2014A&A...566A.101B


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.08CEST04:27:52

2014A&A...566A.101B - Astronomy and Astrophysics, volume 566A, 101-101 (2014/6-1)

Long-term photometry of the eclipsing dwarf nova V893 Scorpii. Orbital period, oscillations, and a possible giant planet.

BRUCH A.

Abstract (from CDS):

The cataclysmic variable V893 Sco is an eclipsing dwarf nova which, apart from outbursts with comparatively low amplitudes, exhibits a particularly strong variability during quiescence on timescales of days to seconds. The present study aims to update the outdated orbital ephemerides published previously, to investigate deviations from linear ephemerides, and to characterize non-random brightness variations in a range of timescales. Light curves of V893 Sco were observed on 40 nights, spanning a total time base of about 14 years. They contain 114 eclipses which were used to significantly improve the precision of the orbital period and to study long-term variations of the time of revolution. Oscillations and similar brightness variations were studied with Fourier techniques in the individual light curves. The orbital period exhibits long-term variations with a cycle time of 10.2 years. They can be interpreted as a light travel time effect caused by the presence of a giant planet with approximately 9.5 Jupiter masses in a 4.5AU orbit around V893 Sco. On some nights transient semi-periodic variations on timescales of several minutes can be seen which may be identified as quasi-periodic oscillations. However, it is difficult to distinguish whether they are caused by real physical mechanisms or if they are the effect of an accidental superposition of unrelated flickering flares. Simulations to investigate this question are presented.

Abstract Copyright:

Journal keyword(s): binaries: eclipsing - stars: dwarf novae - stars: individual: V893 Scorpii - planets and satellites: detection

VizieR on-line data: <Available at CDS (J/A+A/566/A101): table1.dat phot/*>

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 - 2020
#notes
1 V* HT Cas DN* 01 10 13.1213309510 +60 04 35.489284826           M5.5e 366 0
2 V* UZ For AM* 03 35 28.6515678221 -25 44 21.765602833           M4.5 245 0
3 V* RR Cae WD* 04 21 05.5631969817 -48 39 07.062891386 14.50 14.92 14.40     DA7.8 134 1
4 V* TV Col No* 05 29 25.5292527066 -32 49 03.900974253     13.60     K1 306 0
5 V* T Aur No* 05 31 59.1179548200 +30 26 45.033734428 4.80 4.49 4.10     ~ 256 1
6 V* V470 Cam HS* 07 10 42.0512018720 +66 55 43.520280054           sdB+dM 92 1
7 V* Z Cha DN* 08 07 27.7421647579 -76 32 00.679589237   12.00       M5.5 588 1
8 V* AC Cnc EB* 08 44 27.1122164614 +12 52 31.996499274   13.80 14.15     K1-3V 122 0
9 V* OY Car DN* 10 06 22.0792108747 -70 14 04.582997921           ~ 549 0
10 V* DP Leo AM* 11 17 15.9238061197 +17 57 41.680410866           ~ 210 1
11 BD-07 3477 HS* 12 44 20.2386520980 -08 40 16.848587212   10.46 10.594 10.895   sdB2VIIHe3 249 1
12 V* UX UMa NL* 13 36 40.9533414077 +51 54 49.424110262   12.78 13.26     Oev: 498 0
13 V* QS Vir WD* 13 49 52.0031855330 -13 13 37.001934702 14.27 14.98 14.40 14.37   DA3+dM 122 1
14 V* NN Ser No* 15 52 56.1202658103 +12 54 44.432043501     16.51     DAO1+M4 232 0
15 UCAC2 19933473 * 16 15 11.5135068762 -28 35 38.058187068       12.85   ~ 1 0
16 V* V893 Sco DN* 16 15 14.9806097394 -28 37 32.113976203           ~ 74 0
17 V* V2051 Oph DN* 17 08 19.0875545832 -25 48 31.695764973   17.5       ~ 225 0
18 V* DQ Her No* 18 07 30.2510755201 +45 51 32.564649735   12.99 15.16 11.46   M3+Ve 959 1
19 V* HU Aqr AM* 21 07 58.1945403160 -05 17 40.557984218   15.1   15.4   D+M4V 256 1
20 V* IP Peg DN* 23 23 08.5362716048 +18 24 59.206210572           M2 358 0

    Equat.    Gal    SGal    Ecl

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2020.07.08-04:27:52

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