2010AJ....140.1433B

Query : 2010AJ....140.1433B

2010AJ....140.1433B - Astron. J., 140, 1433-1443 (2010/November-0)

Hard X-ray emission associated with white dwarfs. III.

BILIKOVA J., CHU Y.-H., GRUENDL R.A. and MADDOX L.A.

Abstract (from CDS):

Hard X-ray emission associated with white dwarfs (WDs) can be used to diagnose the presence of late-type binary companions, mass accretion from companions, or physical processes with unknown origins. Since our previous systematic searches for hard X-ray emission associated with WDs, the Galactic WD catalog has been augmented by >10,000 new WDs from the Sloan Digital Sky Survey and new X-ray point-source catalogs from XMM-Newton and ROSAT have become available. Therefore, we have extended the search using the updated catalogs, and found 17 new cases of WDs associated with hard X-ray emission. The 32 WDs associated with hard X-ray emission, from the current and previous searches, can be divided into five categories: (1) binary WD with a coronal companion, (2) binary WD with mass transfer from a companion, (3) single hot WD with a hard X-ray component peaking near 1 keV in addition to a soft photospheric component, (4) two PG 1159 stars with very faint X-ray emission in the 0.9-2.0 keV band, and (5) two DA WDs whose photospheric emission component has a hard shoulder extending to 0.5-0.9 keV. The origin of the hard X-ray emission in the latter three categories is not yet known. Deeper X-ray observations with higher angular and spectral resolutions are needed to help us understand these WDs' hard X-ray emission.

Abstract Copyright: ∼

Journal keyword(s): binaries: general - stars: coronae - stars: late-type - white dwarfs - X-rays: general

