2025ApJ...993...34D

Query : 2025ApJ...993...34D

2025ApJ...993...34D - Astrophys. J., 993, 34 (2025/November-1)

Hunt for the mHz Variability in TESS and XMM-Newton Observations of Nova-like Cataclysmic Variables.

DOBROTKA A., MAGDOLEN J. and MELICHERCIK M.

Abstract (from CDS):

We analysed the flickering of selected nova-like cataclysmic variables observed by the TESS satellite and XMM-Newton. We searched for break frequencies (fb) in the corresponding power density spectra (PDSs), and for any long-term evolution. We find a new optical fb in three nova-like systems, and confirm that the value of this frequency is clustered around 1 mHz. V504 Cen and V751 Cyg show possible X-ray counterparts of fb that had previously only been seen in MV Lyr. This points toward the very central disk for source localization. We investigated a previously proposed correlation between white dwarf mass and fb, but thanks to the new measurements, we do not confirm its existence. V3885 Sgr and V1193 Ori show flaring activity in the long-term light curve during which TESS observations were made. The corresponding PDSs show changes in shape and the disappearance of fb. TT Ari and SGRt 062340.2-265715 exhibit smooth changes in the long-term optical light curve, and the corresponding TESS observations show variable fb during these changes. fb is higher at lower brightness levels, which so far has been observed only in MV Lyr.

Abstract Copyright: © 2025. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Stellar accretion disks - Cataclysmic variable stars - White dwarf stars

