2008MNRAS.386.2167M

Query : 2008MNRAS.386.2167M

2008MNRAS.386.2167M - Mon. Not. R. Astron. Soc., 386, 2167-2172 (2008/June-1)

X-ray polarization signatures of Compton scattering in magnetic cataclysmic variables.

McNAMARA A.L., KUNCIC Z. and WU K.

Abstract (from CDS):

Compton scattering within the accretion column of magnetic cataclysmic variables (mCVs) can induce a net polarization in the X-ray emission. We investigate this process using Monte Carlo simulations and find that significant polarization can arise as a result of the stratified flow structure in the shock-ionized column. We find that the degree of linear polarization can reach levels up to ∼8 per cent for systems with high accretion rates and low white dwarf masses, when viewed at large inclination angles with respect to the accretion column axis. These levels are substantially higher than previously predicted estimates using an accretion column model with uniform density and temperature. We also find that for systems with a relatively low-mass white dwarf accreting at a high accretion rate, the polarization properties may be insensitive to the magnetic field, since most of the scattering occurs at the base of the accretion column where the density structure is determined mainly by bremsstrahlung cooling instead of cyclotron cooling.

Abstract Copyright: © 2008 The Authors. Journal compilation © 2008 RAS

Journal keyword(s): accretion, accretion discs - polarization - scattering - binaries: close - white dwarfs

Simbad objects: 1

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Number of rows : 1
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* GK Per No* 03 31 12.0098863320 +43 54 15.469951212   14.139 13.090 12.589   K1IV 986 0

Query : 2008MNRAS.386.2167M

Basic data :
V* GK Per -- Classical Nova
Other object types: otypes_help 		X (2022MNRAS,1A,...), * (BD,CSI,...), CV* (2013ApJS), V* (AN,V*,...), No* (2017ARep,NOVA), SB* (SBC7,SBC9), Em* (2020A&A,EM*), UV (GALEX,KPD), MIR (WISEA,WISE), PN (PN), PN? (2013MNRAS), NIR (2MASS), Opt (LAMOST)
ICRS coord. (ep=J2000) : 		03 31 12.0098863320 +43 54 15.469951212 (Optical) [ 0.0321 0.0279 90 ] A 2020yCat.1350....0G
FK4 coord. (ep=B1950 eq=1950) : 		03 27 47.5209955174 +43 44 04.599622863 [ 0.0321 0.0279 90 ]
Gal coord. (ep=J2000) : 		150.9559716092627 -10.1041268630992 [ 0.0321 0.0279 90 ]
Proper motions mas/yr : 		-6.878 -17.348 [0.046 0.040 90] A 2020yCat.1350....0G
Radial velocity / Redshift / cz : 		V(km/s) 146.35 [1.64] / z(spectroscopic) 0.000488 [0.000005] / cz 146.39 [1.64]
   (Opt) B 2023ApJS..264...17Z
Parallaxes (mas): 		2.3063 [0.0415] A 2020yCat.1350....0G
Spectral type: 		K1IV C 2002MNRAS.329..597M
Fluxes (10) :
B 14.139 [0.14] D 2012yCat.1322....0Z
V 13.090 [0.15] D 2012yCat.1322....0Z
R 12.589 [0.05] E 2012yCat.1322....0Z
G 12.556587 [0.007161] C 2020yCat.1350....0G
J 10.856 [0.020] C 2003yCat.2246....0C
H 10.267 [0.021] C 2003yCat.2246....0C
K 10.062 [0.022] C 2003yCat.2246....0C
g 13.615 [0.12] D 2012yCat.1322....0Z
r 12.667 [0.16] D 2012yCat.1322....0Z
i 12.198 [0.15] D 2012yCat.1322....0Z
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Identifiers (39) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

NOVA Per 1901 GCRV 54133 PLX 728.00 V* GK Per
1A 0327+43 GCRV 1932 PN G150.9-10.1 WEB 3134
3A 0327+438 HD 21629 1RXS J033111.9+435427 WISEA J033112.00+435415.2
AN 3.1901 HR 1057 SBC7 123 WISE J033111.99+435415.3
BD+43 740a KPD 0327+4343 SBC9 171 [BM83] X0327+437
CSI+43 740 2 LAMOST J033112.00+435415.2 SRGA J033112.4+435416 [KRL2007b] 32
2E 785 2MASS J03311201+4354154 SWIFT J0331.1+4355 AAVSO 0324+43
2E 0327.7+4344 2MAXI J0330+438 SWIFT J0331.2+4354 Gaia DR3 238540495056450048
EM* CDS 368 PBC J0331.1+4353 TIC 431762266 Gaia DR2 238540495056450048
GALEX J033112.0+435415 PLX 728 UCAC4 670-019077

References (986 between 1850 and 2026) (Total 986)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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Collections of Measurements Description of Measurements

Velocities : 6    Distance : 6    Var : 1    Rot : 1    Fe/H : 2    Plx : 4    PM : 2    SpT : 3   

   

Observing logs
ISO : 10    IUE : 63    XMM : 2   

   

External archives :

Archive data at HEASARC - High-Energy Astrophysics Science Archive Research Center

Data at NED - NASA/IPAC Extragalactic Database : V* GK Per

Link by name to the catalogue in VizieR :

BD+43 740a 2E 785 GALEX J033112.0+435415 HD 21629 HR 1057
2MASS J03311201+4354154 PLX 728 PN G150.9-10.1 1RXS J033111.9+435427 UCAC4 670-019077
V* GK Per WISEA J033112.00+435415.2 WISE J033111.99+435415.3 Gaia DR3 238540495056450048 Gaia DR2 238540495056450048

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