2018ApJ...853..182Y

Query : 2018ApJ...853..182Y

2018ApJ...853..182Y - Astrophys. J., 853, 182-182 (2018/February-1)

An empirical correlation of Tmax-MWD of dwarf novae and the average white dwarf mass in cataclysmic variables in the Galactic bulge.

YU Z.-L., XU X.-J., LI X.-D., BAO T., LI Y.-X., XING Y.-C. and SHEN Y.-F.

Abstract (from CDS):

The mean white dwarf (WD) mass in the Galactic bulge cataclysmic variables (CVs) was measured by applying 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, which are non-mCVs instead of mCVs. In this work, we conduct a thorough investigation of the X-ray spectra of local DNe from the Suzaku archives and derive semi-empirical correlations between the shock temperature Tmax, the flux ratio of Fe XXVI-Lyα to Fe XXV-Heα lines, and WD mass for quiescent, nonmagnetic CVs. By applying these correlations to the GBXE, we derive the average WD mass of CVs in the Galactic bulge to be 0.81 ± 0.07M☉. This value is consistent with previous optical measurements of WD mass in local CVs.

Abstract Copyright: © 2018. The American Astronomical Society. All rights reserved.

Journal keyword(s): Galaxy: bulge - novae, cataclysmic variables - X-rays: binaries - X-rays: binaries

Simbad objects: 21

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Number of rows : 21
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 V* FL Psc CV* 00 25 11.1124543656 +12 17 12.384853512   16.6 16.78     ~ 60 0
2 V* KT Per CV* 01 37 08.7946635024 +50 57 20.398380408           M3.5e 126 0
3 V* GK Per No* 03 31 12.0098863320 +43 54 15.469951212   14.139 13.090 12.589   K1IV 936 0
4 V* VW Hyi CV* 04 09 11.3967378648 -71 17 41.554528260   12.786 12.543 14.160   ?+L0:e 648 0
5 V* BF Eri CV* 04 39 29.9447621952 -04 35 58.869385008   15.07 14.58 14.71   D+K3 44 0
6 V* V1159 Ori CV* 05 28 59.5676204544 -03 33 52.282939068   14.321 14.203 15.317   ~ 144 0
7 V* FS Aur CV* 05 47 48.3599178816 +28 35 11.207992848           ~ 114 0
8 V* SS Aur CV* 06 13 22.4340408984 +47 44 25.345431780   16.06 15.81     sdBe 262 0
9 V* U Gem CV* 07 55 05.2323858391 +22 00 05.045435077   15.3 14.54     DA 1101 0
10 V* Z Cam CV* 08 25 13.1986690656 +73 06 39.284964108   12.006 11.927 11.712   ~ 528 0
11 V* SW UMa CV* 08 36 42.7492998204 +53 28 37.976599017           ~ 308 0
12 V* BZ UMa CV* 08 53 44.1735972456 +57 48 40.593710304   15.95 17.58 14.98 15.38 M5.5:Ve 156 0
13 V* CH UMa CV* 10 07 00.7217843640 +67 32 47.506618176   15.97       ~ 110 0
14 V* BV Cen CV* 13 31 19.5105743208 -54 58 33.657394152     13.151 12.746 12.226 G5-8IV/V 189 0
15 V* EK TrA CV* 15 14 01.3761801610 -65 05 32.305864520           ~ 126 0
16 V* V893 Sco CV* 16 15 14.9804783976 -28 37 32.113386876           ~ 86 0
17 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 14494 0
18 V* VY Aqr CV* 21 12 09.2515505688 -08 49 36.779664432           ~ 223 0
19 V* SS Cyg CV* 21 42 42.8034497592 +43 35 09.867842484 11.07 12.651 12.032 9.326   K5V 1292 1
20 NAME Galactic Ridge ? ~ ~           ~ 501 1
21 NAME Galactic Bulge reg ~ ~           ~ 4316 0

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