2023AJ....166...56L

Query : 2023AJ....166...56L

2023AJ....166...56L - Astron. J., 166, 56 (2023/August-0)

LAMOST J2043+3413-a Fast Disk Precession SW Sextans Candidate in Period Gap.

LI X., WANG X., LIU J., GUO J., ZHANG Z., SUN Y., SONG X. and LIU C.

Abstract (from CDS):

We present follow-up photometric observations and time-series analysis of a nova-like, SW Sextans-type, cataclysmic variable (CV) candidate, LAMOST J204305.95+341340.6 (hereafter J2043+3413), with a Gaia G-band magnitude of 15.30 and a distance of 990 pc, which was identified from the LAMOST spectrum. The photometric data were collected with the Tsinghua-NAOC 0.8 m telescope (TNT), Transiting Exoplanet Survey Satellite (TESS), Zwicky Transient Facility (ZTF), and ASAS-SN. The TESS light curve reveals the presence of two prominent periods of 2.587(8) hr and 1.09(5) days, corresponding to the orbital and superorbital (precession) period, respectively. The TNT data obtained in 2020 shows a possible quasiperiodic oscillation of 1426 s. The precession period is about three times shorter than that of CVs with similar orbital periods, indicating an unusually fast precessing accretion disk. The ZTF data is found to show a sudden decline of ∼0.4 mag on MJD 58979. From the intermittent behavior of the eclipse, we deduce that J2043+3413 is an intermediate inclination system of CV, similar to V795 Her, which is also situated in the period gap.

Abstract Copyright: © 2023. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Cataclysmic variable stars - Nova-like variable stars - Stellar accretion disks - Eclipsing binary stars

Simbad objects: 13

goto Full paper

goto View the references in ADS

Number of rows : 13
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 Ari CV* 02 06 53.0797508832 +15 17 41.851038804   10.73 10.20     Bep: 459 0
2 V* IM Eri CV* 04 24 41.1074284200 -20 07 11.759455164 11.65 11.88 11.93     ~ 38 0
3 V* AQ Men CV* 05 07 53.7698009664 -79 51 23.049678852 14.27 14.424 14.192 14.560   ~ 31 0
4 V* TV Col CV* 05 29 25.5292422792 -32 49 03.900212364   14.219 13.846 14.181   K2V 362 0
5 V* AH Men CV* 06 11 44.605776 -81 49 23.29824 12.62 13.326 13.010 13.211   ~ 88 0
6 V* BK Lyn CV* 09 20 11.2020621696 +33 56 42.356468364   13.97 13.99 14.72   ~ 125 1
7 V* AM CVn CV* 12 34 54.6231062664 +37 37 44.120620056   14.02 14.13 14.47   DBnnp 434 0
8 V* V795 Her CV* 17 12 56.1689188488 +33 31 19.240640724   12.53 12.64 12.69   ~ 191 0
9 V* V442 Oph CV* 17 32 15.1362474864 -16 15 22.068343152       14.120   ~ 93 0
10 V* V603 Aql No* 18 48 54.6369872232 +00 35 02.857106184 10.73 12.106 12.087 11.986   OB+e: 564 0
11 V* MV Lyr CV* 19 07 16.2886463256 +44 01 07.869892008   13.040 12.920 12.489 12.578 M5Ve 307 0
12 V* HR Del No* 20 42 20.3468874528 +19 09 39.305636208   12.380 12.404 12.508   ~ 515 0
13 2MASS J20430593+3413405 CV* 20 43 05.9479194216 +34 13 40.629391752   16.0 15.0     ~ 14 0

To bookmark this query, right click on this link: simbad:objects in 2023AJ....166...56L and select 'bookmark this link' or equivalent in the popup menu