Please use this identifier to cite or link to this item:
Title: Measuring the masses of Intermediate Polars with NuSTAR: V709 Cas, NY Lup and V1223 Sgr
Authors: Shaw, A W
Heinke, C O
Mukai, K
Sivakoff, G R
Tomsick, J A
Rana, V
Keywords: accretion
accretion discs
cataclysmic variables,
white dwarfs
X-rays: binaries
Issue Date: 1-May-2018
Publisher: Oxford University Press on behalf of the Royal Astronomical Society
Citation: Monthly Notices of the Royal Astronomical Society, 2018, Vol. 476; p554–561
Abstract: The X-ray spectra of intermediate polars can be modelled to give a direct measurement of white dwarf mass. Here, we fit accretion column models to NuSTAR spectra of three intermediate polars; V709 Cas, NY Lup, and V1223 Sgr in order to determine their masses. From fits to 3–78 keV spectra, we find masses of MWD=0.88+0.05−0.04M⊙, MWD=0.88−0.04+0.05M⊙, 1.16+0.04−0.02M⊙,1.16−0.02+0.04M⊙, and 0.75 ± 0.02 M⊙ for V709 Cas, NY Lup, and V1223 Sgr, respectively. Our measurements are generally in agreement with those determined by previous surveys of intermediate polars, but with typically a factor ∼2 smaller uncertainties. This work paves the way for an approved NuSTAR Legacy Survey of white dwarf masses in intermediate polars.
Description: Restricted Access. An open-access version is available at (one of the alternative locations)
ISSN: 0035-8711
1365-2966 - (online)
Alternative Location:
Copyright: 2018, The Authours & Oxford University Press
Appears in Collections:Research Papers (A&A)

Files in This Item:
File SizeFormat 
2018_MNRAS_V476_p554-561.pdf1.16 MBAdobe PDFView/Open

Items in RRI Digital Repository are protected by copyright, with all rights reserved, unless otherwise indicated.