Results 141 to 150 of about 256,920 (281)

Radio Continuum Surveys of the Galaxy and Galaxies [PDF]

Symposium - International Astronomical Union, 2002
Radio sky surveys give us basic information about the origin of the radio emission from the Galaxy. By mapping the sky at several radio frequencies a separation of the thermal and non-thermal emission components is possible. The major part of the low-frequency radio emission comes from the synchrotron process, the braking of relativistic electrons in ...
openaire   +2 more sources

Clusters of Galaxies in the Radio: Relativistic Plasma and ICM/Radio Galaxy Interaction Processes [PDF]

, 2008
Lecture given by L. Feretti at the International Advanced School in Inaoe, Tonantzintla-Puebla, Mexico, 27th June - 8th July, 2005. To be published in Springer Lecture Notes in Physics, "Panchromatic View of Clusters of Galaxies and the Large-Scale Structure", Editors M. Plionis, O.
Gabriele Giovannini, Luigina Feretti
openaire   +4 more sources

Lessons from the void: What Boltzmann brains teach

Analytic Philosophy, EarlyView.
Abstract Some physical theories predict that almost all brains in the universe are Boltzmann brains, that is, short‐lived disembodied brains that are accidentally assembled as a result of thermodynamic or quantum fluctuations. Physicists and philosophers of physics widely regard this proliferation as unacceptable, and so take its prediction as a basis ...
Bradford Saad
wiley   +1 more source

Diagnostic Modalities in Sleep Disordered Breathing: Current and Emerging Technology and Its Potential to Transform Diagnostics

Respirology, EarlyView.
ABSTRACT Underpinned by rigorous clinical trial data, the use of existing home sleep apnoea testing is now commonly employed for sleep disordered breathing diagnostics in most clinical sleep centres globally. This has been a welcome addition for the field given the considerable burden of disease, cost, and access limitations with in‐laboratory ...
Lucía Pinilla, Ching Li Chai‐Coetzer, Danny J. Eckert   +2 more
wiley   +1 more source

What is the difference between radio galaxies and radio quasar galaxies?

The Astrophysical Journal, 1987
Deep optical imaging in the B and R band of about 50 luminous radio galaxies and radio QSOs in the redshift range 0.1-0.5 is reported. More than 80 percent of each type of object are optically interacting; about 60 percent are irregular in some way, and about 30 percent have tidal tails. Separations range from a few kpc to tens of kpc. About 30 percent
openaire   +2 more sources

Where are the ethical guidelines? Examining the governance of digital technologies and AI in Nigeria

Policy &Internet, Volume 17, Issue 1, March 2025.
Abstract The Nigerian government, under the administrations of Muhammadu Buhari (2015–2023) and Bola Tinubu (2023–2027), has made continued attempts to harness the opportunities of digital technologies and artificial intelligence (AI) to boost economic growth and development.
Muhammed Alakitan, Ebenezer Makinde
wiley   +1 more source

Constraining millimeter dust emission in nearby galaxies with NIKA2: The case of NGC2146 and NGC2976 [PDF]

EPJ Web of Conferences
This study presents the first millimeter continuum mapping observations of two nearby galaxies, the starburst spiral galaxy NGC2146 and the dwarf galaxy NGC2976, at 1.15 mm and 2 mm using the NIKA2 camera on the IRAM 30m telescope, as part of the ...
Ejlali G., Adam R., Ade P., Ajeddig H., André P., Artis E., Aussel H., Baes M., 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., Galliano F., Gomez A., Goupy J., Jones A.P., Hanser C., Hughes A., Katsioli S., Kéruzoré F., Kramer C., Ladjelate B., Lagache G., Leclercq S., Lestrade J.-F., Macías-Pérez J.F., Madden S. C., Maury A., Mauskopf P., Mayet F., Monfardini A., Moyer-Anin A., Muñoz-Echeverría M., Nersesian A., Pantoni L., Paradis D., Perotto L., Pisano G., Ponthieu N., Revéret V., Rigby A.J., Ritacco A., Romero C., Roussel H., Ruppin F., Schuster K., Sievers A., Smith M.W.S.L., Tabatabaei F.S., Tedros J., Tucker C., Xilouris E.M., Zylka R.   +59 more
doaj   +1 more source

CO Emission in Radio Galaxies at Low and High Redshift [PDF]

arXiv, 1998
CO observations of 0 1, P_408MHz > 10^27 Watts/Hz) are consistent with no evolution in molecular gas (H_2) mass with redshift and/or radio power.
arxiv  

Impact of Sudden Stratospheric Warming and Elevated Stratopause Events on the Very Low Frequency Radio Signal

Journal of Geophysical Research: Space Physics, Volume 130, Issue 3, March 2025.
Abstract Sudden Stratospheric Warmings (SSW) and Elevated Stratopause (ES) events are mid‐to‐high latitudinal, atmospheric wave‐driven phenomena leading to significant changes in wind, temperatures, and vertical mass transport, especially at stratospheric and mesospheric altitudes.
H. Schneider, V. Wendt, D. Banyś, M. Hansen, M. Clilverd, P. T. Verronen   +5 more
wiley   +1 more source

Nuclear and Star Formation Activities in Nearby Galaxies: Roles of Gas Supply and Active Galactic Nucleus Feedback

The Astrophysical Journal
We analyze a sample of  ~113,000 galaxies ( z  
Huynh Anh N. Le, Yongquan Xue
doaj   +1 more source