(Noble Gas)_n -NC⁺ Molecular Ions in Noble Gas Matrices: Matrix Infrared Spectra and Electronic Structure Calculations. [PDF]

Chemistry, 2022
CCSD(T) calculated Ng−C−N+ structures and observed frequencies. The bond lengths on top are in Å unit, the natural charges in blue below atoms, and the observed C−N stretching frequencies (cm−1) in a matrix of noble gas on right side. Reactions of laser ablated Zn, Cd, and Hg atoms with HCN have provided an opportunity to observe photoionization of CN,
Tsegaw YA, Li H, Andrews L, Cho HG, Voßnacker P, Beckers H, Riedel S.   +6 more
europepmc   +2 more sources

Shedding new light on the Crab with polarized X-rays [PDF]

Scientific Reports, 2017
Strong magnetic fields, synchrotron emission, and Compton scattering are omnipresent in compact celestial X-ray sources. Emissions in the X-ray energy band are consequently expected to be linearly polarized. X-ray polarimetry provides a unique diagnostic
M. Chauvin, H.-G. Florén, M. Friis, M. Jackson, T. Kamae, J. Kataoka, T. Kawano, M. Kiss, V. Mikhalev, T. Mizuno, N. Ohashi, T. Stana, H. Tajima, H. Takahashi, N. Uchida, M. Pearce   +15 more
doaj   +2 more sources

Scaled laboratory experiments explain the kink behaviour of the Crab Nebula jet [PDF]

Nature Communications, 2016
The periodical change of the Crab nebula’s jet direction challenges our understanding of astrophysical jet dynamics. Here the authors use high-power lasers to create a jet that can be directly compared to the Crab nebula’s, and report the detection of ...
C. K. Li, P. Tzeferacos, D. Lamb, G. Gregori, P. A. Norreys, M. J. Rosenberg, R. K. Follett, D. H. Froula, M. Koenig, F. H. Seguin, J. A. Frenje, H. G. Rinderknecht, H. Sio, A. B. Zylstra, R. D. Petrasso, P. A. Amendt, H. S. Park, B. A. Remington, D. D. Ryutov, S. C. Wilks, R. Betti, A. Frank, S. X. Hu, T. C. Sangster, P. Hartigan, R. P. Drake, C. C. Kuranz, S. V. Lebedev, N. C. Woolsey   +28 more
doaj   +2 more sources

Pulsar Emissions, Signal Modeling and Passive ISAR Imaging [PDF]

Sensors, 2019
The present work addresses pulsar Crab Nebula emissions from point of view of their modeling and applications for asteroid detection and imaging by applying inverse synthetic aperture radar (ISAR) principles.
Andon Lazarov
doaj   +2 more sources

ON THE POLARIZATION OF THE CRAB NEBULA ON THE WAVELENGTH 20 CM [PDF]

Proc Natl Acad Sci U S A, 1963
V. A. Udaltzov
europepmc   +3 more sources

The NIKA polarimeter on science targets: Crab nebula observations at 150 GHz and dual-band polarization images of Orion Molecular Cloud OMC-1 [PDF]

EPJ Web of Conferences, 2020
We present here the polarization system of the NIKA camera and give a summary of the main results obtained and performed studies on Orion and the Crab nebula.
Ritacco A., Adam R., Ade P., André P., Andrianasolo A., Aussel H., Beelen A., Benoît A., Bideaud A., Bourrion O., Calvo M., Catalano A., Comis B., De Petris M., Désert F.-X., Doyle S., Driessen E.F.C., Gomez A., Goupy J., Kéruzoré F., Kramer C., Ladjelate B., Lagache G., Leclercq S., Lestrade J.-F., Macías-Pérez J.F., Mauskopf P., Maury A., Mayet F., Monfardini A., Perotto L., Pisano G., Ponthieu N., Revéret V., Romero C., Roussel H., Ruppin F., Schuster K., Shu S., Sievers A., Tucker C., Zylka R.   +41 more
doaj   +1 more source

Ar+ ArH+ Reactive Collisions of Astrophysical Interest: The Case of 36Ar

ChemPhysChem, Volume 24, Issue 20, October 17, 2023., 2023
A complete theoretical investigation of the 36Ar+36ArH+ reactive collision involving the most abundant Argon isotope in the interstellar medium. Abstract The reactive collision between 36Ar and the 36ArH+ species has been investigated by means of quantum mechanical (QM), quasiclassical trajectories (QCT) and statistical quantum mechanical (SQM ...
María Judit Montes de Oca‐Estévez, Beatriz Darna, Borja García‐Ruiz, Rita Prosmiti, Tomás González‐Lezana, Debasish Koner   +5 more
wiley   +1 more source

Metal in mesosiderites: Evidence for redox and fractional crystallization

Meteoritics &Planetary Science, Volume 58, Issue 9, Page 1211-1228, September 2023., 2023
Abstract Mesosiderites are an amalgamation of crustal silicates and molten metal, and their formational history is not well understood. It is widely believed that redox reactions occurred in the mesosiderites during metal–silicate mixing. Previous studies evaluated redox reactions by studying the silicates within mesosiderites, but little attention has
R. G. Mayne, L. Caves, T. J. McCoy, R. D. Ash, W. F. McDonough   +4 more
wiley   +1 more source

Long‐Term Density Trend in the Mesosphere and Lower Thermosphere From Occultations of the Crab Nebula With X‐Ray Astronomy Satellites

Journal of Geophysical Research: Space Physics, Volume 128, Issue 2, February 2023., 2023
Abstract We present long‐term density trends of the Earth's upper atmosphere at altitudes between 71 and 116 km, based on atmospheric occultations of the Crab Nebula observed with X‐ray astronomy satellites, ASCA, RXTE, Suzaku, NuSTAR, and Hitomi. The combination of the five satellites provides a time period of 28 years from 1994 to 2022.
Satoru Katsuda, Teruaki Enoto, Andrea N. Lommen, Koji Mori, Yuko Motizuki, Motoki Nakajima, Nathaniel C. Ruhl, Kosuke Sato, Gunter Stober, Makoto S. Tashiro, Yukikatsu Terada, Kent S. Wood   +11 more
wiley   +1 more source

Crab nebula at 260 GHz with the NIKA2 polarimeter: Implications for the polarization angle calibration of future CMB experiments [PDF]

EPJ Web of Conferences, 2022
The quest for primordial gravitational waves enclosed in the Cosmic Microwave Background (CMB) polarization B-modes signal motivates the development of a new generation of high sensitive experiments (e.g.
Ritacco A., Adam R., Ade P., Ajeddig H., André P., Artis E., Aumont J., Aussel H., Beelen A., Benoît A., Berta S., Bing L., Bourrion O., Calvo M., Catalano A., De Petris M., Désert F.-X., Doyle S., Driessen E. F. C., Gomez A., Goupy J., Kéruzoré F., Kramer C., Ladjelate B., Lagache G., Leclercq S., Lestrade J.-F., Macías-Pérez J.-F., Maury A., Mauskopf P., Mayet F., Monfardini A., Muñoz-Echeverría M., Perotto L., Pisano G., Ponthieu N., Revéret V., Rigby A. J., Romero C., Roussel H., Ruppin F., Schuster K., Shu S., Sievers A., Tucker C., Zylka R.   +45 more
doaj   +1 more source