2020A&A...639A..17W


Query : 2020A&A...639A..17W

2020A&A...639A..17W - Astronomy and Astrophysics, volume 639A, 17-17 (2020/7-1)

XMM-Newton observations of eleven intermediate polars and possible candidates.

WORPEL H., SCHWOPE A.D., TRAULSEN I., MUKAI K. and OK S.

Abstract (from CDS):


Aims. We aim to identify new intermediate polars (IPs) in XMM-Newton observations from a list of promising candidates. By selecting targets not previously known to be X-ray bright, we aim to uncover evidence for an X-ray underluminous IP subpopulation.
Methods. We performed period searches on the XMM-Newton X-ray and optical data of our targets to seek both the spin and orbital periods, which differ in IPs. We also investigated the X-ray spectra to find the hot plasma emission shown by these objects. With archival Swift data we coarsely investigated the long-term X-ray variability, and with archival optical data from a variety of catalogues, we compared the optical to X-ray luminosity to identify X-ray faint objects. This paper presents the first XMM-Newton observation of the prototype IP, DQ Her.
Results. We find firm evidence for HZ Pup, V349 Aqr, and IGR J18151-1052 being IPs, with likely white dwarf spin periods of 1552, 390, and 390s, respectively. The former two have luminosities typical of IPs, and the latter is strongly absorbed and with unknown distance. GI Mon and V1084 Her are apparently non-magnetic CVs with interesting short-term variability unrelated to WD spin. V533 Her is probably a magnetic CV and remains a good IP candidate, while V1039 Cen is possibly a polar. The remaining candidates were too faint to allow for any firm conclusions.

Abstract Copyright: © ESO 2020

Journal keyword(s): X-rays: binaries - white dwarfs - stars: magnetic field

Simbad objects: 20

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Number of rows : 20
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* V902 Mon CV* 06 27 46.4047189728 +01 48 11.027200176           ~ 18 0
2 V* GI Mon No* 07 26 47.1066965424 -06 40 29.708015988           ~ 56 0
3 V* HZ Pup No* 08 03 22.8480059616 -28 28 28.556335236       15.008   ~ 48 0
4 V* V597 Pup No* 08 16 17.9596509204 -34 15 24.933440401   21.65       ~ 52 0
5 V* DO Dra CV* 11 43 38.4921265896 +71 41 20.559036192       13.747   DQ 221 1
6 V* V1025 Cen CV* 12 38 16.3191432264 -38 42 45.836441856   15.20       ~ 83 0
7 V* EX Hya CV* 12 52 24.2222471899 -29 14 55.999766523   13.51 13.49 13.55   M5-6V 702 0
8 V* V1039 Cen No* 13 55 41.2770403200 -64 15 57.458452680           ~ 24 0
9 V* NY Lup XB* 15 48 14.5961462732 -45 28 39.918849218       14.544   K0/3Ve 103 0
10 V* V1084 Her CV* 16 43 45.6974063496 +34 02 39.549009444     12.48     ~ 40 0
11 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 14643 0
12 V* DQ Her CV* 18 07 30.2510391864 +45 51 32.564791872   14.605 14.443 14.800   M3+Ve 1017 1
13 V* V533 Her No* 18 14 20.4844831200 +41 51 22.069747872   15.000 15.032 15.274   ~ 256 0
14 IGR J18151-1052 CV* 18 15 03.8485823232 -10 51 35.035524504           ~ 15 0
15 V* V4745 Sgr CV* 18 40 02.5701267952 -33 26 55.327096179           ~ 59 0
16 V* V1425 Aql No* 19 05 26.5876835574 -01 42 18.189880804           ~ 85 0
17 V* AE Aqr CV* 20 40 09.1598959176 -00 52 15.055595220   12.46 10.40   10.191 K3-5IV/V 673 0
18 V* V349 Aqr CV* 22 38 43.8299592768 +01 08 20.710907664           ~ 26 0
19 V* CC Scl CV* 23 15 31.8594770904 -30 48 47.673022140   16.6       ~ 51 0
20 NAME Galactic Ridge ? ~ ~           ~ 503 1

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