2021JAVSO..49..149M


Query : 2021JAVSO..49..149M

2021JAVSO..49..149M - J. Am. Assoc. Variable star obs., 49, 149 (2021)

An Analysis of X-Ray Hardness Ratios between Asynchronous and Non-Asynchronous Polars.

MASINGTON E., MACCARONE T.J., RIVERA SANDOVAL L., HEINKE C., BAHRAMIAN A. and SHAW A.W.

Abstract (from CDS):

The subclass of magnetic Cataclysmic Variables (CV) known as asynchronous polars is still relatively poorly understood. An asynchronous polar is a polar in which the spin period of the white dwarf is either shorter or longer than the binary orbital period (typically within a few percent). The asynchronous polars have been disproportionately detected in soft gamma-ray observations, leading us to consider the possibility that they have intrinsically harder x-ray spectra. We compared standard and asynchronous polars in order to examine the relationship between a CV's synchronization status and its spectral shape. Using the entire sample of asynchronous polars, we find that the asynchronous polars may, indeed, have harder spectra, but that the result is not statistically significant.

Abstract Copyright: ∼

Journal keyword(s):

Status at CDS : Objects in title, abstract, text, figures, and all or part of small table(s) being processed in SIMBAD.

Simbad objects: 11

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Number of rows : 11
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* IW Eri CV* 04 25 55.1916981840 -19 45 30.489689160           ~ 29 0
2 V* BY Cam CV* 05 42 48.8013535344 +60 51 31.376128608   16.60       ~ 270 0
3 RX J0838.7-2827 CV* 08 38 43.3520551272 -28 27 01.143230076           ~ 23 0
4 V* V834 Cen CV* 14 09 07.2863511816 -45 17 16.023776676       15.301   M6.5 333 0
5 V* V2301 Oph CV* 18 00 35.5317201576 +08 10 13.920836628           ~ 107 0
6 V* AM Her CV* 18 16 13.2546725104 +49 52 04.759613537   15.124 14.808 13.525   M4.5-5Ve 1009 2
7 V* V1432 Aql CV* 19 40 11.4199326288 -10 25 25.771706256     14.40 15.437   ~ 181 0
8 2MASS J19551247+0045365 CV* 19 55 12.4799164872 +00 45 36.864000540   15.6 16 16.0   ~ 41 0
9 V* V1500 Cyg No* 21 11 36.5809818696 +48 09 01.952490204           ~ 820 0
10 V* CD Ind CV* 21 15 41.0450813472 -58 40 54.058462428           ~ 108 0
11 ATO J349.8768+26.2551 CV* 23 19 30.4330759032 +26 15 18.724769712   19.6   19.6   ~ 27 0

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