RT Journal Article
T1 The Spin-period History of Intermediate Polars
A1 Patterson, Joseph
A1 Miguel Agustino, Enrique de
A1 Kemp, Jonathan
A1 Dvorak, Shawn
AB We report the detailed history of spin-period changes in five intermediate polars (DQ Herculis, AO Piscium, FOAquarii, V1223 Sagittarii, and BG Canis Minoris) during the 30–60 yr since their original discovery. Most areslowly spinning up, although there are sometimes years-long episodes of spin-down. This is supportive of the ideathat the underlying magnetic white dwarfs are near spin equilibrium. In addition to the  40 stars sharing manyproperties and defined by their strong, pulsed X-ray emission, there are a few rotating much faster (P<80 s),whose membership in the class is still in doubt—and who are overdue for closer study.
PB American Astronomical Society
SN 0004-637X
YR 2020
FD 2020-07
LK http://hdl.handle.net/10272/18908
UL http://hdl.handle.net/10272/18908
LA eng
NO Patterson, J., de Miguel Agustino, E., Kemp, J. ... Dvorak, S. (2020). The Spin-period History of Intermediate Polars. The Astrophysical Journal, 897(1), 70. DOI: https://doi.org/10.3847/1538-4357/ab863d
DS Repositorio Institucional de la Universidad de Huelva
RD 31 may 2026