2021MNRAS.502.4953D

Query : 2021MNRAS.502.4953D

2021MNRAS.502.4953D - Mon. Not. R. Astron. Soc., 502, 4953-4962 (2021/April-3)

Evidence that short-period AM CVn systems are diverse in outburst behaviour.

DUFFY C., RAMSAY G., STEEGHS D., DHILLON V., KENNEDY M.R., MATA SANCHEZ D., ACKLEY K., DYER M., LYMAN J., ULACZYK K., GALLOWAY D.K., O'BRIEN P., NOYSENA K., NUTTALL L. and POLLACCO D.

Abstract (from CDS):

We present results of our analysis of up to 15 yr of photometric data from eight AM CVn systems with orbital periods between 22.5 and 26.8 min. Our data have been collected from the GOTO, ZTF, Pan-STARRS, ASAS-SN, and Catalina all-sky surveys and amateur observations collated by the AAVSO. We find evidence that these interacting ultracompact binaries show a similar diversity of long-term optical properties as the hydrogen accreting dwarf novae. We found that AM CVn systems in the previously identified accretion disc instability region are not a homogenous group. Various members of the analysed sample exhibit behaviour reminiscent of Z Cam systems with long superoutbursts (SOs) and standstills, SU UMa systems with regular, shorter SOs, and nova-like systems that appear only in a high state. The addition of TESS full frame images of one of these systems, KL Dra, reveals the first evidence for normal outbursts appearing as a precursor to SOs in an AM CVn system. Our results will inform theoretical modelling of the outbursts of hydrogen deficient systems.

Abstract Copyright: © 2021 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society

Journal keyword(s): accretion, accretion discs - surveys - binaries: close - stars: dwarf novae

Simbad objects: 17

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Number of rows : 17
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* WX Hyi CV* 02 09 50.8241651856 -63 18 39.831098040   10.70     13.038 ~ 206 0
2 ASASSN -14mv CV* 07 13 27.2826924408 +20 55 53.285034396   16.8   17.7   DB 25 0
3 PTF1 J071912.13+485834.0 CV* 07 19 12.1179047304 +48 58 34.704243516           ~ 27 0
4 SDSS J080449.49+161624.8 CV* 08 04 49.4916114456 +16 16 24.871098576           ~ 32 0
5 V* SU UMa CV* 08 12 28.2695986944 +62 36 22.427676396           B2 516 0
6 V* Z Cam CV* 08 25 13.1986690656 +73 06 39.284964108   12.006 11.927 11.712   ~ 554 0
7 V* EG Cnc CV* 08 43 03.9863206560 +27 51 49.693595508           DAe 195 0
8 V* AM CVn CV* 12 34 54.6231062664 +37 37 44.120620056   14.02 14.13 14.47   DBnnp 434 0
9 V* V803 Cen CV* 13 23 44.5389056832 -41 44 29.446810404   16.8 14.42     ~ 155 0
10 V* CR Boo CV* 13 48 55.2218717736 +07 57 35.724118680     15.00     ~ 185 0
11 CXOGBS J175107.6-294037 CV* 17 51 07.6557820800 -29 40 37.344991512           ~ 15 0
12 PTF1 J191905.19+481506.2 CV* 19 19 05.1816067272 +48 15 06.046801524           ~ 27 0
13 V* KL Dra CV* 19 24 38.2451853000 +59 41 46.722283224   16.8       DB+ 64 1
14 ASASSN -14cc CV* 21 39 48.2481573384 -59 59 32.847656820           ~ 14 0
15 V* SS Cyg CV* 21 42 42.8034497592 +43 35 09.867842484 11.07 12.651 12.032 9.326   K5V 1324 1
16 PTF1 J221910.09+313523.1 CV* 22 19 10.09 +31 35 23.1           ~ 10 0
17 PSO J337.1127+49.8212 CV* 22 28 27.0672368736 +49 49 16.495177944           ~ 8 0

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