2003A&A...404.1067N


Query : 2003A&A...404.1067N

2003A&A...404.1067N - Astronomy and Astrophysics, volume 404, 1067-1075 (2003/6-4)

In-the-gap SU UMa-type dwarf nova, Var73 Dra with a supercycle of about 60 days.

NOGAMI D., UEMURA M., ISHIOKA R., KATO T., TORII K., STARKEY D.R., TANABE K., VANMUNSTER T., PAVLENKO E.P., GORANSKIJ V.P., BARSUKOVA E.A., ANTONIUK O., MARTIN B., COOK L.M., MASI G. and MALLIA F.

Abstract (from CDS):

An intensive photometric-observation campaign of the recently discovered SU UMa-type dwarf nova, Var73 Dra was conducted from 2002 August to 2003 February. We caught three superoutbursts in 2002 October, December and 2003 February. The recurrence cycle of the superoutburst (supercycle) is indicated to be ∼60d, the shortest among the values known so far in SU UMa stars and close to those of ER UMa stars. The superhump periods measured during the first two superoutbursts were 0.104885(93)d, and 0.10623(16)d, respectively. A 0.10424(3)-d periodicity was detected in quiescence. The change rate of the superhump period during the second superoutburst was 1.7x10–3, which is an order of magnitude larger than the largest value ever known. Outburst activity has changed from a phase of frequent normal outbursts and infrequent superoutbursts in 2001 to a phase of infrequent normal outbursts and frequent superoutbursts in 2002. Our observations are negative to an idea that this star is an related object to ER UMa stars in terms of the duty cycle of the superoutburst and the recurrence cycle of the normal outburst. However, to trace the superhump evolution throughout a superoutburst, and from quiescence more effectively, may give a fruitful result on this matter.

Abstract Copyright:

Journal keyword(s): accretion, accretion disks - novae, cataclysmic variables - stars: dwarf novae - stars: individual: Var73 Dra

CDS comments: Table 1 : USNO-B1.0 001545-0228537 (star 8) is a misprint for 001546-0228537.

Simbad objects: 22

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Number of rows : 22
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 V* WX Cet CV* 01 17 04.1794193856 -17 56 22.414606224           ~ 168 0
2 V* SU UMa CV* 08 12 28.2695986944 +62 36 22.427676396           B2 490 0
3 V* SW UMa CV* 08 36 42.7492998216 +53 28 37.976599020           ~ 300 0
4 V* EG Cnc CV* 08 43 03.9863206560 +27 51 49.693595508           DAe 174 0
5 V* DI UMa CV* 09 12 16.1933315112 +50 53 53.956934520           ~ 81 0
6 V* V485 Cen CV* 12 57 23.1807645432 -33 12 05.742562932           ~ 101 0
7 V* HV Vir CV* 13 21 03.1661521320 +01 53 29.075499492           DA 153 0
8 V* V877 Ara CV* 17 16 53.9397411792 -65 32 51.656391456           ~ 20 0
9 V* BF Ara CV* 17 38 21.3279286968 -47 10 41.551884804           ~ 46 0
10 V* DM Lyr CV* 18 58 44.4381051744 +30 15 33.389060383           ~ 34 0
11 V* V1113 Cyg CV* 19 22 41.9775560904 +52 43 59.237385492           ~ 32 0
12 V* V1028 Cyg CV* 20 00 56.4596100362 +56 56 37.060154519           ~ 53 0
13 TYC 4241-865-1 * 20 22 29.5187464272 +64 36 02.407331844   11.41 10.64     ~ 1 0
14 TYC 4241-1806-1 * 20 22 39.1959050184 +64 34 38.267642856   11.88 11.59     ~ 1 0
15 USNO-B1.0 1545-00231804 * 20 23 08.3125129752 +64 31 18.117265080   13.37       ~ 1 0
16 USNO-B1.0 1545-00231894 * 20 23 29.4440328720 +64 35 09.524655312   17.30       ~ 1 0
17 USNO-B1.0 1545-00231905 * 20 23 32.5770037872 +64 35 29.099429808   16.72       ~ 1 0
18 USNO-B1.0 1546-00228537 * 20 23 35.3335779168 +64 36 56.285411508   16.51       ~ 1 0
19 V* MN Dra CV* 20 23 38.1862508040 +64 36 26.592618240           ~ 43 1
20 USNO-B1.0 1546-00228620 * 20 24 00.4496678520 +64 37 05.796928740   13.53       ~ 1 0
21 V* V503 Cyg CV* 20 27 17.3992939944 +43 41 22.504607556           ~ 131 0
22 V* KK Tel CV* 20 28 38.5099147224 -52 18 45.184064220   19.0   19.1   ~ 45 0

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2023.02.04-09:06:23

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