2020ApJ...897...70P

Query : 2020ApJ...897...70P

2020ApJ...897...70P - Astrophys. J., 897, 70-70 (2020/July-1)

The spin-period history of intermediate polars.

PATTERSON J., DE MIGUEL E., KEMP J., DVORAK S., MONARD B., HAMBSCH F.-J., VANMUNSTER T., SKILLMAN D.R., CEJUDO D., CAMPBELL T., ROBERTS G., JONES J., COOK L.M., BOLT G., REA R., ULOWETZ J., KRAJCI T., MENZIES K., LOWTHER S., GOFF W., STEIN W., WOOD M.A., MYERS G., STONE G., UTHAS H., KARAMEHMETOGLU E., SEARGEANT J. and McCORMICK J.

Abstract (from CDS):

We report the detailed history of spin-period changes in five intermediate polars (DQ Herculis, AO Piscium, FO Aquarii, V1223 Sagittarii, and BG Canis Minoris) during the 30-60 yr since their original discovery. Most are slowly spinning up, although there are sometimes years-long episodes of spin-down. This is supportive of the idea that the underlying magnetic white dwarfs are near spin equilibrium. In addition to the ∼40 stars sharing many properties 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.

Abstract Copyright: © 2020. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Cataclysmic variable stars - Classical novae - Close binary stars - DQ Herculis stars - Interacting binary stars - Novae - Stellar accretion - Stellar accretion disks

Simbad objects: 9

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Number of rows : 9
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 V* BG CMi CV* 07 31 29.0079060264 +09 56 23.030740248   14.5       ~ 246 0
2 V* DQ Her CV* 18 07 30.2510391864 +45 51 32.564791872   14.605 14.443 14.800   M3+Ve 1048 1
3 V* V533 Her No* 18 14 20.4844831200 +41 51 22.069747872   15.000 15.032 15.274   ~ 265 0
4 V* V1223 Sgr CV* 18 55 02.3108012664 -31 09 49.584656268           ~ 347 0
5 V* WZ Sge CV* 20 07 36.5037622512 +17 42 14.733254952   15.30 15.20 10.817   D 982 0
6 V* AE Aqr CV* 20 40 09.1598959176 -00 52 15.055595220   12.46 10.40   10.191 K3-5IV/V 705 0
7 V* FO Aqr CV* 22 17 55.3796835600 -08 21 03.754995948   13.533 13.445 13.414   ~ 378 0
8 V* AO Psc CV* 22 55 17.9860863984 -03 10 39.981831564           ~ 327 0
9 V* V455 And CV* 23 34 01.4484962496 +39 21 40.866079356   16.220 16.094 16.137   DQ 166 0

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