2019ApJ...878...53X

Query : 2019ApJ...878...53X

2019ApJ...878...53X - Astrophys. J., 878, 53-53 (2019/June-2)

The Fe line flux ratio as a diagnostic of the maximum temperature and the white dwarf mass of cataclysmic variables.

XU X.-J., YU Z.-L. and LI X.-D.

Abstract (from CDS):

The flux ratio of Fe XXVI-Lyα to Fe XXV-Heα lines (I7.0/I6.7) is a sensitive indicator of the maximum temperature (Tmax), and therefore the mass of white dwarf stars (MWD) in cataclysmic variables (CVs). To examine and calibrate the theoretical I7.0/I6.7-Tmax-MWD relations, reliable measurements of Tmax and I7.0/I6.7 are necessary. In this work, we conduct a thorough investigation of 3-50 keV X-ray spectra of 25 solar neighborhood magnetic and nonmagnetic CVs based on archival NuSTAR and Suzaku observations. The measured Tmax are compared to the I7.0/I6.7 and MWD. The results show that the sampled CVs closely follow the theoretical I7.0/I6.7-Tmax relation. Moreover, all the MWD estimated from I7.0/I6.7 are consistent with the dynamically measured ones. We conclude that I7.0/I6.7 can be used as a good diagnostic for Tmax and MWD in both magnetic and nonmagnetic CVs.

Abstract Copyright: © 2019. The American Astronomical Society.

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

Simbad objects: 28

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Number of rows : 28
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* V709 Cas CV* 00 28 48.8267393856 +59 17 22.033767228     14.01     ~ 127 0
2 V* XY Ari CV* 02 56 08.19048 +19 26 34.1844           ~ 157 1
3 V* VW Hyi CV* 04 09 11.3967378648 -71 17 41.554528260   12.786 12.543 14.160   ?+L0:e 646 0
4 V* V1159 Ori CV* 05 28 59.5676204544 -03 33 52.282939068   14.321 14.203 15.317   ~ 144 0
5 V* TV Col CV* 05 29 25.5292422792 -32 49 03.900212364   14.219 13.846 14.181   K2V 338 0
6 V* TX Col CV* 05 43 20.16864 -41 01 54.2856         14.541 ~ 158 0
7 V* SS Aur CV* 06 13 22.4340408984 +47 44 25.345431780   16.06 15.81     sdBe 261 0
8 V* MU Cam XB* 06 25 16.2519466536 +73 34 39.105603804       14.3   ~ 70 0
9 V* BG CMi CV* 07 31 29.0079060264 +09 56 23.030740248   14.5       ~ 228 0
10 V* PQ Gem CV* 07 51 17.3280306912 +14 44 23.874868716   14.415 14.162 13.945   ~ 227 0
11 V* U Gem CV* 07 55 05.2323858391 +22 00 05.045435077   15.3 14.54     DA 1101 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* YY Dra EB* 11 43 35 +71 42.2           ~ 36 1
14 V* EX Hya CV* 12 52 24.2222471899 -29 14 55.999766523   13.51 13.49 13.55   M5-6V 694 0
15 V* BV Cen CV* 13 31 19.5105743208 -54 58 33.657394152     13.151 12.746 12.226 G5-8IV/V 189 0
16 V* EK TrA CV* 15 14 01.3761801610 -65 05 32.305864520           ~ 126 0
17 V* NY Lup XB* 15 48 14.5961462732 -45 28 39.918849218       14.544   K0/3Ve 102 0
18 V* V893 Sco CV* 16 15 14.9804783976 -28 37 32.113386876           ~ 85 0
19 V* V2400 Oph CV* 17 12 36.4233668016 -24 14 44.773987164     14.5     ~ 155 0
20 1RXS J171935.6-410054 CV* 17 19 35.8927822656 -41 00 53.529823332   15.60 15.20 15.33 14.3 ~ 63 0
21 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 14420 0
22 V* V1223 Sgr CV* 18 55 02.3108012664 -31 09 49.584656268           ~ 333 0
23 RX J2133.7+5107 CV* 21 33 43.6348450728 +51 07 24.729535560   15.80       ~ 79 0
24 V* SS Cyg CV* 21 42 42.8034497592 +43 35 09.867842484 11.07 12.651 12.032 9.326   K5V 1290 1
25 V* FO Aqr CV* 22 17 55.3796835600 -08 21 03.754995948           ~ 362 0
26 V* AO Psc CV* 22 55 17.9860863984 -03 10 39.981831564           ~ 310 0
27 NAME Galactic Ridge ? ~ ~           ~ 499 1
28 NAME Galactic Bulge reg ~ ~           ~ 4299 0

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