2004MNRAS.350.1373R

Query : 2004MNRAS.350.1373R

2004MNRAS.350.1373R - Mon. Not. R. Astron. Soc., 350, 1373-1384 (2004/June-1)

XMM-Newton observations of polars in low accretion states.

RAMSAY G., CROPPER M., WU K., MASON K.O., CORDOVA F.A. and PRIEDHORSKY W.

Abstract (from CDS):

We have made a series of snap-shot observations of 37 polars using XMM-Newton. We found that 16 of these systems were in a low, or much reduced, accretion state. Of those, six were not detected in X-rays. This suggests that in any survey of polars, around half will be in a low accretion state. We tested if there was a bias towards certain orbital periods: this is not the case. Of the 10 systems that were detected at low but significant rates in X-rays, eight showed significant variability in their X-ray light curves. This implies that non-uniform accretion still takes place during low accretion epochs. The bolometric luminosity of these systems is ∼1030 erg/s, two orders of magnitude less than for systems in a high accretion state. The X-ray spectra show no evidence of a distinct soft X-ray component. However, the X-ray and UV data imply that such a low-temperature component exists: its temperature is low enough for its flux distribution to move outside the bandpass of the X-ray instruments.

Abstract Copyright: 2004 RAS

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

Simbad objects: 47

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Number of rows : 47
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* CV Hyi CV* 01 32 42.0237133838 -65 54 32.215873874           ~ 25 0
2 V* BL Hyi CV* 01 41 00.3996430344 -67 53 27.470100660       15.340   DC: 221 0
3 RX J0154.0-5947 CV* 01 54 00.9316590192 -59 47 49.095380292         16.03 ~ 22 0
4 V* WW Hor CV* 02 36 11.4433563560 -52 19 13.934884433           ~ 81 0
5 V* EF Eri CV* 03 14 13.2526234800 -22 35 42.900077688   15.4 14.53 13.5   DA 453 0
6 V* VY For CV* 03 32 04.6053469152 -25 56 55.063844916   17.5       M4.5V: 38 0
7 V* UZ For CV* 03 35 28.6518733656 -25 44 21.768755424           M4.5 279 0
8 RX J0425.6-5714 CV* 04 25 38.6074878432 -57 14 36.208598640   19.1       ~ 15 0
9 V* RS Cae CV* 04 53 25.5511419734 -42 13 39.629891111           Am 38 0
10 V* HY Eri CV* 05 01 46.4033893080 -03 59 20.542022844           ~ 28 0
11 V* UW Pic CV* 05 31 35.6477519256 -46 24 04.962759156           ~ 53 0
12 V* BY Cam CV* 05 42 48.8013535344 +60 51 31.376128608   16.60       ~ 270 0
13 V* VV Pup CV* 08 15 06.8009599464 -19 03 17.765706024     13.90     M7V 413 0
14 V* EU Cnc CV* 08 51 27.1835851536 +11 46 56.996141700   21.93 21.75     ~ 46 0
15 HS 0922+1333 RS* 09 24 55.9281822011 +13 20 52.187007940     16.42     ~ 33 0
16 V* MN Hya CV* 09 29 07.0308334337 -24 05 05.423730671           ~ 44 0
17 RE J1002-19 CV* 10 02 11.7329470968 -19 25 37.271181864           ~ 27 0
18 RX J1007.5-2017 CV* 10 07 34.6526107392 -20 17 32.451317412     18.0     ~ 33 0
19 V* GG Leo CV* 10 15 34.6774861296 +09 04 41.988487224           ~ 57 0
20 V* WX LMi CV* 10 26 27.4933431861 +38 45 02.655728034   18   16.77   M5.0 56 0
21 V* FH UMa CV* 10 47 09.88 +63 35 13.6   19.4       ~ 25 0
22 V* EK UMa CV* 10 51 35.1578195280 +54 04 36.112715220           ~ 89 1
23 V* AN UMa CV* 11 04 25.6556168328 +45 03 13.940184528     14.90     ~ 261 0
24 V* ST LMi CV* 11 05 39.7664319408 +25 06 28.746723096   16.832 16.524 15.639   DAH+M 228 0
25 V* AR UMa CV* 11 15 44.5891034908 +42 58 22.431026739     16.4     O9I 154 0
26 V* DP Leo CV* 11 17 15.9239894616 +17 57 41.690453220           ~ 237 1
27 V* V1033 Cen CV* 11 41 22.7355288051 -64 10 14.359536576           ~ 22 0
28 V* EU UMa CV* 11 49 55.7017863576 +28 45 07.294697604   15.4       DB+K 83 1
29 V* EV UMa CV* 13 07 53.8583243765 +53 51 30.498937628           ~ 71 0
30 RE J1313-32 CV* 13 13 -32.0           ~ 5 0
31 V* V1043 Cen CV* 13 13 17.1147127536 -32 59 12.443490960           ~ 43 0
32 V* V834 Cen CV* 14 09 07.2863511816 -45 17 16.023776676       15.301   M6.5 333 0
33 V* V895 Cen CV* 14 29 27.1971552971 -38 04 09.579261731           ~ 43 0
34 PG 1550+191 CV* 15 52 47.1968971224 +18 56 28.844471472   16.4 15.46 17.0   M6.5Ve 202 0
35 V* V2301 Oph CV* 18 00 35.5317201576 +08 10 13.920836628           ~ 107 0
36 V* AM Her CV* 18 16 13.2546725104 +49 52 04.759613537   15.124 14.808 13.525   M4.5-5Ve 1009 2
37 V* V347 Pav CV* 18 44 48.2632656840 -74 18 34.216501464           ~ 63 0
38 V* MT Dra RS* 18 46 58.7968849152 +55 38 28.771274508   20.4   19.4   ~ 27 0
39 V* EP Dra CV* 19 07 06.1869434379 +69 08 43.874477499   18       ~ 69 0
40 V* V393 Pav CV* 19 57 11.5514523936 -57 38 22.427884104           ~ 30 0
41 V* QQ Vul CV* 20 05 41.9090048400 +22 39 58.839854760   14.688 14.656 14.584   M2 205 0
42 V* V349 Pav CV* 20 08 55.8722388744 -65 27 43.498283364           ~ 22 0
43 V* V4738 Sgr CV* 20 22 37.5223551336 -39 54 12.456114660           ~ 24 0
44 V* V1500 Cyg No* 21 11 36.5809818696 +48 09 01.952490204           ~ 820 0
45 V* CD Ind CV* 21 15 41.0450813472 -58 40 54.058462428           ~ 108 0
46 V* CE Gru CV* 21 37 56.4215712451 -43 42 13.799027618           ~ 35 0
47 V* CP Tuc CV* 23 15 19.0034090472 -59 10 29.129147076           DA 45 0

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