The Green Bank Northern Celestial Cap Pulsar Survey. II. the Discovery and Timing of 10 Pulsars

Authors

A. M. Kawash
M. A. McLaughlin
Louis Percy Dartez, The University of Texas Rio Grande Valley
David Day, The University of Texas Rio Grande Valley
Anthony J. Ford, The University of Texas Rio Grande Valley
Jesus Hinojosa, The University of Texas Rio Grande Valley
Fredrick A. Jenet, The University of Texas Rio Grande Valley
Sean Leake, The University of Texas Rio Grande Valley
Grady Lunsford, The University of Texas Rio Grande Valley
Alberto Mata, The University of Texas Rio Grande Valley

Document Type

Article

Publication Date

4-20-2018

Abstract

We present timing solutions for 10 pulsars discovered in 350 MHz searches with the Green Bank Telescope. Nine of these were discovered in the Green Bank Northern Celestial Cap survey and one was discovered by students in the Pulsar Search Collaboratory program during an analysis of drift-scan data. Following the discovery and confirmation with the Green Bank Telescope, timing has yielded phase-connected solutions with high-precision measurements of rotational and astrometric parameters. Eight of the pulsars are slow and isolated, including PSR J0930-2301, a pulsar with a nulling fraction lower limit of ∼30% and a nulling timescale of seconds to minutes. This pulsar also shows evidence of mode changing. The remaining two pulsars have undergone recycling, accreting material from binary companions, resulting in higher spin frequencies. PSR J0557-2948 is an isolated, 44 ms pulsar that has been partially recycled and is likely a former member of a binary system that was disrupted by a second supernova. The paucity of such so-called \"disrupted binary pulsars\" (DRPs) compared to double neutron star (DNS) binaries can be used to test current evolutionary scenarios, especially the kicks imparted on the neutron stars in the second supernova. There is some evidence that DRPs have larger space velocities, which could explain their small numbers. PSR J1806+2819 is a 15 ms pulsar in a 44-day orbit with a low-mass white dwarf companion. We did not detect the companion in archival optical data, indicating that it must be older than 1200 Myr.

Comments

© 2018, Institute of Physics Publishing. Original published version available at https://doi.org/10.3847/1538-4357/aab61d

Recommended Citation

Kawash, A. M., M. A. McLaughlin, D. L. Kaplan, M. E. DeCesar, L. Levin, D. R. Lorimer, R. S. Lynch et al. "The green bank northern celestial cap pulsar survey. II. The discovery and timing of 10 pulsars." The Astrophysical Journal 857, no. 2 (2018): 131. https://doi.org/10.3847/1538-4357/aab61d

Publication Title

American Astronomical Society

DOI

https://doi.org/10.3847/1538-4357/aab61d