A Search for Radio Recombination Lines of Positronium Near the Galactic Center

1989 ◽  
pp. 607-616 ◽  
Author(s):  
K. R. Anantharamaiah ◽  
V. Radhakrishnan ◽  
D. Morris ◽  
M. Vivekanand ◽  
D. Downes ◽  
...  
Keyword(s):  
Galactic Center ◽  
Radio Recombination Lines

scholarly journals GBT and VLA investigation of the ionized gas towards the Galactic center

2013 ◽  
Vol 9 (S303) ◽  
pp. 92-93 ◽  
Author(s):  
M. J. Royster ◽  
F. Yusef-Zadeh
Keyword(s):  
Galactic Center ◽  
Thermal Flux ◽  
Global Scale ◽  
Large Array ◽  
Ionized Gas ◽  
Very Large Array ◽  
Preliminary Results ◽  
Radio Recombination Lines ◽  
Green Bank Telescope

AbstractWe report results of a study of the ionized gas towards the Galactic center with radio recombination lines at cm wavelengths. Both the Green Bank Telescope and the Very Large Array were utilized to probe the kinematics of the ionized gas on a global scale for both diffuse and discrete sources within the inner 2.0° × 0.5° (l × b). A diffuse ∼0 km s−1 gas, a thermal flux continuum fraction exceeding 40%, and an asymmetry where ∼70% of the ionized gas is found at positive Galactic longitudes are the preliminary results briefly discussed here.

scholarly journals A Search for Radio Recombination Lines of Positronium Near the Galactic Center

1989 ◽  
Vol 136 ◽  
pp. 607-616 ◽  
Author(s):  
K. R. Anantharamaiah ◽  
V. Radhakrishnan ◽  
D. Morris ◽  
M. Vivekanand ◽  
D. Downes ◽  
...  
Keyword(s):  
Production Rate ◽  
Galactic Center ◽  
Absorption Feature ◽  
Recombination Line ◽  
Radio Recombination Lines ◽  
Upper Limit ◽  
Positron Production

Several attempts were made to detect the possible radio recombination lines of positronium near the galactic center. An absorption feature seen at λ6cm, in the D-configuration of the VLA was not confirmed by subsequent observations at λ6cm and λ20cm using the B and C configurations of the VLA. An observation at λ3mm using the IRAM 30m telescope also did not detect any line. On the basis of one recombination line photon for every positron (McClintock 1984), our non-detections imply an upper limit to the positron production rate of < 3.1 × 1043 s−1, within about 2″ of the galactic center.

A Survey of Radio Recombination Lines Toward the Galactic Center

1973 ◽  
Vol 182 ◽  
pp. 25 ◽  
Author(s):  
Felix J. Lockman ◽  
M. A. Gordon
Keyword(s):  
Galactic Center ◽  
Radio Recombination Lines

scholarly journals RADIO RECOMBINATION LINES TOWARD THE GALACTIC CENTER LOBE

2009 ◽  
Vol 695 (2) ◽  
pp. 1070-1081 ◽  
Author(s):  
C. J. Law ◽  
D. Backer ◽  
F. Yusef-Zadeh ◽  
R. Maddalena
Keyword(s):  
Galactic Center ◽  
Radio Recombination Lines

Low-frequency radio recombination lines: observations and data processing

2017 ◽  
Vol 23 (1) ◽  
pp. 50-53
Author(s):  
A.A. Konovalenko ◽  
◽  
S.V. Stepkin ◽  
E.V. Vasilkovskiy ◽  
◽  
...  
Keyword(s):  
Data Processing ◽  
Low Frequency ◽  
Radio Recombination Lines

POPULATION OF DOUBLE WHITE DWARFS IN THE GALACTIC CENTER

2020 ◽  
Vol 3 (331) ◽  
pp. 15-20
Author(s):  
Taras Panamarev ◽  
◽  
Aigerim Otebay ◽  
Bekdaulet Shukirgaliyev ◽  
Mukhagali Kalambay ◽  
...  
Keyword(s):  
White Dwarfs ◽  
Galactic Center

Resolved Millisecond Pulsars are Consistent with the Galactic Center Excess (Invited Talk)

2018 ◽  
Author(s):  
Chris Gordon ◽  
Harrison Ploeg ◽  
Roland Crocker ◽  
Oscar Macias
Keyword(s):  
Galactic Center ◽  
Millisecond Pulsars

Kinematical Structure of the Local Interstellar Medium: The Galactic Center Hemisphere

1997 ◽  
Vol 484 (2) ◽  
pp. 761-778 ◽  
Author(s):  
Ricardo Genova ◽  
John E. Beckman ◽  
Stuart Bowyer ◽  
Thomas Spicer
Keyword(s):  
Interstellar Medium ◽  
Galactic Center ◽  
Local Interstellar Medium
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