scholarly journals Electron temperatures in W51 complex from high resolution, low frequency radio observations

2010 ◽  
Vol 31 (1) ◽  
pp. 43-58
Author(s):  
P. K. Srivastava ◽  
A. Pramesh Rao
Keyword(s):  
High Resolution ◽  
Low Frequency ◽  
Radio Observations

scholarly journals Low-frequency high-resolution radio observations of the TeV-emitting blazar SHBL J001355.9−185406

2014 ◽  
Vol 563 ◽  
pp. A135 ◽  
Author(s):  
Natalia Żywucka ◽  
Arti Goyal ◽  
Marek Jamrozy ◽  
Michał Ostrowski ◽  
Łukasz Stawarz
Keyword(s):  
High Resolution ◽  
Low Frequency ◽  
Radio Observations

Practical High Resolution Microscopy

1968 ◽  
Vol 26 ◽  
pp. 302-303
Author(s):  
P. A. Marsh ◽  
T. Mullens ◽  
D. Price
Keyword(s):  
High Resolution ◽  
Magnetic Fields ◽  
Low Frequency ◽  
Resolving Power ◽  
Careful Attention ◽  
Electron Microscopes ◽  
The Relationship ◽  
High Resolution Microscopy ◽  
New Facilities

It is possible to exceed the guaranteed resolution on most electron microscopes by careful attention to microscope parameters essential for high resolution work. While our experience is related to a Philips EM-200, we hope that some of these comments will apply to all electron microscopes.The first considerations are vibration and magnetic fields. These are usually measured at the pre-installation survey and must be within specifications. It has been our experience, however, that these factors can be greatly influenced by the new facilities and therefore must be rechecked after the installation is completed. The relationship between the resolving power of an EM-200 and the maximum tolerable low frequency interference fields in milli-Oerstedt is 10 Å - 1.9, 8 Å - 1.4, 6 Å - 0.8.

Low frequency radio observations: critical in revealing inhomogeneous shock structures

2019 ◽  
Author(s):  
Poonam Chandra ◽  
A. J. Nayana ◽  
Claes-Ingvar Bjornsson ◽  
Peter Lundqvist ◽  
Alak K. Ray
Keyword(s):  
Low Frequency ◽  
Radio Observations

scholarly journals Low Frequency Radio Observations of GRS 1915+105 with GMRT

2005 ◽  
Vol 5 (S1) ◽  
pp. 87-92 ◽  
Author(s):  
C H Ishwara-Chandra ◽  
A Pramesh Rao ◽  
Mamta Pandey ◽  
R K Manchanda ◽  
Philippe Durouchoux
Keyword(s):  
Low Frequency ◽  
Radio Observations

scholarly journals High-resolution radio observations of the Seyfert galaxy NGC 1068

1983 ◽  
Vol 202 (3) ◽  
pp. 647-656 ◽  
Author(s):  
A. Pedlar ◽  
R. V. Booler ◽  
R. E. Spencer ◽  
O. J. Stewart
Keyword(s):  
High Resolution ◽  
Seyfert Galaxy ◽  
Radio Observations ◽  
Ngc 1068

scholarly journals Low frequency (74 MHz) radio continuum observations of the inner 13° × 7° of the Galactic center

2013 ◽  
Vol 9 (S303) ◽  
pp. 464-466
Author(s):  
M. Rickert ◽  
F. Yusef-Zadeh ◽  
C. Brogan
Keyword(s):  
High Resolution ◽  
Molecular Cloud ◽  
Supernova Remnant ◽  
Galactic Center ◽  
Low Frequency ◽  
Radio Continuum ◽  
Large Array ◽  
Very Large Array ◽  
Image Displays ◽  
Western Side

AbstractWe analyze a high resolution (114″ × 60″) 74 MHz image of the Galactic center taken with the Very Large Array (VLA). We have identified several absorption and emission features in this region, and we discuss preliminary results of two Galactic center sources: the Sgr D complex (G1.1–0.1) and the Galactic center lobe (GCL).The 74 MHz image displays the thermal and nonthermal components of Sgr D and we argue the Sgr D supernova remnant (SNR) is consistent with an interaction with a nearby molecular cloud and the location of the Sgr D Hii region on the near side of the Galactic center. The image also suggests that the emission from the eastern side of the GCL contains a mixture of both thermal and nonthermal sources, whereas the western side is primarily thermal.

High-resolution and wideband optical vector analysis using fixed low-frequency detection

2021 ◽  
Author(s):  
Ting Qing ◽  
Shupeng Li ◽  
Lihan Wang ◽  
Xiaohu Tang ◽  
Ping Li ◽  
...  
Keyword(s):  
High Resolution ◽  
Low Frequency ◽  
Vector Analysis ◽  
Frequency Detection

COMPARATIVE ANALYSIS OF SPECTRA OF THE 2000-YEAR NORTHERN HEMISPHERE AVERAGE SURFACE AIR TEMPERATURE RECONSTRUCTIONS

2021 ◽  
pp. 5-13
Author(s):  
N. M. DATSENKO ◽  
◽  
D. M. SONECHKIN ◽  
B. YANG ◽  
J.-J. LIU ◽  
...  
Keyword(s):  
High Resolution ◽  
Northern Hemisphere ◽  
Air Temperature ◽  
Wavelet Transforms ◽  
Spectral Composition ◽  
Low Frequency ◽  
Surface Air Temperature ◽  
Temporal Variations ◽  
Continuous Wavelet Transforms ◽  
Stable Estimation

The spectral composition of temporal variations in the Northern Hemisphere mean surface air temperature is estimated and compared in 2000-year paleoclimatic reconstructions. Continuous wavelet transforms of these reconstructions are used for the stable estimation of energy spectra. It is found that low-frequency parts of the spectra (the periods of temperature variations of more than 100 years) based on such high-resolution paleoclimatic indicators as tree rings, corals, etc., are similar to the spectrum of white noise, that is never observed in nature. This seems unrealistic. The famous reconstruction called “Hockey Stick” is among such unrealistic reconstructions. Reconstructions based not only on high-resolution but also on low-resolution indicators seem to be more realistic, since the low-frequency parts of their spectra have the pattern of red noise. They include the “Boomerang” reconstruction showing that some warm periods close to the present-day one were observed in the past.

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