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Local distribution of old neutron starsThe local distribution of old disk neutron stars is approximated with a 1D model, in which the steady state distribution in the direction perpendicular to the Galactic plane is calculated, assuming a variety of the initial radio pulsar positions and velocities, and various Galactic potentials. It is found that the local distribution of old neutron stars is dominated by those that were born with very low velocities. The high-velocity neutron stars spend most of their lifetime far in the Galactic halo and do not contribute much to the local density. Therefore, the rms velocity at birth is not a good indicator of the scale height of the old population. The most likely half-density scale height for the old disk neutron stars is approximately 350 pc, the same as for the old disk G, K, and M stars. If gamma-ray bursts originate on old disk neutron stars, then 350 pc should also be the scale height for the bursters.
Document ID
19920036687
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Frei, Szolt
(Princeton Univ. Observatory NJ, United States)
Huang, Xiaolan
(Princeton Univ. Observatory NJ, United States)
Paczynski, Bohdan
(Princeton University Observatory, NJ, United States)
Date Acquired
August 15, 2013
Publication Date
January 1, 1992
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 384
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
92A19311
Funding Number(s)
CONTRACT_GRANT: NSF AST-87-18432
CONTRACT_GRANT: NAGW-2448
CONTRACT_GRANT: NAGW-765
CONTRACT_GRANT: NSF AST-90-23775
Distribution Limits
Public
Copyright
Other

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