2020MNRAS.491..344R

Query : 2020MNRAS.491..344R

2020MNRAS.491..344R - Mon. Not. R. Astron. Soc., 491, 344-355 (2020/January-1)

Analysis of spiral structure in the accretion disc of the nova-like cataclysmic variable EC21178-5417.

RUIZ-CARMONA R., KHANGALE Z.N., WOUDT P.A. and GROOT P.J.

Abstract (from CDS):

We present an extensive Doppler tomography study of the eclipsing nova-like EC21178-5417, which exhibits the classic accretion disc signature in the form of double-peak emission lines in its spectrum. Doppler tomograms confirm the presence of a strong, two-armed spiral pattern visible in the majority of the spectral lines studied. This makes EC21178-5417 one of the very few nova-likes that show spiral structure in their discs. We also report night-to-night changes in the position and relative strength of the spiral arms, revealing fluctuations on the conditions in the accretion disc.

Abstract Copyright: © 2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): accretion - accretion discs - shock waves - stars: individual: EC21178-5417 - novae - cataclysmic variables

Simbad objects: 12

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Number of rows : 12
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* RW Tri CV* 02 25 36.1556820000 +28 05 50.891220600   13.50 12.50     M0V 324 0
2 V* V347 Pup CV* 06 10 33.6583947384 -48 44 25.363374036   13.95 13.57 13.24 12.79 M0.5V 103 0
3 V* U Gem CV* 07 55 05.2324414746 +22 00 05.044127985   15.3 14.54     DA 1135 0
4 G 61-29 CV* 13 05 42.4009686696 +18 01 03.763561619   16.059 16.101 15.825   DBe 284 0
5 V* UX UMa CV* 13 36 40.9531256400 +51 54 49.423353228   12.78 13.26     sdOB 556 0
6 V* EX Dra No* 18 04 14.2485669582 +67 54 12.273781393   14.775 14.479 14.490   ~ 135 0
7 V* V3385 Sgr RR* 18 28 14.9814357000 -33 29 49.714484244         14.383 ~ 10 0
8 CD-44 12736 PM* 18 36 25.9502475648 -44 18 36.907592904   10.83 10.22     G0 222 0
9 CD-42 14462 CV* 19 47 40.5290567472 -42 00 26.395115580 9.65 10.362 10.308 10.520   sdB 243 0
10 V* WZ Sge CV* 20 07 36.5037622512 +17 42 14.733254952   15.30 15.20 10.817   D 982 0
11 EC 21178-5417 CV* 21 21 26.5341797352 -54 04 34.626536292 13.11 13.77 13.70     ~ 25 0
12 V* IP Peg CV* 23 23 08.5362249504 +18 24 59.206884012           M2 395 0

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