Simbad objects: 57

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Number of rows : 57
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* TT Tri CV* 01 31 59.8601500776 +29 49 22.060466364           ~ 37 0
2 HS 0139+0559 CV* 01 41 39.9217828176 +06 14 37.494706740   14.9 15.4     DA 21 0
3 V* BO Cet CV* 02 06 39.2729397216 -02 03 42.590510064   14.447 14.341 14.478   ~ 35 0
4 V* TT Ari CV* 02 06 53.0797508832 +15 17 41.851038804   10.73 10.20     Bep: 459 0
5 HS 0220+0603 CV* 02 23 01.6666894560 +06 16 49.639082700   15.6 15.9     ~ 32 0
6 HS 0229+8016 CV* 02 35 58.2097250160 +80 29 44.285975556   13.9 13.9     ~ 21 0
7 V* WX Ari CV* 02 47 36.2217912312 +10 35 37.723782948   15.8       ~ 66 0
8 V* V1294 Tau CV* 04 00 37.2551443560 +06 22 45.921425232   15.6       ~ 29 0
9 V* IM Eri CV* 04 24 41.1074284200 -20 07 11.759455164 11.65 11.88 11.93     ~ 38 0
10 V* FY Per CV* 04 41 56.6371042152 +50 42 36.032846544   12.546 12.245 12.634   ~ 44 0
11 HS 0455+8315 CV* 05 06 48.2817271272 +83 19 23.254416264   15.539 15.453 15.222   ~ 20 0
12 2E 1224 CV* 05 13 36.5693562840 +77 28 42.782628216   15.3 15.4     ~ 19 0
13 V* V1193 Ori CV* 05 16 26.6714235480 -00 12 14.307002172   13.95 14.0     ~ 52 0
14 V* V363 Aur CV* 05 33 33.4591265880 +36 59 32.475580692     14.2     K0V 107 0
15 V* TW Pic CV* 05 34 50.5861498896 -58 01 40.765120788 13.84 14.83 15.10     ~ 107 2
16 V* AH Pic CV* 05 57 12.5506871640 -59 35 25.932537852 13.57 14.29 14.21 14.57 14.19 ~ 24 0
17 V* V347 Pup CV* 06 10 33.6583947384 -48 44 25.363374036   13.95 13.57 13.24 12.79 M0.5V 103 0
18 UCAC4 316-011308 CV* 06 23 40.0348994640 -26 57 50.783570064   12.719 12.724 12.783   ~ 14 0
19 HS 0642+5049 CV* 06 46 19.6073560896 +50 45 49.211945352   16.6 16.8     ~ 19 0
20 LEDA 88588 Sy1 07 08 41.4886614696 -49 33 06.308921700   16.02 15.7 12.7   ~ 566 0
21 V* HQ Mon CV* 07 11 33.7380472944 +00 52 06.662054100           ~ 28 0
22 V* V482 Cam CV* 07 33 41.4126954912 +67 32 15.629343864           ~ 25 0
23 V* EV Lyn CV* 07 54 43.0106636160 +50 07 29.095115196           ~ 17 0
24 V* IX Vel CV* 08 15 18.9688659456 -49 13 20.671780368 8.64 10.04 10.10 9.84 9.347 sdOBe 253 0
25 V* BP Lyn CV* 09 03 08.8823527584 +41 17 47.562969840           ~ 59 0
26 V* SW Sex CV* 10 15 09.3769935988 -03 08 32.850732738           ~ 223 0
27 V* RW Sex CV* 10 19 56.6224471752 -08 41 56.106711816   10.674 10.645 10.747 10.598 DAe 216 0
28 1H 1025+220 CV* 10 28 00.0805880112 +21 48 13.573560492   16.46 16.37     ~ 36 0
29 V* AM CVn CV* 12 34 54.6231062664 +37 37 44.120620056   14.02 14.13 14.47   DBnnp 434 0
30 LEDA 88835 Sy1 13 25 19.3805530608 -38 24 52.611680340   16.64 13.80 15.33 14.78 ~ 457 0
31 V* OZ Dra CV* 13 27 23.3849161008 +65 28 54.313407696           ~ 19 0
32 V* UX UMa CV* 13 36 40.9531256400 +51 54 49.423353228   12.78 13.26     sdOB 556 0
33 V* V504 Cen RC* 14 12 49.0859715240 -40 21 36.777448116           ~ 22 0
34 SDSS J160745.02+362320.7 CV* 16 07 45.0114224688 +36 23 20.732484300   17.89 18.03     ~ 12 0
35 V* V1084 Her CV* 16 43 45.6974063496 +34 02 39.549009444     12.48     ~ 44 0
36 V* V442 Oph CV* 17 32 15.1362474864 -16 15 22.068343152       14.120   ~ 93 0
37 V* V380 Oph CV* 17 50 13.6259504232 +06 05 29.236175016   15.146 14.927 14.752   ~ 53 0
38 HS 1813+6122 CV* 18 14 29.8297847472 +61 23 34.388905056   15.2 15.1     ~ 18 0
39 V* V344 Lyr CV* 18 44 39.1748179896 +43 22 28.051269960           sdB 114 0
40 V* V4743 Sgr No* 19 01 09.3393890856 -22 00 06.016418064           ~ 159 0
41 V* MV Lyr CV* 19 07 16.2886463256 +44 01 07.869892008   13.040 12.920 12.489 12.578 M5Ve 307 0
42 V* V1315 Aql CV* 19 13 54.5308677240 +12 18 03.239745228   14.81 14.33 14.33   ~ 136 0
43 V* V1504 Cyg CV* 19 28 56.4508657536 +43 05 37.081595940           ~ 122 0
44 V* V345 Pav CV* 19 35 42.9086577984 -59 08 22.724922804 13.61 13.82 13.69     ~ 33 0
45 CD-42 14462 CV* 19 47 40.5290567472 -42 00 26.395115580 9.65 10.362 10.308 10.520   sdB 243 0
46 V* GS Pav CV* 20 08 07.6210700448 -69 48 58.759918560 16.19 16.68 16.56     F5+sdB 30 0
47 V* V794 Aql CV* 20 17 33.9158772576 -03 39 50.960495196           ~ 105 0
48 V* V1776 Cyg CV* 20 23 30.5190973512 +46 31 29.438367528   17.2       ~ 37 0
49 V* CM Del CV* 20 24 56.9280034920 +17 17 54.278576160       13.693   ~ 76 0
50 EM* LkHA 170 Ae* 20 52 12.7783926120 +44 19 26.086865808   14.958 14.578 14.261   A0e 124 0
51 V* LQ Peg CV* 21 36 19.1177850768 +11 40 54.377256900   14.30       ~ 47 0
52 V* SS Cyg CV* 21 42 42.8034497592 +43 35 09.867842484 11.07 12.651 12.032 9.326   K5V 1324 1
53 V* UU Aqr CV* 22 09 05.7613016472 -03 46 17.688853416   13.998 13.919 13.735   ~ 153 0
54 V* RU Peg CV* 22 14 02.5505986656 +12 42 11.278107972     12     sdBe+G8IV:n 322 0
55 V* HL Aqr CV* 22 20 26.9273134056 +02 00 53.375434236   13.45       ~ 59 0
56 GD 1662 CV* 23 29 00.4713595416 -29 46 45.980660100   13.054 12.980 13.099   OBe 191 0
57 V* VZ Scl CV* 23 50 09.2550871008 -26 22 52.701610656           ~ 85 0

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