An Empirical Correlation of $T_{\max }$ - $M_{\mathrm{WD}}$ of Dwarf Novae and The Average White Dwarf Mass in Cataclysmic Variables in the Galactic Bulge

Abstract

The mean white dwarf (WD) mass in the Galactic bulge cataclysmic variables (CVs) was measured by applying the the shock temperature-WD mass correlation of magnetic cataclysmic variables (mCVs) to the Galactic Bulge X-ray Emission (GBXE) spectra. However, the resulting mean WD mass is lower than that of the local CVs. This discrepancy could be explained by the dominating sources in the GBXE are non-mCVs instead of mCVs. In this work, we conduct an thorough investigation on the X-ray spectra of local DNe from \suzaku\ archives, and derive semi-empirical correlations between the shock temperature $T_{\max }$, the flux ratio of \fec\ to \feb\ lines, and WD mass for quiescent, non-magnetic CVs. By applying these correlations to the GBXE, we derive the average WD mass of CVs in the Galactic bulge to be $0.81\pm 0.07M_{\odot }$. This value is consistent with previous optical measurements of WD mass in local CVs.

arXiv comment11 pages, 4 figures, accepted for publication in The Astrophysical Journal

References in corpus (34)

• Catalogue of cataclysmic binaries, low-mass X-ray binaries and related objects (Seventh edition)
• Hard X-ray Detector (HXD) on Board Suzaku
• An Extended Grid of Nova Models: II. The Parameter Space of Nova Outbursts
• Post-common-envelope binaries from SDSS. XI: The white dwarf mass distributions of CVs and pre-CVs
• Discrete sources as the origin of the Galactic X-ray ridge emission
• The True Incidence of Magnetism among Field White Dwarfs
• X-ray luminosity function of faint point sources in the Milky Way
• Two Types of X-ray Spectra in Cataclysmic Variables
• Hard X-ray emission from the Galactic ridge
• RXTE broadband X-ray spectra of intermediate polars and white dwarf mass estimates
• INTEGRAL hard X-ray spectra of the cosmic X-ray background and Galactic ridge emission
• White dwarf masses in intermediate polars observed with the Suzaku satellite
• Deriving an X-ray luminosity function of dwarf novae based on parallax measurements
• Evidence for intermediate polars as the origin of the Galactic Center hard X-ray emission
• Broad-band spectral analysis of the Galactic Ridge X-ray Emission
• The space density of magnetic cataclysmic variables
• Fe Line Diagnostics of Cataclysmic Variables and Galactic Ridge X-ray Emission
• The Masses and Evolutionary State of the Stars in the Dwarf Nova SS Cygni
• The accreting white dwarfs in BW Scl, BC UMa and SW UMa
• Spatial distribution and galactic model parameters of cataclysmic variables
• The stellar mass ratio of GK Persei
• Roche tomography of cataclysmic variables - IV. Starspots and slingshot prominences on BV Cen
• Origin of the Galactic Diffuse X-ray Emission: Iron K-shell Line Diagnostics
• HST Fine Guidance Sensor Parallaxes for Four Classical Novae
• Hubble Space Telescope STIS Spectroscopy of Long Period Dwarf Novae in Quiescence
• Discovery of a Significant Magnetic CV Population in the Limiting Window
• Infrared Spectroscopic Observations of the Secondary Stars of Short Period Sub-Gap Cataclysmic Variables
• Low-luminosity X-ray sources and the Galactic ridge X-ray emission
• A Systematic X-ray Study of the Dwarf Novae Observed with Suzaku
• High spectral resolution time-resolved optical spectroscopy of V893 Sco
• Distances of CVs and related objects derived from Gaia Data Release 1
• BF Eridani: a cataclysmic variable with a massive white dwarf and an evolved secondary
• Galactic model parameters of cataclysmic variables: Results from a new absolute magnitude calibration with 2MASS and WISE
• On the White Dwarf Mass Problem of Cataclysmic Variables

Cited by in corpus (7)

• The Fe Line Flux Ratio as a diagnostic of the maximum temperature and the white dwarf mass of Cataclysmic Variables
• Massive White Dwarfs in the Galactic Center: A Chandra X-ray Spectroscopy of Cataclysmic Variables
• Classifying IGR J18007-4146 as an intermediate polar using XMM and NuSTAR
• A Time-Dependent Spectral Analysis of $\gamma$ Cassiopeiae
• V1082-Sgr: A magnetic cataclysmic variable with a lobe-filling companion star
• An X-ray and Optical Study of the Dwarf Nova Candidate OGLE-BLG-DN-0064
• Multiwavelength Characterization of a New Magnetic Cataclysmic Variable 2CXO J050740.7-091337