Simbad objects: 51

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Number of rows : 51
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 KPD 0005+5106 WD* 00 08 18.1703149584 +51 23 16.598370912 11.80 13.04 13.32 13.53   DOZ1 126 0
2 ACO S 84 ClG 00 49 23.2 -29 31 33           ~ 89 0
3 FOCAP SGP2:31 WD* 00 51 11.2877279040 -29 09 39.731693868   18.99 18.9     DA3.5 12 0
4 RX J0122.9-7521 WD* 01 22 53.4122561952 -75 21 14.724358308     15.4     PG1159 47 0
5 * omi Cet Mi* 02 19 20.79210 -02 58 39.4956   7.63 6.53 5.03   M5-9IIIe+DA 1586 0
6 * omi Cet B WD* 02 19 20.80 -02 58 40.0           DA 52 1
7 EGGR 18 WD* 02 23 36.0793120872 +22 27 29.051674848   15.90 15.83 15.46   DA3.1 49 0
8 V* FS Cet CV* 02 35 07.5939240480 +03 43 56.816311296 11.027 12.209 12.412 12.325 11.968 DA1+dM 379 0
9 FOCAP QSF1:02 WD* 03 41 26.7257844120 -45 00 49.336832628   19.6   21.1   DA 8 0
10 V* V471 Tau SB* 03 50 24.9666549840 +17 14 47.430910716   10.258 9.373   8.393 K2V+DA 697 0
11 * omi02 Eri B WD* 04 15 21.7957181469 -07 39 29.203986789 9.147 9.83 9.53     DA2.9 357 0
12 HD 27483 ** 04 20 52.7204196432 +13 51 51.933419460   6.603 6.141 5.876 5.630 DA3+F6V 196 0
13 V* RR Cae WD* 04 21 05.5631820426 -48 39 07.061113433 14.50 14.92 14.40     DA7.8 168 1
14 HZ 9 ** 04 32 23.7569977200 +17 45 02.672275356   14.28 13.93 14.21   DA3+dM 160 0
15 RX J0458.9-6628 ** 04 58 53.9437236048 -66 28 13.311306372           DA+M2:Ve 11 0
16 * 14 Aur B XB* 05 15 23.6000866920 +32 41 05.232329700   8.25 7.88     F2V+DA1.3 85 1
17 GH 7-23 G 05 15 35 -65 11.9     15.3     ~ 2 0
18 * alf CMi B WD* 07 39 17.8800 +05 13 26.800   10.7 10.92     DQZ 174 0
19 Cl* NGC 2632 KW 195 * 08 39 35.7431147160 +19 30 42.713540892   13.4       ~ 8 0
20 LB 5893 WD* 08 39 36.4894448736 +19 30 43.660631664 16.70 17.57 17.63   18.00 DA2.5 56 0
21 NGC 2632 OpC 08 39 58.4 +19 36 33           ~ 1733 0
22 * G Car SB* 09 05 08.8131197868 -72 36 09.729210524   5.069 4.467     F8II+DA 79 0
23 HD 81817 SB* 09 37 05.2877790 +81 19 34.971143   5.736 4.255     K3II-III 109 0
24 V* UZ Sex ** 10 28 34.8776549016 -00 00 29.394837900   13.89   13.9   DA3+dM 85 0
25 GD 140 WD* 11 37 05.1041466528 +29 47 58.288741080 11.47 12.42 12.45 12.73 12.714 DA2.2 257 0
26 V* GW Vir WD* 12 01 45.9731868264 -03 45 40.628670300   14.87 15.04     DOQZ1 505 0
27 V* EG UMa CV* 12 15 44.0979312096 +52 31 01.289011692   13.0 13.230 13.149   DA+dM 119 1
28 PG 1234+482 WD* 12 36 45.1436139768 +47 55 22.218366900     14.38     DA.9 98 2
29 PN LoTr 5 PN 12 55 33.7471108416 +25 53 30.559286040   9.72 8.88     G5III-IV 223 0
30 GD 153 WD* 12 57 02.3224909560 +22 01 52.634778240 11.883 13.060 13.349 13.488 13.669 DA1.2 380 0
31 V* V396 Hya CV* 13 12 46.4399548464 -23 21 32.595789924   18.9   17.5   DD 114 0
32 HZ 43A WD* 13 16 21.8532409720 +29 05 55.411186877   12.52 12.66     DAwk 477 0
33 PG 1333+511 WD* 13 35 14.5342852344 +50 50 12.255625896   16.39       DA1.4 29 0
34 LBQS 1337-0004 WD* 13 39 47.7428500464 -00 20 03.474206556   18.35       DA6.5 26 0
35 V* QS Vir SB* 13 49 52.0029035208 -13 13 37.000132212 14.27 14.98 14.40 14.37   DA3+dM 147 1
36 PB 1281 WD* 14 03 54.0144922296 +43 34 55.123725828   17       DA 21 0
37 PG 1449+168 WD* 14 52 11.3895215040 +16 38 03.674475492   15.6 15.39 15.5   DA2.2 35 0
38 ACO 1983 ClG 14 52 59.33 +16 46 11.0           ~ 249 1
39 LAWD 59 WD* 15 45 10.9360242504 -38 18 51.617130048   16.5 14.6 14.3   DA2.7 14 1
40 RX J1629.0+7804 WD* 16 29 10.278576 +78 04 39.91620   12.74 12.95 13.03   DA1.2 86 0
41 EGGR 258 WD* 16 34 21.5518633862 +57 10 08.868180953       14.770   DQ8 132 0
42 HD 149499B WD* 16 38 31.199462 -57 28 10.70103   11.15 11.28     DOZ1 108 0
43 * 29 Dra RS* 17 32 41.2152041592 +74 13 38.490729348   7.691 6.627     K0+DA1.5 167 0
44 HD 165141 RS* 18 07 00.2466690936 -48 14 50.204205744   8.10 7.10     K0II/IIIBa1+DA: 71 0
45 PN K 1-16 PN 18 21 52.1086837968 +64 21 53.406292104   14.44 14.96 15.26   PG1159 258 0
46 CD-42 14462 CV* 19 47 40.5290567472 -42 00 26.395115580 9.65 10.362 10.308 10.520   sdB 243 0
47 RX J2130.6+4710 XB* 21 30 18.4670033976 +47 10 07.403693592           DA+M3.5/4Ve 32 0
48 EGGR 150 WD* 21 52 25.3789636654 +02 23 19.576176425 11.942 12.732 12.743 12.839 12.938 DA2.8 213 0
49 WG 39 WD* 21 57 38.3567715267 -51 00 31.521044535   14.94 14.73 14.53   DQ7 87 0
50 NGC 7293 PN 22 29 38.5454047152 -20 50 13.747242408 11.894 13.158 13.524 13.689 13.898 DAO.5 983 1
51 V* ZZ Psc WD* 23 28 47.6365087803 +05 14 54.235051503   13.217   13.106   DA4.1 536 0

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