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Title:
Discovery of Two Highly Dispersed Pulsars Near Sgr A*
Authors:
Deneva, Julia S.; Cordes, J. M.; Lazio, J.
Affiliation:
AA(Cornell Univ), AB(Cornell Univ), AC(Naval Research Lab)
Publication:
American Astronomical Society, AAS Meeting #213, #436.03; Bulletin of the American Astronomical Society, Vol. 41, p.307
Publication Date:
01/2009
Origin:
AAS
Bibliographic Code:
2009AAS...21343603D

Abstract

We report the discovery of two pulsars 11' from Sgr A* in the same pointing from our 2007 Galactic Center survey with the Green Bank telescope at 2 GHz. J1746-2850I has a period of 1.077 s and dispersion measure of 944 pc/cc and a preliminary timing solution indicates that this may be a young pulsar born with a strong magnetic field 10^13 G. J1746-2850II has a period of 1.478 s and dispersion measure of 1395 pc/cc, which makes it the most highly dispersed pulsar known. The two pulsars provide rare probes into the Galactic center ionized gas environment and their discovery will contribute to improving models of the scattering screen around Sgr A* and the electron number number density in the inner Galaxy.
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