Low-frequency flux-density measurements and spectral features of millisecond pulsars

2000 ◽  
Vol 26 (8) ◽  
pp. 500-505 ◽  
Author(s):  
A. D. Kuzmin ◽  
B. Ya. Losovsky
Keyword(s):  
Flux Density ◽  
Low Frequency ◽  
Spectral Features ◽  
Millisecond Pulsars ◽  
Density Measurements

scholarly journals A LOFAR census of non-recycled pulsars: extending to frequencies below 80 MHz

2020 ◽  
Vol 635 ◽  
pp. A75 ◽  
Author(s):  
A. V. Bilous ◽  
L. Bondonneau ◽  
V. I. Kondratiev ◽  
J.-M. Grießmeier ◽  
G. Theureau ◽  
...  
Keyword(s):  
Flux Density ◽  
Low Frequency ◽  
Spectral Indices ◽  
Low Frequencies ◽  
Density Measurements ◽  
High Band

We present the results from the low-frequency (40–78 MHz) extension of the first pulsar census of non-recycled pulsars carried out with the LOw-Frequency ARray (LOFAR). We used the low-band antennas of the LOFAR core stations to observe 87 pulsars out of 158 that had been previously detected using high-band antennas. We present flux densities and flux-calibrated profiles for the 43 pulsars we detected. Of this sample, 17 have not, to our knowledge, previously been detected at such low frequencies. Here we recalculate the spectral indices using the new low-frequency flux density measurements from the LOFAR census and discuss the prospects of studying pulsars at very low frequencies using current and upcoming facilities, such as the New Extension in Nançay Upgrading LOFAR (NenuFAR).

scholarly journals Low-frequency Flux Density Measurements and Pulsars with GHz-peaked Spectra

2021 ◽  
Vol 923 (2) ◽  
pp. 211
Author(s):  
J. Kijak ◽  
R. Basu ◽  
W. Lewandowski ◽  
K. Rożko
Keyword(s):  
Flux Density ◽  
High Frequency ◽  
Supernova Remnant ◽  
Low Frequency ◽  
Physical Parameters ◽  
Absorption Model ◽  
Pulsar Wind Nebulae ◽  
Entire Sample ◽  
Density Measurements ◽  
Pulsar Wind

Abstract We have estimated flux densities of several pulsars from radio interferometric observations mainly at 325 MHz using the Giant Metrewave Radio Telescope. The new observations allowed us to update the spectral nature of the observed pulsars, and in six sources we identified relatively high frequency turnovers, which can be classified as new GHz-peaked spectrum (GPS) pulsars. For such objects the turnover in the spectrum is most likely caused by absorption in the immediate vicinity of the pulsar (or in the interstellar medium). We modeled the turnover spectra using the thermal free–free absorption model and the physical parameters obtained from the fits enabled us to identify the environments that could potentially be responsible for the observed absorption, such as pulsar wind nebulae, supernova remnant nebulae or H ii regions. The discovery of 6 new GPS pulsars brings the total number of such objects to 33 and we discuss the properties of the entire sample.

A thermoelectric device for ophthalmic heat flux density measurements: results of piloting in healthy individuals

2019 ◽  
Vol 80 (3) ◽  
pp. 45-51
Author(s):  
L. Anatychuk ◽  
N. Pasyechnikova ◽  
V. Naumenko ◽  
O. Zadorozhnyy ◽  
R. Kobylianskyi ◽  
...  
Keyword(s):  
Heat Flux ◽  
Flux Density ◽  
Heat Flux Density ◽  
Thermoelectric Device ◽  
Healthy Individuals ◽  
Density Measurements

scholarly journals Spectral features of SKR observed by Cassini/RPWS: Frequency bandwidth, flux density and polarization

2007 ◽  
Vol 112 (A11) ◽  
pp. n/a-n/a ◽  
Author(s):  
Patrick H. M. Galopeau ◽  
Mohammed Y. Boudjada ◽  
Alain Lecacheux
Keyword(s):  
Flux Density ◽  
Spectral Features ◽  
Frequency Bandwidth
Sign in / Sign up

Export Citation Format

Share Document