2013MNRAS.430.1994R

Query : 2013MNRAS.430.1994R

2013MNRAS.430.1994R - Mon. Not. R. Astron. Soc., 430, 1994-2001 (2013/April-2)

X-ray luminosities of optically selected cataclysmic variables and application to the Galactic ridge X-ray emission.

REIS R.C., WHEATLEY P.J., GANSICKE B.T. and OSBORNE J.P.

Abstract (from CDS):

By studying Swift X-ray spectra of an optically selected, non-magnetic sample of nearby cataclysmic variables (CVs), we show that there is a population with X-ray luminosity much lower than accounted for in existing studies. We find an average 0.5-10.0keV luminosity of 8×10^29 erg  s^-1 which is an order of magnitude lower than observed in previous samples. Looking at the co-added X-ray spectrum of 20 CVs, we show that the spectral properties of this optically selected, low X-ray luminosity sample - likely characteristic of the dominant population of CVs - resemble that of their brighter counterpart, as well as the X-ray emission originating in the Galactic ridge. It is argued that if the space density of CVs is greater than the current estimates, as it is indeed predicted by population synthesis models, then CVs can significantly contribute to the Galactic ridge emission.

Abstract Copyright: © 2013 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2013)

Journal keyword(s): stars: luminosity function, mass function - novae, cataclysmic variables - stars: white dwarf - X-rays: binaries

CDS comments: p.1996, SDSS 1337+0148 and SDSS 1339+4842 are probable misprints for SDSS 1339+4847. In Table 1, SDSS 1339+4847 is most likely SDSS J133941.12+484727.5.

Simbad objects: 23

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Number of rows : 23
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* FL Psc CV* 00 25 11.1124543656 +12 17 12.384853512   16.6 16.78     DC 65 0
2 V* GY Cet CV* 01 31 32.3907990576 -09 01 22.326479976   18.61 18.54     DC: 31 0
3 V* GZ Cet CV* 01 37 01.0693101024 -09 12 34.719127956     18.52     ~ 42 0
4 V* PQ And CV* 02 29 29.5680196128 +40 02 39.811816104           DA: 50 0
5 V* EG Cnc CV* 08 43 03.9863206560 +27 51 49.693595508           DAe 195 0
6 GALEX J090403.5+035501 CV* 09 04 03.4818393575 +03 55 01.259832143   18.7   19.0   ~ 22 0
7 V* FV Lyn CV* 09 04 52.0979419968 +44 02 55.472600220   19.5       ~ 14 0
8 V* LV Cnc CV* 09 19 45.1192368384 +08 57 10.100184120     17.7     DC: 27 0
9 V* RZ Leo CV* 11 37 22.2524330304 +01 48 58.617459936     19.6     DA+dM2 170 0
10 V* V406 Vir CV* 12 38 13.7337832872 -03 39 32.965818228           DA3e 62 0
11 V* MT Com CV* 12 55 10.5637132704 +26 42 26.595387504           ~ 42 0
12 V* V355 UMa CV* 13 39 41.1389765496 +48 47 27.466647216   17.2 18.01 17.3   DC: 58 1
13 SDSS J145758.21+514807.9 CV* 14 57 58.2259229184 +51 48 07.851372984   18.8   19.4   D 20 0
14 SDSS J150137.22+550123.4 CV* 15 01 37.2173710728 +55 01 23.280739320   18.2   18.8   DA: 35 0
15 V* OV Boo CV* 15 07 22.3698571080 +52 30 39.804859764   18.7   18.5   DAe 82 0
16 V* GW Lib No* 15 19 55.3333785336 -25 00 24.614534520           DA: 228 0
17 V* V493 Ser CV* 15 56 44.2350520968 -00 09 50.222876328           ~ 34 0
18 V* V386 Ser CV* 16 10 33.6304596192 -01 02 23.216047440           DA: 47 0
19 V* V1239 Her CV* 17 02 13.2462561912 +32 29 54.159948960           M1.5e 60 0
20 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
21 SDSS J204817.85-061044.8 CV* 20 48 17.8483614432 -06 10 44.748728040           ~ 20 0
22 V* V455 And CV* 23 34 01.4484962496 +39 21 40.866079356   16.220 16.094 16.137   DQ 166 0
23 NAME Galactic Ridge ? ~ ~           ~ 543 1

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