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Eclipse mechanisms for binary pulsars

Rasio, F. A. and Shapiro, S. L. and Teukolsky, S. A. (1991) Eclipse mechanisms for binary pulsars. Astronomy and Astrophysics, 241 (1). L25-L28. ISSN 0004-6361.

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The parameters of the new eclipsing millisecond pulsar PSR 1744 - 24A in Terzan 5 are sufficiently different from those of PSR 1957 + 20 that very severe constraints can be put now on the theoretical models and formation scenarios of such systems. Most importantly, the eclipse cannot be caused by refractive effects (either total reflection or bending of the radio signal paths). Instead, they very likely are produced by an absorption mechanism, possibly combined with pulse-smearing effects. A model based on free-free absorption by the gas evaporated from the companion remains viable in spite of difficulties. Independent of the particular eclipse mechanism, the results of some preliminary dynamical calculations of the evaporative flow are discussed.

Item Type:Article
Related URLs:
URLURL TypeDescription
Rasio, F. A.0000-0002-7132-418X
Teukolsky, S. A.0000-0001-9765-4526
Additional Information:© 1991 European Southern Observatory. Provided by the NASA Astrophysics Data System. Received September 20, accepted October 10, 1990. We thank A. Fruchter, A. Lyne and R. Manchester for discussing observations in progress, and M. Blaskiewicz, D. Chernoff, J. Cordes, J. Shaham and I. Wasserman for valuable conversations. This research was supported in part by NSF grants AST 87-14475 and PHY 9007834 to Cornell University.
Funding AgencyGrant Number
NSFAST 87-14475
Subject Keywords:pulsars - stars: binaries
Issue or Number:1
Record Number:CaltechAUTHORS:20180801-104055676
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:88438
Deposited By: Tony Diaz
Deposited On:01 Aug 2018 18:19
Last Modified:09 Mar 2020 13:19

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